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Wiki source code of Water Quality Sensors

Version 69.10 by Karry Zhuang on 2025/07/15 19:11
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1 **Table of Contents:**
2
3 {{toc/}}
4
5
6
7
8 = 1. DR-ECK Water EC Probe =
9
10 == 1.1 Specification: ==
11
12
13 * **Power Input**: DC7~~30
14
15 * **Power Consumption** : < 0.5W
16
17 * **Interface**: RS485. 9600 Baud Rate
18
19 * **EC Range & Resolution:**
20 ** **ECK0.01** : 0.02 ~~ 20 μS/cm
21 ** **ECK0.1**: 0.2 ~~ 200.0 μS/cm
22 ** **ECK1.0** : 0 ~~ 2,000 μS/cm  Resolution: 1 μS/cm
23 ** **ECK10.0** : 10 ~~ 20,000 μS/cm  Resolution: 10 μS/cm
24 ** **ECK200.0** : 1 ~~ 200,000 μS/cm  Resolution: 1 μS/cm
25
26 * **EC Accuracy**: ±1% FS
27 * **Temperature Accuracy: **±0.5 °C
28 * **Working environment:**
29 ** Ambient Temperature: 0–60°C
30 ** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
31 ** ECK200.0 Continuous monitoring of cross-section water quality, aquaculture, sewage treatment, environmental protection, pharmaceuticals, food, tap water, seawater and other high conductivity environments
32 * **IP Rated**: IP68
33
34 * **Max Pressure**: 0.6MPa
35
36 == 1.2 Application for Different Range ==
37
38
39 [[image:image-20240714173018-1.png]]
40
41
42 == 1.3 Wiring ==
43
44
45 [[image:image-20241129142314-1.png||height="352" width="1108"]]
46
47
48 == 1.4 Mechinical Drawing ==
49
50 ECK1 and ECK10  ECK200
51
52
53 [[image:image-20240714174241-2.png]] [[image:1752564223905-283.png||height="399" width="160"]]
54
55
56 == 1.5 Installation ==
57
58
59 **Electrode installation form:**
60
61 A: Side wall installation
62
63 B: Top flange installation
64
65 C: Pipeline bend installation
66
67 D: Pipeline bend installation
68
69 E: Flow-through installation
70
71 F: Submerged installation
72
73 [[image:image-20240718190121-1.png||height="350" width="520"]]
74
75 **Several common installation methods of electrodes**
76
77 When installing the sensor on site, you should strictly follow the correct installation method shown in the following picture. Incorrect installation method will cause data deviation.
78
79 A. Several common incorrect installation methods
80
81 [[image:image-20240718190204-2.png||height="262" width="487"]]
82
83 **Error cause:** The electrode joint is too long, the extension part is too short, the sensor is easy to form a dead cavity, resulting in measurement error.
84
85 [[image:image-20240718190221-3.png||height="292" width="500"]]
86
87 **Error cause: **Measurement error or instability may occur due to water flow not being able to fill the pipe or air accumulation at high altitudes.
88
89 B. Correct installation method
90
91 [[image:image-20240718190249-4.png||height="287" width="515"]]
92
93
94 == 1.6 Maintenance ==
95
96
97 * The equipment itself generally does not require daily maintenance. When an obvious fault occurs, please do not open it and repair it yourself, and contact us as soon as possible.
98
99 * If the electrode is not used for a long time, it can generally be stored in a dry place, but it must be placed (stored) in distilled water for several hours before use to activate the electrode. Electrodes that are frequently used can be placed (stored) in distilled water.
100
101 * Cleaning of conductivity electrodes: Organic stains on the electrode can be cleaned with warm water containing detergent, or with alcohol. Calcium and magnesium precipitates are best cleaned with 10% citric acid. The electrode plate or pole can only be cleaned by chemical methods or by shaking in water. Wiping the electrode plate will damage the coating (platinum black) on the electrode surface.
102
103 * The equipment should be calibrated before each use. It is recommended to calibrate it every 3 months for long-term use. The calibration frequency should be adjusted appropriately according to different application conditions (degree of dirt in the application, deposition of chemical substances, etc.).
104
105 == 1.7 RS485 Commands ==
106
107
108 RS485 signal (K1 default address 0x12; K10 default address 0x11):
109 Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
110
111
112 === 1.7.1 Query address ===
113
114
115 **send:**
116
117 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
118 |=(% style="width: 74.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Quantity low|=(% style="width: 59.75px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 59.75px;background-color:#4F81BD;color:white" %)CRC16 high
119 |(% style="width:99px" %)0XFE |(% style="width:72px" %)0X03|(% style="width:50px" %)0X00|(% style="width:42px" %)0X50|(% style="width:42px" %)0X00|(% style="width:42px" %)0X00|(% style="width:56px" %)0X51|(% style="width:56px" %)0XD4
120
121 If you forget the original address of the sensor, you can use the broadcast address 0XFE instead. When using 0XFE, the host can only connect to one slave, which can be used as a method of address query.
122
123
124 **response:**
125
126 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
127 |=(% style="width: 100px;background-color:#4F81BD;color:white" %)New address|=(% style="width: 110px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 106px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 93px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 104px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
128 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
129
130
131
132 === 1.7.2 Change address ===
133
134
135 For example: Change the address of the sensor with address 1 to 2, master → slave
136
137 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
138 |=(% style="width: 74.75px; background-color: rgb(79, 129, 189); color: white;" %)Original address|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
139 |(% style="width:67px" %)0X01|(% style="width:76px" %)0X06|(% style="width:60px" %)0X00|(% style="width:50px" %)0X50|(% style="width:50px" %)0X00|(% style="width:50px" %)0X02|(% style="width:57px" %)0X08|(% style="width:56px" %)0X1A
140
141 If the sensor receives correctly, the data is returned along the original path.
142
143 (% style="color:red" %)**Note: If you forget the original address of the sensor, you can use the broadcast address 0XFE instead. When using 0XFE, the host can only connect to one slave, and the return address is still the original address, which can be used as a method of address query.**
144
145
146 === 1.7.3 Modify intercept ===
147
148
149 **send:**
150
151 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
152 |=(% style="width: 64px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 64px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 64px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 64px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 64px;background-color:#4F81BD;color:white" %)CRC16 high
153 |(% style="width:64px" %)0X01|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X23|(% style="width:85px" %)0X00|(% style="width:1px" %)0X01|(% style="width:1px" %)0XF8|(% style="width:1px" %)(((
154 0X07
155 )))
156
157 Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
158
159 **response:**
160
161 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
162 |=(% style="width: 64px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 64px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 64px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 64px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 64px;background-color:#4F81BD;color:white" %)CRC16 high
163 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X06|(% style="width:135px" %)(((
164 0X02
165 )))|(% style="width:126px" %)0X00|(% style="width:85px" %)0X00|(% style="width:1px" %)0X0A|(% style="width:1px" %)0X38|(% style="width:1px" %)(((
166 0X8F
167 )))
168
169 === 1.7.4 Query data ===
170
171
172 Query the data (EC,temperature) of the sensor (address 11), host → slave
173
174 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
175 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
176 |(% style="width:99px" %)0X11|(% style="width:72px" %)0X03|(% style="width:64px" %)0X00|(% style="width:68px" %)0X00|(% style="width:70px" %)0X00|(% style="width:72px" %)0X02|(% style="width:56px" %)0XC6|(% style="width:56px" %)0X9B
177
178 If the sensor receives correctly, the following data will be returned, slave → host
179
180 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
181 |=(% style="width: 40px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data high|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
182 |(% style="width:99px" %)0X11|(% style="width:72px" %)0X03|(% style="width:68px" %)0X04|(% style="width:70px" %)0X02|(% style="width:72px" %)0XAE|(% style="width:56px" %)0X01|(% style="width:56px" %)0X64|(% style="width:56px" %)0X8B|(% style="width:56px" %)0XD0
183
184 The address of the EC K10 sensor is 11
185
186 The query data command is 11 03 00 00 00 02 C6 9B
187
188 **For example**, the returned data is 11 03 04 (% style="color:red" %)**02 AE**(%%) 01 64 8B D0. 02 AE is converted to decimal 686,  K=10, EC: 6860uS/cm,temperature: 35.6℃ Convert the returned data to decimal and divide by 10.
189
190
191 Query the data (EC,temperature) of the sensor (address 11), host → slave
192
193 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
194 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
195 |(% style="width:99px" %)0X12|(% style="width:72px" %)0X03|(% style="width:64px" %)0X00|(% style="width:68px" %)0X00|(% style="width:70px" %)0X00|(% style="width:72px" %)0X02|(% style="width:56px" %)0XC6|(% style="width:56px" %)0XA8
196
197 If the sensor receives correctly, the following data will be returned, slave → host
198
199 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
200 |=(% style="width: 40px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data high|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
201 |(% style="width:99px" %)0X12|(% style="width:72px" %)0X03|(% style="width:68px" %)0X04|(% style="width:70px" %)0X02|(% style="width:72px" %)0XAE|(% style="width:56px" %)0X01|(% style="width:56px" %)0X64|(% style="width:56px" %)0XB8|(% style="width:56px" %)0XD0
202
203 The address of the EC K1 sensor is 12
204
205 The query data command is 12 03 00 00 00 02 C6 A8
206
207 **For example**, the returned data is 12 03 04 (% style="color:red" %)**02 AE**(%%) 01 64 B8 D0. 02 AE is converted to decimal 686,  K=1, EC: 686uS/cm,temperature: 35.6℃ Convert the returned data to decimal and divide by 10.
208
209
210 ECK200
211
212 === 1.7.5 Calibration Method ===
213
214 ECK1 and ECK10.0
215
216 This device uses one-point calibration, and you need to prepare a known E standard solution. When mileage K=1, 1~~2000 uses 1413μS/cm standard solution, and when mileage K=10, 10~~20000 uses 12.88mS/cm standard solution.
217
218 (% style="color:blue" %)**The calibration steps are as follows:**
219
220 (1) Place the electrode in distilled water and clean it. When mileage 1~~2000 uses 1413μS/cm standard solution, enter the following calibration command after the data is stable.
221
222 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
223 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Data|=(% style="width: 53px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 53px;background-color:#4F81BD;color:white" %)CRC16 high
224 |(% style="width:99px" %)0X12|(% style="width:112px" %)0X10|(% style="width:135px" %)0X00|(% style="width:126px" %)0X26|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0X04|(% style="width:1px" %)(((
225 0X00
226 0X00
227 0X37
228 0X32
229 )))|(% style="width:1px" %)0XBD|(% style="width:1px" %)0XFC
230
231 1413*10 gives 0X00003732
232
233 **response:**
234
235 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
236 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 high
237 |(% style="width:99px" %)0X12|(% style="width:112px" %)0X10|(% style="width:135px" %)0X00|(% style="width:126px" %)0X26|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0XA2|(% style="width:1px" %)0XA0
238
239 (2) Place the electrode in distilled water to clean it. Use 12.88mS/cm standard solution for the range of 10~~20000. After the data is stable, enter the following calibration command
240
241 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
242 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Data|=(% style="width: 53px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 53px;background-color:#4F81BD;color:white" %)CRC16 high
243 |(% style="width:99px" %)0X11|(% style="width:112px" %)0X10|(% style="width:135px" %)0X00|(% style="width:126px" %)0X26|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0X04|(% style="width:1px" %)(((
244 0X00
245 0X01
246 0XF7
247 0X20
248 )))|(% style="width:1px" %)0X33|(% style="width:1px" %)0X75
249
250 12880*10 gives 0X01F720
251
252 **response:**
253
254 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
255 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 high
256 |(% style="width:99px" %)0X11|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X26|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0XEB|(% style="width:1px" %)0X50
257
258
259
260 ECK200.0
261
262 For the device with address 01, use 1413uS/cm standard solution to calibrate the first point. Send frame: 1413. Convert hexadecimal to 585. Write 0001, 00 00, 0585 to 0x0120, 0x0121, 0x0122 respectively.
263
264 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
265 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Register Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Register length|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Data length|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Register contents|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 53px;background-color:#4F81BD;color:white" %)CRC16 high
266 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X10|(% style="width:135px" %)0X01 0X20|(% style="width:126px" %)0X00 0X03|(% style="width:85px" %)0X06|(% style="width:1px" %)(((
267 0X00
268 0X01
269 0X00
270 0X00
271 0X05
272 0X85
273 )))|(% style="width:1px" %)0X1c|(% style="width:1px" %)(((
274 (((
275 0X25
276 )))
277 )))
278
279 **response:**
280
281 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:534.333px" %)
282 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Register Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Register length|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Data length|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 60px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
283 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X10|(% style="width:135px" %)0X01 0X02|(% style="width:126px" %)0X00 0X03|(% style="width:85px" %)0X06|(% style="width:1px" %)(((
284 0X80
285 )))|(% style="width:60px" %)0X3e(((
286
287 )))
288
289 Use 111310uS/cm standard solution to calibrate the second point and send the frame: 111310 is converted into hexadecimal 1b2ce, and 0002, 0001,b2 ce are written to 0x0120, 0x0121, and 0x0122 respectively.
290
291 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
292 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Register Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Register length|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Data length|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Register contents|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 53px;background-color:#4F81BD;color:white" %)CRC16 high
293 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X10|(% style="width:135px" %)0X01 0X20|(% style="width:126px" %)0X00 0X03|(% style="width:85px" %)0X06|(% style="width:1px" %)(((
294 0X00
295 0X02
296 0X00
297 0X01
298 0Xb2
299 0Xce
300 )))|(% style="width:1px" %)0X3e|(% style="width:1px" %)(((
301 (((
302 0X22
303 )))
304 )))
305
306 **response:**
307
308 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:534.333px" %)
309 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Register Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Register length|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Data length|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 60px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
310 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X10|(% style="width:135px" %)0X01 0X02|(% style="width:126px" %)0X00 0X03|(% style="width:85px" %)0X06|(% style="width:1px" %)(((
311 0X80
312 )))|(% style="width:60px" %)0X3e
313
314 = 2. DR-PH01 Water PH Sensor =
315
316 == 2.1 Specification ==
317
318
319 * **Power Input**: DC7~~30
320
321 * **Power Consumption** : < 0.5W
322
323 * **Interface**: RS485. 9600 Baud Rate
324
325 * **pH measurement range**: 0~~14.00pH; resolution: 0.01pH
326
327 * **pH measurement error**: ±0.15pH
328
329 * **Repeatability error**: ±0.02pH
330
331 * **Temperature measurement range**:0~~60°C; resolution: 0.1°C (set temperature for manual temperature compensation, default 25°C)
332
333 * **Temperature measurement error**: ±0.5°C
334
335 * **Working environment:**
336 ** Ambient Temperature: 0–60°C
337 ** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
338
339 * **Temperature Accuracy: **±0.5 °C
340
341 * **IP Rated**: IP68
342
343 * **Max Pressure**: 0.6MPa
344
345 == 2.2 Wiring ==
346
347
348 [[image:image-20240720172548-2.png||height="348" width="571"]]
349
350
351 == 2.3 Mechinical Drawing ==
352
353
354 [[image:image-20240714174241-2.png]]
355
356
357 == 2.4 Installation Notice ==
358
359
360 Do not power on while connect the cables. Double check the wiring before power on.
361
362 Installation Photo as reference:
363
364 (% style="color:blue" %)**Submerged installation:**
365
366 The lead wire of the equipment passes through the waterproof pipe, and the 3/4 thread on the top of the equipment is connected to the 3/4 thread of the waterproof pipe with raw tape. Ensure that the top of the equipment and the equipment wire are not flooded.
367
368 [[image:image-20240718191348-6.png]]
369
370 (% style="color:blue" %)**Pipeline installation:**
371
372 Connect the equipment to the pipeline through the 3/4 thread.
373
374 [[image:image-20240718191336-5.png||height="239" width="326"]]
375
376 (% style="color:blue" %)**Sampling:**
377
378 Take representative water samples according to sampling requirements. If it is inconvenient to take samples, you can also put the electrode into the solution to be tested and read the output data. After a period of time, take out the electrode and clean it.
379
380 (% style="color:blue" %)**Measure the pH of the water sample:**
381
382 First rinse the electrode with distilled water, then rinse it with the water sample, then immerse the electrode in the sample, carefully shake the test cup or stir it to accelerate the electrode balance, let it stand, and record the pH value when the reading is stable.
383
384
385 == 2.5 Maintenance ==
386
387
388 * The equipment itself generally does not require daily maintenance. When an obvious fault occurs, please do not open it and repair it yourself. Contact us as soon as possible!
389
390 * There is an appropriate amount of soaking solution in the protective bottle at the front end of the electrode. The electrode head is soaked in it to keep the glass bulb and the liquid junction activated. When measuring, loosen the bottle cap, pull out the electrode, and rinse it with pure water before use.
391
392 * Preparation of electrode soaking solution: Take a packet of PH4.00 buffer, dissolve it in 250 ml of pure water, and soak it in 3M potassium chloride solution. The preparation is as follows: Take 25 grams of analytical pure potassium chloride and dissolve it in 100 ml of pure water.
393
394 * The glass bulb at the front end of the electrode cannot come into contact with hard objects. Any damage and scratches will make the electrode ineffective.
395
396 * Before measurement, the bubbles in the electrode glass bulb should be shaken off, otherwise it will affect the measurement. When measuring, the electrode should be stirred in the measured solution and then placed still to accelerate the response.
397
398 * The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
399
400 * After long-term use, the pH electrode will become passivated, which is characterized by a decrease in sensitivity gradient, slow response, and inaccurate readings. At this time, the bulb at the bottom of the electrode can be soaked in 0.1M dilute hydrochloric acid for 24 hours (0.1M dilute hydrochloric acid preparation: 9 ml of hydrochloric acid is diluted to 1000 ml with distilled water), and then soaked in 3.3M potassium chloride solution for 24 hours. If the pH electrode is seriously passivated and soaking in 0.1M hydrochloric acid has no effect, the pH electrode bulb can be soaked in 4% HF (hydrofluoric acid) for 3-5 seconds, washed with pure water, and then soaked in 3.3M potassium chloride solution for 24 hours to restore its performance.
401
402 * Glass bulb contamination or liquid junction blockage can also cause electrode passivation. At this time, it should be cleaned with an appropriate solution according to the nature of the contaminant.
403
404 * The equipment should be calibrated before each use. For long-term use, it is recommended to calibrate once every 3 months. The calibration frequency should be adjusted appropriately according to different application conditions (degree of dirt in the application, deposition of chemical substances, etc.). After aging, the electrodes should be replaced in time.
405
406 == 2.6 RS485 Commands ==
407
408
409 RS485 signaldefault address 0x10
410 Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
411
412
413 === 2.6.1 Query address ===
414
415
416 **send:**
417
418 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
419 |=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)CRC16 high
420 |(% style="width:99px" %)0XFE |(% style="width:112px" %)0X03|(% style="width:135px" %)0X00|(% style="width:126px" %)0X50|(% style="width:85px" %)0X00|(% style="width:1px" %)0X00|(% style="width:1px" %)0X51|(% style="width:1px" %)0XD4
421
422 **response:**
423
424 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
425 |=(% style="width: 103.6px;background-color:#4F81BD;color:white" %)New address|=(% style="width: 103.6px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
426 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
427
428 === 2.6.2 Change address ===
429
430
431 For example: Change the address of the sensor with address 1 to 2, master → slave
432
433 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
434 |=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)CRC16 high
435 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X50|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0X08|(% style="width:1px" %)0X1A
436
437 If the sensor receives correctly, the data is returned along the original path.
438
439 (% style="color:red" %)**Note: If you forget the original address of the sensor, you can use the broadcast address 0XFE instead. When using 0XFE, the host can only connect to one slave, and the return address is still the original address, which can be used as a method of address query.**
440
441
442 === 2.6.3 Modify intercept ===
443
444
445 **send:**
446
447 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
448 |=(% style="width: 44.75px; background-color: rgb(79, 129, 189); color: white;" %)Address|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 69.75px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 69.75px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address  low|=(% style="width: 69.75px; background-color: rgb(79, 129, 189); color: white;" %)Register Length high|=(% style="width: 69.75px; background-color: rgb(79, 129, 189); color: white;" %)Register Length low|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
449 |(% style="width:71px" %)0X10|(% style="width:74px" %)0X06|(% style="width:67px" %)0X00|(% style="width:68px" %)0X10|(% style="width:69px" %)0X00|(% style="width:66px" %)0X64|(% style="width:57px" %)0X8A|(% style="width:57px" %)(((
450 0XA5
451 )))
452
453 Change the intercept of the sensor at address 10 to 1 (default is 0). You need to pass the intercept 1*100 =100 into the command 0x006.
454
455 **response:**
456
457 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
458 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 high
459 |(% style="width:99px" %)0X10|(% style="width:112px" %)0X06|(% style="width:135px" %)(((
460 0X00
461 )))|(% style="width:126px" %)0X10|(% style="width:85px" %)0X00|(% style="width:1px" %)0X64|(% style="width:1px" %)0X8A|(% style="width:1px" %)(((
462 0XA5
463 )))
464
465 === 2.6.4 Query data ===
466
467
468 Query the data (PH) of the sensor (address 10), host → slave
469
470 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
471 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 74px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 75px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
472 |(% style="width:99px" %)0X10|(% style="width:74px" %)0X03|(% style="width:75px" %)0X00|(% style="width:68px" %)0X00|(% style="width:70px" %)0X00|(% style="width:72px" %)0X01|(% style="width:56px" %)0X87|(% style="width:56px" %)0X4B
473
474 If the sensor receives correctly, the following data will be returned, slave → host
475
476 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
477 |=(% style="width: 44px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
478 |(% style="width:99px" %)0X10|(% style="width:72px" %)0X03|(% style="width:68px" %)0X02|(% style="width:70px" %)0X02|(% style="width:72px" %)0XAE|(% style="width:56px" %)0XC4|(% style="width:56px" %)0X9B
479
480 The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
481
482 For example, the returned data is 10 03 02 (% style="color:red" %)**02 AE**(%%) C4 9B.
483
484 02 AE is the pH value, which is converted into decimal to get 686, and then two decimal places are added to get the actual value. 02 AE means the current pH value is 6.86.
485
486
487 === 2.6.5 Calibration Method ===
488
489
490 This device uses three-point calibration, and three known pH standard solutions need to be prepared.
491
492 (% style="color:blue" %)**The calibration steps are as follows:**
493
494 (1) Place the electrode in distilled water to clean it, and then place it in 9.18 standard buffer solution. After the data stabilizes, enter the following calibration command, and the 9.18 calibration is completed.
495
496 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
497 |=(% style="width: 61px; background-color: rgb(79, 129, 189); color: white;" %)Address|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
498 |(% style="width:64px" %)0X10|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
499 0X00
500 )))|(% style="width:68px" %)0X20|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0X8A|(% style="width:55px" %)(((
501 0XF1
502 )))
503
504 (2) Wash the electrode in distilled water and place it in 6.86 standard buffer. After the data stabilizes, enter the following calibration command. The 6.86 calibration is completed.
505
506 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
507 |=(% style="width: 61px; background-color: rgb(79, 129, 189); color: white;" %)Address|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
508 |(% style="width:64px" %)0X10|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
509 0X00
510 )))|(% style="width:68px" %)0X21|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0XDB|(% style="width:55px" %)(((
511 0X31
512 )))
513
514 (3) Wash the electrode in distilled water and place it in 4.01 standard buffer. After the data stabilizes, enter the following calibration command, and the 4.00 calibration is completed.
515
516 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
517 |=(% style="width: 61px; background-color: rgb(79, 129, 189); color: white;" %)Address|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
518 |(% style="width:64px" %)0X10|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
519 0X00
520 )))|(% style="width:68px" %)0X22|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0X2B|(% style="width:55px" %)(((
521 0X31
522 )))
523
524 After the above three steps are completed, the calibration is successful. The advantage of three-point calibration compared to two-point calibration is that the electrode is calibrated separately in the acid and alkali parts, thereby achieving accurate calibration of the full range and making the measurement data more accurate.
525
526
527 = 3. DR-ORP1 Water ORP Sensor =
528
529 == 3.1 Specification ==
530
531
532 * **Power Input**: DC7~~30
533
534 * **Measuring range**:** **-1999~~1999mV
535
536 * **Resolution**: 1mV
537
538 * **Interface**: RS485. 9600 Baud Rate
539
540 * **Measurement error**: ±3mV
541
542 * **Stability**: ≤2mv/24 hours
543
544 * **Working environment:**
545 ** Ambient Temperature: 0–60°C
546 ** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
547
548 * **IP Rated**: IP68
549
550 * **Max Pressure**: 0.6MPa
551
552 == 3.2 Wiring ==
553
554
555 [[image:image-20240720172620-3.png||height="378" width="620"]]
556
557
558 == 3.3 Mechinical Drawing ==
559
560
561 [[image:image-20240714174241-2.png]]
562
563
564 == 3.4 Installation Notice ==
565
566
567 Do not power on while connect the cables. Double check the wiring before power on.
568
569 **Installation Photo as reference:**
570
571 (% style="color:blue" %)** Submerged installation:**
572
573 The lead wire of the equipment passes through the waterproof pipe, and the 3/4 thread on the top of the equipment is connected to the 3/4 thread of the waterproof pipe with raw tape. Ensure that the top of the equipment and the equipment wire are not flooded.
574
575 [[image:image-20240718191348-6.png]]
576
577 (% style="color:blue" %)** Pipeline installation:**
578
579 Connect the equipment to the pipeline through the 3/4 thread.
580
581 [[image:image-20240718191336-5.png||height="239" width="326"]]
582
583
584 == 3.5 Maintenance ==
585
586
587 (1) The equipment itself generally does not require daily maintenance. When an obvious fault occurs, please do not open it and repair it yourself, and contact us as soon as possible.
588
589 (2) In general, ORP electrodes do not need to be calibrated and can be used directly. When there is doubt about the quality and test results of the ORP electrode, the electrode potential can be checked with an ORP standard solution to determine whether the ORP electrode meets the measurement requirements, and the electrode can be recalibrated or replaced with a new ORP electrode. The frequency of calibration or inspection of the measuring electrode depends on different application conditions (the degree of dirt in the application, the deposition of chemical substances, etc.).
590
591 (3) There is an appropriate soaking solution in the protective bottle at the front end of the electrode, and the electrode head is soaked in it to ensure the activation of the platinum sheet and the liquid junction. When measuring, loosen the bottle cap, pull out the electrode, and rinse it with pure water before use.
592
593 (4) Preparation of electrode soaking solution: Take 25 grams of analytical pure potassium chloride and dissolve it in 100 ml of pure water to prepare a 3.3M potassium chloride solution.
594
595 (5) Before measuring, the bubbles in the electrode glass bulb should be shaken off, otherwise it will affect the measurement. When measuring, the electrode should be stirred in the measured solution and then placed still to accelerate the response.
596
597 (6) The electrode should be cleaned with deionized water before and after the measurement to ensure the measurement accuracy.
598
599 (7) After long-term use, the ORP electrode will be passivated, which is manifested as a decrease in sensitivity gradient, slow response, and inaccurate readings. At this time, the platinum sheet at the bottom of the electrode can be soaked in 0.1M dilute hydrochloric acid for 24 hours (0.1M dilute hydrochloric acid preparation: 9 ml of hydrochloric acid is diluted to 1000 ml with distilled water), and then soaked in 3.3M potassium chloride solution for 24 hours to restore its performance.
600
601 (8) Electrode contamination or liquid junction blockage can also cause electrode passivation. At this time, it should be cleaned with an appropriate solution according to the nature of the contaminant. If the platinum of the electrode is severely contaminated and an oxide film is formed, toothpaste can be applied to the platinum surface and then gently scrubbed to restore the platinum's luster.
602
603 (9) The equipment should be calibrated before each use. It is recommended to calibrate once every 3 months for long-term use. The calibration frequency should be adjusted appropriately according to different application conditions (degree of dirt in the application, deposition of chemical substances, etc.). After aging, the electrodes should be replaced in time.
604
605
606 == 3.6 RS485 Commands ==
607
608
609 RS485 signaldefault address 0x13
610 Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
611
612
613 === 3.6.1 Query address ===
614
615
616 **send:**
617
618 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
619 |=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)CRC16 high
620 |(% style="width:99px" %)0XFE |(% style="width:112px" %)0X03|(% style="width:135px" %)0X00|(% style="width:126px" %)0X50|(% style="width:85px" %)0X00|(% style="width:1px" %)0X00|(% style="width:1px" %)0X51|(% style="width:1px" %)0XD4
621
622 **response:**
623
624 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
625 |=(% style="width: 103.6px;background-color:#4F81BD;color:white" %)New address|=(% style="width: 103.6px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
626 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
627
628 === 3.6.2 Change address ===
629
630
631 For example: Change the address of the sensor with address 1 to 2, master → slave
632
633 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
634 |=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)CRC16 high
635 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X50|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0X08|(% style="width:1px" %)0X1A
636
637 If the sensor receives correctly, the data is returned along the original path.
638
639 (% style="color:red" %)**Note: If you forget the original address of the sensor, you can use the broadcast address 0XFE instead. When using 0XFE, the host can only connect to one slave, and the return address is still the original address, which can be used as a method of address query.**
640
641
642 === 3.6.3 Modify intercept ===
643
644
645 **send:**
646
647 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
648 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address  low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register Length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register Length low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 high
649 |(% style="width:99px" %)0X13|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X10|(% style="width:85px" %)0X00|(% style="width:1px" %)0X64|(% style="width:1px" %)0X8A|(% style="width:1px" %)(((
650 0X96
651 )))
652
653 Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
654
655 **response:**
656
657 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
658 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width:68px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 68px;background-color:#4F81BD;color:white" %)CRC16 high
659 |(% style="width:99px" %)0X13|(% style="width:112px" %)0X06|(% style="width:135px" %)(((
660 0X00
661 )))|(% style="width:126px" %)0X10|(% style="width:85px" %)0X00|(% style="width:1px" %)0X64|(% style="width:1px" %)0X8A|(% style="width:1px" %)(((
662 0X96
663 )))
664
665 === 3.6.4 Query data ===
666
667
668 Query the data (ORP) of the sensor (address 13), host → slave
669
670 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
671 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
672 |(% style="width:99px" %)0X13|(% style="width:72px" %)0X03|(% style="width:64px" %)0X00|(% style="width:68px" %)0X00|(% style="width:70px" %)0X00|(% style="width:72px" %)0X01|(% style="width:56px" %)0X87|(% style="width:56px" %)0X78
673
674 If the sensor receives correctly, the following data will be returned, slave → host
675
676 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
677 |=(% style="width: 44px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
678 |(% style="width:99px" %)0X13|(% style="width:72px" %)0X03|(% style="width:68px" %)0X02|(% style="width:70px" %)0X02|(% style="width:72px" %)0XAE|(% style="width:56px" %)0X80|(% style="width:56px" %)0X9B
679
680 The query data command is 13 03 00 00 00 01 87 78
681
682 For example, the returned data is 13 03 02 (% style="color:red" %)**02 AE**(%%) 80 9B.
683
684 02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
685
686
687 === 3.6.5 Calibration Method ===
688
689
690 This device uses two-point calibration, and two known ORP standard solutions need to be prepared. The calibration steps are as follows:
691 (1) Place the electrode in distilled water to clean it, and then place it in 86mV standard buffer solution. After the data stabilizes,
692 enter the following calibration command, and the 86mV point calibration is completed;
693
694 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
695 |=(% style="width: 42px; background-color: rgb(79, 129, 189); color: white;" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
696 |(% style="width:64px" %)0X13|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
697 0X00
698 )))|(% style="width:68px" %)0X24|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0XCB|(% style="width:55px" %)(((
699 0X03
700 )))
701
702 Wash the electrode in distilled water and place it in 256mV standard buffer. After the data is stable, enter the following calibration command to complete the 256mV point calibration.
703
704 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
705 |=(% style="width: 42px; background-color: rgb(79, 129, 189); color: white;" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
706 |(% style="width:68px" %)0X13|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
707 0X00
708 )))|(% style="width:68px" %)0X25|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0X9A|(% style="width:55px" %)(((
709 0XC3
710 )))
711
712 = 4. DR-DO1 Dissolved Oxygen Sensor =
713
714 == 4.1 Specification ==
715
716
717 * **Measuring range**: 0-20mg/L, 0–50℃
718
719 * **Accuracy**: 3%, ±0.5℃
720
721 * **Resolution**: 0.01 mg/L, 0.01℃
722
723 * **Maximum operating pressure**: 6 bar
724
725 * **Output signal**: A: 4-20mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
726
727 * **Power supply voltage**: 5-24V DC
728
729 * **Working environment:**
730 ** Ambient Temperature: 0–60°C
731 ** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
732
733 * **Power consumption**: ≤0.5W
734
735 == 4.2 wiring ==
736
737
738 [[image:image-20240720172632-4.png||height="390" width="640"]]
739
740
741 == 4.3 Impedance requirements for current signals ==
742
743
744 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:400px" %)
745 |(% style="width:132px" %)**Supply Voltage**|(% style="width:67px" %)**9V**|(% style="width:67px" %)**12V**|(% style="width:67px" %)**20V**|(% style="width:67px" %)**24V**
746 |(% style="width:132px" %)**Max Impedance**|(% style="width:65px" %)**<250Ω**|(% style="width:67px" %)**<400Ω**|(% style="width:67px" %)**<500Ω**|(% style="width:65px" %)**<900Ω**
747
748 == 4.4 Mechinical Drawing ==
749
750
751 [[image:image-20240719155308-1.png||height="226" width="527"]]
752
753
754 == 4.5 Instructions for use and maintenance ==
755
756
757 * It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
758
759 * If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
760
761 == 4.6 RS485 Commands ==
762
763
764 RS485 signaldefault address 0x14
765 Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
766
767
768 === 4.6.1 Query address ===
769
770
771 **send:**
772
773 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
774 |=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Register address high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Register address low|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
775 |(% style="width:99px" %)0XFF|(% style="width:72px" %)0X03|(% style="width:64px" %)0X00|(% style="width:68px" %)0X0A|(% style="width:70px" %)0X00|(% style="width:72px" %)0X02|(% style="width:56px" %)0XF1|(% style="width:56px" %)0XD7
776
777 If you forget the original address of the sensor, you can use the broadcast address 0XFF instead. When using 0XFE, the host can only connect to one slave, which can be used as a method of address query.
778
779
780 **response:**
781
782 Register 0 data high and register 0 data low indicate the actual address of the sensor: 1
783 Register 1 data high and register 1 data low indicate the sensor version
784
785 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
786 |=(% style="width: 40px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data high|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 59.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
787 |(% style="width:99px" %)0XFF|(% style="width:72px" %)0X03|(% style="width:64px" %)0X04|(% style="width:68px" %)0X00|(% style="width:70px" %)0X01|(% style="width:72px" %)0X00|(% style="width:56px" %)0X00|(% style="width:56px" %)0XB4|(% style="width:56px" %)0X3C
788
789 === 4.6.2 Change address ===
790
791
792 For example: Change the address of the sensor with address 1 to 2(address range: 1-119), master → slave
793
794 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
795 |=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Original address|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Start address high|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Start address low|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Sensor version|=(% style="width: 40px; background-color: rgb(79, 129, 189); color: white;" %)Sensor version|=(% style="width: 39px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high|=(% style="width: 39px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low
796 |(% style="width:67px" %)0X01|(% style="width:71px" %)0X10|(% style="width:65px" %)0X00|(% style="width:65px" %)0X0A|(% style="width:70px" %)0X00|(% style="width:72px" %)0X02|(% style="width:53px" %)0X04|(% style="width:53px" %)0X00|(% style="width:72px" %)0X02|(% style="width:53px" %)0X00|(% style="width:53px" %)0X00|(% style="width:56px" %)0XD2|(% style="width:53px" %)0X10
797
798 **response:**
799
800 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
801 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
802 |(% style="width:99px" %)0X01|(% style="width:72px" %)0X10|(% style="width:64px" %)0X00|(% style="width:68px" %)0X0A|(% style="width:70px" %)0X00|(% style="width:72px" %)0X02|(% style="width:56px" %)0X61|(% style="width:56px" %)0XCA
803
804 === 4.6.3 Query data ===
805
806
807 Query the data (dissolved oxygen) of the sensor (address 14), host → slave
808
809 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
810 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
811 |(% style="width:99px" %)0X14|(% style="width:72px" %)0X03|(% style="width:64px" %)0X00|(% style="width:68px" %)0X14|(% style="width:70px" %)0X00|(% style="width:72px" %)0X01|(% style="width:56px" %)0XC6|(% style="width:56px" %)0XCB
812
813 If the sensor receives correctly, the following data will be returned, slave → host
814
815 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
816 |=(% style="width: 44px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
817 |(% style="width:99px" %)0X14|(% style="width:72px" %)0X03|(% style="width:68px" %)0X02|(% style="width:70px" %)0X03|(% style="width:72px" %)0X78|(% style="width:56px" %)0XB5|(% style="width:56px" %)0X55
818
819 After the query, 7 bytes will be returned. For example, the returned data is 14 03 02 (% style="color:red" %)**03 78**(%%) B5 55. 03 78 is the value of dissolved oxygen.
820
821 Converted to decimal, it is 888. Add two decimal places to get the actual value. 03 78 means the current dissolved oxygen is 8.88mg/L
822
823
824 Query the data (temperature) of the sensor (address 14), host → slave
825
826 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
827 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
828 |(% style="width:99px" %)0X14|(% style="width:72px" %)0X03|(% style="width:64px" %)0X00|(% style="width:68px" %)0X11|(% style="width:70px" %)0X00|(% style="width:72px" %)0X01|(% style="width:56px" %)0XD6|(% style="width:56px" %)0XCA
829
830 If the sensor receives correctly, the following data will be returned, slave → host
831
832 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
833 |=(% style="width: 44px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
834 |(% style="width:99px" %)0X14|(% style="width:72px" %)0X03|(% style="width:68px" %)0X02|(% style="width:70px" %)0X09|(% style="width:72px" %)0XA4|(% style="width:56px" %)0XB2|(% style="width:56px" %)0X6C
835
836 After the query, 7 bytes will be returned. For example, the returned data is 14 03 02 (% style="color:red" %)**09 A4**(%%) B2 6C. 03 78 is the value of dissolved oxygen temperature.
837
838 Converted to decimal, it is 2468. Add two decimal places to get the actual value. 09 A4 means the current dissolved oxygen temperature is 24.68°C
839
840
841 = 5. DR-TS1 Water Turbidity Sensor =
842
843 == 5.1 Specification ==
844
845
846 * **Measuring range**: 0.1~~1000.0NTU
847
848 * **Accuracy**: ±5%
849
850 * **Resolution**: 0.1NTU
851
852 * **Stability**: ≤3mV/24 hours
853
854 * **Output signal**: RS485 (standard Modbus-RTU protocol, device default address: 01)
855
856 * **Power supply voltage**: 5~~24V DC (when output signal is RS485), 12~~24V DC (when output signal is 4~~20mA)
857
858 * **Working environment:**
859 ** Ambient Temperature: 0–60°C
860 ** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
861
862 * **Power consumption**: ≤ 0.5W
863
864 == 5.2 wiring ==
865
866
867 [[image:image-20240720172640-5.png||height="387" width="635"]]
868
869
870 == 5.3 Impedance requirements for current signals ==
871
872
873 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:400px" %)
874 |(% style="width:132px" %)**Supply Voltage**|(% style="width:67px" %)**9V**|(% style="width:67px" %)**12V**|(% style="width:67px" %)**20V**|(% style="width:67px" %)**24V**
875 |(% style="width:132px" %)**Max Impedance**|(% style="width:65px" %)**<250Ω**|(% style="width:67px" %)**<400Ω**|(% style="width:67px" %)**<500Ω**|(% style="width:65px" %)**<900Ω**
876
877 == 5.4 Mechinical Drawing ==
878
879
880 [[image:image-20240718195058-7.png||height="305" width="593"]]
881
882
883 == 5.5 Instructions for use and maintenance ==
884
885
886 * It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
887
888 * If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
889
890 == 5.6 RS485 Commands ==
891
892
893 RS485 signaldefault address 0x15
894 Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
895
896
897 === 5.6.1 Query address ===
898
899
900 **send:**
901
902 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
903 |=(% style="width: 80.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 54.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 58.75px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
904 |(% style="width:99px" %)0XFE |(% style="width:64.75px" %)0X03|(% style="width:64px" %)0X00|(% style="width:64.75px" %)0X50|(% style="width:70px" %)0X00|(% style="width:72px" %)0X00|(% style="width:56px" %)0X51|(% style="width:56px" %)0XD4
905
906 If you forget the original address of the sensor, you can use the broadcast address 0XFE instead. When using 0XFE, the host can only connect to one slave, which can be used as a method of address query.
907
908
909 **response:**
910
911 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
912 |=(% style="width: 103.6px;background-color:#4F81BD;color:white" %)New address|=(% style="width: 103.6px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 103.6px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
913 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
914
915 === 5.6.2 Change address ===
916
917
918 For example: Change the address of the sensor with address 1 to 2, master → slave
919
920 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
921 |=(% style="width: 80.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 54.75px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 58.75px;background-color:#4F81BD;color:white" %)CRC16 high
922 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X50|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0X08|(% style="width:1px" %)0X1A
923
924 If the sensor receives correctly, the data is returned along the original path.
925
926 (% style="color:red" %)**Note: If you forget the original address of the sensor, you can use the broadcast address 0XFE instead. When using 0XFE, the host can only connect to one slave, and the return address is still the original address, which can be used as a method of address query.**
927
928
929 === 5.6.3 Query data ===
930
931
932 Query the data (turbidity) of the sensor (address 15), host → slave
933
934 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
935 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register length low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
936 |(% style="width:99px" %)0X15|(% style="width:72px" %)0X03|(% style="width:64px" %)0X00|(% style="width:68px" %)0X00|(% style="width:70px" %)0X00|(% style="width:72px" %)0X01|(% style="width:56px" %)0X87|(% style="width:56px" %)0X1E
937
938 If the sensor receives correctly, the following data will be returned, slave → host
939
940 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
941 |=(% style="width: 44px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
942 |(% style="width:99px" %)0X15|(% style="width:72px" %)0X03|(% style="width:68px" %)0X02|(% style="width:70px" %)0X02|(% style="width:72px" %)0X9A|(% style="width:56px" %)0X09|(% style="width:56px" %)0X4C
943
944 The query data command is 15 03 00 00 00 01 87 1E
945
946 For example, the returned data is 15 03 02 (% style="color:red" %)**02 9A**(%%) 09 4C
947
948 02 9A is the turbidity value, converted to decimal, it is 666, and then divided by 10, the actual value is 66.6, 02 9A means the current turbidity value is 66.6 NTU
949
950
951 = 6. DR-CL Water CL Probe =
952
953 == 6.1 Specification: ==
954
955 * **Power Input**: DC7~~30
956
957 * **Power Consumption** : 0.19W
958
959 * **Interface**: RS485. 9600 Baud Rate
960
961 * **CL Range & Resolution:**
962 ** **CL2ML:**0-2mg/L
963 ** **CL10ML:**0-10mg/L
964 ** **Resolution:**0.01mg/L
965
966 * **CL Accuracy**: ±5% FS
967 * **Temperature Accuracy: **±0.5 °C
968 * **Working environment:**
969 ** Ambient Temperature: 0–50°C
970 ** pH:4-9
971 ** Flow rate: 30L/h~~60L/h (flow tank installation)
972 * **IP Rated**: IP68
973
974 * **Max Pressure**: 0.6MPa
975
976 == 6.2 Wiring ==
977
978 [[image:image-20240720172548-2.png||height="348" width="571"]]
979
980 == 6.3 Mechinical Drawing ==
981
982 [[image:1752573238705-910.png||height="694" width="278"]]
983
984 == 6.4 Installation ==
985
986 Flow-through installation: Use the matching flow slot for installation. The device and the flow slot are installed tightly.
987
988 The measuring end is completely immersed in the measured liquid to ensure a steady flow rate without bubbles.
989
990 It is recommended that the flow rate be controlled at 30-60Lh to ensure the accuracy of the test.
991
992 [[image:1752573643879-991.png||height="360" width="343"]]
993
994 == 6.5 Maintenance ==
995
996 * The device itself generally does not require daily maintenance. When an obvious fault occurs, please do not open it and repair it yourself, and contact us as soon as possible!
997 * After using the electrode, please clean the electrode head with clean water and cover it with a protective cover.
998 * When measuring the device, the measured liquid should flow and the flow rate should be uniform, and there should be no bubbles attached to the measuring end of the device.
999 * If the electrode diaphragm is attached with dirt and mineral components, the sensitivity will be reduced, and it may not be possible to perform sufficient measurement. Please ensure that the platinum ring is clean.
1000 * The platinum induction ring of a good residual chlorine electrode should always be kept clean and bright. If the platinum ring of the electrode becomes rough or covered with pollutants after measurement, please clean it according to the following method: (For reference) Inorganic pollution: immerse the electrode in 0.1mol/L dilute hydrochloric acid for 15 minutes, gently wipe the platinum ring of the residual chlorine electrode with a cotton swab, and then wash it with tap water.
1001 * Organic or oil pollution: immerse the electrode in tap water with a small amount of detergent, such as dishwashing liquid, and thoroughly clean the sensing surface of the electrode sensor. Gently wipe the platinum ring of the electrode with a cotton swab, then rinse with tap water, and the cleaning is complete. If the platinum ring of the electrode has formed an oxide film, please use toothpaste or 1000-grit fine sandpaper to properly polish the sensing surface, and then clean it with tap water. The platinum ring is connected to the glass, so please handle it carefully when polishing.
1002 The electrode has a service life of about one year, and a new electrode should be replaced in time after aging.
1003 * Before the cable plug and the device plug are locked, do not put the plug part into water.
1004
1005
1006
1007 == 6.6 RS485 Commands ==
1008
1009 RS485 signal 
1010 Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
1011
1012
1013 == 6.7 Query data ==
1014
1015 Example 1: Read the current residual chlorine concentration of the device with address 01
1016
1017 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:534.333px" %)
1018 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 53px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 74px; background-color: rgb(79, 129, 189); color: white;" %)Register Address|=(% style="width: 94px; background-color: rgb(79, 129, 189); color: white;" %)Register length|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 77px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
1019 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:74px" %)0X00 0X00|(% style="width:94px" %)0X00 0X01|(% style="width:72px" %)(((
1020 0X84
1021 )))|(% style="width:77px" %)0X0A
1022
1023 **response:**
1024
1025 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:534.333px" %)
1026 |=(% style="width: 42px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 83px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 110px; background-color: rgb(79, 129, 189); color: white;" %)Valid Bytes|=(% style="width: 94px; background-color: rgb(79, 129, 189); color: white;" %)Register contents|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 77px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
1027 |(% style="width:99px" %)0X01|(% style="width:83px" %)0X03|(% style="width:110px" %)0X02|(% style="width:94px" %)0X03 0X16|(% style="width:72px" %)(((
1028 0X39
1029 )))|(% style="width:77px" %)0X7A
1030
1031 Calculation of residual chlorine concentration: 316H (hexadecimal) = 790 => residual chlorine = 7.90
1032
1033
1034 Example 2: Set the deviation value for the current residual chlorine value of the device with address 01 to correct the value and send the frame: (If the current residual gas value output by the device is 7.90, the value needs to be corrected to 8.00, the difference is 8.00-7.90-0.100.1*100=10=>41200000 (floating point number), write 41200000 to the contents of the two registers)
1035
1036 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
1037 |=(% style="width: 80.75px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 64.75px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 64.75px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 54.75px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 58.75px;background-color:#4F81BD;color:white" %)CRC16 high
1038 |(% style="width:99px" %)0X01|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X50|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0X08|(% style="width:1px" %)0X1A
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054 = 7.  Water Quality Sensor Datasheet =
1055
1056 * **[[Water Quality Sensor Transmitter Datasheet>>https://www.dropbox.com/scl/fi/9tofocmgapkbddshznumn/Datasheet_WQS-xB-WQS-xS_Water-Quality-Sensor-Transmitter.pdf?rlkey=wxua12ur9swk30rkqnh2boo9z&st=axga6epf&dl=0]]**