Wiki source code of Water Quality Sensors

Version 62.6 by Karry Zhuang on 2025/07/15 17:33

version	line-number	content
1.1	1	Table of Contents:
	2
62.3	3	{{toc/}}
1.1	4
	5
45.2	6
	7
7.1	8	= 1. DR-ECK Water EC Probe =
	9
	10	== 1.1 Specification: ==
	11
45.2	12
7.1	13	* Power Input: DC7~~30
45.63	14
7.1	15	* Power Consumption : < 0.5W
45.63	16
7.1	17	* Interface: RS485. 9600 Baud Rate
45.63	18
7.1	19	* EC Range & Resolution:
	20	ECK0.01** : 0.02 ~~ 20 μS/cm
	21	ECK0.1**: 0.2 ~~ 200.0 μS/cm
48.1	22	ECK1.0** : 0 ~~ 2,000 μS/cm Resolution: 1 μS/cm
	23	ECK10.0** : 10 ~~ 20,000 μS/cm Resolution: 10 μS/cm
59.2	24	ECK200.0** : 1 ~~ 200,000 μS/cm Resolution: 1 μS/cm
45.63	25
7.1	26	* EC Accuracy: ±1% FS
	27	* Temperature Accuracy: ±0.5 °C
59.1	28	* Working environment:
	29	** Ambient Temperature: 0–60°C
	30	** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
60.2	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
7.1	32	* IP Rated: IP68
45.63	33
7.1	34	* Max Pressure: 0.6MPa
	35
	36	== 1.2 Application for Different Range ==
	37
45.2	38
62.3	39	[[image:image-20240714173018-1.png]]
7.1	40
	41
	42	== 1.3 Wiring ==
	43
45.2	44
62.3	45	[[image:image-20241129142314-1.png\|\|height="352" width="1108"]]
7.1	46
45.1	47
7.1	48	== 1.4 Mechinical Drawing ==
	49
60.6	50	ECK1 and ECK10 ECK200
45.2	51
7.1	52
62.3	53	[[image:image-20240714174241-2.png]] [[image:1752564223905-283.png\|\|height="399" width="160"]]
7.1	54
60.4	55
7.1	56	== 1.5 Installation ==
	57
	58
45.2	59	Electrode installation form:
15.2	60
45.2	61	A: Side wall installation
15.2	62
45.2	63	B: Top flange installation
15.2	64
45.2	65	C: Pipeline bend installation
15.2	66
45.2	67	D: Pipeline bend installation
15.2	68
45.2	69	E: Flow-through installation
15.2	70
45.2	71	F: Submerged installation
15.2	72
62.3	73	[[image:image-20240718190121-1.png\|\|height="350" width="520"]]
15.2	74
18.1	75	Several common installation methods of electrodes
15.2	76
18.1	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.
15.2	78
18.1	79	A. Several common incorrect installation methods
15.2	80
62.3	81	[[image:image-20240718190204-2.png\|\|height="262" width="487"]]
15.2	82
45.2	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.
15.2	84
62.3	85	[[image:image-20240718190221-3.png\|\|height="292" width="500"]]
18.1	86
45.2	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.
18.1	88
	89	B. Correct installation method
	90
62.3	91	[[image:image-20240718190249-4.png\|\|height="287" width="515"]]
18.1	92
	93
38.1	94	== 1.6 Maintenance ==
7.1	95
	96
26.1	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.
45.66	98
26.1	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.
45.66	100
26.1	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.
45.66	102
26.1	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.).
15.2	104
8.1	105	== 1.7 RS485 Commands ==
	106
15.2	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
16.1	112	=== 1.7.1 Query address ===
8.1	113
11.1	114
45.48	115	send:
45.2	116
	117	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.40	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
45.32	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
16.1	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
45.48	124	response:
16.1	125
45.14	126	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
45.10	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
27.1	128	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
16.1	129
60.8	130
	131
16.1	132	=== 1.7.2 Change address ===
	133
45.2	134
16.1	135	For example: Change the address of the sensor with address 1 to 2, master → slave
	136
45.20	137	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.39	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
45.32	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
16.1	140
	141	If the sensor receives correctly, the data is returned along the original path.
	142
45.32	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.
16.1	144
45.32	145
16.1	146	=== 1.7.3 Modify intercept ===
	147
	148
45.48	149	send:
16.1	150
45.36	151	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
45.34	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" %)(((
27.1	154	0X07
16.1	155	)))
	156
	157	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	158
45.48	159	response:
16.1	160
45.36	161	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
45.35	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
16.1	163	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	164	0X02
27.1	165	)))\|(% style="width:126px" %)0X00\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X0A\|(% style="width:1px" %)0X38\|(% style="width:1px" %)(((
	166	0X8F
16.1	167	)))
	168
	169	=== 1.7.4 Query data ===
	170
37.1	171
	172	Query the data (EC,temperature) of the sensor (address 11), host → slave
	173
45.20	174	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.43	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
37.1	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
45.20	180	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.42	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
37.1	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
16.3	184	The address of the EC K10 sensor is 11
16.1	185
10.1	186	The query data command is 11 03 00 00 00 02 C6 9B
	187
45.48	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.
10.1	189
	190
37.1	191	Query the data (EC,temperature) of the sensor (address 11), host → slave
	192
45.20	193	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.44	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
37.1	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
45.20	199	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.44	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
37.1	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
10.1	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
45.48	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.
10.1	208
11.1	209
60.10	210	ECK200
	211
16.2	212	=== 1.7.5 Calibration Method ===
12.1	213
61.2	214	ECK1 and ECK10.0
12.1	215
15.1	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.
12.1	217
45.63	218	(% style="color:blue" %)The calibration steps are as follows:
	219
15.1	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
45.20	222	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.47	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
14.1	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
15.1	231	1413*10 gives 0X00003732
14.1	232
45.48	233	response:
15.1	234
45.20	235	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.45	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
14.1	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
45.20	241	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.47	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
14.1	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
15.1	250	12880*10 gives 0X01F720
	251
45.48	252	response:
14.1	253
45.20	254	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.45	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
14.1	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
61.2	258
	259
62.3	260	EC200.0
61.2	261
62.2	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 00 01, 00 00, 05 85 to 0x0120, 0x0121, 0x0122 respectively.
61.2	263
61.3	264	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
62.2	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" %)(((
61.8	267	0X00
61.7	268	0X01
61.3	269	0X00
	270	0X00
61.9	271	0X05
	272	0X85
62.3	273	)))\|(% style="width:1px" %)0X1c\|(% style="width:1px" %)(((
62.1	274	(((
62.2	275	0X25
62.1	276	)))
62.2	277	)))
62.1	278
62.2	279	response:
	280
	281	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
62.3	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: 53px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
62.2	283	\|(% 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" %)(((
	284	0X80
62.3	285	)))\|(% style="width:1px" %)0X3e
	286
	287
	288
	289	Use 111310uS/cm standard solution to calibrate the second point
	290	Send frame: 111310 is converted into hexadecimal 1b2ce, and 0002, 0001 are written to 0x0120, 0x0121, and 0x0122 respectively.
	291
	292	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
	293	\|=(% 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
	294	\|(% 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" %)(((
	295	0X00
	296	0X02
	297	0X00
	298	0X01
	299	0Xb2
	300	0Xce
62.2	301	)))\|(% style="width:1px" %)0X3e\|(% style="width:1px" %)(((
62.1	302	(((
62.3	303	0X22
62.1	304	)))
62.3	305
	306
62.2	307	)))
61.3	308
62.3	309	response:
	310
	311	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
	312	\|=(% 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: 53px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	313	\|(% 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" %)(((
	314	0X80
	315	)))\|(% style="width:1px" %)0X3e
	316
8.1	317	= 2. DR-PH01 Water PH Sensor =
	318
28.2	319	== 2.1 Specification ==
9.1	320
45.20	321
26.1	322	* Power Input: DC7~~30
45.62	323
26.1	324	* Power Consumption : < 0.5W
45.62	325
26.1	326	* Interface: RS485. 9600 Baud Rate
45.62	327
26.1	328	* pH measurement range: 0~~14.00pH; resolution: 0.01pH
45.62	329
	330	* pH measurement error: ±0.15pH
	331
	332	* Repeatability error: ±0.02pH
	333
	334	* Temperature measurement range:0~~60°C; resolution: 0.1°C (set temperature for manual temperature compensation, default 25°C)
	335
	336	* Temperature measurement error: ±0.5°C
	337
59.1	338	* Working environment:
	339	** Ambient Temperature: 0–60°C
	340	** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
45.62	341
26.1	342	* Temperature Accuracy: ±0.5 °C
45.62	343
26.1	344	* IP Rated: IP68
45.62	345
26.1	346	* Max Pressure: 0.6MPa
	347
	348	== 2.2 Wiring ==
	349
45.49	350
62.3	351	[[image:image-20240720172548-2.png\|\|height="348" width="571"]]
26.1	352
45.1	353
45.62	354	== 2.3 Mechinical Drawing ==
26.1	355
45.49	356
62.3	357	[[image:image-20240714174241-2.png]]
26.1	358
	359
	360	== 2.4 Installation Notice ==
	361
45.49	362
26.1	363	Do not power on while connect the cables. Double check the wiring before power on.
	364
	365	Installation Photo as reference:
	366
45.50	367	(% style="color:blue" %)Submerged installation:
26.1	368
	369	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.
	370
62.3	371	[[image:image-20240718191348-6.png]]
26.1	372
45.50	373	(% style="color:blue" %)Pipeline installation:
26.1	374
	375	Connect the equipment to the pipeline through the 3/4 thread.
	376
62.3	377	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
26.1	378
45.50	379	(% style="color:blue" %)Sampling:
26.1	380
	381	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.
	382
45.50	383	(% style="color:blue" %)Measure the pH of the water sample:
26.1	384
	385	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.
	386
	387
39.1	388	== 2.5 Maintenance ==
26.1	389
	390
	391	* 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!
45.62	392
26.1	393	* 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.
45.62	394
26.1	395	* 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.
45.62	396
26.1	397	* 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.
45.62	398
26.1	399	* 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.
45.62	400
26.1	401	* The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
45.62	402
26.1	403	* 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.
45.62	404
26.1	405	* 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.
	406
45.62	407	* 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.
	408
26.1	409	== 2.6 RS485 Commands ==
	410
45.51	411
27.1	412	RS485 signaldefault address 0x10
	413	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
26.1	414
45.51	415
33.2	416	=== 2.6.1 Query address ===
27.1	417
45.51	418
45.52	419	send:
27.1	420
45.52	421	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.53	422	\|=(% 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
27.1	423	\|(% 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
	424
45.52	425	response:
27.1	426
45.52	427	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.57	428	\|=(% 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
27.1	429	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	430
	431	=== 2.6.2 Change address ===
	432
45.52	433
27.1	434	For example: Change the address of the sensor with address 1 to 2, master → slave
	435
45.52	436	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.57	437	\|=(% 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
27.1	438	\|(% 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
	439
	440	If the sensor receives correctly, the data is returned along the original path.
	441
45.52	442	(% 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.
27.1	443
45.52	444
27.1	445	=== 2.6.3 Modify intercept ===
	446
	447
45.52	448	send:
27.1	449
45.52	450	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.56	451	\|=(% 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
34.3	452	\|(% 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" %)(((
27.1	453	0XA5
	454	)))
	455
34.4	456	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.
27.1	457
45.52	458	response:
27.1	459
45.52	460	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.55	461	\|=(% 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
27.1	462	\|(% style="width:99px" %)0X10\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	463	0X00
	464	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	465	0XA5
	466	)))
	467
	468	=== 2.6.4 Query data ===
	469
	470
34.3	471	Query the data (PH) of the sensor (address 10), host → slave
9.1	472
45.52	473	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.59	474	\|=(% 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
34.3	475	\|(% style="width:99px" %)0X10\|(% 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" %)0X4B
	476
	477	If the sensor receives correctly, the following data will be returned, slave → host
	478
45.75	479	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.61	480	\|=(% 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
35.1	481	\|(% 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
34.3	482
11.1	483	The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
10.1	484
11.1	485	For example, the returned data is 10 03 02 (% style="color:red" %)02 AE(%%) C4 9B.
	486
	487	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.
	488
	489
27.1	490	=== 2.6.5 Calibration Method ===
	491
	492
	493	This device uses three-point calibration, and three known pH standard solutions need to be prepared.
45.62	494
	495	(% style="color:blue" %)The calibration steps are as follows:
	496
27.1	497	(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.
	498
45.52	499	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.68	500	\|=(% 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
27.1	501	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	502	0X00
	503	)))\|(% style="width:68px" %)0X20\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X8A\|(% style="width:55px" %)(((
	504	0XF1
	505	)))
	506
	507	(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.
	508
45.52	509	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.68	510	\|=(% 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
27.1	511	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	512	0X00
	513	)))\|(% style="width:68px" %)0X21\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XDB\|(% style="width:55px" %)(((
	514	0X31
	515	)))
	516
	517	(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.
	518
45.52	519	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.68	520	\|=(% 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
27.1	521	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	522	0X00
	523	)))\|(% style="width:68px" %)0X22\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X2B\|(% style="width:55px" %)(((
	524	0X31
	525	)))
	526
	527	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.
	528
	529
8.1	530	= 3. DR-ORP1 Water ORP Sensor =
	531
28.2	532	== 3.1 Specification ==
27.2	533
45.75	534
27.2	535	* Power Input: DC7~~30
45.69	536
32.1	537	* Measuring range: -1999~~1999mV
45.69	538
45.70	539	* Resolution: 1mV
45.69	540
27.2	541	* Interface: RS485. 9600 Baud Rate
45.69	542
27.2	543	* Measurement error: ±3mV
45.69	544
27.2	545	* Stability: ≤2mv/24 hours
45.69	546
59.1	547	* Working environment:
	548	** Ambient Temperature: 0–60°C
	549	** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
45.69	550
27.2	551	* IP Rated: IP68
45.69	552
27.2	553	* Max Pressure: 0.6MPa
	554
	555	== 3.2 Wiring ==
	556
45.75	557
62.3	558	[[image:image-20240720172620-3.png\|\|height="378" width="620"]]
27.2	559
45.1	560
27.2	561	== 3.3 Mechinical Drawing ==
	562
45.75	563
62.3	564	[[image:image-20240714174241-2.png]]
27.2	565
45.77	566
27.2	567	== 3.4 Installation Notice ==
	568
45.75	569
27.2	570	Do not power on while connect the cables. Double check the wiring before power on.
	571
45.75	572	Installation Photo as reference:
27.2	573
45.70	574	(% style="color:blue" %) Submerged installation:
27.2	575
	576	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.
	577
62.3	578	[[image:image-20240718191348-6.png]]
27.2	579
45.70	580	(% style="color:blue" %) Pipeline installation:
27.2	581
	582	Connect the equipment to the pipeline through the 3/4 thread.
	583
62.3	584	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
27.2	585
	586
39.1	587	== 3.5 Maintenance ==
8.1	588
9.1	589
29.1	590	(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.
32.3	591
29.1	592	(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.).
32.3	593
29.1	594	(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.
32.3	595
29.1	596	(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.
32.3	597
29.1	598	(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.
32.3	599
29.1	600	(6) The electrode should be cleaned with deionized water before and after the measurement to ensure the measurement accuracy.
32.3	601
29.1	602	(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.
32.3	603
29.1	604	(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.
32.3	605
29.1	606	(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.
	607
45.75	608
29.1	609	== 3.6 RS485 Commands ==
	610
	611
	612	RS485 signaldefault address 0x13
	613	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	614
45.75	615
33.2	616	=== 3.6.1 Query address ===
29.1	617
	618
45.75	619	send:
	620
45.69	621	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.71	622	\|=(% 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
29.1	623	\|(% 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
	624
45.75	625	response:
29.1	626
45.69	627	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.71	628	\|=(% 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
29.1	629	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	630
	631	=== 3.6.2 Change address ===
	632
45.75	633
29.1	634	For example: Change the address of the sensor with address 1 to 2, master → slave
	635
45.71	636	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.72	637	\|=(% 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
29.1	638	\|(% 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
	639
	640	If the sensor receives correctly, the data is returned along the original path.
	641
45.75	642	(% 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.
29.1	643
45.75	644
29.1	645	=== 3.6.3 Modify intercept ===
	646
	647
45.75	648	send:
	649
45.69	650	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.73	651	\|=(% 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
29.1	652	\|(% 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" %)(((
	653	0X96
	654	)))
	655
	656	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	657
45.75	658	response:
29.1	659
45.69	660	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.73	661	\|=(% 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
29.1	662	\|(% style="width:99px" %)0X13\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	663	0X00
	664	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	665	0X96
	666	)))
	667
	668	=== 3.6.4 Query data ===
	669
9.1	670
37.1	671	Query the data (ORP) of the sensor (address 13), host → slave
35.1	672
45.69	673	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.73	674	\|=(% 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
35.1	675	\|(% 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
	676
	677	If the sensor receives correctly, the following data will be returned, slave → host
	678
45.69	679	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.73	680	\|=(% 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
35.1	681	\|(% 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
	682
11.1	683	The query data command is 13 03 00 00 00 01 87 78
10.1	684
11.1	685	For example, the returned data is 13 03 02 (% style="color:red" %)02 AE(%%) 80 9B.
10.1	686
11.1	687	02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
	688
	689
29.1	690	=== 3.6.5 Calibration Method ===
	691
45.75	692
29.1	693	This device uses two-point calibration, and two known ORP standard solutions need to be prepared. The calibration steps are as follows:
	694	(1) Place the electrode in distilled water to clean it, and then place it in 86mV standard buffer solution. After the data stabilizes,
	695	enter the following calibration command, and the 86mV point calibration is completed;
	696
45.69	697	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.74	698	\|=(% 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
29.1	699	\|(% style="width:64px" %)0X13\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	700	0X00
	701	)))\|(% style="width:68px" %)0X24\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XCB\|(% style="width:55px" %)(((
	702	0X03
	703	)))
	704
	705	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.
	706
45.69	707	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.74	708	\|=(% 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
	709	\|(% style="width:68px" %)0X13\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
29.1	710	0X00
	711	)))\|(% style="width:68px" %)0X25\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X9A\|(% style="width:55px" %)(((
	712	0XC3
	713	)))
	714
8.1	715	= 4. DR-DO1 Dissolved Oxygen Sensor =
	716
32.1	717	== 4.1 Specification ==
	718
33.2	719
58.1	720	* Measuring range: 0-20mg/L, 0–50℃
45.77	721
58.1	722	* Accuracy: 3%, ±0.5℃
45.77	723
58.1	724	* Resolution: 0.01 mg/L, 0.01℃
45.77	725
33.2	726	* Maximum operating pressure: 6 bar
45.77	727
33.2	728	* Output signal: A: 4-20mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
45.77	729
33.2	730	* Power supply voltage: 5-24V DC
45.77	731
59.1	732	* Working environment:
	733	** Ambient Temperature: 0–60°C
	734	** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
45.77	735
32.1	736	* Power consumption: ≤0.5W
	737
33.2	738	== 4.2 wiring ==
32.1	739
45.77	740
62.3	741	[[image:image-20240720172632-4.png\|\|height="390" width="640"]]
33.2	742
	743
45.77	744	== 4.3 Impedance requirements for current signals ==
33.2	745
45.77	746
46.2	747	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:400px" %)
	748	\|(% style="width:132px" %)Supply Voltage\|(% style="width:67px" %)9V\|(% style="width:67px" %)12V\|(% style="width:67px" %)20V\|(% style="width:67px" %)24V
	749	\|(% style="width:132px" %)Max Impedance\|(% style="width:65px" %)<250Ω\|(% style="width:67px" %)<400Ω\|(% style="width:67px" %)<500Ω\|(% style="width:65px" %)<900Ω
45.96	750
32.1	751	== 4.4 Mechinical Drawing ==
	752
	753
62.3	754	[[image:image-20240719155308-1.png\|\|height="226" width="527"]]
32.1	755
33.2	756
39.1	757	== 4.5 Instructions for use and maintenance ==
32.1	758
45.77	759
32.1	760	* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
45.77	761
32.1	762	* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	763
	764	== 4.6 RS485 Commands ==
	765
45.77	766
34.1	767	RS485 signaldefault address 0x14
	768	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	769
45.77	770
32.3	771	=== 4.6.1 Query address ===
32.1	772
32.3	773
45.77	774	send:
	775
	776	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.79	777	\|=(% 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
34.1	778	\|(% 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
32.3	779
34.1	780	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.
32.3	781
	782
45.77	783	response:
32.3	784
34.1	785	Register 0 data high and register 0 data low indicate the actual address of the sensor: 1
	786	Register 1 data high and register 1 data low indicate the sensor version
32.3	787
45.77	788	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.80	789	\|=(% 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
34.1	790	\|(% 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
	791
33.2	792	=== 4.6.2 Change address ===
32.3	793
45.77	794
34.1	795	For example: Change the address of the sensor with address 1 to 2(address range: 1-119), master → slave
33.2	796
45.77	797	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.83	798	\|=(% 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
33.2	799	\|(% 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
	800
45.77	801	response:
32.3	802
45.77	803	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.81	804	\|=(% 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
34.1	805	\|(% 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
32.3	806
34.1	807	=== 4.6.3 Query data ===
9.1	808
	809
34.2	810	Query the data (dissolved oxygen) of the sensor (address 14), host → slave
34.1	811
45.77	812	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.81	813	\|=(% 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
34.1	814	\|(% 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
	815
34.2	816	If the sensor receives correctly, the following data will be returned, slave → host
34.1	817
45.77	818	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.81	819	\|=(% 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
34.2	820	\|(% 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
34.1	821
11.1	822	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.
10.1	823
	824	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
	825
11.1	826
34.2	827	Query the data (temperature) of the sensor (address 14), host → slave
	828
45.77	829	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.82	830	\|=(% 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
34.2	831	\|(% 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
	832
	833	If the sensor receives correctly, the following data will be returned, slave → host
	834
45.77	835	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.82	836	\|=(% 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
34.2	837	\|(% 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
	838
	839	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.
	840
45.77	841	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
34.2	842
	843
8.1	844	= 5. DR-TS1 Water Turbidity Sensor =
	845
45.77	846	== 5.1 Specification ==
9.1	847
10.1	848
49.1	849	* Measuring range: 0.1~~1000.0NTU
32.3	850
	851	* Accuracy: ±5%
45.77	852
32.3	853	* Resolution: 0.1NTU
45.77	854
32.3	855	* Stability: ≤3mV/24 hours
	856
54.1	857	* Output signal: RS485 (standard Modbus-RTU protocol, device default address: 01)
45.77	858
55.1	859	* Power supply voltage: 5~~24V DC (when output signal is RS485), 12~~24V DC (when output signal is 4~~20mA)
45.77	860
59.1	861	* Working environment:
	862	** Ambient Temperature: 0–60°C
	863	** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
45.77	864
	865	* Power consumption: ≤ 0.5W
	866
32.3	867	== 5.2 wiring ==
	868
45.77	869
62.3	870	[[image:image-20240720172640-5.png\|\|height="387" width="635"]]
32.3	871
45.1	872
32.3	873	== 5.3 Impedance requirements for current signals ==
	874
45.88	875
46.3	876	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:400px" %)
	877	\|(% style="width:132px" %)Supply Voltage\|(% style="width:67px" %)9V\|(% style="width:67px" %)12V\|(% style="width:67px" %)20V\|(% style="width:67px" %)24V
	878	\|(% style="width:132px" %)Max Impedance\|(% style="width:65px" %)<250Ω\|(% style="width:67px" %)<400Ω\|(% style="width:67px" %)<500Ω\|(% style="width:65px" %)<900Ω
32.3	879
	880	== 5.4 Mechinical Drawing ==
	881
45.77	882
62.3	883	[[image:image-20240718195058-7.png\|\|height="305" width="593"]]
32.3	884
	885
39.1	886	== 5.5 Instructions for use and maintenance ==
32.3	887
45.77	888
32.3	889	* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
45.77	890
32.3	891	* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	892
	893	== 5.6 RS485 Commands ==
	894
	895
36.1	896	RS485 signaldefault address 0x15
	897	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	898
45.77	899
36.1	900	=== 5.6.1 Query address ===
	901
32.3	902
45.77	903	send:
	904
	905	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.86	906	\|=(% 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
45.84	907	\|(% 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
32.3	908
	909	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.
	910
	911
45.77	912	response:
32.3	913
45.77	914	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.84	915	\|=(% 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
32.3	916	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	917
36.1	918	=== 5.6.2 Change address ===
32.3	919
45.87	920
36.1	921	For example: Change the address of the sensor with address 1 to 2, master → slave
10.1	922
45.77	923	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.86	924	\|=(% 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
36.1	925	\|(% 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
	926
	927	If the sensor receives correctly, the data is returned along the original path.
	928
45.77	929	(% 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.
	930
45.84	931
36.1	932	=== 5.6.3 Query data ===
	933
	934
	935	Query the data (turbidity) of the sensor (address 15), host → slave
	936
45.77	937	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.84	938	\|=(% 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
36.1	939	\|(% 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
	940
	941	If the sensor receives correctly, the following data will be returned, slave → host
	942
45.77	943	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.84	944	\|=(% 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
36.1	945	\|(% 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
	946
11.1	947	The query data command is 15 03 00 00 00 01 87 1E
10.1	948
11.1	949	For example, the returned data is 15 03 02 (% style="color:red" %)02 9A(%%) 09 4C
	950
	951	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
49.2	952
	953
	954
62.5	955	= 6. DR-CL Water Turbidity Sensor =
49.2	956
62.6	957	== 6.1 Specification: ==
62.5	958
	959
62.6	960	* Power Input: DC7~~30
	961
	962	* Power Consumption : 0.19W
	963
	964	* Interface: RS485. 9600 Baud Rate
	965
	966	* CL Range & Resolution:
	967	CL2ML** : 0.02 ~~ 20 μS/cm
	968	CL10ML**: 0.2 ~~ 200.0 μS/cm
	969	ECK1.0** : 0 ~~ 2,000 μS/cm Resolution: 1 μS/cm
	970	ECK10.0** : 10 ~~ 20,000 μS/cm Resolution: 10 μS/cm
	971
	972	* EC Accuracy: ±1% FS
	973	* Temperature Accuracy: ±0.5 °C
	974	* Working environment:
	975	** Ambient Temperature: 0–60°C
	976	** Relative Humidity: <85% RH(Specifically refers to the cable male and female)
	977	* IP Rated: IP68
	978
	979	* Max Pressure: 0.6MPa
	980
62.4	981	= 7. Water Quality Sensor Datasheet =
	982
	983
51.1	984	* [[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]]

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