Skip to Content

Wiki source code of Water Quality Sensors

Version 13.1 by Karry Zhuang on 2024/07/18 15:59
Show last authors
1 **Table of Contents:**
2
3 {{toc/}}
4
5
6 = 1. DR-ECK Water EC Probe =
7
8 == 1.1 Specification: ==
9
10 * **Power Input**: DC7~~30
11 * **Power Consumption** : < 0.5W
12 * **Interface**: RS485. 9600 Baud Rate
13 * **EC Range & Resolution:**
14 ** **ECK0.01** : 0.02 ~~ 20 μS/cm
15 ** **ECK0.1**: 0.2 ~~ 200.0 μS/cm
16 ** **ECK1.0** : 2 ~~ 2,000 μS/cm  Resolution: 1 μS/cm
17 ** **ECK10.0** : 20 ~~ 20,000 μS/cm  Resolution: 10 μS/cm
18 * **EC Accuracy**: ±1% FS
19 * **Temperature Measure Range**: -20 ~~ 60 °C
20 * **Temperature Accuracy: **±0.5 °C
21 * **IP Rated**: IP68
22 * **Max Pressure**: 0.6MPa
23
24 == 1.2 Application for Different Range ==
25
26 [[image:image-20240714173018-1.png]]
27
28
29 == 1.3 Wiring ==
30
31
32 == 1.4 Mechinical Drawing ==
33
34 [[image:image-20240714174241-2.png]]
35
36
37 == 1.5 Installation ==
38
39
40 == 1.6 Maintain ==
41
42
43 == 1.7 RS485 Commands ==
44
45 === 1.7.1 Query data ===
46
47 The address of the EC K10 sensor is 11
48
49 The query data command is 11 03 00 00 00 02 C6 9B
50
51 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
52
53
54 The address of the EC K1 sensor is 12
55
56 The query data command is 12 03 00 00 00 02 C6 A8
57
58 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.
59
60
61 === 1.7.2 Calibration Method ===
62
63
64 This device uses one-point calibration, and you need to prepare a known E standard solution. When mileage K=1, 1~~2000 uses 1413uS/cm standard solution, and when mileage K=10, 10~~20000 uses 12.88mS/cm standard solution. The calibration steps are as follows:
65 (1) Place the electrode in distilled water and clean it. When mileage 1~~2000 uses 1413HS/cm standard solution, enter the following calibration command after the data is stable.
66
67
68 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
69 |=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 1px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 139.083px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Data|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
70 |(% style="width:99px" %) |(% style="width:112px" %) |(% style="width:135px" %) |(% style="width:126px" %) |(% style="width:85px" %) |(% style="width:1px" %) |(% style="width:1px" %) |(% style="width:1px" %) |(% style="width:1px" %) |(% style="width:1px" %)
71
72 = 2. DR-PH01 Water PH Sensor =
73
74 == 2.7 RS485 Commands ==
75
76
77 The address of the pH  sensor is 10
78
79 The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
80
81 For example, the returned data is 10 03 02 (% style="color:red" %)**02 AE**(%%) C4 9B.
82
83 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.
84
85
86 = 3. DR-ORP1 Water ORP Sensor =
87
88 == 3.7 RS485 Commands ==
89
90
91 The address of the ORP sensor is 13
92
93 The query data command is 13 03 00 00 00 01 87 78
94
95 For example, the returned data is 13 03 02 (% style="color:red" %)**02 AE**(%%) 80 9B.
96
97 02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
98
99
100 = 4. DR-DO1 Dissolved Oxygen Sensor =
101
102 == 4.7 RS485 Commands ==
103
104
105 The address of the dissolved oxygen sensor is 14
106
107 The query data command is 14 03 00 14 00 01 C6 CB
108
109 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.
110
111 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
112
113
114 = 5. DR-TS1 Water Turbidity Sensor =
115
116 == 5.7 RS485 Commands ==
117
118
119 The address of the dissolved oxygen sensor is 15
120
121 The query data command is 15 03 00 00 00 01 87 1E
122
123 For example, the returned data is 15 03 02 (% style="color:red" %)**02 9A**(%%) 09 4C
124
125 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
126
127