Wiki source code of Water Quality Sensors

Version 45.29 by Xiaoling on 2024/08/06 11:18

version	line-number	content
1.1	1	Table of Contents:
	2
	3	{{toc/}}
	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
	14	* Power Consumption : < 0.5W
	15	* Interface: RS485. 9600 Baud Rate
	16	* EC Range & Resolution:
	17	ECK0.01** : 0.02 ~~ 20 μS/cm
	18	ECK0.1**: 0.2 ~~ 200.0 μS/cm
	19	ECK1.0** : 2 ~~ 2,000 μS/cm Resolution: 1 μS/cm
	20	ECK10.0** : 20 ~~ 20,000 μS/cm Resolution: 10 μS/cm
	21	* EC Accuracy: ±1% FS
	22	* Temperature Measure Range: -20 ~~ 60 °C
	23	* Temperature Accuracy: ±0.5 °C
	24	* IP Rated: IP68
	25	* Max Pressure: 0.6MPa
	26
45.2	27
7.1	28	== 1.2 Application for Different Range ==
	29
45.2	30
7.1	31	[[image:image-20240714173018-1.png]]
	32
	33
	34	== 1.3 Wiring ==
	35
45.2	36
45.1	37	[[image:image-20240720172533-1.png\|\|height="347" width="569"]]
7.1	38
45.1	39
7.1	40	== 1.4 Mechinical Drawing ==
	41
45.2	42
7.1	43	[[image:image-20240714174241-2.png]]
	44
	45
	46	== 1.5 Installation ==
	47
	48
45.2	49	Electrode installation form:
15.2	50
45.2	51	A: Side wall installation
15.2	52
45.2	53	B: Top flange installation
15.2	54
45.2	55	C: Pipeline bend installation
15.2	56
45.2	57	D: Pipeline bend installation
15.2	58
45.2	59	E: Flow-through installation
15.2	60
45.2	61	F: Submerged installation
15.2	62
23.1	63	[[image:image-20240718190121-1.png\|\|height="350" width="520"]]
15.2	64
18.1	65	Several common installation methods of electrodes
15.2	66
18.1	67	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	68
18.1	69	A. Several common incorrect installation methods
15.2	70
23.1	71	[[image:image-20240718190204-2.png\|\|height="262" width="487"]]
15.2	72
45.2	73	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	74
23.1	75	[[image:image-20240718190221-3.png\|\|height="292" width="500"]]
18.1	76
45.2	77	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	78
	79	B. Correct installation method
	80
23.1	81	[[image:image-20240718190249-4.png\|\|height="287" width="515"]]
18.1	82
	83
38.1	84	== 1.6 Maintenance ==
7.1	85
	86
26.1	87	* 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.
	88	* 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.
	89	* 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.
	90	* 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	91
45.2	92
8.1	93	== 1.7 RS485 Commands ==
	94
15.2	95
	96	RS485 signal (K1 default address 0x12; K10 default address 0x11):
	97	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	98
	99
16.1	100	=== 1.7.1 Query address ===
8.1	101
11.1	102
45.2	103	send
	104
	105	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.12	106	\|=(% style="width: 74px;background-color:#4F81BD;color:white" %)Original address\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 60px; background-color: rgb(79, 129, 189); color: white;" %)Address high\|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Address low\|=(% style="width: 70px; 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: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
45.29	107	\|(% style="width:99px" %)0XFE \|(% style="width:72px" %)0X03\|(% style="width:64px" %)0X00\|(% style="width:50px" %)0X50\|(% style="width:50px" %)0X00\|(% style="width:50px" %)0X00\|(% style="width:56px" %)0X51\|(% style="width:56px" %)0XD4
16.1	108
	109	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.
	110
	111
45.2	112	response
16.1	113
45.14	114	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
45.10	115	\|=(% 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	116	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
16.1	117
45.2	118
16.1	119	=== 1.7.2 Change address ===
	120
45.2	121
16.1	122	For example: Change the address of the sensor with address 1 to 2, master → slave
	123
45.20	124	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.29	125	\|=(% style="width: 75px; background-color: rgb(79, 129, 189); color: white;" %)Original address\|=(% style="width: 65px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 65px; background-color: rgb(79, 129, 189); color: white;" %)Address high\|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Address low\|=(% style="width: 71px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high\|=(% style="width: 71px; 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: 54px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	126	\|(% style="width:67px" %)0X01\|(% style="width:76px" %)0X06\|(% style="width:62px" %)0X00\|(% style="width:54px" %)0X50\|(% style="width:64px" %)0X00\|(% style="width:64px" %)0X02\|(% style="width:57px" %)0X08\|(% style="width:56px" %)0X1A
16.1	127
	128	If the sensor receives correctly, the data is returned along the original path.
	129	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.
	130
	131
	132	=== 1.7.3 Modify intercept ===
	133
	134
	135	send
	136
45.20	137	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
16.1	138	\|=(% 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
27.1	139	\|(% style="width:99px" %)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" %)(((
	140	0X07
16.1	141	)))
	142
	143	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	144
	145	response
	146
45.20	147	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
16.1	148	\|=(% 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	149	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	150	0X02
27.1	151	)))\|(% style="width:126px" %)0X00\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X0A\|(% style="width:1px" %)0X38\|(% style="width:1px" %)(((
	152	0X8F
16.1	153	)))
	154
	155	=== 1.7.4 Query data ===
	156
37.1	157
	158	Query the data (EC,temperature) of the sensor (address 11), host → slave
	159
45.20	160	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
37.1	161	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	162	\|(% 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
	163
	164	If the sensor receives correctly, the following data will be returned, slave → host
	165
45.20	166	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
37.1	167	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	168	\|(% 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
	169
16.3	170	The address of the EC K10 sensor is 11
16.1	171
10.1	172	The query data command is 11 03 00 00 00 02 C6 9B
	173
37.1	174	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	175
	176
37.1	177	Query the data (EC,temperature) of the sensor (address 11), host → slave
	178
45.20	179	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
37.1	180	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	181	\|(% 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
	182
	183	If the sensor receives correctly, the following data will be returned, slave → host
	184
45.20	185	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
37.1	186	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	187	\|(% 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
	188
10.1	189	The address of the EC K1 sensor is 12
	190
	191	The query data command is 12 03 00 00 00 02 C6 A8
	192
37.1	193	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	194
11.1	195
16.2	196	=== 1.7.5 Calibration Method ===
12.1	197
	198
15.1	199	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	200
15.1	201	The calibration steps are as follows:
	202	(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.
	203
45.20	204	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
14.1	205	\|=(% 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
	206	\|(% 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" %)(((
	207	0X00
12.1	208
14.1	209	0X00
	210
	211	0X37
	212
	213	0X32
	214	)))\|(% style="width:1px" %)0XBD\|(% style="width:1px" %)0XFC
	215
15.1	216	1413*10 gives 0X00003732
14.1	217
16.1	218	response
15.1	219
45.20	220	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
14.1	221	\|=(% 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	222	\|(% 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
	223
	224	(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
	225
45.20	226	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
13.1	227	\|=(% 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
14.1	228	\|(% 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" %)(((
	229	0X00
12.1	230
14.1	231	0X01
	232
	233	0XF7
	234
	235	0X20
	236	)))\|(% style="width:1px" %)0X33\|(% style="width:1px" %)0X75
	237
15.1	238	12880*10 gives 0X01F720
	239
16.1	240	response
14.1	241
45.20	242	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
14.1	243	\|=(% 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	244	\|(% 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
	245
45.20	246
	247
8.1	248	= 2. DR-PH01 Water PH Sensor =
	249
28.2	250	== 2.1 Specification ==
9.1	251
45.20	252
26.1	253	* Power Input: DC7~~30
	254	* Power Consumption : < 0.5W
	255	* Interface: RS485. 9600 Baud Rate
	256	* pH measurement range: 0~~14.00pH; resolution: 0.01pH
	257	* pH measurement error:±0.15pH
	258	* Repeatability error:±0.02pH
	259	* Temperature measurement range:0~~60℃; resolution: 0.1℃ (set temperature for manual temperature compensation, default 25℃)
	260	* Temperature measurement error: ±0.5℃
	261	* Temperature Measure Range: -20 ~~ 60 °C
	262	* Temperature Accuracy: ±0.5 °C
	263	* IP Rated: IP68
	264	* Max Pressure: 0.6MPa
	265
	266	== 2.2 Wiring ==
	267
45.1	268	[[image:image-20240720172548-2.png\|\|height="348" width="571"]]
26.1	269
45.1	270
26.1	271	== (% style="color:inherit; font-family:inherit" %)2.3 (% style="color:inherit; font-family:inherit; font-size:26px" %)Mechinical Drawing(%%) ==
	272
	273	[[image:image-20240714174241-2.png]]
	274
	275
	276	== 2.4 Installation Notice ==
	277
	278	Do not power on while connect the cables. Double check the wiring before power on.
	279
	280	Installation Photo as reference:
	281
	282	~ Submerged installation:
	283
	284	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.
	285
	286	[[image:image-20240718191348-6.png]]
	287
	288	~ Pipeline installation:
	289
	290	Connect the equipment to the pipeline through the 3/4 thread.
	291
	292	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
	293
	294	Sampling:
	295
	296	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.
	297
	298	Measure the pH of the water sample:
	299
	300	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.
	301
	302
39.1	303	== 2.5 Maintenance ==
26.1	304
	305
	306	* 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!
	307	* 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.
	308	* 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.
	309	* 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.
	310	* 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.
	311	* The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
	312	* 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.
	313	* 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.
	314	* (((
	315	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.
	316	)))
	317
	318	== 2.6 RS485 Commands ==
	319
27.1	320	RS485 signaldefault address 0x10
	321	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
26.1	322
33.2	323	=== 2.6.1 Query address ===
27.1	324
	325	send
	326
	327	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	328	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	329	\|(% 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
	330
	331	response
	332
	333	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	334	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)New address\|=(% style="width: 50px;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
	335	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	336
	337	=== 2.6.2 Change address ===
	338
	339	For example: Change the address of the sensor with address 1 to 2, master → slave
	340
	341	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	342	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	343	\|(% 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
	344
	345	If the sensor receives correctly, the data is returned along the original path.
	346	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.
	347
	348
	349	=== 2.6.3 Modify intercept ===
	350
	351
	352	send
	353
34.3	354	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:570.333px" %)
	355	\|=(% style="width: 71px; background-color: rgb(79, 129, 189); color: white;" %)Address\|=(% style="width: 74px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 67px; 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: 69px; background-color: rgb(79, 129, 189); color: white;" %)Register Length high\|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Register Length low\|=(% style="width: 57px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 57px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	356	\|(% 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	357	0XA5
	358	)))
	359
34.4	360	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	361
	362	response
	363
	364	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	365	\|=(% 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	366	\|(% style="width:99px" %)0X10\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	367	0X00
	368	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	369	0XA5
	370	)))
	371
	372	=== 2.6.4 Query data ===
	373
	374
34.3	375	Query the data (PH) of the sensor (address 10), host → slave
9.1	376
34.3	377	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	378	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	379	\|(% 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
	380
	381	If the sensor receives correctly, the following data will be returned, slave → host
	382
	383	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	384	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
35.1	385	\|(% 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	386
11.1	387	The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
10.1	388
11.1	389	For example, the returned data is 10 03 02 (% style="color:red" %)02 AE(%%) C4 9B.
	390
	391	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.
	392
	393
27.1	394	=== 2.6.5 Calibration Method ===
	395
	396
	397	This device uses three-point calibration, and three known pH standard solutions need to be prepared.
	398	The calibration steps are as follows:
	399	(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.
	400
	401	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	402	\|=(% style="width: 64px; 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
	403	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	404	0X00
	405	)))\|(% style="width:68px" %)0X20\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X8A\|(% style="width:55px" %)(((
	406	0XF1
	407	)))
	408
	409	(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.
	410
	411	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	412	\|=(% style="width: 64px; 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
	413	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	414	0X00
	415	)))\|(% style="width:68px" %)0X21\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XDB\|(% style="width:55px" %)(((
	416	0X31
	417	)))
	418
	419	(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.
	420
	421	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	422	\|=(% style="width: 64px; 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
	423	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	424	0X00
	425	)))\|(% style="width:68px" %)0X22\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X2B\|(% style="width:55px" %)(((
	426	0X31
	427	)))
	428
	429	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.
	430
	431
8.1	432	= 3. DR-ORP1 Water ORP Sensor =
	433
27.2	434
28.2	435	== 3.1 Specification ==
27.2	436
	437	* Power Input: DC7~~30
32.1	438	* Measuring range: -1999~~1999mV
	439	Resolution: 1mV
27.2	440	* Interface: RS485. 9600 Baud Rate
	441	* Measurement error: ±3mV
	442	* Stability: ≤2mv/24 hours
	443	* Equipment working conditions: Ambient temperature: 0-60℃ Relative humidity: <85%RH
	444	* IP Rated: IP68
	445	* Max Pressure: 0.6MPa
	446
	447	== 3.2 Wiring ==
	448
45.1	449	[[image:image-20240720172620-3.png\|\|height="378" width="620"]]
27.2	450
45.1	451
27.2	452	== 3.3 Mechinical Drawing ==
	453
	454	[[image:image-20240714174241-2.png]]
	455
	456	== 3.4 Installation Notice ==
	457
	458	Do not power on while connect the cables. Double check the wiring before power on.
	459
	460	Installation Photo as reference:
	461
	462	~ Submerged installation:
	463
	464	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.
	465
	466	[[image:image-20240718191348-6.png]]
	467
	468	~ Pipeline installation:
	469
	470	Connect the equipment to the pipeline through the 3/4 thread.
	471
	472	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
	473
	474
39.1	475	== 3.5 Maintenance ==
8.1	476
9.1	477
29.1	478	(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	479
29.1	480	(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	481
29.1	482	(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	483
29.1	484	(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	485
29.1	486	(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	487
29.1	488	(6) The electrode should be cleaned with deionized water before and after the measurement to ensure the measurement accuracy.
32.3	489
29.1	490	(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	491
29.1	492	(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	493
29.1	494	(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.
	495
	496	== 3.6 RS485 Commands ==
	497
	498
	499	RS485 signaldefault address 0x13
	500	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	501
33.2	502	=== 3.6.1 Query address ===
29.1	503
	504	send
	505
	506	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	507	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	508	\|(% 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
	509
	510	response
	511
	512	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	513	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)New address\|=(% style="width: 50px;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
	514	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	515
	516	=== 3.6.2 Change address ===
	517
	518	For example: Change the address of the sensor with address 1 to 2, master → slave
	519
	520	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	521	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	522	\|(% 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
	523
	524	If the sensor receives correctly, the data is returned along the original path.
	525	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.
	526
	527
	528	=== 3.6.3 Modify intercept ===
	529
	530	send
	531
	532	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
35.1	533	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code\|=(% style="width: 67px; 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: 69px; background-color: rgb(79, 129, 189); color: white;" %)Register Length high\|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Register Length low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
29.1	534	\|(% 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" %)(((
	535	0X96
	536	)))
	537
	538	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	539
	540	response
	541
	542	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	543	\|=(% 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	544	\|(% style="width:99px" %)0X13\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	545	0X00
	546	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	547	0X96
	548	)))
	549
	550	=== 3.6.4 Query data ===
	551
9.1	552
37.1	553	Query the data (ORP) of the sensor (address 13), host → slave
35.1	554
	555	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	556	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	557	\|(% 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
	558
	559	If the sensor receives correctly, the following data will be returned, slave → host
	560
	561	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	562	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	563	\|(% 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
	564
11.1	565	The query data command is 13 03 00 00 00 01 87 78
10.1	566
11.1	567	For example, the returned data is 13 03 02 (% style="color:red" %)02 AE(%%) 80 9B.
10.1	568
11.1	569	02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
	570
	571
29.1	572	=== 3.6.5 Calibration Method ===
	573
	574	This device uses two-point calibration, and two known ORP standard solutions need to be prepared. The calibration steps are as follows:
	575	(1) Place the electrode in distilled water to clean it, and then place it in 86mV standard buffer solution. After the data stabilizes,
	576	enter the following calibration command, and the 86mV point calibration is completed;
	577
	578	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	579	\|=(% style="width: 64px; 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
	580	\|(% style="width:64px" %)0X13\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	581	0X00
	582	)))\|(% style="width:68px" %)0X24\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XCB\|(% style="width:55px" %)(((
	583	0X03
	584	)))
	585
	586	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.
	587
	588	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	589	\|=(% style="width: 64px; 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
	590	\|(% style="width:64px" %)0X13\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	591	0X00
	592	)))\|(% style="width:68px" %)0X25\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X9A\|(% style="width:55px" %)(((
	593	0XC3
	594	)))
	595
8.1	596	= 4. DR-DO1 Dissolved Oxygen Sensor =
	597
	598
11.1	599
32.1	600	== 4.1 Specification ==
	601
33.2	602
	603	* Measuring range: 0-20mg/L, 0-50℃
	604	* Accuracy: 3%, ±0.5℃
	605	* Resolution: 0.01 mg/L, 0.01℃
	606	* Maximum operating pressure: 6 bar
	607	* Output signal: A: 4-20mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
	608	* Power supply voltage: 5-24V DC
	609	* Working environment: temperature 0-60℃; humidity <95%RH
32.1	610	* Power consumption: ≤0.5W
	611
33.2	612	== 4.2 wiring ==
32.1	613
45.1	614	[[image:image-20240720172632-4.png\|\|height="390" width="640"]]
33.2	615
	616
	617	== (% id="cke_bm_224234S" style="display:none" %) (%%)4.3 Impedance requirements for current signals ==
	618
32.1	619	[[image:image-20240718195414-8.png\|\|height="100" width="575"]]
	620
	621
	622	== 4.4 Mechinical Drawing ==
	623
	624
33.2	625	[[image:image-20240719155308-1.png\|\|height="226" width="527"]]
32.1	626
33.2	627
39.1	628	== 4.5 Instructions for use and maintenance ==
32.1	629
	630	* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
	631	* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	632
	633	== 4.6 RS485 Commands ==
	634
34.1	635	RS485 signaldefault address 0x14
	636	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	637
32.3	638	=== 4.6.1 Query address ===
32.1	639
32.3	640	send
	641
	642	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
34.1	643	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; background-color: rgb(79, 129, 189); color: white;" %)Register address high\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register address low\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	644	\|(% 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	645
34.1	646	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	647
	648
	649	response
	650
34.1	651	Register 0 data high and register 0 data low indicate the actual address of the sensor: 1
	652	Register 1 data high and register 1 data low indicate the sensor version
32.3	653
34.1	654	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	655	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register 1 Data low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	656	\|(% 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
	657
33.2	658	=== 4.6.2 Change address ===
32.3	659
34.1	660	For example: Change the address of the sensor with address 1 to 2(address range: 1-119), master → slave
33.2	661
	662	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:907.333px" %)
	663	\|=(% style="width: 67px; background-color: rgb(79, 129, 189); color: white;" %)Original address\|=(% style="width: 71px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 65px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address high\|=(% style="width: 65px; background-color: rgb(79, 129, 189); color: white;" %)Starting register address low\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Start address high\|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Start address low\|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Sensor version\|=(% style="width: 53px; background-color: rgb(79, 129, 189); color: white;" %)Sensor version\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low
	664	\|(% 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
	665
34.1	666	response
32.3	667
34.1	668	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	669	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	670	\|(% 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	671
34.1	672	=== 4.6.3 Query data ===
9.1	673
	674
34.2	675	Query the data (dissolved oxygen) of the sensor (address 14), host → slave
34.1	676
	677	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	678	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	679	\|(% 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
	680
34.2	681	If the sensor receives correctly, the following data will be returned, slave → host
34.1	682
	683	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	684	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
34.2	685	\|(% 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	686
11.1	687	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	688
	689	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
	690
11.1	691
34.2	692	Query the data (temperature) of the sensor (address 14), host → slave
	693
	694	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	695	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	696	\|(% 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
	697
	698	If the sensor receives correctly, the following data will be returned, slave → host
	699
	700	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	701	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	702	\|(% 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
	703
	704	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.
	705
	706	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℃
	707
	708
8.1	709	= 5. DR-TS1 Water Turbidity Sensor =
	710
9.1	711
10.1	712
32.3	713	== (% id="cke_bm_81470S" style="display:none" %) (%%)5.1 Specification ==
	714
	715	* Measuring range: 0.1～1000.0NTU
	716	* Accuracy: ±5%
	717	* Resolution: 0.1NTU
	718	* Stability: ≤3mV/24 hours
	719	* Output signal: A: 4～20 mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
	720	* Power supply voltage: 5～24V DC (when output signal is RS485)12～24V DC (when output signal is 4～20mA)
	721	* Working environment: temperature 0～60℃; humidity ≤95%RH
	722	* Power consumption: ≤0.5W
	723
	724	== 5.2 wiring ==
	725
45.1	726	[[image:image-20240720172640-5.png\|\|height="387" width="635"]]
32.3	727
45.1	728
32.3	729	== 5.3 Impedance requirements for current signals ==
	730
	731	[[image:image-20240718195414-8.png\|\|height="100" width="575"]]
	732
	733
	734	== 5.4 Mechinical Drawing ==
	735
	736	[[image:image-20240718195058-7.png\|\|height="305" width="593"]]
	737
	738
39.1	739	== 5.5 Instructions for use and maintenance ==
32.3	740
	741	* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
	742	* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	743
	744	== 5.6 RS485 Commands ==
	745
	746
36.1	747	RS485 signaldefault address 0x15
	748	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	749
	750	=== 5.6.1 Query address ===
	751
32.3	752	send
	753
	754	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	755	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	756	\|(% style="width:99px" %)0XFE \|(% style="width:72px" %)0X03\|(% style="width:64px" %)0X00\|(% style="width:68px" %)0X50\|(% style="width:70px" %)0X00\|(% style="width:72px" %)0X00\|(% style="width:56px" %)0X51\|(% style="width:56px" %)0XD4
	757
	758	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.
	759
	760
	761	response
	762
	763	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	764	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)New address\|=(% style="width: 50px;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
	765	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	766
36.1	767	=== 5.6.2 Change address ===
32.3	768
36.1	769	For example: Change the address of the sensor with address 1 to 2, master → slave
10.1	770
36.1	771	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	772	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original 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: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	773	\|(% 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
	774
	775	If the sensor receives correctly, the data is returned along the original path.
	776	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.
	777
	778	=== 5.6.3 Query data ===
	779
	780
	781	Query the data (turbidity) of the sensor (address 15), host → slave
	782
	783	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	784	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 64px; 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: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register length high\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Register length low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	785	\|(% 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
	786
	787	If the sensor receives correctly, the following data will be returned, slave → host
	788
	789	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	790	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Data length\|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	791	\|(% 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
	792
11.1	793	The query data command is 15 03 00 00 00 01 87 1E
10.1	794
11.1	795	For example, the returned data is 15 03 02 (% style="color:red" %)02 9A(%%) 09 4C
	796
	797	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

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