Wiki source code of Water Quality Sensors

Version 45.48 by Xiaoling on 2024/08/06 13:55

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
	27	== 1.2 Application for Different Range ==
	28
45.2	29
7.1	30	[[image:image-20240714173018-1.png]]
	31
	32
	33	== 1.3 Wiring ==
	34
45.2	35
45.1	36	[[image:image-20240720172533-1.png\|\|height="347" width="569"]]
7.1	37
45.1	38
7.1	39	== 1.4 Mechinical Drawing ==
	40
45.2	41
7.1	42	[[image:image-20240714174241-2.png]]
	43
	44
	45	== 1.5 Installation ==
	46
	47
45.2	48	Electrode installation form:
15.2	49
45.2	50	A: Side wall installation
15.2	51
45.2	52	B: Top flange installation
15.2	53
45.2	54	C: Pipeline bend installation
15.2	55
45.2	56	D: Pipeline bend installation
15.2	57
45.2	58	E: Flow-through installation
15.2	59
45.2	60	F: Submerged installation
15.2	61
23.1	62	[[image:image-20240718190121-1.png\|\|height="350" width="520"]]
15.2	63
18.1	64	Several common installation methods of electrodes
15.2	65
18.1	66	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	67
18.1	68	A. Several common incorrect installation methods
15.2	69
23.1	70	[[image:image-20240718190204-2.png\|\|height="262" width="487"]]
15.2	71
45.2	72	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	73
23.1	74	[[image:image-20240718190221-3.png\|\|height="292" width="500"]]
18.1	75
45.2	76	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	77
	78	B. Correct installation method
	79
23.1	80	[[image:image-20240718190249-4.png\|\|height="287" width="515"]]
18.1	81
	82
38.1	83	== 1.6 Maintenance ==
7.1	84
	85
26.1	86	* 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.
	87	* 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.
	88	* 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.
	89	* 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	90
8.1	91	== 1.7 RS485 Commands ==
	92
15.2	93
	94	RS485 signal (K1 default address 0x12; K10 default address 0x11):
	95	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	96
	97
16.1	98	=== 1.7.1 Query address ===
8.1	99
11.1	100
45.48	101	send:
45.2	102
	103	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.40	104	\|=(% 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	105	\|(% 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	106
	107	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.
	108
	109
45.48	110	response:
16.1	111
45.14	112	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
45.10	113	\|=(% 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	114	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
16.1	115
	116	=== 1.7.2 Change address ===
	117
45.2	118
16.1	119	For example: Change the address of the sensor with address 1 to 2, master → slave
	120
45.20	121	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.39	122	\|=(% 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	123	\|(% 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	124
	125	If the sensor receives correctly, the data is returned along the original path.
	126
45.32	127	(% 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	128
45.32	129
16.1	130	=== 1.7.3 Modify intercept ===
	131
	132
45.48	133	send:
16.1	134
45.36	135	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
45.34	136	\|=(% 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
	137	\|(% 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	138	0X07
16.1	139	)))
	140
	141	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	142
45.48	143	response:
16.1	144
45.36	145	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:512px" %)
45.35	146	\|=(% 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	147	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	148	0X02
27.1	149	)))\|(% style="width:126px" %)0X00\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X0A\|(% style="width:1px" %)0X38\|(% style="width:1px" %)(((
	150	0X8F
16.1	151	)))
	152
	153	=== 1.7.4 Query data ===
	154
37.1	155
	156	Query the data (EC,temperature) of the sensor (address 11), host → slave
	157
45.20	158	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.43	159	\|=(% 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	160	\|(% 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
	161
	162	If the sensor receives correctly, the following data will be returned, slave → host
	163
45.20	164	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.42	165	\|=(% 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	166	\|(% 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
	167
16.3	168	The address of the EC K10 sensor is 11
16.1	169
10.1	170	The query data command is 11 03 00 00 00 02 C6 9B
	171
45.48	172	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	173
	174
37.1	175	Query the data (EC,temperature) of the sensor (address 11), host → slave
	176
45.20	177	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.44	178	\|=(% 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	179	\|(% 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
	180
	181	If the sensor receives correctly, the following data will be returned, slave → host
	182
45.20	183	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.44	184	\|=(% 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	185	\|(% 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
	186
10.1	187	The address of the EC K1 sensor is 12
	188
	189	The query data command is 12 03 00 00 00 02 C6 A8
	190
45.48	191	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	192
11.1	193
16.2	194	=== 1.7.5 Calibration Method ===
12.1	195
	196
15.1	197	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	198
45.48	199	The calibration steps are as follows:
15.1	200	(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.
	201
45.20	202	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.47	203	\|=(% 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	204	\|(% 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" %)(((
	205	0X00
	206	0X00
	207	0X37
	208	0X32
	209	)))\|(% style="width:1px" %)0XBD\|(% style="width:1px" %)0XFC
	210
15.1	211	1413*10 gives 0X00003732
14.1	212
45.48	213	response:
15.1	214
45.20	215	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.45	216	\|=(% 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	217	\|(% 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
	218
	219	(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
	220
45.20	221	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.47	222	\|=(% 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	223	\|(% 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" %)(((
	224	0X00
	225	0X01
	226	0XF7
	227	0X20
	228	)))\|(% style="width:1px" %)0X33\|(% style="width:1px" %)0X75
	229
15.1	230	12880*10 gives 0X01F720
	231
45.48	232	response:
14.1	233
45.20	234	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.45	235	\|=(% 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	236	\|(% 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
	237
45.20	238
8.1	239	= 2. DR-PH01 Water PH Sensor =
	240
28.2	241	== 2.1 Specification ==
9.1	242
45.20	243
26.1	244	* Power Input: DC7~~30
	245	* Power Consumption : < 0.5W
	246	* Interface: RS485. 9600 Baud Rate
	247	* pH measurement range: 0~~14.00pH; resolution: 0.01pH
	248	* pH measurement error:±0.15pH
	249	* Repeatability error:±0.02pH
	250	* Temperature measurement range:0~~60℃; resolution: 0.1℃ (set temperature for manual temperature compensation, default 25℃)
	251	* Temperature measurement error: ±0.5℃
	252	* Temperature Measure Range: -20 ~~ 60 °C
	253	* Temperature Accuracy: ±0.5 °C
	254	* IP Rated: IP68
	255	* Max Pressure: 0.6MPa
	256
	257	== 2.2 Wiring ==
	258
45.1	259	[[image:image-20240720172548-2.png\|\|height="348" width="571"]]
26.1	260
45.1	261
26.1	262	== (% style="color:inherit; font-family:inherit" %)2.3 (% style="color:inherit; font-family:inherit; font-size:26px" %)Mechinical Drawing(%%) ==
	263
	264	[[image:image-20240714174241-2.png]]
	265
	266
	267	== 2.4 Installation Notice ==
	268
	269	Do not power on while connect the cables. Double check the wiring before power on.
	270
	271	Installation Photo as reference:
	272
	273	~ Submerged installation:
	274
	275	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.
	276
	277	[[image:image-20240718191348-6.png]]
	278
	279	~ Pipeline installation:
	280
	281	Connect the equipment to the pipeline through the 3/4 thread.
	282
	283	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
	284
	285	Sampling:
	286
	287	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.
	288
	289	Measure the pH of the water sample:
	290
	291	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.
	292
	293
39.1	294	== 2.5 Maintenance ==
26.1	295
	296
	297	* 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!
	298	* 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.
	299	* 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.
	300	* 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.
	301	* 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.
	302	* The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
	303	* 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.
	304	* 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.
	305	* (((
	306	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.
	307	)))
	308
	309	== 2.6 RS485 Commands ==
	310
27.1	311	RS485 signaldefault address 0x10
	312	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
26.1	313
33.2	314	=== 2.6.1 Query address ===
27.1	315
	316	send
	317
	318	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	319	\|=(% 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
	320	\|(% 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
	321
	322	response
	323
	324	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	325	\|=(% 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
	326	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	327
	328	=== 2.6.2 Change address ===
	329
	330	For example: Change the address of the sensor with address 1 to 2, master → slave
	331
	332	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	333	\|=(% 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
	334	\|(% 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
	335
	336	If the sensor receives correctly, the data is returned along the original path.
	337	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.
	338
	339
	340	=== 2.6.3 Modify intercept ===
	341
	342
	343	send
	344
34.3	345	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:570.333px" %)
	346	\|=(% 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
	347	\|(% 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	348	0XA5
	349	)))
	350
34.4	351	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	352
	353	response
	354
	355	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	356	\|=(% 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
	357	\|(% style="width:99px" %)0X10\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	358	0X00
	359	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	360	0XA5
	361	)))
	362
	363	=== 2.6.4 Query data ===
	364
	365
34.3	366	Query the data (PH) of the sensor (address 10), host → slave
9.1	367
34.3	368	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	369	\|=(% 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
	370	\|(% 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
	371
	372	If the sensor receives correctly, the following data will be returned, slave → host
	373
	374	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	375	\|=(% 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	376	\|(% 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	377
11.1	378	The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
10.1	379
11.1	380	For example, the returned data is 10 03 02 (% style="color:red" %)02 AE(%%) C4 9B.
	381
	382	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.
	383
	384
27.1	385	=== 2.6.5 Calibration Method ===
	386
	387
	388	This device uses three-point calibration, and three known pH standard solutions need to be prepared.
	389	The calibration steps are as follows:
	390	(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.
	391
	392	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	393	\|=(% 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
	394	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	395	0X00
	396	)))\|(% style="width:68px" %)0X20\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X8A\|(% style="width:55px" %)(((
	397	0XF1
	398	)))
	399
	400	(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.
	401
	402	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	403	\|=(% 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
	404	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	405	0X00
	406	)))\|(% style="width:68px" %)0X21\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XDB\|(% style="width:55px" %)(((
	407	0X31
	408	)))
	409
	410	(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.
	411
	412	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	413	\|=(% 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
	414	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	415	0X00
	416	)))\|(% style="width:68px" %)0X22\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X2B\|(% style="width:55px" %)(((
	417	0X31
	418	)))
	419
	420	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.
	421
	422
8.1	423	= 3. DR-ORP1 Water ORP Sensor =
	424
27.2	425
28.2	426	== 3.1 Specification ==
27.2	427
	428	* Power Input: DC7~~30
32.1	429	* Measuring range: -1999~~1999mV
	430	Resolution: 1mV
27.2	431	* Interface: RS485. 9600 Baud Rate
	432	* Measurement error: ±3mV
	433	* Stability: ≤2mv/24 hours
	434	* Equipment working conditions: Ambient temperature: 0-60℃ Relative humidity: <85%RH
	435	* IP Rated: IP68
	436	* Max Pressure: 0.6MPa
	437
	438	== 3.2 Wiring ==
	439
45.1	440	[[image:image-20240720172620-3.png\|\|height="378" width="620"]]
27.2	441
45.1	442
27.2	443	== 3.3 Mechinical Drawing ==
	444
	445	[[image:image-20240714174241-2.png]]
	446
	447	== 3.4 Installation Notice ==
	448
	449	Do not power on while connect the cables. Double check the wiring before power on.
	450
	451	Installation Photo as reference:
	452
	453	~ Submerged installation:
	454
	455	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.
	456
	457	[[image:image-20240718191348-6.png]]
	458
	459	~ Pipeline installation:
	460
	461	Connect the equipment to the pipeline through the 3/4 thread.
	462
	463	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
	464
	465
39.1	466	== 3.5 Maintenance ==
8.1	467
9.1	468
29.1	469	(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	470
29.1	471	(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	472
29.1	473	(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	474
29.1	475	(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	476
29.1	477	(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	478
29.1	479	(6) The electrode should be cleaned with deionized water before and after the measurement to ensure the measurement accuracy.
32.3	480
29.1	481	(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	482
29.1	483	(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	484
29.1	485	(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.
	486
	487	== 3.6 RS485 Commands ==
	488
	489
	490	RS485 signaldefault address 0x13
	491	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	492
33.2	493	=== 3.6.1 Query address ===
29.1	494
	495	send
	496
	497	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	498	\|=(% 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
	499	\|(% 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
	500
	501	response
	502
	503	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	504	\|=(% 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
	505	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	506
	507	=== 3.6.2 Change address ===
	508
	509	For example: Change the address of the sensor with address 1 to 2, master → slave
	510
	511	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	512	\|=(% 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
	513	\|(% 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
	514
	515	If the sensor receives correctly, the data is returned along the original path.
	516	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.
	517
	518
	519	=== 3.6.3 Modify intercept ===
	520
	521	send
	522
	523	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
35.1	524	\|=(% 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	525	\|(% 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" %)(((
	526	0X96
	527	)))
	528
	529	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	530
	531	response
	532
	533	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	534	\|=(% 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
	535	\|(% style="width:99px" %)0X13\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	536	0X00
	537	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	538	0X96
	539	)))
	540
	541	=== 3.6.4 Query data ===
	542
9.1	543
37.1	544	Query the data (ORP) of the sensor (address 13), host → slave
35.1	545
	546	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	547	\|=(% 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
	548	\|(% 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
	549
	550	If the sensor receives correctly, the following data will be returned, slave → host
	551
	552	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	553	\|=(% 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
	554	\|(% 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
	555
11.1	556	The query data command is 13 03 00 00 00 01 87 78
10.1	557
11.1	558	For example, the returned data is 13 03 02 (% style="color:red" %)02 AE(%%) 80 9B.
10.1	559
11.1	560	02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
	561
	562
29.1	563	=== 3.6.5 Calibration Method ===
	564
	565	This device uses two-point calibration, and two known ORP standard solutions need to be prepared. The calibration steps are as follows:
	566	(1) Place the electrode in distilled water to clean it, and then place it in 86mV standard buffer solution. After the data stabilizes,
	567	enter the following calibration command, and the 86mV point calibration is completed;
	568
	569	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	570	\|=(% 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
	571	\|(% style="width:64px" %)0X13\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	572	0X00
	573	)))\|(% style="width:68px" %)0X24\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XCB\|(% style="width:55px" %)(((
	574	0X03
	575	)))
	576
	577	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.
	578
	579	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	580	\|=(% 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
	581	\|(% style="width:64px" %)0X13\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	582	0X00
	583	)))\|(% style="width:68px" %)0X25\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X9A\|(% style="width:55px" %)(((
	584	0XC3
	585	)))
	586
8.1	587	= 4. DR-DO1 Dissolved Oxygen Sensor =
	588
	589
11.1	590
32.1	591	== 4.1 Specification ==
	592
33.2	593
	594	* Measuring range: 0-20mg/L, 0-50℃
	595	* Accuracy: 3%, ±0.5℃
	596	* Resolution: 0.01 mg/L, 0.01℃
	597	* Maximum operating pressure: 6 bar
	598	* Output signal: A: 4-20mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
	599	* Power supply voltage: 5-24V DC
	600	* Working environment: temperature 0-60℃; humidity <95%RH
32.1	601	* Power consumption: ≤0.5W
	602
33.2	603	== 4.2 wiring ==
32.1	604
45.1	605	[[image:image-20240720172632-4.png\|\|height="390" width="640"]]
33.2	606
	607
	608	== (% id="cke_bm_224234S" style="display:none" %) (%%)4.3 Impedance requirements for current signals ==
	609
32.1	610	[[image:image-20240718195414-8.png\|\|height="100" width="575"]]
	611
	612
	613	== 4.4 Mechinical Drawing ==
	614
	615
33.2	616	[[image:image-20240719155308-1.png\|\|height="226" width="527"]]
32.1	617
33.2	618
39.1	619	== 4.5 Instructions for use and maintenance ==
32.1	620
	621	* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
	622	* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	623
	624	== 4.6 RS485 Commands ==
	625
34.1	626	RS485 signaldefault address 0x14
	627	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	628
32.3	629	=== 4.6.1 Query address ===
32.1	630
32.3	631	send
	632
	633	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
34.1	634	\|=(% 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
	635	\|(% 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	636
34.1	637	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	638
	639
	640	response
	641
34.1	642	Register 0 data high and register 0 data low indicate the actual address of the sensor: 1
	643	Register 1 data high and register 1 data low indicate the sensor version
32.3	644
34.1	645	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	646	\|=(% 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
	647	\|(% 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
	648
33.2	649	=== 4.6.2 Change address ===
32.3	650
34.1	651	For example: Change the address of the sensor with address 1 to 2(address range: 1-119), master → slave
33.2	652
	653	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:907.333px" %)
	654	\|=(% 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
	655	\|(% 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
	656
34.1	657	response
32.3	658
34.1	659	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	660	\|=(% 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
	661	\|(% 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	662
34.1	663	=== 4.6.3 Query data ===
9.1	664
	665
34.2	666	Query the data (dissolved oxygen) of the sensor (address 14), host → slave
34.1	667
	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" %)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
	671
34.2	672	If the sensor receives correctly, the following data will be returned, slave → host
34.1	673
	674	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	675	\|=(% 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	676	\|(% 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	677
11.1	678	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	679
	680	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
	681
11.1	682
34.2	683	Query the data (temperature) of the sensor (address 14), host → slave
	684
	685	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	686	\|=(% 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
	687	\|(% 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
	688
	689	If the sensor receives correctly, the following data will be returned, slave → host
	690
	691	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	692	\|=(% 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
	693	\|(% 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
	694
	695	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.
	696
	697	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℃
	698
	699
8.1	700	= 5. DR-TS1 Water Turbidity Sensor =
	701
9.1	702
10.1	703
32.3	704	== (% id="cke_bm_81470S" style="display:none" %) (%%)5.1 Specification ==
	705
	706	* Measuring range: 0.1～1000.0NTU
	707	* Accuracy: ±5%
	708	* Resolution: 0.1NTU
	709	* Stability: ≤3mV/24 hours
	710	* Output signal: A: 4～20 mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
	711	* Power supply voltage: 5～24V DC (when output signal is RS485)12～24V DC (when output signal is 4～20mA)
	712	* Working environment: temperature 0～60℃; humidity ≤95%RH
	713	* Power consumption: ≤0.5W
	714
	715	== 5.2 wiring ==
	716
45.1	717	[[image:image-20240720172640-5.png\|\|height="387" width="635"]]
32.3	718
45.1	719
32.3	720	== 5.3 Impedance requirements for current signals ==
	721
	722	[[image:image-20240718195414-8.png\|\|height="100" width="575"]]
	723
	724
	725	== 5.4 Mechinical Drawing ==
	726
	727	[[image:image-20240718195058-7.png\|\|height="305" width="593"]]
	728
	729
39.1	730	== 5.5 Instructions for use and maintenance ==
32.3	731
	732	* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
	733	* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	734
	735	== 5.6 RS485 Commands ==
	736
	737
36.1	738	RS485 signaldefault address 0x15
	739	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	740
	741	=== 5.6.1 Query address ===
	742
32.3	743	send
	744
	745	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	746	\|=(% 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
	747	\|(% 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
	748
	749	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.
	750
	751
	752	response
	753
	754	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	755	\|=(% 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
	756	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	757
36.1	758	=== 5.6.2 Change address ===
32.3	759
36.1	760	For example: Change the address of the sensor with address 1 to 2, master → slave
10.1	761
36.1	762	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	763	\|=(% 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
	764	\|(% 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
	765
	766	If the sensor receives correctly, the data is returned along the original path.
	767	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.
	768
	769	=== 5.6.3 Query data ===
	770
	771
	772	Query the data (turbidity) of the sensor (address 15), host → slave
	773
	774	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	775	\|=(% 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
	776	\|(% 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
	777
	778	If the sensor receives correctly, the following data will be returned, slave → host
	779
	780	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	781	\|=(% 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
	782	\|(% 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
	783
11.1	784	The query data command is 15 03 00 00 00 01 87 1E
10.1	785
11.1	786	For example, the returned data is 15 03 02 (% style="color:red" %)02 9A(%%) 09 4C
	787
	788	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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