Wiki source code of Water Quality Sensors

Version 45.11 by Xiaoling on 2024/08/06 10:46

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
	28
7.1	29	== 1.2 Application for Different Range ==
	30
45.2	31
7.1	32	[[image:image-20240714173018-1.png]]
	33
	34
	35	== 1.3 Wiring ==
	36
45.2	37
45.1	38	[[image:image-20240720172533-1.png\|\|height="347" width="569"]]
7.1	39
45.1	40
7.1	41	== 1.4 Mechinical Drawing ==
	42
45.2	43
7.1	44	[[image:image-20240714174241-2.png]]
	45
	46
	47	== 1.5 Installation ==
	48
	49
45.2	50	Electrode installation form:
15.2	51
45.2	52	A: Side wall installation
15.2	53
45.2	54	B: Top flange installation
15.2	55
45.2	56	C: Pipeline bend installation
15.2	57
45.2	58	D: Pipeline bend installation
15.2	59
45.2	60	E: Flow-through installation
15.2	61
45.2	62	F: Submerged installation
15.2	63
23.1	64	[[image:image-20240718190121-1.png\|\|height="350" width="520"]]
15.2	65
18.1	66	Several common installation methods of electrodes
15.2	67
18.1	68	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	69
18.1	70	A. Several common incorrect installation methods
15.2	71
23.1	72	[[image:image-20240718190204-2.png\|\|height="262" width="487"]]
15.2	73
45.2	74	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	75
23.1	76	[[image:image-20240718190221-3.png\|\|height="292" width="500"]]
18.1	77
45.2	78	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	79
	80	B. Correct installation method
	81
23.1	82	[[image:image-20240718190249-4.png\|\|height="287" width="515"]]
18.1	83
	84
38.1	85	== 1.6 Maintenance ==
7.1	86
	87
26.1	88	* 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.
	89	* 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.
	90	* 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.
	91	* 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	92
45.2	93
	94
8.1	95	== 1.7 RS485 Commands ==
	96
15.2	97
	98	RS485 signal (K1 default address 0x12; K10 default address 0x11):
	99	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	100
	101
16.1	102	=== 1.7.1 Query address ===
8.1	103
11.1	104
45.2	105	send
	106
	107	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.11	108	\|=(% style="width: 70px;background-color:#4F81BD;color:white" %)Original address\|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 62px; 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
	109	\|(% style="width:99px" %)0XFE \|(% style="width:72px" %)0X03\|(% style="width:64px" %)0X00\|(% style="width:68px" %)0X50\|(% style="width:70px" %)0X00\|(% style="width:70px" %)0X00\|(% style="width:56px" %)0X51\|(% style="width:56px" %)0XD4
16.1	110
	111	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.
	112
	113
45.2	114	response
16.1	115
45.3	116	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)
45.10	117	\|=(% 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	118	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
16.1	119
45.2	120
	121
16.1	122	=== 1.7.2 Change address ===
	123
45.2	124
16.1	125	For example: Change the address of the sensor with address 1 to 2, master → slave
	126
32.2	127	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	128	\|=(% style="width: 69px; background-color: rgb(79, 129, 189); color: white;" %)Original address\|=(% style="width: 76px; background-color: rgb(79, 129, 189); color: white;" %)Function code\|=(% style="width: 67px; 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: 73px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high\|=(% style="width: 73px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low\|=(% style="width: 57px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low\|=(% style="width: 56px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	129	\|(% style="width:69px" %)0X01\|(% style="width:76px" %)0X06\|(% style="width:67px" %)0X00\|(% style="width:68px" %)0X50\|(% style="width:73px" %)0X00\|(% style="width:73px" %)0X02\|(% style="width:57px" %)0X08\|(% style="width:56px" %)0X1A
16.1	130
	131	If the sensor receives correctly, the data is returned along the original path.
	132	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.
	133
	134
	135	=== 1.7.3 Modify intercept ===
	136
	137
	138	send
	139
	140	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	141	\|=(% 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	142	\|(% 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" %)(((
	143	0X07
16.1	144	)))
	145
	146	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	147
	148	response
	149
	150	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	151	\|=(% 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
	152	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	153	0X02
27.1	154	)))\|(% style="width:126px" %)0X00\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X0A\|(% style="width:1px" %)0X38\|(% style="width:1px" %)(((
	155	0X8F
16.1	156	)))
	157
	158	=== 1.7.4 Query data ===
	159
37.1	160
	161
	162	Query the data (EC,temperature) of the sensor (address 11), host → slave
	163
	164	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	165	\|=(% 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
	166	\|(% 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
	167
	168	If the sensor receives correctly, the following data will be returned, slave → host
	169
	170	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	171	\|=(% 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
	172	\|(% 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
	173
16.3	174	The address of the EC K10 sensor is 11
16.1	175
10.1	176	The query data command is 11 03 00 00 00 02 C6 9B
	177
37.1	178	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	179
	180
37.1	181	Query the data (EC,temperature) of the sensor (address 11), host → slave
	182
	183	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	184	\|=(% 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
	185	\|(% 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
	186
	187	If the sensor receives correctly, the following data will be returned, slave → host
	188
	189	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	190	\|=(% 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
	191	\|(% 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
	192
10.1	193	The address of the EC K1 sensor is 12
	194
	195	The query data command is 12 03 00 00 00 02 C6 A8
	196
37.1	197	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	198
11.1	199
16.2	200	=== 1.7.5 Calibration Method ===
12.1	201
	202
15.1	203	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	204
15.1	205	The calibration steps are as follows:
	206	(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.
	207
14.1	208	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	209	\|=(% 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
	210	\|(% 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" %)(((
	211	0X00
12.1	212
14.1	213	0X00
	214
	215	0X37
	216
	217	0X32
	218	)))\|(% style="width:1px" %)0XBD\|(% style="width:1px" %)0XFC
	219
15.1	220	1413*10 gives 0X00003732
14.1	221
16.1	222	response
15.1	223
13.1	224	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
14.1	225	\|=(% 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
	226	\|(% 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
	227
	228	(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
	229
	230	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
13.1	231	\|=(% 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	232	\|(% 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" %)(((
	233	0X00
12.1	234
14.1	235	0X01
	236
	237	0XF7
	238
	239	0X20
	240	)))\|(% style="width:1px" %)0X33\|(% style="width:1px" %)0X75
	241
15.1	242	12880*10 gives 0X01F720
	243
16.1	244	response
14.1	245
	246	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	247	\|=(% 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
	248	\|(% 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
	249
8.1	250	= 2. DR-PH01 Water PH Sensor =
	251
	252
28.2	253	== 2.1 Specification ==
9.1	254
26.1	255	* Power Input: DC7~~30
	256	* Power Consumption : < 0.5W
	257	* Interface: RS485. 9600 Baud Rate
	258	* pH measurement range: 0~~14.00pH; resolution: 0.01pH
	259	* pH measurement error:±0.15pH
	260	* Repeatability error:±0.02pH
	261	* Temperature measurement range:0~~60℃; resolution: 0.1℃ (set temperature for manual temperature compensation, default 25℃)
	262	* Temperature measurement error: ±0.5℃
	263	* Temperature Measure Range: -20 ~~ 60 °C
	264	* Temperature Accuracy: ±0.5 °C
	265	* IP Rated: IP68
	266	* Max Pressure: 0.6MPa
	267
	268	== 2.2 Wiring ==
	269
45.1	270	[[image:image-20240720172548-2.png\|\|height="348" width="571"]]
26.1	271
45.1	272
26.1	273	== (% style="color:inherit; font-family:inherit" %)2.3 (% style="color:inherit; font-family:inherit; font-size:26px" %)Mechinical Drawing(%%) ==
	274
	275	[[image:image-20240714174241-2.png]]
	276
	277
	278	== 2.4 Installation Notice ==
	279
	280	Do not power on while connect the cables. Double check the wiring before power on.
	281
	282	Installation Photo as reference:
	283
	284	~ Submerged installation:
	285
	286	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.
	287
	288	[[image:image-20240718191348-6.png]]
	289
	290	~ Pipeline installation:
	291
	292	Connect the equipment to the pipeline through the 3/4 thread.
	293
	294	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
	295
	296	Sampling:
	297
	298	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.
	299
	300	Measure the pH of the water sample:
	301
	302	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.
	303
	304
39.1	305	== 2.5 Maintenance ==
26.1	306
	307
	308	* 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!
	309	* 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.
	310	* 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.
	311	* 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.
	312	* 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.
	313	* The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
	314	* 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.
	315	* 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.
	316	* (((
	317	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.
	318	)))
	319
	320	== 2.6 RS485 Commands ==
	321
27.1	322	RS485 signaldefault address 0x10
	323	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
26.1	324
33.2	325	=== 2.6.1 Query address ===
27.1	326
	327	send
	328
	329	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	330	\|=(% 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
	331	\|(% 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
	332
	333	response
	334
	335	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	336	\|=(% 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
	337	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	338
	339	=== 2.6.2 Change address ===
	340
	341	For example: Change the address of the sensor with address 1 to 2, master → slave
	342
	343	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	344	\|=(% 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
	345	\|(% 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
	346
	347	If the sensor receives correctly, the data is returned along the original path.
	348	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.
	349
	350
	351	=== 2.6.3 Modify intercept ===
	352
	353
	354	send
	355
34.3	356	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:570.333px" %)
	357	\|=(% 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
	358	\|(% 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	359	0XA5
	360	)))
	361
34.4	362	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	363
	364	response
	365
	366	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	367	\|=(% 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
	368	\|(% style="width:99px" %)0X10\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	369	0X00
	370	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	371	0XA5
	372	)))
	373
	374	=== 2.6.4 Query data ===
	375
	376
34.3	377	Query the data (PH) of the sensor (address 10), host → slave
9.1	378
34.3	379	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	380	\|=(% 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
	381	\|(% 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
	382
	383	If the sensor receives correctly, the following data will be returned, slave → host
	384
	385	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	386	\|=(% 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	387	\|(% 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	388
11.1	389	The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
10.1	390
11.1	391	For example, the returned data is 10 03 02 (% style="color:red" %)02 AE(%%) C4 9B.
	392
	393	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.
	394
	395
27.1	396	=== 2.6.5 Calibration Method ===
	397
	398
	399	This device uses three-point calibration, and three known pH standard solutions need to be prepared.
	400	The calibration steps are as follows:
	401	(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.
	402
	403	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	404	\|=(% 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
	405	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	406	0X00
	407	)))\|(% style="width:68px" %)0X20\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X8A\|(% style="width:55px" %)(((
	408	0XF1
	409	)))
	410
	411	(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.
	412
	413	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	414	\|=(% 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
	415	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	416	0X00
	417	)))\|(% style="width:68px" %)0X21\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XDB\|(% style="width:55px" %)(((
	418	0X31
	419	)))
	420
	421	(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.
	422
	423	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	424	\|=(% 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
	425	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	426	0X00
	427	)))\|(% style="width:68px" %)0X22\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X2B\|(% style="width:55px" %)(((
	428	0X31
	429	)))
	430
	431	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.
	432
	433
8.1	434	= 3. DR-ORP1 Water ORP Sensor =
	435
27.2	436
28.2	437	== 3.1 Specification ==
27.2	438
	439	* Power Input: DC7~~30
32.1	440	* Measuring range: -1999~~1999mV
	441	Resolution: 1mV
27.2	442	* Interface: RS485. 9600 Baud Rate
	443	* Measurement error: ±3mV
	444	* Stability: ≤2mv/24 hours
	445	* Equipment working conditions: Ambient temperature: 0-60℃ Relative humidity: <85%RH
	446	* IP Rated: IP68
	447	* Max Pressure: 0.6MPa
	448
	449	== 3.2 Wiring ==
	450
45.1	451	[[image:image-20240720172620-3.png\|\|height="378" width="620"]]
27.2	452
45.1	453
27.2	454	== 3.3 Mechinical Drawing ==
	455
	456	[[image:image-20240714174241-2.png]]
	457
	458	== 3.4 Installation Notice ==
	459
	460	Do not power on while connect the cables. Double check the wiring before power on.
	461
	462	Installation Photo as reference:
	463
	464	~ Submerged installation:
	465
	466	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.
	467
	468	[[image:image-20240718191348-6.png]]
	469
	470	~ Pipeline installation:
	471
	472	Connect the equipment to the pipeline through the 3/4 thread.
	473
	474	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
	475
	476
39.1	477	== 3.5 Maintenance ==
8.1	478
9.1	479
29.1	480	(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	481
29.1	482	(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	483
29.1	484	(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	485
29.1	486	(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	487
29.1	488	(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	489
29.1	490	(6) The electrode should be cleaned with deionized water before and after the measurement to ensure the measurement accuracy.
32.3	491
29.1	492	(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	493
29.1	494	(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	495
29.1	496	(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.
	497
	498	== 3.6 RS485 Commands ==
	499
	500
	501	RS485 signaldefault address 0x13
	502	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	503
33.2	504	=== 3.6.1 Query address ===
29.1	505
	506	send
	507
	508	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	509	\|=(% 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
	510	\|(% 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
	511
	512	response
	513
	514	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	515	\|=(% 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
	516	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	517
	518	=== 3.6.2 Change address ===
	519
	520	For example: Change the address of the sensor with address 1 to 2, master → slave
	521
	522	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	523	\|=(% 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
	524	\|(% 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
	525
	526	If the sensor receives correctly, the data is returned along the original path.
	527	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.
	528
	529
	530	=== 3.6.3 Modify intercept ===
	531
	532	send
	533
	534	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
35.1	535	\|=(% 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	536	\|(% 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" %)(((
	537	0X96
	538	)))
	539
	540	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	541
	542	response
	543
	544	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	545	\|=(% 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
	546	\|(% style="width:99px" %)0X13\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	547	0X00
	548	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	549	0X96
	550	)))
	551
	552	=== 3.6.4 Query data ===
	553
9.1	554
37.1	555	Query the data (ORP) of the sensor (address 13), host → slave
35.1	556
	557	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	558	\|=(% 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
	559	\|(% 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
	560
	561	If the sensor receives correctly, the following data will be returned, slave → host
	562
	563	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	564	\|=(% 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
	565	\|(% 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
	566
11.1	567	The query data command is 13 03 00 00 00 01 87 78
10.1	568
11.1	569	For example, the returned data is 13 03 02 (% style="color:red" %)02 AE(%%) 80 9B.
10.1	570
11.1	571	02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
	572
	573
29.1	574	=== 3.6.5 Calibration Method ===
	575
	576	This device uses two-point calibration, and two known ORP standard solutions need to be prepared. The calibration steps are as follows:
	577	(1) Place the electrode in distilled water to clean it, and then place it in 86mV standard buffer solution. After the data stabilizes,
	578	enter the following calibration command, and the 86mV point calibration is completed;
	579
	580	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	581	\|=(% 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
	582	\|(% style="width:64px" %)0X13\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	583	0X00
	584	)))\|(% style="width:68px" %)0X24\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XCB\|(% style="width:55px" %)(((
	585	0X03
	586	)))
	587
	588	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.
	589
	590	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	591	\|=(% 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
	592	\|(% style="width:64px" %)0X13\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	593	0X00
	594	)))\|(% style="width:68px" %)0X25\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X9A\|(% style="width:55px" %)(((
	595	0XC3
	596	)))
	597
8.1	598	= 4. DR-DO1 Dissolved Oxygen Sensor =
	599
	600
11.1	601
32.1	602	== 4.1 Specification ==
	603
33.2	604
	605	* Measuring range: 0-20mg/L, 0-50℃
	606	* Accuracy: 3%, ±0.5℃
	607	* Resolution: 0.01 mg/L, 0.01℃
	608	* Maximum operating pressure: 6 bar
	609	* Output signal: A: 4-20mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
	610	* Power supply voltage: 5-24V DC
	611	* Working environment: temperature 0-60℃; humidity <95%RH
32.1	612	* Power consumption: ≤0.5W
	613
33.2	614	== 4.2 wiring ==
32.1	615
45.1	616	[[image:image-20240720172632-4.png\|\|height="390" width="640"]]
33.2	617
	618
	619	== (% id="cke_bm_224234S" style="display:none" %) (%%)4.3 Impedance requirements for current signals ==
	620
32.1	621	[[image:image-20240718195414-8.png\|\|height="100" width="575"]]
	622
	623
	624	== 4.4 Mechinical Drawing ==
	625
	626
33.2	627	[[image:image-20240719155308-1.png\|\|height="226" width="527"]]
32.1	628
33.2	629
39.1	630	== 4.5 Instructions for use and maintenance ==
32.1	631
	632	* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
	633	* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	634
	635	== 4.6 RS485 Commands ==
	636
34.1	637	RS485 signaldefault address 0x14
	638	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	639
32.3	640	=== 4.6.1 Query address ===
32.1	641
32.3	642	send
	643
	644	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
34.1	645	\|=(% 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
	646	\|(% 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	647
34.1	648	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	649
	650
	651	response
	652
34.1	653	Register 0 data high and register 0 data low indicate the actual address of the sensor: 1
	654	Register 1 data high and register 1 data low indicate the sensor version
32.3	655
34.1	656	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	657	\|=(% 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
	658	\|(% 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
	659
33.2	660	=== 4.6.2 Change address ===
32.3	661
34.1	662	For example: Change the address of the sensor with address 1 to 2(address range: 1-119), master → slave
33.2	663
	664	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:907.333px" %)
	665	\|=(% 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
	666	\|(% 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
	667
34.1	668	response
32.3	669
34.1	670	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	671	\|=(% 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
	672	\|(% 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	673
34.1	674	=== 4.6.3 Query data ===
9.1	675
	676
34.2	677	Query the data (dissolved oxygen) of the sensor (address 14), host → slave
34.1	678
	679	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	680	\|=(% 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
	681	\|(% 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
	682
34.2	683	If the sensor receives correctly, the following data will be returned, slave → host
34.1	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: 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	687	\|(% 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	688
11.1	689	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	690
	691	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
	692
11.1	693
34.2	694	Query the data (temperature) of the sensor (address 14), host → slave
	695
	696	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	697	\|=(% 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
	698	\|(% 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
	699
	700	If the sensor receives correctly, the following data will be returned, slave → host
	701
	702	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	703	\|=(% 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
	704	\|(% 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
	705
	706	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.
	707
	708	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℃
	709
	710
8.1	711	= 5. DR-TS1 Water Turbidity Sensor =
	712
9.1	713
10.1	714
32.3	715	== (% id="cke_bm_81470S" style="display:none" %) (%%)5.1 Specification ==
	716
	717	* Measuring range: 0.1～1000.0NTU
	718	* Accuracy: ±5%
	719	* Resolution: 0.1NTU
	720	* Stability: ≤3mV/24 hours
	721	* Output signal: A: 4～20 mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
	722	* Power supply voltage: 5～24V DC (when output signal is RS485)12～24V DC (when output signal is 4～20mA)
	723	* Working environment: temperature 0～60℃; humidity ≤95%RH
	724	* Power consumption: ≤0.5W
	725
	726	== 5.2 wiring ==
	727
45.1	728	[[image:image-20240720172640-5.png\|\|height="387" width="635"]]
32.3	729
45.1	730
32.3	731	== 5.3 Impedance requirements for current signals ==
	732
	733	[[image:image-20240718195414-8.png\|\|height="100" width="575"]]
	734
	735
	736	== 5.4 Mechinical Drawing ==
	737
	738	[[image:image-20240718195058-7.png\|\|height="305" width="593"]]
	739
	740
39.1	741	== 5.5 Instructions for use and maintenance ==
32.3	742
	743	* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
	744	* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	745
	746	== 5.6 RS485 Commands ==
	747
	748
36.1	749	RS485 signaldefault address 0x15
	750	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	751
	752	=== 5.6.1 Query address ===
	753
32.3	754	send
	755
	756	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	757	\|=(% 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
	758	\|(% 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
	759
	760	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.
	761
	762
	763	response
	764
	765	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	766	\|=(% 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
	767	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	768
36.1	769	=== 5.6.2 Change address ===
32.3	770
36.1	771	For example: Change the address of the sensor with address 1 to 2, master → slave
10.1	772
36.1	773	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	774	\|=(% 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
	775	\|(% 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
	776
	777	If the sensor receives correctly, the data is returned along the original path.
	778	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.
	779
	780	=== 5.6.3 Query data ===
	781
	782
	783	Query the data (turbidity) of the sensor (address 15), host → slave
	784
	785	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	786	\|=(% 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
	787	\|(% 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
	788
	789	If the sensor receives correctly, the following data will be returned, slave → host
	790
	791	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:599.333px" %)
	792	\|=(% 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
	793	\|(% 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
	794
11.1	795	The query data command is 15 03 00 00 00 01 87 1E
10.1	796
11.1	797	For example, the returned data is 15 03 02 (% style="color:red" %)02 9A(%%) 09 4C
	798
	799	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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