Wiki source code of Water Quality Sensors

Version 28.2 by Karry Zhuang on 2024/07/18 19:37

version	line-number	content
1.1	1	Table of Contents:
	2
	3	{{toc/}}
	4
	5
7.1	6	= 1. DR-ECK Water EC Probe =
	7
	8	== 1.1 Specification: ==
	9
	10	* Power Input: DC7~~30
	11	* Power Consumption : < 0.5W
	12	* Interface: RS485. 9600 Baud Rate
	13	* EC Range & Resolution:
	14	ECK0.01** : 0.02 ~~ 20 μS/cm
	15	ECK0.1**: 0.2 ~~ 200.0 μS/cm
	16	ECK1.0** : 2 ~~ 2,000 μS/cm Resolution: 1 μS/cm
	17	ECK10.0** : 20 ~~ 20,000 μS/cm Resolution: 10 μS/cm
	18	* EC Accuracy: ±1% FS
	19	* Temperature Measure Range: -20 ~~ 60 °C
	20	* Temperature Accuracy: ±0.5 °C
	21	* IP Rated: IP68
	22	* Max Pressure: 0.6MPa
	23
	24	== 1.2 Application for Different Range ==
	25
	26	[[image:image-20240714173018-1.png]]
	27
	28
	29	== 1.3 Wiring ==
	30
	31
	32	== 1.4 Mechinical Drawing ==
	33
	34	[[image:image-20240714174241-2.png]]
	35
	36
	37	== 1.5 Installation ==
	38
	39
18.1	40	Electrode installation form
15.2	41
18.1	42	A:Side wall installation
15.2	43
18.1	44	B:Top flange installation
15.2	45
18.1	46	C:Pipeline bend installation
15.2	47
18.1	48	D:Pipeline bend installation
15.2	49
18.1	50	E:Flow-through installation
15.2	51
18.1	52	F:Submerged installation
15.2	53
23.1	54	[[image:image-20240718190121-1.png\|\|height="350" width="520"]]
15.2	55
18.1	56	Several common installation methods of electrodes
15.2	57
18.1	58	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	59
18.1	60	A. Several common incorrect installation methods
15.2	61
23.1	62	[[image:image-20240718190204-2.png\|\|height="262" width="487"]]
15.2	63
18.1	64	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	65
23.1	66	[[image:image-20240718190221-3.png\|\|height="292" width="500"]]
18.1	67
	68	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.
	69
	70	B. Correct installation method
	71
23.1	72	[[image:image-20240718190249-4.png\|\|height="287" width="515"]]
18.1	73
	74
7.1	75	== 1.6 Maintain ==
	76
	77
26.1	78	* 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.
	79	* 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.
	80	* 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.
	81	* 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	82
8.1	83	== 1.7 RS485 Commands ==
	84
15.2	85
	86	RS485 signal (K1 default address 0x12; K10 default address 0x11):
	87	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	88
	89
16.1	90	=== 1.7.1 Query address ===
8.1	91
16.1	92	send
11.1	93
16.1	94	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	95	\|=(% 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
	96	\|(% 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
	97
	98	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.
	99
	100
	101	response
	102
	103	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	104	\|=(% 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
27.1	105	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
16.1	106
	107	=== 1.7.2 Change address ===
	108
	109	For example: Change the address of the sensor with address 1 to 2, master → slave
	110
	111	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	112	\|=(% 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
	113	\|(% 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
	114
	115	If the sensor receives correctly, the data is returned along the original path.
	116	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.
	117
	118
	119	=== 1.7.3 Modify intercept ===
	120
	121
	122	send
	123
	124	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	125	\|=(% 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	126	\|(% 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" %)(((
	127	0X07
16.1	128	)))
	129
	130	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	131
	132	response
	133
	134	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	135	\|=(% 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
	136	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	137	0X02
27.1	138	)))\|(% style="width:126px" %)0X00\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X0A\|(% style="width:1px" %)0X38\|(% style="width:1px" %)(((
	139	0X8F
16.1	140	)))
	141
	142	=== 1.7.4 Query data ===
	143
16.3	144	The address of the EC K10 sensor is 11
16.1	145
10.1	146	The query data command is 11 03 00 00 00 02 C6 9B
	147
11.1	148	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
10.1	149
	150
	151	The address of the EC K1 sensor is 12
	152
	153	The query data command is 12 03 00 00 00 02 C6 A8
	154
16.1	155	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
10.1	156
11.1	157
16.2	158	=== 1.7.5 Calibration Method ===
12.1	159
	160
15.1	161	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	162
15.1	163	The calibration steps are as follows:
	164	(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.
	165
14.1	166	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	167	\|=(% 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
	168	\|(% 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" %)(((
	169	0X00
12.1	170
14.1	171	0X00
	172
	173	0X37
	174
	175	0X32
	176	)))\|(% style="width:1px" %)0XBD\|(% style="width:1px" %)0XFC
	177
15.1	178	1413*10 gives 0X00003732
14.1	179
16.1	180	response
15.1	181
13.1	182	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
14.1	183	\|=(% 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
	184	\|(% 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
	185
	186	(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
	187
	188	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
13.1	189	\|=(% 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	190	\|(% 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" %)(((
	191	0X00
12.1	192
14.1	193	0X01
	194
	195	0XF7
	196
	197	0X20
	198	)))\|(% style="width:1px" %)0X33\|(% style="width:1px" %)0X75
	199
15.1	200	12880*10 gives 0X01F720
	201
16.1	202	response
14.1	203
	204	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	205	\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address high\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Quantity high\|=(% style="width: 1px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 low\|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
	206	\|(% 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
	207
8.1	208	= 2. DR-PH01 Water PH Sensor =
	209
	210
28.2	211	== 2.1 Specification ==
9.1	212
26.1	213	* Power Input: DC7~~30
	214	* Power Consumption : < 0.5W
	215	* Interface: RS485. 9600 Baud Rate
	216	* pH measurement range: 0~~14.00pH; resolution: 0.01pH
	217	* pH measurement error:±0.15pH
	218	* Repeatability error:±0.02pH
	219	* Temperature measurement range:0~~60℃; resolution: 0.1℃ (set temperature for manual temperature compensation, default 25℃)
	220	* Temperature measurement error: ±0.5℃
	221	* Temperature Measure Range: -20 ~~ 60 °C
	222	* Temperature Accuracy: ±0.5 °C
	223	* IP Rated: IP68
	224	* Max Pressure: 0.6MPa
	225
	226	== 2.2 Wiring ==
	227
	228
	229	== (% style="color:inherit; font-family:inherit" %)2.3 (% style="color:inherit; font-family:inherit; font-size:26px" %)Mechinical Drawing(%%) ==
	230
	231	[[image:image-20240714174241-2.png]]
	232
	233
	234	== 2.4 Installation Notice ==
	235
	236	Do not power on while connect the cables. Double check the wiring before power on.
	237
	238	Installation Photo as reference:
	239
	240	~ Submerged installation:
	241
	242	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.
	243
	244	[[image:image-20240718191348-6.png]]
	245
	246	~ Pipeline installation:
	247
	248	Connect the equipment to the pipeline through the 3/4 thread.
	249
	250	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
	251
	252	Sampling:
	253
	254	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.
	255
	256	Measure the pH of the water sample:
	257
	258	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.
	259
	260
	261	=== 2.5 Maintenance ===
	262
	263
	264	* 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!
	265	* 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.
	266	* 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.
	267	* 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.
	268	* 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.
	269	* The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
	270	* 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.
	271	* 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.
	272	* (((
	273	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.
	274	)))
	275
	276	== 2.6 RS485 Commands ==
	277
27.1	278	RS485 signaldefault address 0x10
	279	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
26.1	280
27.1	281	=== 2.6.1 Query data ===
	282
	283	send
	284
	285	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	286	\|=(% 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
	287	\|(% 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
	288
	289	response
	290
	291	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	292	\|=(% 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
	293	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X03\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	294
	295	=== 2.6.2 Change address ===
	296
	297	For example: Change the address of the sensor with address 1 to 2, master → slave
	298
	299	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	300	\|=(% 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
	301	\|(% 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
	302
	303	If the sensor receives correctly, the data is returned along the original path.
	304	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.
	305
	306
	307	=== 2.6.3 Modify intercept ===
	308
	309
	310	send
	311
	312	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	313	\|=(% 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
	314	\|(% style="width:99px" %)0X10\|(% 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" %)(((
	315	0XA5
	316	)))
	317
	318	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	319
	320	response
	321
	322	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	323	\|=(% 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
	324	\|(% style="width:99px" %)0X10\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	325	0X00
	326	)))\|(% style="width:126px" %)0X10\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X64\|(% style="width:1px" %)0X8A\|(% style="width:1px" %)(((
	327	0XA5
	328	)))
	329
	330	=== 2.6.4 Query data ===
	331
	332
11.1	333	The address of the pH sensor is 10
9.1	334
11.1	335	The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
10.1	336
11.1	337	For example, the returned data is 10 03 02 (% style="color:red" %)02 AE(%%) C4 9B.
	338
	339	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.
	340
	341
27.1	342	=== 2.6.5 Calibration Method ===
	343
	344
	345	This device uses three-point calibration, and three known pH standard solutions need to be prepared.
	346	The calibration steps are as follows:
	347	(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.
	348
	349	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	350	\|=(% 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
	351	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	352	0X00
	353	)))\|(% style="width:68px" %)0X20\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X8A\|(% style="width:55px" %)(((
	354	0XF1
	355	)))
	356
	357	(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.
	358
	359	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	360	\|=(% 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
	361	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	362	0X00
	363	)))\|(% style="width:68px" %)0X21\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0XDB\|(% style="width:55px" %)(((
	364	0X31
	365	)))
	366
	367	(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.
	368
	369	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	370	\|=(% 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
	371	\|(% style="width:64px" %)0X10\|(% style="width:72px" %)0X06\|(% style="width:66px" %)(((
	372	0X00
	373	)))\|(% style="width:68px" %)0X22\|(% style="width:72px" %)0XFF\|(% style="width:70px" %)0XFF\|(% style="width:55px" %)0X2B\|(% style="width:55px" %)(((
	374	0X31
	375	)))
	376
	377	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.
	378
	379
8.1	380	= 3. DR-ORP1 Water ORP Sensor =
	381
27.2	382
	383
28.2	384	== 3.1 Specification ==
27.2	385
	386	* Power Input: DC7~~30
	387	* Power Consumption : < 0.5W
	388	* Interface: RS485. 9600 Baud Rate
	389	* Measurement error: ±3mV
	390	* Stability: ≤2mv/24 hours
	391	* Equipment working conditions: Ambient temperature: 0-60℃ Relative humidity: <85%RH
	392	* IP Rated: IP68
	393	* Max Pressure: 0.6MPa
	394
	395	== 3.2 Wiring ==
	396
	397
	398	== 3.3 Mechinical Drawing ==
	399
	400	[[image:image-20240714174241-2.png]]
	401
	402	== 3.4 Installation Notice ==
	403
	404	Do not power on while connect the cables. Double check the wiring before power on.
	405
	406	Installation Photo as reference:
	407
	408	~ Submerged installation:
	409
	410	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.
	411
	412	[[image:image-20240718191348-6.png]]
	413
	414	~ Pipeline installation:
	415
	416	Connect the equipment to the pipeline through the 3/4 thread.
	417
	418	[[image:image-20240718191336-5.png\|\|height="239" width="326"]]
	419
	420
9.1	421	== 3.7 RS485 Commands ==
8.1	422
9.1	423
11.1	424	The address of the ORP sensor is 13
9.1	425
11.1	426	The query data command is 13 03 00 00 00 01 87 78
10.1	427
11.1	428	For example, the returned data is 13 03 02 (% style="color:red" %)02 AE(%%) 80 9B.
10.1	429
11.1	430	02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
	431
	432
8.1	433	= 4. DR-DO1 Dissolved Oxygen Sensor =
	434
9.1	435	== 4.7 RS485 Commands ==
8.1	436
11.1	437
10.1	438	The address of the dissolved oxygen sensor is 14
9.1	439
10.1	440	The query data command is 14 03 00 14 00 01 C6 CB
9.1	441
11.1	442	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	443
	444	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
	445
11.1	446
8.1	447	= 5. DR-TS1 Water Turbidity Sensor =
	448
9.1	449	== 5.7 RS485 Commands ==
	450
10.1	451
	452	The address of the dissolved oxygen sensor is 15
	453
11.1	454	The query data command is 15 03 00 00 00 01 87 1E
10.1	455
11.1	456	For example, the returned data is 15 03 02 (% style="color:red" %)02 9A(%%) 09 4C
	457
	458	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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