Wiki source code of Water Quality Sensors

Version 18.1 by Karry Zhuang on 2024/07/18 19:00

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
18.1	54	[[image:image-20240716104537-2.png\|\|height="475" width="706"]]
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
18.1	62	[[image:image-20240717103452-1.png\|\|height="320" width="610"]]
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.
	65
15.2	66
18.1	67	[[image:image-20240716105124-4.png\|\|height="326" width="569"]]
	68
	69	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.
	70
	71	B. Correct installation method
	72
	73	[[image:image-20240716105318-5.png\|\|height="330" width="594"]]
	74
	75
7.1	76	== 1.6 Maintain ==
	77
	78
15.2	79	* 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!
	80	* 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.
	81	* 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.
	82	* 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.
	83	* 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.
	84	* The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
	85	* 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.
	86	* 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.
	87	* (((
	88	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.
	89	)))
	90
8.1	91	== 1.7 RS485 Commands ==
	92
15.2	93
	94	RS485 signal (K1 default address 0x12; K10 default address 0x11):
	95	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	96
	97
16.1	98	=== 1.7.1 Query address ===
8.1	99
16.1	100	send
11.1	101
16.1	102	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	103	\|=(% 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
	104	\|(% 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
	105
	106	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.
	107
	108
	109	response
	110
	111	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	112	\|=(% 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
	113	\|(% style="width:99px" %)0X1\|(% style="width:112px" %)0X3\|(% style="width:106px" %)0X00\|(% style="width:93px" %)0X20\|(% style="width:104px" %)0XF0
	114
	115	=== 1.7.2 Change address ===
	116
	117	For example: Change the address of the sensor with address 1 to 2, master → slave
	118
	119	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	120	\|=(% 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
	121	\|(% 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
	122
	123	If the sensor receives correctly, the data is returned along the original path.
	124	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.
	125
	126
	127	=== 1.7.3 Modify intercept ===
	128
	129
	130	send
	131
	132	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	133	\|=(% 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
	134	\|(% 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" %)0XFA\|(% style="width:1px" %)(((
	135	0X97
	136	)))
	137
	138	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	139
	140	response
	141
	142	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	143	\|=(% 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
	144	\|(% style="width:99px" %)0X01\|(% style="width:112px" %)0X06\|(% style="width:135px" %)(((
	145	0X02
	146	)))\|(% style="width:126px" %)0X00\|(% style="width:85px" %)0X00\|(% style="width:1px" %)0X0A\|(% style="width:1px" %)0X0A\|(% style="width:1px" %)(((
	147	0XE5
	148	)))
	149
	150	=== 1.7.4 Query data ===
	151
16.3	152	The address of the EC K10 sensor is 11
16.1	153
10.1	154	The query data command is 11 03 00 00 00 02 C6 9B
	155
11.1	156	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	157
	158
	159	The address of the EC K1 sensor is 12
	160
	161	The query data command is 12 03 00 00 00 02 C6 A8
	162
16.1	163	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	164
11.1	165
16.2	166	=== 1.7.5 Calibration Method ===
12.1	167
	168
15.1	169	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	170
15.1	171	The calibration steps are as follows:
	172	(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.
	173
14.1	174	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	175	\|=(% 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
	176	\|(% 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" %)(((
	177	0X00
12.1	178
14.1	179	0X00
	180
	181	0X37
	182
	183	0X32
	184	)))\|(% style="width:1px" %)0XBD\|(% style="width:1px" %)0XFC
	185
15.1	186	1413*10 gives 0X00003732
14.1	187
16.1	188	response
15.1	189
13.1	190	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
14.1	191	\|=(% 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
	192	\|(% 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
	193
	194	(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
	195
	196	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
13.1	197	\|=(% 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	198	\|(% 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" %)(((
	199	0X00
12.1	200
14.1	201	0X01
	202
	203	0XF7
	204
	205	0X20
	206	)))\|(% style="width:1px" %)0X33\|(% style="width:1px" %)0X75
	207
15.1	208	12880*10 gives 0X01F720
	209
16.1	210	response
14.1	211
	212	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	213	\|=(% 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
	214	\|(% 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
	215
	216
8.1	217	= 2. DR-PH01 Water PH Sensor =
	218
9.1	219	== 2.7 RS485 Commands ==
8.1	220
9.1	221
11.1	222	The address of the pH sensor is 10
9.1	223
11.1	224	The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
10.1	225
11.1	226	For example, the returned data is 10 03 02 (% style="color:red" %)02 AE(%%) C4 9B.
	227
	228	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.
	229
	230
8.1	231	= 3. DR-ORP1 Water ORP Sensor =
	232
9.1	233	== 3.7 RS485 Commands ==
8.1	234
9.1	235
11.1	236	The address of the ORP sensor is 13
9.1	237
11.1	238	The query data command is 13 03 00 00 00 01 87 78
10.1	239
11.1	240	For example, the returned data is 13 03 02 (% style="color:red" %)02 AE(%%) 80 9B.
10.1	241
11.1	242	02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
	243
	244
8.1	245	= 4. DR-DO1 Dissolved Oxygen Sensor =
	246
9.1	247	== 4.7 RS485 Commands ==
8.1	248
11.1	249
10.1	250	The address of the dissolved oxygen sensor is 14
9.1	251
10.1	252	The query data command is 14 03 00 14 00 01 C6 CB
9.1	253
11.1	254	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	255
	256	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
	257
11.1	258
8.1	259	= 5. DR-TS1 Water Turbidity Sensor =
	260
9.1	261	== 5.7 RS485 Commands ==
	262
10.1	263
	264	The address of the dissolved oxygen sensor is 15
	265
11.1	266	The query data command is 15 03 00 00 00 01 87 1E
10.1	267
11.1	268	For example, the returned data is 15 03 02 (% style="color:red" %)02 9A(%%) 09 4C
	269
	270	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
	271
7.1	272

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