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...	...	@@ -37,45 +37,48 @@
37	37	== 1.5 Installation ==
38	38
39	39
40		- Do not power on while connect the cables. Double check the wiring before power on.
	40	+**Electrode installation form**
41	41
42		-Installation Photo as reference:
	42	+A:Side wall installation
43	43
44		-**~ Submerged installation:**
	44	+B:Top flange installation
45	45
46		-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.
	46	+C:Pipeline bend installation
47	47
48		-[[image:image-20240715181933-4.png||height="281" width="258"]]
	48	+D:Pipeline bend installation
49	49
50		-**~ Pipeline installation:**
	50	+E:Flow-through installation
51	51
52		-Connect the equipment to the pipeline through the 3/4 thread.
	52	+F:Submerged installation
53	53
54		-[[image:image-20240715182122-6.png||height="291" width="408"]]
	54	+[[image:image-20240718190121-1.png||height="350" width="520"]]
55	55
56		-**Sampling:**
	56	+**Several common installation methods of electrodes**
57	57
58		-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.
	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.
59	59
60		-**Measure the pH of the water sample:**
	60	+A. Several common incorrect installation methods
61	61
62		-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.
	62	+[[image:image-20240718190204-2.png||height="262" width="487"]]
63	63
	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.
64	64
	66	+[[image:image-20240718190221-3.png||height="292" width="500"]]
	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	+
	72	+[[image:image-20240718190249-4.png||height="287" width="515"]]
	73	+
	74	+
65	65	== 1.6 Maintain ==
66	66
67	67
68		-* 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!
69		-* 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.
70		-* 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.
71		-* 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.
72		-* 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.
73		-* The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
74		-* 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.
75		-* 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.
76		-* (((
77		-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.
78		-)))
	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.).
79	79
80	80	== 1.7 RS485 Commands ==
81	81
...	...	@@ -99,9 +99,8 @@
99	99
100	100	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
101	101	|=(% 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
102		-|(% style="width:99px" %)0X1|(% style="width:112px" %)0X3|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
	105	+|(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
103	103
104		-
105	105	=== 1.7.2 Change address ===
106	106
107	107	For example: Change the address of the sensor with address 1 to 2, master → slave
...	...	@@ -121,8 +121,8 @@
121	121
122	122	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
123	123	|=(% 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
124		-|(% 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" %)(((
125		-0X97
	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
126	126	)))
127	127
128	128	Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
...	...	@@ -133,14 +133,13 @@
133	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	134	|(% style="width:99px" %)0X01|(% style="width:112px" %)0X06|(% style="width:135px" %)(((
135	135	0X02
136		-)))|(% style="width:126px" %)0X00|(% style="width:85px" %)0X00|(% style="width:1px" %)0X0A|(% style="width:1px" %)0X0A|(% style="width:1px" %)(((
137		-0XE5
	138	+)))|(% style="width:126px" %)0X00|(% style="width:85px" %)0X00|(% style="width:1px" %)0X0A|(% style="width:1px" %)0X38|(% style="width:1px" %)(((
	139	+0X8F
138	138	)))
139	139
140		-
141	141	=== 1.7.4 Query data ===
142	142
143		-The address of the EC K10 sensor is
	144	+The address of the EC K10 sensor is 11
144	144
145	145	The query data command is 11 03 00 00 00 02 C6 9B
146	146
...	...	@@ -154,7 +154,7 @@
154	154	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
155	155
156	156
157		-=== 7.1.5 Calibration Method ===
	158	+=== 1.7.5 Calibration Method ===
158	158
159	159
160	160	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.
...	...	@@ -204,16 +204,131 @@
204	204	|=(% 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
205	205	|(% 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
206	206
	208	+= 2. DR-PH01 Water PH Sensor =
207	207
208	208
	211	+== 2.1 Specification ==
209	209
	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
210	210
	226	+== 2.2 Wiring ==
211	211
212		-= 2. DR-PH01 Water PH Sensor =
213	213
214		-== 2.7 RS485 Commands ==
	229	+== (% style="color:inherit; font-family:inherit" %)2.3 (% style="color:inherit; font-family:inherit; font-size:26px" %)Mechinical Drawing(%%) ==
215	215
	231	+[[image:image-20240714174241-2.png]]
216	216
	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	+
	278	+RS485 signaldefault address 0x10
	279	+Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	280	+
	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	+
217	217	The address of the pH  sensor is 10
218	218
219	219	The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
...	...	@@ -223,11 +223,155 @@
223	223	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.
224	224
225	225
	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	+
226	226	= 3. DR-ORP1 Water ORP Sensor =
227	227
228		-== 3.7 RS485 Commands ==
229	229
	383	+== 3.1 Specification ==
230	230
	385	+* **Power Input**: DC7~~30
	386	+* **Measuring range**:** **-1999~~1999mV
	387	+**Resolution**: 1mV
	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	+
	421	+=== 6.3.5 Maintenance ===
	422	+
	423	+
	424	+(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.
	425	+(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.).
	426	+(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.
	427	+(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.
	428	+(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.
	429	+(6) The electrode should be cleaned with deionized water before and after the measurement to ensure the measurement accuracy.
	430	+(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.
	431	+(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.
	432	+(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.
	433	+
	434	+== 3.6 RS485 Commands ==
	435	+
	436	+
	437	+RS485 signaldefault address 0x13
	438	+Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
	439	+
	440	+=== 3.6.1 Query data ===
	441	+
	442	+send
	443	+
	444	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	445	+|=(% 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
	446	+|(% 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
	447	+
	448	+response
	449	+
	450	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
	451	+|=(% 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
	452	+|(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
	453	+
	454	+
	455	+=== 3.6.2 Change address ===
	456	+
	457	+For example: Change the address of the sensor with address 1 to 2, master → slave
	458	+
	459	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	460	+|=(% 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
	461	+|(% 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
	462	+
	463	+If the sensor receives correctly, the data is returned along the original path.
	464	+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.
	465	+
	466	+
	467	+=== 3.6.3 Modify intercept ===
	468	+
	469	+send
	470	+
	471	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	472	+|=(% 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
	473	+|(% 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" %)(((
	474	+0X96
	475	+)))
	476	+
	477	+Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
	478	+
	479	+response
	480	+
	481	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
	482	+|=(% 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
	483	+|(% style="width:99px" %)0X13|(% style="width:112px" %)0X06|(% style="width:135px" %)(((
	484	+0X00
	485	+)))|(% style="width:126px" %)0X10|(% style="width:85px" %)0X00|(% style="width:1px" %)0X64|(% style="width:1px" %)0X8A|(% style="width:1px" %)(((
	486	+0X96
	487	+)))
	488	+
	489	+=== 3.6.4 Query data ===
	490	+
231	231	The address of the ORP sensor is 13
232	232
233	233	The query data command is 13 03 00 00 00 01 87 78
...	...	@@ -237,11 +237,69 @@
237	237	02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
238	238
239	239
	500	+=== 3.6.5 Calibration Method ===
	501	+
	502	+This device uses two-point calibration, and two known ORP standard solutions need to be prepared. The calibration steps are as follows:
	503	+(1) Place the electrode in distilled water to clean it, and then place it in 86mV standard buffer solution. After the data stabilizes,
	504	+enter the following calibration command, and the 86mV point calibration is completed;
	505	+
	506	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	507	+|=(% 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
	508	+|(% style="width:64px" %)0X13|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
	509	+0X00
	510	+)))|(% style="width:68px" %)0X24|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0XCB|(% style="width:55px" %)(((
	511	+0X03
	512	+)))
	513	+
	514	+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.
	515	+
	516	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
	517	+|=(% 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
	518	+|(% style="width:64px" %)0X13|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
	519	+0X00
	520	+)))|(% style="width:68px" %)0X25|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0X9A|(% style="width:55px" %)(((
	521	+0XC3
	522	+)))
	523	+
	524	+
240	240	= 4. DR-DO1 Dissolved Oxygen Sensor =
241	241
242		-== 4.7 RS485 Commands ==
243	243
244	244
	529	+== 4.1 Specification ==
	530	+
	531	+* **Measuring range**: 0.1～1000.0NTU
	532	+* **Accuracy**: ±5%
	533	+* **Resolution**: 0.1NTU
	534	+* **Stability**: ≤3mV/24 hours
	535	+* **Output signal**: A: 4～20 mA (current loop)B: RS485 (standard Modbus-RTU protocol, device default address: 01)
	536	+* **Power supply voltage**: 5～24V DC (when output signal is RS485)12～24V DC (when output signal is 4～20mA)
	537	+* **Working environment**: temperature 0～60℃; humidity ≤95%RH
	538	+* **Power consumption**: ≤0.5W
	539	+
	540	+
	541	+== 4.2 Impedance requirements for current signals ==
	542	+
	543	+[[image:image-20240718195414-8.png||height="100" width="575"]]
	544	+
	545	+
	546	+== 4.3 wiring ==
	547	+
	548	+== 4.4 Mechinical Drawing ==
	549	+
	550	+[[image:image-20240718195058-7.png||height="305" width="593"]]
	551	+
	552	+
	553	+=== 4.5 Instructions for use and maintenance ===
	554	+
	555	+* It can be directly put into water without adding a protective tube, ensuring the long-term stability, reliability and accuracy of the sensor.
	556	+* If the water conditions are complex and you want accurate data, you need to wipe the sensor probe frequently.
	557	+
	558	+
	559	+== 4.6 RS485 Commands ==
	560	+
	561	+4.6.1
	562	+
245	245	The address of the dissolved oxygen sensor is 14
246	246
247	247	The query data command is 14 03 00 14 00 01 C6 CB
...	...	@@ -263,5 +263,3 @@
263	263	For example, the returned data is 15 03 02 (% style="color:red" %)**02 9A**(%%) 09 4C
264	264
265	265	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
266		-
267		-

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