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243	243	* **Power Input**: DC7~~30
	244	+
244	244	* **Power Consumption** : < 0.5W
	246	+
245	245	* **Interface**: RS485. 9600 Baud Rate
	248	+
246	246	* **pH measurement range**: 0~~14.00pH; resolution: 0.01pH
247		-* **pH measurement error**:±0.15pH
248		-* **Repeatability error**:±0.02pH
249		-* **Temperature measurement range**:0~~60℃; resolution: 0.1℃ (set temperature for manual temperature compensation, default 25℃)
250		-* **Temperature measurement error**: ±0.5℃
	250	+
	251	+* **pH measurement error**: ±0.15pH
	252	+
	253	+* **Repeatability error**: ±0.02pH
	254	+
	255	+* **Temperature measurement range**:0~~60°C; resolution: 0.1°C (set temperature for manual temperature compensation, default 25°C)
	256	+
	257	+* **Temperature measurement error**: ±0.5°C
	258	+
251	251	* **Temperature Measure Range**: -20 ~~ 60 °C
	260	+
252	252	* **Temperature Accuracy: **±0.5 °C
	262	+
253	253	* **IP Rated**: IP68
	264	+
254	254	* **Max Pressure**: 0.6MPa
255	255
256	256	== 2.2 Wiring ==
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259	259	[[image:image-20240720172548-2.png||height="348" width="571"]]
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262		-== (% style="color:inherit; font-family:inherit" %)2.3 (% style="color:inherit; font-family:inherit; font-size:26px" %)Mechinical Drawing(%%) ==
	273	+== 2.3 Mechinical Drawing ==
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265	265	[[image:image-20240714174241-2.png]]
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299	299	* 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!
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300	300	* 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.
	313	+
301	301	* 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.
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302	302	* 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.
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303	303	* 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.
	319	+
304	304	* The electrode should be cleaned with deionized water before and after measurement to ensure accuracy.
	321	+
305	305	* 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.
	323	+
306	306	* 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.
307		-* (((
308		-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.
309		-)))
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	326	+* 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.
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	328	+
311	311	== 2.6 RS485 Commands ==
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379	379	If the sensor receives correctly, the following data will be returned, slave → host
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381	381	(% border="1" cellspacing="3" style="background-color:#f2f2f2;width:518px" %)
382		-|=(% style="width: 44px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 89px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 89px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 89px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 89px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 89px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 89px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
	400	+|=(% style="width: 44px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data high|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)Register 0 Data low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 79px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
383	383	|(% style="width:99px" %)0X10|(% style="width:72px" %)0X03|(% style="width:68px" %)0X02|(% style="width:70px" %)0X02|(% style="width:72px" %)0XAE|(% style="width:56px" %)0XC4|(% style="width:56px" %)0X9B
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385	385	The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.
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395	395	This device uses three-point calibration, and three known pH standard solutions need to be prepared.
396		-**The calibration steps are as follows:**
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	415	+(% style="color:blue" %)**The calibration steps are as follows:**
	416	+
397	397	(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.
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399	399	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:518px" %)