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257	257	== 2.2 Wiring ==
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259	259	[[image:image-20240720172548-2.png||height="348" width="571"]]
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261	261
262	262	== (% style="color:inherit; font-family:inherit" %)2.3 (% style="color:inherit; font-family:inherit; font-size:26px" %)Mechinical Drawing(%%) ==
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264	264	[[image:image-20240714174241-2.png]]
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266	266
267	267	== 2.4 Installation Notice ==
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269	269	Do not power on while connect the cables. Double check the wiring before power on.
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271	271	Installation Photo as reference:
272	272
273		-**~ Submerged installation:**
	276	+(% style="color:blue" %)**Submerged installation:**
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275	275	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.
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277	277	[[image:image-20240718191348-6.png]]
278	278
279		-**~ Pipeline installation:**
	282	+(% style="color:blue" %)**Pipeline installation:**
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281	281	Connect the equipment to the pipeline through the 3/4 thread.
282	282
283	283	[[image:image-20240718191336-5.png||height="239" width="326"]]
284	284
285		-**Sampling:**
	288	+(% style="color:blue" %)**Sampling:**
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287	287	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.
288	288
289		-**Measure the pH of the water sample:**
	292	+(% style="color:blue" %)**Measure the pH of the water sample:**
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291	291	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.
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306	306	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.
307	307	)))
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	312	+
309	309	== 2.6 RS485 Commands ==
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311	311	RS485 signaldefault address 0x10
312	312	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
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	319	+
314	314	=== 2.6.1 Query address ===
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316	316	send
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318	318	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
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325	325	|=(% 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
326	326	|(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
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	335	+
328	328	=== 2.6.2 Change address ===
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330	330	For example: Change the address of the sensor with address 1 to 2, master → slave