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256	256
257	257	== 2.2 Wiring ==
258	258
259		-
260	260	[[image:image-20240720172548-2.png||height="348" width="571"]]
261	261
262	262
263	263	== (% style="color:inherit; font-family:inherit" %)2.3 (% style="color:inherit; font-family:inherit; font-size:26px" %)Mechinical Drawing(%%) ==
264	264
265		-
266	266	[[image:image-20240714174241-2.png]]
267	267
268	268
269	269	== 2.4 Installation Notice ==
270	270
271		-
272	272	Do not power on while connect the cables. Double check the wiring before power on.
273	273
274	274	Installation Photo as reference:
275	275
276		-(% style="color:blue" %)**Submerged installation:**
	273	+**~ Submerged installation:**
277	277
278	278	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.
279	279
280	280	[[image:image-20240718191348-6.png]]
281	281
282		-(% style="color:blue" %)**Pipeline installation:**
	279	+**~ Pipeline installation:**
283	283
284	284	Connect the equipment to the pipeline through the 3/4 thread.
285	285
286	286	[[image:image-20240718191336-5.png||height="239" width="326"]]
287	287
288		-(% style="color:blue" %)**Sampling:**
	285	+**Sampling:**
289	289
290	290	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.
291	291
292		-(% style="color:blue" %)**Measure the pH of the water sample:**
	289	+**Measure the pH of the water sample:**
293	293
294	294	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.
295	295
...	...	@@ -309,17 +309,13 @@
309	309	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.
310	310	)))
311	311
312		-
313	313	== 2.6 RS485 Commands ==
314	314
315		-
316	316	RS485 signaldefault address 0x10
317	317	Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
318	318
319		-
320	320	=== 2.6.1 Query address ===
321	321
322		-
323	323	send
324	324
325	325	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
...	...	@@ -332,7 +332,6 @@
332	332	|=(% 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
333	333	|(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
334	334
335		-
336	336	=== 2.6.2 Change address ===
337	337
338	338	For example: Change the address of the sensor with address 1 to 2, master → slave