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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