Aumeascon AM-D-pH Water RS485 Digital Online pH Sensor

 AM-D-pH  Digital Online pH Sensor

 

Aumeascon AM-D-pH digital pH electrode independently developed and produced by Aumeascon. The housing of pH sensor is SS316 for harsh application, easy to install, and it has high measurement accuracy, sensitive response, and can work stably for a long time. Built-in temperature probe, instant temperature compensation. Strong anti-interference ability, the longest output cable can reach 500 meters. It can be set and calibrated remotely, and the operation is simple. It can be widely used in monitoring the pH of thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food, fermentation, brewing and tap water and other fields.

 

Technical Specification

Ø Standard RS485 Modbus.

Ø Maximum transmission distance 500 meters.

Ø Independent chip, anti-interference, strong stability.

Ø SS316 housing for harsh waste water.

 

Technical Parameters

Model	AM-D-pH
Measuring range	0~14pH  0~65℃
Accuracy	±0.1pH  ±0.5℃
Resolution	0.01pH  0.1℃
Power Supply	9~36V DC
Communication	RS485 Modbus RTU
Housing material	SS316 for fresh water ; Titanium for sea water
Connection	Upper G1”

 

RS485 Modbus RTU Protocol

Address	Meaning	Range	Default value	Rate	R/W	Code	Indicate
0	Temp	0-1270		0.1℃	R
1	pH	0-1400		0.01pH	R
2	Manual Temp	0-1270	250	0.1℃	R
3	Measuring potential	-4141~4141		0.1mV	R
5	Temp state	0-2			R		=0: normal; =1: too high or too low =2: no sensor connected
8	Address	1-254	2		R/W		Change the slave address
9	Baud rate	4800-19200	9600	BPS	R/W		Only allow: 4800,9600,19200
10	Parameter Recovery				W	1996	revert to default
11	Reset the Instrument	1524			W	1524	Restart the instrument
13	Instrument Calibration				W	1	Zero potential calibration: The electrode is placed in a buffer of pH 7.00 or 6.86.
						2	Slope calibration: electrode is placed in pH4.00 (10.00) or in buffer at pH 4.00 (9.18). Buffer type changed by register 20。
14	Zero point adjustment	-5916~5916	0	0.01mV	R/W		When register 13 is written with instruction 1, the value is automatically updated
15	Slope	0-100	100	1%	R		When register 13 is written with instruction 2, the value is automatically updated
20	Standard Solution	0,1	0		R/W		0:Standard Solution 4.00,7.00,10.00; 1:Standard Solution 4.00,6.86,9.18

 

Communication Format Details

Temperature data read command:

Address + function code + register start address + number of registers read + CRC check code (hexadecimal)

For example Tx:01 03 00 00 00 01 84 0A

Address	Code	Register start address	number of registers	CRC check code
01	03	0000	0001	840A

 

Temperature data return command:

Address + function code + data length + data + CRC check code (hexadecimal)

For example Rx:01 03 02 00 DF F9 DC

Address	Code	Data length	Temperature	CRC check code
01	03	02	00DF	F9DC

 

pH data return command:

Address + function code + data length + data + CRC check code (hexadecimal)

For example Rx: 01 03 02 02 AE 38 98

Address	Code	Register start address	number of registers	CRC check code
01	03	0001	0001	D5CA

 

pH data return command:

Address + function code + data length + data + CRC check code (hexadecimal)

For example Rx: 01 03 02 02 AE 38 98

Address	Code	Register start address	number of registers	CRC check code
01	03	02	02AE	3898

Convert the hexadecimal number 2AE to decimal by using the calculator (programmer mode) to get the value 686. The actual value of pH contains 2 decimal places, then the actual value is 686×0.01= 6.86

 

Wiring instructions

V+	V-	M-A	M-B
9~36V Positive	9~36V Negative	RS485-A	RS485-B

 

Contact info:

Shanghai Aumeascon Automation Technology Company 

Website:www.aumeascon.com 

Mob/WA:86-18721238342 

Email: Sales@aumeascon.com

Address:No. 95, Shihu New Road, Shihudang Town, Songjiang District, Shanghai.China , Zip code:201604