Aumeascon AM-D-GEC Digital Graphite Conductivity Electrode

AM-D-GEC  Digital Graphite Conductivity Electrode

AM-D-GEC digital graphite conductivity electrode independently developed and produced by Aumeascon. The housing of conductivity sensor is SS316 and measurement electrode is graphite 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 conductivity  of thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food, fermentation, brewing and tap water and other waste water application.

Technical Specification

Ø Standard RS485 Modbus.

Ø Maximum transmission distance 500 meters.

Ø Independent chip, anti-interference, strong stability.

Ø SS316 housing and graphite electrode for harsh waste water.

Technical Parameters

Model	AM-D-GEC
Parameters	Conductivity,TDS,Salinity,Resistivity
Measuring range	5000us/cm
Constant	K=1.0
Accuracy	1%FS  ±0.5℃
Resolution	1us/cm  0.1℃
Power Supply	9~36V DC
Communication	RS485 Modbus RTU
Housing material	SS316L
Connection	Upper G1”

 

Sensor Drawing

 

RS485 Modbus RTU Protocol

Addr.	Meaning	Range	Default	Magnification	R/W	Cmd	Remarks
0	Temp	0-1270		0.1℃	R
1	EC	0-20000			R		Determine the magnification according to register 20 X:10X-2μS/cm
2	Salinity	0-80			R		Practical salinity（ppt ‰）
3	Resistivity	5-10000			R		Determine the magnification according to register 20 X:10-2-X MΩ·cm
4	TDS	0-2000		1mg/L	R		TDS (mg/L,ppm)
5	Temp state	0-2			R		=0: normal; =1: too high or too low; =2: no sensor connected
8	Device addr.	1-254	4		R/W		Change the slave address
9	Baud rate	4800-19200	9600		R/W		Only allowed:4800,9600,19200
10	Recovery				W	1996	revert to default
11	Device Rst	1524			W	1524	Restart the instrument
13	Instrument calibration		0		W	2	Calibration: The electrode is placed in the standard solution (default 1413us/cm, determined by register 14), Calibration after stabilization
14	Buffer	0-2	1		R/W		0:84us/cm 1: 1413us/cm 2: 12.88ms/cm
15	Constant	1-60000	1000	0.001	R/W		Write instruction 2 in register 13 , the value is automatically updated
16	Temperature Compensation factor	0-100	20	0.001℃	R/W		Linear temperature compensation coefficient
17	TDS factor	400-1000	500	0.001	R/W
18	reference temperature		25		R/W		20/25
20	Measured value factor X	-1 ~ 5			R/W		It can be modified automatically according to the electrode constant, and can also be modified manually
21	Temperature adjustment		0		R/W
22	Measured value adjustment		0		R/W
24	MTCT Manual temperature	0-1270	250	0.1℃	R/W
25	Data Format	0-3	1		R/W		0:8N2 1:8N1 2:8E1 3:8O1
41	Conductivity				R		mS/cm,Float ABCD
43	Resistivity				R		Ω•cm，Float ABCD
45	Conductivity (without compensation)				R		mS/cm,Float ABCD
47	TDS				R		ppm,mg/L,Float ABCD
49	Salinity			0.01ppt	R		U16

 

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

Addr.	Func.	Register start Addr.	Number of registers read	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

Addr.	Func.	Data length	Temp value	CRC check code
01	03	02	00DF	F9DC

Convert the hexadecimal number DF to decimal using the calculator (programmer mode) to get the value 223.

The actual value of temperature contains 1 decimal place, then the actual value is 223×0.1= 22.3

 

Conductivity data read command:

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

For example Tx:03 03 00 01 00 01 D4 28

Addr.	Func.	Register start Addr.	Number of registers read	CRC check code
03	03	0001	0001	D428

 

 

Conductivity data return command:

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

For example Rx:03 03 02 00 DF 80 1C

Addr.	Func.	Data length	Temp value	CRC check code
03	03	02	00DF	801C

Convert the hexadecimal number DF to decimal using the calculator (programmer mode) to get the value 223. The actual value contains 2 decimal places, then the actual value is 223×0.01= 2.23

 

Salinity data read command:

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

 

For example Tx:03 03 00 02 00 01 24 28

Addr.	Func.	Register start Addr.	Number of registers read	CRC check code
03	03	0002	0001	2428

 

Salinity data return command:

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

For example Rx:03 03 02 00 DF 80 1C

Addr.	Func.	Data length	Temp value	CRC check code
03	03	02	00DF	801C

Convert the hexadecimal number DF to decimal using the calculator (programmer mode) to get the value 223. The actual value contains 2 decimal places, then the actual value is 223×0.01= 2.23

TDS data read command:

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

For example Tx:03 03 00 04 00 01 C4 29

Addr.	Func.	Register start Addr.	Number of registers read	CRC check code
03	03	0004	0001	C429

 

TDS data return command:

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

For example Rx:03 03 02 00 DF 80 1C

Addr.	Func.	Data length	Temp value	CRC check code
03	03	02	00DF	801C

Convert the hexadecimal number DF to decimal using the calculator (programmer mode) to get the value 223.

If the actual value does not contain decimals, the actual value is 223

 

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