Calibration of Digital pH Sensor

Calibration Steps of BH-485-pH Digital pH Sensor

Calibration condition of BH-485-pH Digital pH Electrode

1.Digital pH sensor is directly with Standard RS485 Modbus. 

2.Calibration buffer:pH value:4.01,7.00 and 10.01

3.Distilled water is to clean pH sensor in each step.

4. Calibration software is Modbus poll on computer. 

5. The Address is 2.

Calibration steps of BH-485-pH Digital pH probe

1.First point is to calibration pH 7, put digital pH sensor in buffer 7;then send value 1 in register 13.

2.After measured value stable, then change pH sensor to another buffer 4.01 or 10.01.(clean pH sensor by distilled water when change buffer)

3.Then send value 2 in register 13 to start Second point calibration.

4.The pH sensor is pass test when slope over 95.(the slope value is in register 15)

Calibration finished of Digital pH Sensor

Attention:

1)Register 6 is to choose pH or ORP(0 is for pH,1 is for ORP),the default is 0 for pH when delivery.

Register 4 is to choose right temperature compensation,the default is 30K(“0” is for 30K, “1” is for 10K,“2” is for PT1000,“3” is for 2.252K