9.2 Input Calibration

Calibration can only be carried out in Configuration Level.

 

If the calibration is not within the specified accuracy follow the procedures in this section:-

 

In 800 range instruments, inputs which can be calibrated are:-

 

• mV Input. This is a linear 0 - 80mV range calibrated at two fixed points. This should always be done before calibrating either thermocouple or resistance thermometer inputs. mA range calibration is included in the mV range.

• Thermocouple calibration involves calibrating the temperature offset of the CJC sensor only. Other aspects of thermocouple calibration are also included in mV calibration.

• Resistance Thermometer. This is also carried out at two fixed points - 150Ω and 400Ω.

 

Before any calibration is attempted, observe the precautions listed in section 9.1.1.