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Section 12
Calibration
PA2100 Calibration Procedure
Introduction
Calibration of the PA2100 voltage and current inputs is performed by applying a traceable reference
level to each voltage and current range. The actual PA2100 reading and reference are then
compared, the calibration constants are then calculated. This means that calibration of the PA2100
does not require adjustment of trim potentiometers or even the removal of the outer case.
Equipment Required
Voltage calibration source ±0.02% accuracy or better
Range 1Vrms to 500Vrms 50Hz or 60Hz.
Current calibration source ±0.02% accuracy or better
Range 0.12Arms to 20Arms 50Hz or 60Hz.
Alternatively a stable voltage and current source may be used in conjunction with a high accuracy AC
voltmeter and current shunt. The voltmeter and current shunt are used to measure the applied voltage
and current.
Calibration of the PA2100 voltage and current inputs is all that is necessary. All other PA2100
measurement parameters are calculated from the voltage and current inputs.
Before Calibrating a PA2100
1.
A warm-up period of 30 minutes is allowed before measurements are taken.
2.
Allow a 10 second settling time is allowed before recording a measurement.
3.
The calibration signal ground (low) is connected to the low terminal (Black) of the PA2100
4.
All instrument accuracy specifications are valid for a 1 year period.
5.
Room temperature = 23°C ± 2°C.
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