Analogue Meters Testing

Testing Procedures

  • Calibrate the meter at different values.
Download: Meters Test Format

Equipment Required

  1. Injection Kit (Freja).
  2. ​Connection Cables (Banana Type). 
Picture
FREJA 300
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Connection Cables

Meter Calibration Test

  • Connection will be same as the shown figure.
  • Adjust meter pointer exactly at zero scale.
  • Sometimes we connect a series resistor to control injected current for small scale meters.
  • For Ammeters:
    1. Inject AC current with different values (25%, 50%, 75% & 100% of full scale).
    2. Calculate the meter error accuracy at each value.
  • For Voltmeters:
    1. Inject AC Voltage with different values (25%, 50%, 75% & 100%  of full scale).
    2. Calculate the meter error accuracy at each value.
Picture
Connection Circuit