METREL CS 2890, Инструкция по эксплуатации, Страница: 60 / 96

CS 2890 Power Simulator / Calibrator Operating the instrument
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6 Instrument usage
– Power Calibrator
In order to maintain high accuracy of your PQ Analyser, instrument should be
periodically checked. Each Metrel PQ instrument come with Calibration certificate (see
Annex I) ,
CS 2890 Power Calibrator has stable and precise voltage output, which can be used for
periodic calibration and adjustment of Metrel Power Quality Analysers.
CS 2890 is intended for calibrate Class A (MI 2892/MI 2893) as well as Class S (MI
2885/MI 2883) power quality analysers.
Calibration Power Quality Analysers, Metrel recommends to use:
- Using reference value from the CS 2890 calibration certificate. In this
case, adjustment to the refence from the calibration certificate is needed.
Example of CS 2890 calibration certificate is under
Annex II
– CS 2890
Calibration Certificate This procedure is valid for Class S PQ Analysers.
- Using substandard Volt-meter (proposed accuracy at least
±0.05%). In
this case, the CS 2890 voltage is adjusted referred to the reading from the
Volt-meter. This procedure is valid for Class A PQ Analysers (also for
Class S).
Calibration procedure is described under Item 6.2 .
Notes:
It is
important that PQ Analyser under calibration is powered with batteries (not
connected to external power supply) and all other cables (USB, GPS, etc) are
disconnected from the instrument (to exclude the influence of power network).
Assure that PQ instrument has fully charged batteries before starting the
calibration procedure.
Power Calibrator must be attached to the +12V power supply to generate accurate
and stable output.
Turn on the PQ Analyser and Power Calibrator and leave them working for at
least 30 minutes, in order to assure stabile temperature environment.