Kikusui PWX750ML, User Manual

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PWX
Calibration
The PWX750ML is calibrated before shipment. To maintain long-term performance, we rec-
ommend periodic calibration.
For calibration, contact your Kikusui agent or distributor.
If you are going to calibrate the PWX750ML yourself, follow the procedures below. All of the
calibration items of the PWX750ML are described.
Calibration overview
The following eight calibration items are available.
Be sure to calibrate both the offset and full scale values.
• Output voltage offset (10 %) • Output voltage full scale (100 %)
• Voltmeter offset (0 %) • Voltmeter full scale (100 %)
• Output current offset (10 %) • Output current full scale (100 %)
• Ammeter offset (0 %) • Ammeter full scale (100 %)
Required devices
• DC voltmeter (DVM) with a measurement accuracy of 0.02 % or more
• Shunt resistor
Environment
Perform calibration in the following environment.
• Temperature: 23 °C ± 5 °C
• Humidity: 80 %rh or less
To minimize the calibration error due to initial drift, warm up the PWX750ML for at least 30
minutes before calibration. In addition, warm up the DVM and shunt resistor for as long as is
necessary.
Model
Recommended shunt resistor
Rating Tolerance
PWX750ML 30 A / 50 mV (1.67 m
Ω
) < ±0.1 %