Calibration - Bourns 4030 User Manual

Bourns Model 4030 Surge Protector Test Set
®

Calibration

8
To verify 1 mA detector sensitivity:
Connect a 100 KΩ, ¼ W (or higher wattage), 1 % or less tolerance
resistor to the tester output. Press the appropriate TEST button and
observe the clamping voltage. The metered voltage should be 90-110 V.
To determine the acceptable limits when using a resistor with a value
that is not 100 KΩ, use this formula: E = 10
To verify meter accuracy:
Connect the output of the tester to a voltmeter standard (ideally with
a known accuracy of +0.25 % or better and a 1 MΩ or greater input
impedance). Press and hold the TEST button. When the readings on the
tester and the standard stabilize, compare the two values and note any
significant difference. The tester has no internal calibration adjustment.
If the tester is off by an amount greater than 1 % and it is not desirable to
employ a correction factor, return it to the factory for adjustment.
Note: Because of the "loading effect" of the standard's impedance, the
monitored voltage on both the standard and the tester may be lower
than the open circuit voltage of the tester alone. With battery power,
voltage on the voltmeter will begin to drop after reaching the peak.
x R ±10 %.
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