CHAPTER 6
INSTRUMENTATION CALIBRATION
Entire Contents Copyright 2004 by Adaptive Power Systems, Inc. (APSI) • All Rights Reserved • No reproduction without written authorization from APSI.
APS-3000P Series 6 - 8 OM-001-03000-00P-03.9
Low-Current (A-LO) Mode Calibration
1. At the FREQUENCY Display, press the ﹀ button to select
(A LO).
2. At the OUTPUT Terminals, carefully connect a resistive load and connect a
certified, calibrated True RMS ammeter, of at least 0.2% accuracy, to Phase R (US
= A). After you calibrate Phase R, you will repeat this step for Phases S and T.
3. The size of the resistive load should be calculated based on the low-current
parameter for your particular APS unit, as shown in the following Calibration
Settings Table. Use 120 VAC for the voltage.
4. An example calculation is shown on page 6-2 in the Section Calculation Setup,
subsection How to Calculate the Size of the Load.
5. At the MULTIMETER Display, press the TEST button. The APS unit will
automatically perform a low-current output reading and will output approximately
100 VAC.
6. The external RMS ammeter will display the actual current output. The CURRENT
Display shows the calibration value (see Calibration Table, above).
7. Adjust the load or the output voltage until the RMS ammeter displays the value
shown in the Calibration Table (above). Please note, the value for your unit will
depend on the model.
8. At the CURRENT Display, adjust the metered current using the ︿ or ﹀ buttons
until the metered values match.
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