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-1000 Series
6 - 8
OM-001-01000-000-04.0
Low-Current (A-LO) Mode Calibration
1.
At the FREQUENCY Display, press the
﹀
button to select
Α−ΛΟ
(A LO).
2.
At the OUTPUT Terminals, carefully connect a resistive load and connect a
certified, calibrated RMS ammeter, of at least 0.2% accuracy.
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.
Calibration Settings
Parameter
1002
1003
1005 1010 1020 1030 1040
1060
V LO (VAC) 150.0
150.0 150.0 150.0 150.0 150.0 150.0
150.0
V HI (VAC)
300.0
300.0 300.0 300.0 300.0 300.0 300.0
300.0
A LO (A)
3.000
3.000 30.00 30.00 30.00 30.00 30.00
300.0
A HI (A)
16.00
25.00 42.00 80.00 160.0 250.0 330.0
500.0
P LO (kW) 0.3000 0.3000 3.000 3.000 3.000 3.000 3.000
30.0
P HI (kW)
2.000
3.000 5.000 9.000 18.00 27.00 36.00
54.0
5.
At the VOLTAGE Display, press the OUTPUT/RESET button. The APS unit will
automatically perform a low-current output reading and will output approximately
120 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.
