User Manual
AMETEK Programmable Power
BPS Series
55
4.9
Basic Initial Functional Test
CAUTION: Work carefully when performing these tests; hazardous voltages are present on
the input and output during this test.
Refer to Figure 4-11 for the required functional test set up. Proceed as follows to perform a basic function
check of the power system:
1.
Verify the correct AC line input rating on the nameplate of the BPS unit(s) and make sure the correct
three-phase line voltage is wired to the input of the BPS before applying input power.
2.
Connect a suitable resistive or other type load to the output of the BPS. The load resistance value will
depend on the voltage range you plan to check. Make sure the power resistor has sufficient power
dissipation capability - up to 30 KW for full load test on one phase of BPS90 models and that the load
used does not exceed the maximum power rating of the BPS. For three phase configurations, this test
can be performed on one phase at a time if needed.
3.
Connect an oscilloscope and DMM / voltmeter to the AC source output. Set both for AC mode.
4.
If the correct voltage is present, turn on the BPS unit(s) by closing the On/Off circuit breaker on the
front panel. For multi-cabinet systems, turn on the auxiliary unit first and wait for them to cycle on,
then turn on the master unit.
5.
If the BPS has more than one available output voltage range, go to the PROGRAM 1 screen and
select the desired voltage range. The output mode can be set from the PROGRAM 2 screen (use the
MORE soft key or press the PROGR function key again). Select AC mode.
6.
Set the output voltage to 0 volt and close the output relay with the OUTPUT ON/OFF button. There
should be little or no output although the DMM may show a noise level, especially if the DMM is in
auto ranging mode.
7.
Move the cursor to the VOLTAGE field in the PROGRAM 1 screen and either use the keyboard to
program a small voltage (20 VAC) or slew the voltage up slowly with the knob. Observe the DMM
reading. The reading should track the programmed voltage.
8.
Also monitor the scope. The output should be a sinusoidal voltage waveform.
9.
If the output tracks, increase the voltage till you reach 80 % of the voltage range or more. Check the
output voltage reading and waveform.
10.
Select the MEASUREMENT 1 screen by pressing the MEAS button. The output voltage, current and
power will be displayed. For three phase configurations, use the PHASE button to select the øABC
display mode. This will show the voltage, current and power for all three phases. If all phases are
loaded equally, the same current and power should be visible for all three unless the voltages are not
programmed to the same level. If only one phase is loaded, current and power will only be shown for
the loaded phase.
In the unlikely event the power source does not pass the functional test, refer to the calibration procedure
in Section 7 or call AMETEK Programmable Power customer service department for further assistance.
