User Manual California Instruments
166 CSW Series
8.4.1.7.4 ABNORMAL TEST
From the MIL704 main menu (Figure 8-33) scroll to the ABNORMAL AC entry using the up and
down cursor keys. Press the ENTER key to select the ABNORMAL screens. The screen will
appear as shown in Figure 8-37.
Figure 8-37: Abnormal Screen
The ABNORMAL SCREEN has the following tests:
1 OVER VOLTAGE
2 UNDER VOLTAGE
3 OVER FREQUENCY
4 UNDER FREQUENCY
The above test can be selected by scrolling to the highlighted selection using the up and down
key and the ENTER key to start the selected test.
OVER VOLTAGE
This test will change the output voltage for the selected phase in the following sequence:
180V for 50msec.
The voltage gradually decays with time to 125 volt by the following equation:
V = 124.6 + 2.77/t. for 0.05 t 6.925
Stay at 125V for 93 seconds before returning to 115V.
Prior to the test, a range change may take place if the power source is set at the low voltage
range.
The key (backspace) will terminate the test at any time.
Note: A range change will result in momentary loss of power to the EUT. If this is not
acceptable, the power source must be left in high range at all times.
UNDER VOLTAGE
This test will change the output voltage for the selected phase in the following sequence:
0V for 7 seconds.
100V for 93 seconds.
The key (backspace) will terminate the test at any time.
OVER FREQUENCY
This test will change the output frequency in the following sequence:
480Hz for 5 seconds.
420Hz for 9 seconds.
The key (backspace) will terminate the test at any time.
UNDER FREQUENCY
This test will change the output frequency in the following sequence:
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