User Manual - Rev AV AMETEK Programmable PowerMX Series 2379.6.1.7.4 ABNORMAL TESTFrom the MIL704 main menu (Figure 9-33) scroll to the ABNORMAL AC entry using the up anddown cursor keys. Press the ENTER key to select the ABNORMAL screens. The screen willappear as shown in Figure 9-37.Figure 9-37: Abnormal ScreenThe ABNORMAL SCREEN has the following tests:1 OVER VOLTAGE2 UNDER VOLTAGE3 OVER FREQUENCY4 UNDER FREQUENCYThe above test can be selected by scrolling to the highlighted selection using the up and downkey and the ENTER key to start the selected test.OVER VOLTAGEThis 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 voltagerange.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 notacceptable, the power source must be left in high range at all times.UNDER VOLTAGEThis 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 FREQUENCYThis 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.
