User Manual California Instruments
CSW Series 131
FREQUENCY TRANSIENTS (Group 1 only)
Seq. No Frequency Time
1 400 5 Minute
2 440 150msec
3 400 5Sec.
4 350 150msec
5 400 5Sec.
Table 8-5: Normal Frequency Transient Sequence
This test applies to Group 1 only. At 115 voltage, change the frequency per sequence listed in
Table 8-5. The test will cycle 5 times starting from sequence 2.
FREQUENCY VARIATION (Group 2 and 3 only)
Seq. No Initial Frequency Slew rate Final Frequency
Group2 Group3 Hz/Sec Group2 Group3
1 360 360 100 650 800
2 650 800 100 360 360
3 360 360 Pause 5 sec 360 360
Table 8-6: Normal Frequency Variation Sequence
This test will apply to Group 2 and 3 only. At 115 voltage, the frequency is set to 360Hz for 5
minutes. The frequency is slowed per sequence listed in Table 8-6. The test will cycle 3 times.
The frequency will return to nominal after the test is completed.
8.1.1.5.2 EMERGENCY TEST
From the DO160 MENU scroll to the EMERGENCY AC entry using the up and down cursor
keys. Press the ENTER key to select the EMERGENCY screens. The screen will appear as
shown in Figure 8-8.
Figure 8-8: Emergency Screen
The EMERGENCY SCREEN has the following tests:
1 VOLT FREQ MIN
2 VOLT FREQ MAX
3 VOLT UNBALANCE
The above tests can be selected by scrolling to the highlighted selection using the up and down
key and the ENTER key to start the selected test.
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