Crest Electronics CDVS-7000 Uživatelský manuál stáhnout pdf (Strana 262)

User Manual

248 i Series / iX Series

The key (backspace) will terminate the test at any time.

DC RIPPLE

This test will impose a 400Hz frequency component to the output voltage. The test will last for 2

minutes. The level of the ripple is as follows:

1. 28V system:

1.5V.

2. 270V system:

6.0V.

The key (backspace) will terminate the test at any time.

9.8.1.8.2 Transient Test

From the MIL704 DC MENU scroll to the TRANSIENT DC entry using the up and down cursor

keys. Press the ENTER key to select the TRANSIENT screen. The screen will appear as shown

in Figure 9-60.

Figure 9-60: Transient Menu

The Transient Test has the following tests:

HIGH VOLTAGE

LOW VOLTAGE

HIGH VOLTAGE

This test will change the output voltage for the selected phase in the following sequence:

1. 28V System

50V for 12.5 msec.

Linearly reduce to29V in 70msec.

Stay at 29V for 92.5msec before returning to 28V.

2. 270V System

330V for 20 msec.

Linearly reduce to280V in 20msec.

Stay at 280V for 135msec before returning to 270V.

Prior to the test, a range change may take place if the power source is set for 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.

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Crest Electronics CDVS-7000 Uživatelský manuál Strana 262