AMETEK Compact i/iX Series Software Manual - Manual (Page 194)

User Manual – Rev H California Instruments
Avionics Software 194
8.3 –AMD Option Special Features
DC ripple tests for 28VDC EUT‟s are provided through a separate control screen. This is required to
extend the range of the ripple frequency to 5000 Hz. The actual requirement for AMD-24 rev C is
testing up to 150 KHz ripple. This is out of the available range of the power source. To test to the full
150 KHz range, an external audio generator and coupling transformer as outlined in RTCA/DO160,
Section 16.6.1.2 is required.
The AMD-24 ripple test screen is available from the main screen, Applications, Airbus, AMD24 DC
Ripple Test menu. Once selected, the DC ripple test control screen is modal and must be closed
before any other tests can be run. Opening this screen requires several seconds as the power source
is being set up to perform the DC ripple tests. This screen also places the power source in AC+DC
mode.
The available test settings are the section to be tested, which nominal voltage(s) to test at, and
phase/output selection. For single-phase systems, only phase A can be selected. The test pattern is
fixed per the selected section with a ripple frequency range from 16 Hz to 5000 Hz per Figure B-8.
The frequency slew rate is 30 minutes for each decade covered or one hour and 15 minutes for each
average DC level selected. If both levels are selected, the total test time will be 2 ½ hours.. Tests can
be aborted sooner if needed.
Figure 8-1: AMD-24 DC Ripple Test Window.
8.4 Test Tables
The tables shown on the next few pages list the test sections covered by the –AMD option. Where
relevant, the numbering used matches that of the AMD-24 document. The notes in the right hand
column indicate tests that are either not directly supported or require additional external test
equipment. Test tables are listed by rev and then by power group.