Argantix KDC 100-100, User Manual

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User Manual
110 KDC Series II DC Power Supplies
11.2 MIL704 Option
11.2.1 General
The MIL704 option is capable of performing all DC power sections of the MIL-STD-704 test
standard in either revision D or E. Depending on the nominal EUT voltage, use of this option
may require a specific voltage range KDC model to support the highest possible output voltage to
be generated during certain test steps.
11.2.2 KDC Series -704 Option Restrictions:
The
–704 firmware option on the KDC series provides preprogrammed output sequences per
MIL-STD-704 revision D and E. At the time of publication, no requirements were specified for DC
voltage slew rates during voltage transient changes.
However, with the publication of revision F and the accompanying handbook in 2005, voltage
transition times less than 1 msec are now required when transitioning from one DC level to the
next for some of the tests. The handbook retroactively stipulates this to be done for older
revisions of the standard as well.
The KDC series is a switching DC power supply that offers high power density. Its output slew
rate is bandwidth limited and is also a function of the load connected. As such, it is generally not
able to meet the new < 1 msec output voltage change requirements for all DC voltage transients
in the MIL-STD 704 standard.
Argantix makes no claim that adding the
–704 option will make the KDC series fully compliant
with all requirements set forth in the MIL-STD 704 handbook.
The specific limitations and restrictions that apply are shown in the table below.
Rev Section Test Requirement Exception Comments
28VDC
E LDC103 Voltage distortion
spectrum
50kHz Required frequency range exceeds
KDC capability. Requires additional
equipment
D LDC103 Voltage distortion
spectrum
20kHz Required frequency range exceeds
KDC capability. Requires additional
equipment
D, E LDC104 Ripple Test
16.8kHz Required ripple frequency range
exceeds KDC capability.
–704
option applies 400 Hz ripple only.
Requires additional
equipment
D, E LDC105 Normal Operation,
Voltage Transients Output voltage change may be
longer than 1 msec. Requires KDC50 model to
support 50Vdc test level.
D, E LDC201 Power Interrupt,
Voltage change
< 250 usec Output voltage transient time
exceeds requirement. Hardware limit
D, E LDC302 Abnormal Operation,
Voltage Transients Output voltage change may be
longer than 1 msec. Requires KDC50 model to
support 50Vdc test level.
D, E LDC501 Starting Voltage
Transient Output voltage change may be
longer than 1 msec.