 ELECTROMAGNETIC COMPATIBILITY
TEST REPORT
ON
POWER SUPPLY
MODEL AB20 S/5
TEST REPORT NO. 894179M
JANUARY 4, 1990
|
| Test
performed by: |
EMACO, INC.
7562 Trade Street
San Diego, CA 92121 |
| Test
Started: |
29 December 1989 |
| Test
Started: |
4 January 1990 |
| EMC
Engineer: |
David A. Bernardin and
H.K. Mertel |
| EMC
Technician: |
David N. Gray |
| Approved
for EMACO: |
H.K. Mertel |
| Report
Release Date: |
4 January 1990 |
|
CERTIFICATION OF TEST DATA |
|
The electromagnetic
interference test and data evaluation findings of this report have been prepared by an
independent electromagnetic compatibility consultant, EMACO, INC., in accordance with the
applicable specifications and instructions required per the attached Administrative
Summary (Section 1 of this report).
The data, data
evaluation and equipment configuration presented herein are a true and accurate
representation of the measurements of the test sample's radio frequency interference
emission and susceptibility characteristics as of the dates and at the times of the test
under the conditions herein specified. |
|
|
Equipment
Tested: |
DC Power Supply Model AB20 S/5 |
|
Date of Test: |
December 29,
1989 through January 4, 1990 |
|
|
|
Herbert
K. Mertel, P.E.
Principal Consultant
EMACO, INC. |
|
| 1.0 |
INTRODUCTION |
|
| 1.1 |
ADMINISTRATIVE DATA |
|
Customer: |
MARTEK POWER ABBOTT
2727 S. La Cienega Boulevard
Los Angeles, CA 90034 |
|
Contact: |
Mr. Samuel
Mermel
(213) 202-8829 ext. 294 |
|
P.O. Number: |
74636 |
|
Date of Test: |
December 29,
1989 through January 4, 1990 |
|
Equipment Under Test (EUT): |
Power Supply
Model AB20 S/5 |
|
Input Voltage: |
28Vdc, 1.0 A |
|
Specification: |
MIL-STD-461C,
Part 2; MIL-STD-462
Class A1b Equipment |
|
Disposition of Specimen: |
The EUT is to
be picked up by MARTEK POWER ABBOTT personnel |
|
| 1.2 |
TEST SUMMARY |
|
The following is a summary of
the EMI tests that were performed:* |
|
|
DESCRIPTION |
STATUS |
|
a) Conducted
Emissions, CE01, 60 Hz to 15 kHz |
Passed |
|
b) Conducted
Emissions, CE03, 15 kHz to 50 MHz |
Passed* |
|
c) Conducted
Emissions, CE07, Time Domain Transients |
Passed |
|
d) Powerline
Conducted Susceptibility, CS01 30 Hz to 50 kHz |
Passed |
|
e) Powerline
Conducted Susceptibility, CS02 50 kHz to 400 MHz |
Passed |
|
f) Powerline
Conducted Susceptibility, CS06, Spikes |
Passed |
|
g) Radiated
Emissions, RE02, 14 kHz to 1 GHz, BB; 14 kHz to 10 GHz, NB |
Failed |
|
h) Radiated
Susceptibility, RS02, Magnetic Induction Fields |
Passed |
|
i) Radiated
Susceptibility, E-Field, RS03, 10 kHz to 10 GHz |
Failed** |
|
* |
During the initial CE03
test it was observed that the conducted EMI was high because the output leads radiated and
coupled to the input leads. To reduce the radiation and coupling from the load
wires, the metal load box was placed inside the shielded room and the output leads were
shortened to 8 inches. After the CE01 and CE03 tests, paint was sanded from the load
box and the box was bonded to the ground plane with conductive tape. |
|
** |
5 Vdc output ripple waveform did not change but the output DC voltage dropped
below 4.0 Vdc. |
|
| 1.3 |
PURPOSE OF EMI and EMS TESTS |
|
|
The purpose of the EMI and EMS
tests were to measure levels of conducted and radiated interference emitted from the EUT
and to determine the immunity of the EUT to external electromagnetic signals and
fields. The test results were compared with the specified limits.
The EMI and EMS
measurements on this EUT were relatively complex. These tests were performed under
the direct guidance of EMACO's Principal Engineers: Mr. David Bernardin and Mr. Herb
Mertel. |
|
| 1.4 |
DESCRIPTION OF EQUIPMENT UNDER TEST |
|
|
The
EUT was a DC to DC power supply with the following specifications: |
|
In: |
28Vdc |
|
Out: |
5Vdc/4 A |
|
Output Ripple: |
100 mVp-p at 25 MHz |
|
The power supply had only one
connector, a 9-pin, D-subminiature. Pin 6 was the +28 Vdc lead and Pin 1 was the 28
Vdc return. For testing, pins 4 and 5 were soldered together to one wire to form the
+5 Vdc output. Similarly, pins 8 and 9 were connected to one wire for the 5 Vdc
return.
The electrical output
load was a resistor bank mounted in a metallic box. The EUT and load box were
electrically bonded to the ground plane for all tests except the conducted emissions
tests. The output leads between the EUT and load box were 8 inches. |
|
| 1.5 |
ENVIRONMENTAL CONDITIONS |
|
|
The
environment for the EMI tests was as follows: |
|
|
a) Temperature: 25° ± 5° C
b) Relative Humidity:
Laboratory Ambient
c) Altitude:
Laboratory Ambient |
|
| 1.6 |
POWER REQUIREMENTS |
|
|
The
EUT was designed to operate with 28 volts DC, 20 W power. The power used during
testing was 28 Vdc and 1.0 A. |
|
| 1.7 |
INTERCONNECTIONS |
|
|
The
interconnections during the EMI tests were as shown in Figure 1, which also shows the
general test setup used during all tests. |
|
| 1.8 |
APPLICABLE DOCUMENTS |
|
|
The
following documents were applicable to the preparation and performance of the EMI tests
discussed: |
|
MIL-STD-461C
August 4, 1986 |
Electromagnetic Emission and Susceptibility Requirements for the Control of
Electromagnetic Interference, Class A1b Equipments (Part 2) |
|
MIL-STD-462
July 31, 1967 |
ElectromagneticInterference Characteristics, Measurement of |
|
DI-R-7063 |
DataItem
Description, EMI Test Plan |
|
DI-R-7062 |
DataItem
Description, EMI Test Report |
|
P.O.
#74636 |
PurchaseOrder,
MARTEK POWER ABBOTT to EMACO, INC. |
|
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