TM 11-6780-225-35
CHAPTER 4
DIRECT AND GENERAL SUPPORT TESTING PROCEDURES
Equipment under test column, then perform each
4-1. Testing the Darkroom
specific test procedure and verify it against its
a. Testing Procedure. Testing procedures are
performance standard.
prepared for use by Army field maintenance shops and
b. Test Equipment. The test equipment required
Army service organizations responsible for direct and
for testing the darkroom are given below.
general support maintenance of signal equipment to
(1) Insulation Breakdown Test Set AN/ GSM-
determine the acceptability of repaired Signal equipment.
6.
These procedures set forth specific requirements that
(2) Multimeter TS-352/U.
repaired signal equipment must meet before it is
c. Pretest Requirement. Before proceeding to the
returned to the using organization. Refer to the wiring
tests below, perform the sequence numbers in the
diagram (fig. 5-1) and perform each test in sequence.
Operator's and Organizational PMCS charts outlined in
For each step, perform all the actions required in the
TM 11-6780-225-12.
4-2. Insulation Test
a. Test Equipment. Installation Breakdown Test Set AN/GSM-6.
b. Test Connections and Conditions. Refer to wiring diagram (figure 5-1).
WARNING
Make certain that all power has been removed before performing insulation test.
Control settings
Step
Test procedure
Performance standard
no.
Test equipment
Equipment under test
1
1250V
Set all circuit breakers to
Connect ground lead of insu-Insulation test lamp
ON
lation test set to ground
be on bright.
bus and connect other lead
to each circuit of control
panel in sequence.
2
1250V
Set all circuit breakers to
Same as step No. 1
Same as step No1.
OFF.
4-3. Continuity Test
a. Test Equipment. Multimeter TS-352/U.
b. Test Connections and Conditions. Refer to wiring diagram (fig. 5-1).
CAUTION
Remove all power from darkroom before performing test below.
NOTE
Remove all equipment that has not been fault-isolated from darkroom electrical outlets before per-
forming tests below.
4-1
