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 TM 55-1905-219-14-2
2-113. ALARM SYSTEM TEST.
a.
The alarm system should be tested as follows:
initial turn-on
after service
as required
b.
There are three types of tests:
ground test
alarm test
trouble test
c.
The alarm system must be turned on and the PILOT LIGHT is lit. (Refer to paragraph 2-111). To test the
alarm system proceed as follows:
(1)
Ground test.
(a) Positive Ground-
1
The GROUND POS. LINE lamp (1) is brightly lit. A ground is present in one or more of
the
positive wires to a sensing device.
2
One at a time-Place switch (2) in the OFF position. If the light goes
out, the positive ground is in the indicated circuit.
3
Place each switch (2) in the NORMAL position. If either ground
light (1 or 3) is lit, there is a ground in that circuit also.
2-486
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