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|  MIL-R-19046D(OS)
4.5.3.4 Continuity meter.
4.5.4
Test procedure
4.5.4.1 All pin designations specified herein are on connector P721,
as shown on Drawing 2445177.
4.5.4.2 Make continuity checks as given in Table 1,
Continuity shall
be as indicated there in.
TABLE I
From Pin
Continuity
To Pin
D
Closed circuit
P
D
N
Open circuit
L
Open circuit
c
F
H
Relay coil resistance
c
K
Open circuit
K
Open circuit
L
N
P
Open circuit
E
I
Closed circuit
4.5.4.3 Apply 110 VOltS ac (see 4.5.3.2) across pins A and B and re-
peat the measurements in Table I. The readings shall be unchanged ex-
cept for pin C to pin K, which shall be a closed circuit, and pin E to
pin I, which shall be an open circuit.
4.5.4.4 Disconnect the ac power supply from pins A and13, connect 21
volts dc (4.5.3.1) across pins F and H, and make the continuity measure-
ments given in Table II. Continuity shall be as indicated therein.
TABIE II
From Pin
Continuity
To Pin
D
P
Closed circuit
D
Closed circuit
L
Open circuit
C
C
K
Open circuit
K
L
Closed circuit
N
P
Closed circuit
E
I
Closed circuit
4.5.4.5 Using a 500 volt xnegohmmeter (4.5.3.3), measure from each pin
of PT21 to a point on the firing relay panel frame.
The firing relay panel
shall meet the requirements specified in 3.3.6.
4.5,4.6 Visual and dimensional examination. Each firing relay panel
shall be examined to determine conformance with the requirements of work-
manship and dimensions.
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