MIL-DTL-38449D
TABLE III. Functional test Continued.
Test
Control or Switch Positions
Observations 1/ 2/
8. SENSITIVITY
Set signal level control to 0V
(ADVANCED)
(a) Steady signal
Close S6 and slowly increase voltage
Unit shall fire thru (Lamps A,
G, & I ON) between 5.1 & 7.5V
(classes 1 and 2); 4.1 & 7.5V
(classes 3 and 4) Record value.
Adjust control for signal level of 4.5 +.1,
-0V (classes 1 and 2); 3.5 -.1, -0V (classes
3 and 4) Reset using S3
Lamps A, C, E, & H ON
(b) Pulse, 3 ms
Open S6 and set control for 7.5 +0, -.1V
Close S7 momentarily
Lamps A, D, H, I, & J ON
Close S7 Momentarily again
Lamps A, G, & I ON
(c) Pulse, 15 ms
Reset using S3
Lamps A, C, E, & H ON
Close S8 momentarily
Lamps A, D, H, I, & J ON
Close S8 momentarily again
Lamps A, G, & I ON
RESET
9. RESPONSE
Set S5 to DC position
TIME
Connect timer or counter with start
Timer shall indicate less than
input on TP 1 and stop input on TP 2.
50 ms response time between
With unit in RESET condition,
input (start) signal on TP 1
momentarily close S1.
and output at TP 2. (Pin J)
10. DELAY TIME
Connect timer or counter with start
Timer shall indicate a duration
input on TP 1 and stop input on TP 3.
of from 50 to 200 ms.
With unit in RESET condition
Lamps A, G, & I ON
momentarily close S4.
RESET
Lamps A, C, E, & H ON
Set power supply to 18 +.5, -0V S5 in DC
Results and limits are
position
identical to High Voltage test.
LOW VOLTAGE
S6 on OFF position
Repeat steps 1 through 10 of High
Voltage Test in this table.
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