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Page Title:
Table I. ISD Selector Output Voltages |
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|  MIL-T-81290(WP)
3.3.8.2 Misfire Simulation. There shall be no continuity between pins
e and f of connector P3 with DUD switch in normally open position. There
shall be continuity between pins e and f when DUD switch is operated to closed
position.
3.3.9 Torpedo Simulation
3.3.9.1 28 Volt Supply Ground. With DC-TORP switch in TORP position,
there shall be continuity between pins h and T and h and X of connector P3.
3.3.9.2 ISD Selector. With the FUNCTION SELECTOR in START position
and with the DC-TORP switch in TORP position, apply 28 volts plus or minus 1
percent between pins m (+) and h (-) of connector P3 and apply 28 volts plus
or minus 1 percent between pins n (+) and h (-) of connector P3. The ISD in-
dicator lamps shall illuminate, indicating the relative position of the ISD (S2)
stepping switch. When the ISD switch is remotely rotated from 50 to 900, the
voltages between pins M (+) and h (-) of P3 increases 4 volts with each in-
crease in the ISD switch position up to a maximum of 24 volts as shown in
Table 1. The proper ISD indicator lamp shall illuminate for each position.
TABLE 1
ISD SELECTOR OUTPUT VOLTAGES
ISD Switch Position
Voltage Readings - M (+) to h (-)
50
4 volts DC
5%
150
8 volts
5%
250
12 volts DC
5%
450
16 volts DC
5%
650
20 volts DC
5%
900
24 volts DC
5%
3.3.9.3 FLOOR Selector. With the FUNCTION SELECTOR in START position
and with the DC-TORP switch in TORP position, apply 28 volts plus or minus 1
percent between pins m (+) and h (-) of connector P3 and apply 28 volts plus
or minus 1 percent between pins p (+) and h (-) of connector P3. The FLOOR
indicator lamps shall illuminate, indicating the relative position of the
FLOOR (S3) stepping switch. When the FLOOR switch is remotely rotated from
150 to 900, the voltages between pins N (+) and h (-) of connector P3 increases
5.6 volts with each increase in the FLOOR switch position up to a maximum of
28 volts as shown in Table 2. The proper FLOOR indicator lamp shall illum-
inate for each position.
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