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|  MIL-T-81809(AS)
Specification
Acceptance
and Acceptance
Requirements
Characteristic
Requirement
(if lower)
Lens Focus
3.4.2
Target Position
3.4.3
Self-Test Circuit
3.4.4
20 + 10 cycles
Motor Speed
3.4.5
per-minute
Luminance Output
3,4.6
4.4.6.4 Failure Criteria - Unless otherwise defined in the contract or order,
an equipment is defined to have failed whenever the performance characteristics fall
below (or outside of) the required acceptance limits-of 4.4.6.3.
4.4.6.5 Preventive Maintenance - No preventive maintenance is permissible,
except the replacement of burned out bulbs, and the recharging of batteries. Opera-
tional stability applies as specified in 3.3.3.
4.4.7 Interference Control - (M103) The test sets shall be tested in accor-
dance with MIL-1-6181 within the limits of 3.3.4.1.
4.4.8 Warm-Up Time - (M104) No test set warm-up time is required.
4.4.9 Alignment - (M105) In the following tests, 115 + 1 volt,
10 Hz,
single phase power is specified for energizing the test set
the procedures of
4.4.9.1, 4.4.9.2, 4.4.9.3, and 4.4.9.6. There shall be no deviation in the required
test results specified in the procedures of 4,4.9.1, 4.4.9.2, and 4.4.9.6 when the
test set is operated from 115-volt, 400 Hz, single phase power, or from battery
power (six fully charged batteries). There shall be no deviation in the required
test results when the test set is operated from 115-volt, 400 Hz, single phase power.
The procedures for testing the alignment of the test set shall be as follows:
4.4.9.1 Lens Focus - With the telescope and reference target mounted on the
applicable fixture, the telescope eyepiece shall be adjusted until the crosshairs
are vividly clear. The telescope INFINITY knob shall be adjusted until the telescope
is focused on the reference target crosshairs. The telescope shall then be rotated
about its axis until the telescope and reference target crosshairs coincide. The
target appearance shall meet the requirements of 3.4.2.
4.4.9.2 Target Positioning - With 115
1 volt,
10 Hz, single phase
applied to the test set, the path of the center of the target, as observed in the
telescope, shall meet the tolerances indicated in figure 1.
4.4.9.3 Battery Charging Circuit - With the batteries removed from the test
set, the-battery charging circuit activated, and an 18 ohm 1 percent resistive
load between TP1 and TP2 on the platform assembly, the testset meter Ml shall indi-
cate 375 + 25 ma.
4.4.9.4 Self-Test Circuit - With the batteries removed from the test set, and
switch S4 placed in the LIGHT position, connect a variable d-c power supply between
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