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|  MIL-Q-48555A{AR)
3.9
The requirements of 3.10.1 through 3.11.4
Orientation.
shall be met with:
The flat mounting surface of the quadrant in a vertical
a.
plane.
b.
The locating keyways in a horizontal plane.
c. The elevation level vial bubble centered within the
thickness of a graduation line.
d. The four quadrant mounting bolts torqued to 25 to 30 foot
pounds.
e.
The correction counter indicating "00 MILS".
f.
The elevation counter indicating "0000 MIlS".
3.10
Performance.
3.10.1 Excursion
range.
Elevation counter.
3.10.1.1
The elevation counter shall cover
the excursion of at least 1433 roils in elevation and 280 roils in
depression when the correction counter indicates "00 MILS".
3.10.1.2 Correction counter. The correction counter limit
stops shall have a minimum of 95 roils excursion, but not over 99
roils excursion on the "+" and "-" dials.
3.11
Accuracy.
3.11.1 Elevation readings. The error at any elevation setting
shall not exceed 0.5 roil. The total of all readings shall not
exceed 1.0 roil. Nine readings shall be taken in 200 mil increments.
Backlash in elevating mechanism shall not
3.11.2 Backlash.
exceed 0.7 mil at any elevation setting between 280 roils in
depression and 1433 roils in elevation.
3.11.3 Correction counter setting - affect on elevation
counter . Setting +50 roils into the correCtion counter shall
decrease the elevation counter reading 50 + 0.5 roils. Setting
-50
roils into the correction counter shall increase the elevation
counter reading 50 + 0.5 roils.
5
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