18.104.22.168.4 Fabrication, setup and calibration. Design and
fabrication of test equipment shall be such that it incorporates
the features of rigidity, stability, and ease of maintenance.
Setup and calibration equipment necessary for certification of the
testing equipment accuracy shall be furnished and will become a
part of the testing equipment. Operating and calibration
instructions shall be prepared and submitted to the procuring
Test methods and procedures.
4.6.1 Telescope clampinq mechanism. Conduct this test with
the mount positioned on the testing equipment specified in
Position the target so that the intersecting point of
the vertical and horizontal target lines are coincident to the
geometric axis of the clamp for-the telescope. Install the
telescope in the clamping mechanism of the mount and lock the
clamp by applying a force of 15 to 17 inch-pounds to the locking
lever and 10 to 12 inch-pounds to the wingnut. By means of the
elevation and azimuth knobs, adjust the line of sight of the
telescope so that its vertical and horizontal reticle lines are
superimposed on the image at the vertical and horizontal target
The telescope clamping mechanism shall conform to the
requirements of 3.5 when the applicable torques are applied to the
telescope body and the clamp for the telescope. Any rotation of
the telescope within the clamp, or rotation of the clamping
mechanism about its own axis shall be determined by the permanent
displacement (lack of coincidence) of the telescope reticle lines
with respect to the target image lines.
5.1 Preparation of radioactive material. Handling,
packaging, packing, shipping, and marking shall be in accordance
with Packaging Data Sheet 9360168 and DSAM 4145.8. The level of
protection shall be as specified in the procurement document.
6.1 Intended use. The Sightunit, M64A1 is used for laying
the US Army mortar systems in deflection and elevation for direct
and indirect fire modes.
6.2 Ordering data.
Procurement documents should specify the
Title, number, and date of this specification.
Selection of applicable levels of preservation.