MIL-DTL-16938D
remove salt incrustation after the salt spray test, and to lubricate the shutter bearings prior to
beginning the shutter operation test.
The torque in inch-pound shall be recorded at the beginning and end of each half of the operating
test. Tests shall also be made to determine that messages transmitted with the searchlight at
speeds up to 300 operating cycles per minute can be read by an experienced signalman. For this
purpose, the variation in light output caused by the shutter shall be measured by means of an
oscillograph or other suitable measuring device. This determination shall be made both prior to,
and upon completion of the shutter operation test.
4.6.8 Illumination.
4.6.8.1 Method of measurement. The method of measurement shall be in accordance
with the current practices of the test facility at which the tests are being made.
4.6.8.2 Measurements required. Beam candlepower data shall be taken and recorded to
determine compliance with the requirements of 3.6 and 3.7.3 concerning beam speed and peak
beam candlepower reduction caused by the shutter.
4.6.8.2.1 Reduction in peak beam candlepower by shutter. In determining the reduction
in peak beam candlepower caused by the shutter, the cover glass shall be removed and the
shutter adjusted to produce minimum reduction in beam candlepower when completely open.
4.6.9 Operation. The searchlight shall be tested for compliance with 3.6.2 when
operated at rated current, voltage, and frequency in a cycle of 1/2 hour on, 1/2 hour off for
5 hours.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of materiel is to be performed by
DoD or in-house contractor personnel, these personnel need to contact the responsible packaging
activity to ascertain packaging requirements. Packaging requirements are maintained by the
Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM
products, or by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful,
but is not mandatory.)
6.1 Intended use. The searchlights covered by this specification are intended for use as
portable, lightweight, high-intensity signaling searchlights for shipboard use.
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