TM
5-811-1/AFJMAN
32-1080
11-10. Field Measurements.
control must be capable of being deactivated which
may require either manual/automatic or manual
Whenever performance of the security lighting is
on-off control depending upon the site.
to be measured after installation and compared to
(2) Manual. Wherever manual on-off control is
design criteria or predicted performance, design
appropriate, on-off controls will be accessible to
documents will need to identify test conditions,
instrumentation, and expected, or acceptable, per-
and operable only by authorized personnel. Sys-
formance under specific conditions and at specific
tems which are designed to remain "off' until
times. Illumination measurements should be per-
needed will have "on-off' control at the surveil-
formed after a 100-hour burn-in period. A set of
lance location and will meet instant-on require-
baseline measurements to determine background
ments.
illumination (contribution from moonlight, adja-
c. Grounding. All lighting circuits will include
cent facilities, etc.) should be taken first and
an equipment grounding conductor. The equip-
deducted to correct the field recordings. If design
ment grounding conductor may be any conductor
documents do not identify initial values, a multi-
approved by the National Electrical Code, and will
plier (maintenance factor or light loss factor)
be bonded to the noncurrent-carrying metal parts
should be stipulated to convert measured values to
of lighting standard and luminaires.
corresponding maintained illumination levels.
11-6
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