FM Report for 20/20MI-3
TM 787100 Rev (Af), May 2019
61
Appendix C
FM Report for 20/20MI-3
Examination and Test
Four samples of Model 20/20MI-3 Flame Detector, representative of
production units, were examined and tested at FM Approvals in Norwood,
Massachusetts.
One sample was examined, tested, and
compared to the manufacturer’s
drawings.
All documentation applicable to this program is on file at FM Approvals.
Stability Test
One Model 20/20MI-3 flame detector was energized and tested to verify
proper operation under normal, standby conditions. Continued operation of
this sample was monitored for 30 days in clean-air (working office type):
there was no evidence of instability or false signals during that period.
Baseline Sensitivity Test
All 4 samples of the 20/20MI-3 Flame Detectors were subjected to a small-
scale sensitivity test consisting of a 1.75
”
/4.5cm diameter fire of n-Heptane
at a distance of 3ft/1m from the detector. The average results for all 4
samples were as follows:
Model 20/20MI-3 at 3 ft/1m: 1.5 seconds.
Flame Response Sensitivity Test
All 4 samples of the Model 20/20MI-3 were exposed to the standard test
consisting of a 12 x 12
”
/ 0.3 x 0.3m pan fire with fuels noted below. The
tests were conducted at FM Approvals in Norwood, MA, and the average
results for all 4 samples are as follows:
