Spectrex 20/20MI - Mini Triple IR (IR3) Flame Detector - Manual (Page 58)

Spectrex Inc. - SharpEye TM Mini IR3 Flame Detector Manual – TM 787100, Rev. D April 2011
50
Flame Response Sensitivity Test
All four samples of the Model 20/20MI-3 were exposed to the standard test
consisting of a 12 in. x 12 in. (0.3m 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 four samples are as follows:
Distance to
Fire
Detector
Model
Fuel
Ft. m
Sensitivity
setting
Response
(seconds -
average
20/20 MI-3 n-heptance 33 10 10 3.0
20/20 MI-3 n-heptance 24.7 7.5 7.5 4.2
20/20 MI-3 n-heptance 16.5 5 5 4.1
20/20 MI-3 n-heptance 8.2 2.5 2.5 8.2
20/20 MI-3 Diesel 23.1 7 10 3.8
20/20 MI-3 Diesel 17.3 5.3 7.5 5.5
20/20 MI-3 Diesel 11.5 3.5 5 6.4
20/20 MI-3 Diesel 5.7 1.7 2.5 9.2
20/20 MI-3 Ethyl Alcohol 24.8 7.5 10 4.6
20/20 MI-3 Ethyl Alcohol 18.5 5.6 7.5 3.2
20/20 MI-3 Ethyl Alcohol 12.4 3.8 5 4.8
20/20 MI-3 Ethyl Alcohol 6.1 1.8 2.5 3.6
20/20 MI-3 Jet A 23.1 7 10 1.9
20/20 MI-3 Jet A 17.3 5.3 7.5 4.3
20/20 MI-3 Jet A 11.5 3.5 5 6.1
20/20 MI-3 8 in.(20cm) dia. Pan
polypropylene pellets. 8 2.4 10 1.9
Field of View Test
One sample of the Model 20/20 MI-1, which has an identical enclosure to the
20/20 MI-3 and is considered representative of the series, was exposed to the 12
in. x 12 in. (0.3 m. x 0.3 m.) N-heptane pan fire during which time the viewing
angle was varied +/-50º from the centerline along the horizontal and vertical axes.
The following results were obtained:
Angle (Approximate)
Distance Average Response Time
On centerline 33 ft. (10m.) 3 sec.
+ 50º horizontal 16.5 ft. ( 3 m.) 8.7 sec.
- 50º horizontal 16.5 ft. ( 3 m.) 8.1 sec.
+ 50º vertical 16.5 ft. ( 3 m.) 8.8 sec.
- 50º vertical 16.5 ft. ( 3 m.) 12 sec.