Author Topic: testing of beam detectors (Read 6038 times)

andy@swift · « **on:** March 13, 2007, 10:43:45 PM »

hi,

for reference, whats the correct way for testing beam detection on routine maintenance visits, thanks andy

Wiz · « **Reply #1 on:** March 14, 2007, 08:37:36 AM »

Most infra red beam automatic smoke detectors are supplied with a light obscuration filter graded for different levels that can be used for commissioning and testing. This can be used, at the various levels, to obstruct the path of the light can be used to check the correct function of fault and fire conditions.
Although it seems obvious, the requirement when testing any piece of equipment, is just to find ways of testing all the functions and facilities that the piece of equipment is deemed to require in it's particular application and normal operation!

monkeh · « **Reply #2 on:** March 14, 2007, 08:51:56 PM »

the main problem with testing beam detectors is that by their design, they're usually installed to cover vast areas, normally warehouses and roof voids in my experience, so the main difficulty is actually getting to them. i've seen me on my 3 tier ladders with my filter taped to my fully extended solo pole swaying like a drunk. and the last thing you want to do is touch the transmitter or reciever. knock it out of allignment and you face a hell of a job lining some of them up again

Graeme · « **Reply #3 on:** March 14, 2007, 10:13:52 PM »

That's why the new self aligning ones with a low level controller with self test mode are a engineers best friend.

monkeh · « **Reply #4 on:** March 14, 2007, 10:38:39 PM »

Quote from: Graeme

That's why the new self aligning ones with a low level controller with self test mode are a engineers best friend.

far too high tech and engineer helping for our place

David Rooney · « **Reply #5 on:** March 15, 2007, 11:03:49 PM »

Quote from: Wiz

Most infra red beam automatic smoke detectors are supplied with a light obscuration filter graded for different levels that can be used for commissioning and testing. This can be used, at the various levels, to obstruct the path of the light can be used to check the correct function of fault and fire conditions.
Although it seems obvious, the requirement when testing any piece of equipment, is just to find ways of testing all the functions and facilities that the piece of equipment is deemed to require in it's particular application and normal operation!

Bubble wraps no good then ......!?

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Author Topic: testing of beam detectors (Read 6038 times)

Graeme