2002 by ELTRA GmbH Germany – January 2002 – Service Manual OH 900 / ON 900 / ONH 2000
3.1-2
How CO
2
detectors ( used for the O-channel ) can be recognized:
Square window Round window
Initial option: without any Later option: with type No.:
type number. 407M36-611.
In case the infrared detectors are to be replaced, you can recognize them as described
above.
1 black marked tube connection
2 yellow marked tube connection
3 red marked tube connection
In reinstalling the infrared cell unit in the analyser, you must pay attention to the color
markings of the tubes and their connections.
CO
1
2
3
CO
2
2
sw
ge
3- 1- 2
rt
10
11
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