Points To Consider - CODEL Energy Tech 401 Installation, Operation And Maintenance Manual

3.4.1

Points to Consider

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Issue: A Revision: 1 Date: 24/07/19
path length
- too long (>8m) - low energy available
- too short (<0.5m) - optical problems
flue gas temperature
- too low (<dewpoint) - potential water droplets
o
- too high (>300 C) - reduced sensitivity.
ambient temperature
o
- too low (< -20 C) - condensation on lenses
o
- too high (> +70 C) - potential instrument problems
measurement range
- minimum range depends upon acceptable measurement uncertainty,
which is 10ppm.metres, e.g. for the level of uncertainty to be below 2%
of range, the minimum range would be 500ppm. metres
Note : 10 ppm CO =
- for increased sensitivity (reduced uncertainty of measurement) the path
length must be maximised.
- maximum range: 6000ppm.metres
Note : To correct ppm.metres to effective ppm, divide by the pathlength.
Ref: 100606
Section 3
Installation Instructions
3
12.5 mg/m
CO
Page: 31