Oldham OLCT 20, Руководство пользователя

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8
– Technical Specifications
23
Gas Molecular
formula LEL
(% v/v)
UEL
(% v/v)
CH4
coef. H2
coef. C4H10
coef. C5H12
coef.
Styrene (vinyl
benzene)
C
8
H
8
1.1 8.00 6.30 3.35 3.00
Premium unleaded
gasoline (95)
- 1.10 ~6.0 1.80 0.95 0.90
Toluene
C
7
H
8
1.20 7 4.00 2.15 1.90
Turpentine oil
-
0.8 6.0 3.50 1.85 1.70
Triethylamine C
6
H
15
N 1.20 8 2.05 1.10 1.00
White spirit
mixture
1.10 6.50 3.50 1.85 1.70
Xylene
C
8
H
10
1.00 7.60 4.00 2.15 1.90
Items in gray: recommended gas for calibrating the detector.
Example
Calibration of an “acetone” detector using a calibration gas with 1% butane
Value to be displayed:
1% (injected butane) x 100 x 0.90 (butane/acetone coefficient) = 60% LEL
1.5% (butane LEL)
Note:
■
LELs vary according to the source.
■
Coefficients are accurate to ± 15%.