sewerin VARIOTEC 480 EX - Setting Ranges for Gas Types; Limit Values for the Device Inspection

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7 Appendix
7.2.4 Setting ranges for gas types
LEL values are specied as per/12/ and /14/.
The setting for AL1 must not exceed the setting for AL2.
Gas type AL1 AL2
All C
x
H
y
in
% LEL
Threshold 10 % LEL 50 % LEL
CH
4
Threshold 0.45 % vol. 2.20 % vol.
Setting range 0.20 – 2.60 % vol. 0.25 – 2.65 % vol.
Increment 0.05 % vol. 0.05 % vol.
C
3
H
8
Threshold 0.17 % vol. 0.86 % vol.
Setting range 0.08 – 1.00 % vol. 0.10 – 1.02 % vol.
Increment 0.02 % vol. 0.02 % vol.
C
4
H
10
Threshold 0.14 % vol. 0.7 % vol.
Setting range 0.08 – 0.82 % vol. 0.10 – 0.84 % vol.
Increment 0.02 % vol. 0.02 % vol.
O
2
Threshold 18.0 % vol. 23.0 % vol.
Setting range 0.5 – 20.5 % vol. 21.2 – 25.0 % vol.
Increment 0.1 % vol. 0.1 % vol.
CO
Threshold 30 ppm 60 ppm
Setting range 5 – 499 ppm 6 – 500 ppm
Increment 1 ppm 1 ppm
Factory settings in bold
7.3 Limit values for the device inspection
Gas Zero point Sensitivity
Specication Deviation Specication Deviation
CH
4
0.00 % vol. ±0.15 % vol. 2.20 % vol. ±0.20 % vol.
C
3
H
8
0.00 % vol. ±0.12 % vol. 1.00 % vol. ±0.16 % vol.
C
4
H
10
0.00 % vol. ±0.12 % vol. 1.00 % vol. ±0.16 % vol.
O
2
0 % vol. ±0.5 % vol. 20.9 % vol. ±0.5 % vol.
CO 0 ppm ±3 ppm 40 ppm ±3 ppm