77
Appendix
Kerosene JFUEL (100 % LEL = 0.70 % vol.)
Area of
application
Test gas
Tolerances / fresh
air zero point
Tolerances / test
gas indication
accuracy
ppm range
Replacement test
gas
0.30 % vol. C
3
H
8
in synth. air (dis-
play setpoint
when adding re-
placement gas:
0.32 % vol.)
0 ppm
0.3 to 0.4 % vol.
% LEL range
-0.04 to +0.04 % vol.
(-4 to +4 % LEL)
0.28 to 0.36 % vol.
(44 to 52 % LEL)
% vol. range Adjustment not
possible
–
–
Hydrogen H
2
(100 % LEL = 4.00 % vol.)
Area of
application
Test gas
Tolerances / fresh
air zero point
Tolerances / test
gas indication
accuracy
ppm range
1.0 % vol. H
2
in
synth. air
0 ppm
0.8 to 1.2 % vol.
% LEL range
2.0 % vol.
(50 % LEL) H
2
in
synth. air
-0.12 to +0.12 % vol.
(-3 to +3 % LEL)
1.80 to 2.20 % vol
(45 to 55 % LEL)
% vol. range Adjustment not
possible
–
–
Acetylene C
2
H
2
(100 % LEL = 2.30 % vol.)
Area of
application
Test gas
Tolerances / fresh
air zero point
Tolerances / test
gas indication
accuracy
ppm range
Adjustment not
possible
–
–
% LEL range
1.00 % vol.
(43 % LEL) C
2
H
2
in
synth. air
-0.07 to +0.07 % vol.
(-3 to +3 % LEL)
0.88 to 1.12 % vol.
(38 to 48 % LEL)
% vol. range Adjustment not
possible
–
–
