44
5 Maintenance
Note:
For
Adjustment gas mixture warning
,
all
values must be stable.
The time required for this can vary depending on the specific gas.
6. From the menu select the method you wish to use to adjust
the zero point.
−
e.g. for
Adjustment CH4
:
Zero point
−
for
Adjustment gas mixture warning
:
Fresh air
7. Press
OK
to confirm.
This adjusts the zero point. The reading shows zero
(0.00 % vol./0 ppm). (Except for
Adjustment gas mixture
warning
: the value for oxygen O
2
is 20.9 % vol.)
5.2.5.2 Adjusting the sensitivity
For all gases except oxygen O
2
, the sensitivity is adjusted follow-
ing the same procedure.
The following resources are needed for adjusting the sensitivity:
●
Test gas
Information on test gases for adjustment can be found in Sec-
●
Test set for the supply of test gas (e.g.
SPE VOL
)
Note:
Details of how to use the test set can be found in the accompa-
nying operating instructions.
