65
5 Maintenance
Sensitivity
The
sensitivity
is adjusted under
Gas mixture
in the menu. The
following parameters are adjusted in a single step:
●
Sensitivities of CH
4
, CO
2
, H
2
S and CO
●
Zero point of O
2
5.2.4
Preparation
Carrying out an adjustment always takes some time. Leave your-
self plenty of time to prepare the necessary steps of the procedure.
●
Have all necessary tools available.
●
Let the device run for several minutes,to guarantee that the
temperature is correct, for example.
Note:
When adjusting the gas-sensitive semiconductor (
Inspection
above ground
and
Structure/Plants
groups), you must apply
a
conditioner
.
●
SEWERIN recommends applying separate conditioners for
methane CH
4
on the one hand and propane C
3
H
8
/
butane C
4
H
10
on the other.
●
The conditioner must already be connected during the run-
ning-in period.
5.2.5
Performing the adjustment
The zero point and sensitivity are adjusted following the same
procedure for all gases. The adjustment of
oxygen
is an
excep-
tion
. For this reason it is described separately (see section 5.2.6
).
You can access detailed information on the adjustment
of the various gases (for example, test gas concentra-
tion, installation date of the sensor, or date of the last
adjustment) under
Information
.
The symbol appears after the corresponding
Adjust-
ment …
menu item has been selected.
