29
5
Maintenance
5.1.8.2 O
2
Calibrating in the Operating Point with Reference Measurement
•
Activate
MAINTENANCE mode.
NOTICE
At least access level 1 required!
The calibration can be performed by reference measurement using an external measuring de-
vice or by using test gas at a known O
2
concentration (LS2default design only).
For LS2-HT a hose connection for calibration gas through which the test gas (40 ... 60 l/h) can
be input is available.
A special test gas adapter is not required for this type.
Recommended test gas: 3 Vol.% O
2
in N
2
.
NOTICE
When performing a reference measurement using an external measuring device, check if the
measuring device is measuring wet or dry. In the case of devices with an upstream measuring
gas cooler, it always concerns a dry measurement. This also applies to devices which remove
the moisture by means of a chemical substance. The LS2 measures wet. The difference be-
tween a wet to dry measurement is evident from the graphic in chapter
urement Deviations, Conversion Table
.
NOTICE
Calibration or testing with reference air is possible only with O
2
values smaller than 15 Vol.%
and larger than 1 Vol. %.
NOTICE
Do not perform an O
2
calibration with calibration gases
15 % O
2
. Otherwise the calibration
values are rejected and the warnings WH003/0 and WH004/0 are indicated.
Select
in the main menu to run the cali-
bration.
Select
for O
2
calibration.
Содержание KS1D
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