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The menu » Calibration «
— The message » Fresh-air calibration running « is displayed.
Expose the sensor to the ambient air (for some sensors, a zero gas such as N
must be used – see the information in the section "Zero point calibration / adjust-
ment" on page 39).
Afterwards:
— The values for the calibration gas are displayed, for example,:
Cal. gas
: NF
3
Unit
: ppm
Concentr.
: 000025
The current value and the calibration gas concentration are now displayed.
The calibration operation depends on whether the selected calibration gas supports
so-called autostability.
— Autostability is supported:
When the displayed value has stabilised:
Select » Calibrate « and press the »
— Autostability is not supported:
The instrument evaluates the stability of the signal and automatically executes the
calibration procedure.
— The required value and the actual value are now displayed.
Disconnect the flow of calibration gas.
Attention: There is a danger after the gas is removed that an alarm is given
on the central controller while the gas is returning to normal level!
If these are correct as displayed:
Select » Accept value « and press the »
Page 42 of 72 Pages
« key.
OK
« key.
OK
2
9023927 - 2nd edition - May 2007
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