The menu » Calibration «
Page 42 of 72 Pages
9023927 - 2nd edition - May 2007
— The message » Fresh-air calibration running « is displayed.
●
Expose the sensor to the ambient air (for some sensors, a zero gas such as N
2
— The values for the calibration gas are displayed, for example,:
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 »
« key.
—
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.
If these are correct as displayed:
●
Select » Accept value « and press the »
« key.
Cal. gas
: NF
3
Unit
: ppm
Concentr.
: 000025
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!
OK
OK