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6
2.3
Buttons
Use the ‘Down’ button to start sampling of the purge gas. The screen will
change from ‘
- - . - -
’ to the O2 concentration in either percentage (>=
1% O2) and PPM (< 1% O2).
Pressing the ‘Down’ button again will stop the sampling and the HPM
returns to standby mode.
Press and hold the ‘Up’ button to initiate the periodic user calibration, i.e.
‘zeroing’; see Section
2.12
for further details on ‘zeroing’.
Press and hold the ‘Down’ button to reset / delete the user calibration.
Press the ‘Log’ button to start the HPM logging; see Section
for further
details on data logging.
Press and hold the ‘Reset’ button to enter the setup menu to select the
required logging mode and adjusting the limits.