278 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Put Fidas24 into standby mode
If the softkeys STANDBY or STANDBY PURGE are displayed in the menu
Standby/Restart FID, the Fidas24 can be put into standby mode:
STANDBY
Standby mode is activated.
STANDBY
PURGE
Standby mode with opening of the zero gas valve to purge the
detector is activated (only in version with test gas connection).
Put Fidas24 into measurement mode again
If the Fidas24 can be restarted from standby mode or after a flame error, the
softkey RESTART is displayed in the menu Standby/Restart FID:
RESTART
The restart is initiated.
After initiation of the restart, the menu can be quit with Meas or Back; the
restart sequence is continued.
However, the restart sequence can also continue to be observed in the menu.
The current values for the flame temperature, combustion air pressure and
combustion gas pressure as well as the number of ignition attempts are
displayed.
If ignition of the flame has failed after 10 attempts, for the parameter
Ignition attempts 10 - failed is displayed. By pressing the softkey
RESTART another restart can be initiated.
Fidas24 in fail-safe status
If a serious fault has occurred in the analyzer module, the analyzer module is
put in fail safe status; in the menu Standby/Restart FID the indication
Fail safe appears for the parameter Status.
Fail-safe status: heater off, combustion gas valve closed, instrument air
valve closed, housing purging on, zero gas valve open.
The cause of the failure must be determined from the status messages (see
page 322).
A cold restart in the menu is not possible; after fault correction the gas ana-
lyzer must be cold restarted by switching off and on again.
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