Inficon 540-200, Перевод оригинальной инструкции по эксплуатации

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INFICON Operation | 6
T-Guard2_Operating-instructions-jina85en1-13-(2009) 53 / 90
Pressure limits If the value of the lower pressure limit is exceeded, this indicates a blocked filter. If the
value of the upper pressure limit is exceeded, this indicates a leaking measurement
line or a malfunctioning fore pump.
The device issues a warning if a limit is exceeded.
Limit Pressure
Lower pressure limit 10 ... 350 mbar
Upper pressure limit 250 ... 800 mbar
Required gap between lower and upper
limit
> 100 mbar
► In the main menu, select “Settings > Monitoring > Pressure limits”.
Waiting and purge time
You can set a time in which you can open the measurement chamber and remove the
test object. The measurement chamber must be completely purged with fresh air. If
the waiting time has expired or the measurement chamber has been purged, the
device automatically sucks air in and uses it to purge the measurement line and the
sensor.
► Select “Settings > Measurement settings > Set times > Wait time purge”.
Setting range: 1 ... 300 sec.
The duration of the purge time can also be set:
► Select “Settings > Measurement settings > Set times > Purge time".
Setting range: 1 ... 50 sec.
The larger the leak, the greater the purge time should be. During the purge time, the
device checks the helium concentration and issues a warning message if there is still
too much helium in the chamber. INFICON recommends a purge time of > 4 sec.
Automatic purging can also be switched off. Then you have to manually begin the
purge after each measurement.
► Select “Settings > Measurement settings > Set times > Purge time (+ on/off)”.
To purge manually, you must activate the required key beforehand:
► Select “Settings > Key functions”.
The corresponding interface command can be found in the interface description
(jins85e1-e).
Be aware that you cannot manually purge during a turbo measurement, because the
brevity of the measurement is paramount.