Inficon 540-200, Перевод оригинальной инструкции по эксплуатации

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6 | Operation INFICON
52 / 90 T-Guard2_Operating-instructions-jina85en1-13-(2009)
► In the main menu, select “Trigger > Trigger level 1” or “… Trigger level 2”.
Setting range:
• Trigger level 1 1.0 × 10
-6
to 15 mbar l/s.
• Trigger level 2 2.5 × 10
-5
to 15 mbar l/s.
He concentration To measure with a helium concentration of 100%, you must evacuate the test object
before adding the helium. In all other cases, work is carried out with diluted helium and
the concentration must be set.
The device modifies the measurement time based on the concentration.
► In the main menu, select “Settings > Measurement settings > He concentration”.
Under certain conditions, the measurement time changes and the displayed cycle time
therefore does not change:
Accumulation measurement: If a turbo measurement is triggered as a result of the low
He concentration or if the measurement time has already reached the maximum
length.
Carrier gas measurement: If the measurement is carried out as a GROSS
measurement or if the measurement time has already reached the maximum length.
Length of the line The measurement line length is important for the measurement time, and you must set
the line length. The setting causes the automatic addition of a lead time before the
measurement.
► In the main menu, select “Settings > Measurement settings > Line length”.
Contamination limit Where possible, set the contamination limit low to protect the sensor from helium
contamination. The measurement stops when the contamination limit has been
reached.
Contamination limit Measuring time Measurement result
low 30 s 40 ppm
normal 30 s 75 ppm
high 30 s 200 ppm
► In the main menu, select “Settings > Monitoring > Contamination limit”.