54 Description of the Menu
iina74e 06.fm technical handbook(1408)
6.4.4 Units
• Main Menu > Trigger & Alarms > Units
The preferred leak rate unit can be selected. There is the choice of 4 (mbar, Pa, Torr,
atm)pressure units and 5 leak rate units (mbar l/s, Pa m
3
/s-1, Torr l/s, atm cc/s).
Notice: In Sniff mode the following measuring units are selectable additionally
(Refer to Chapter Chapter 6.3): ppm, g/a eq (helium leak rate is equivalent
with leak rate R134a), oz/gr eq (helium leak rate is equivalent with leak rate
R134a).
6.4.5 Alarm delay
• Main Menu > Trigger & Alarms > Alarm delay
In some applications (for instance during pump down in a „chamber test system“) it
might be necessary to block an alarm for some time after pressing START.
This delay time of the alarm can be changed.
After pressing START the loudspeaker is activated as soon as the leak rate
drops below trigger level 1 or after the entered alarm delay time has elapsed.
This setting is only active for the audio alarm types SETPOINT and
TRIGGER ALARM (
See Chapter 6.4.6).
Softkey 2: Arrow up
Scroll up to select a pressure unit.
Softkey 3: Arrow down
Scroll down to select a pressure unit.
Softkey 6: Arrow up
Scroll up to select a leak rate unit.
Softkey 7: Arrow down
Scroll down to select a leak rate unit.
Softkey 3: Arrow down
Decrease the delay time. The minimum value is 0 seconds.
Softkey 7: Arrow up
Increase the delay time. The maximum value is 10 minutes up to infinity.
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