INFICON UL5000 Dry Helium Leak Detector - Manual (Page 55)

Description of the Menu
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6.4.6 Audio alarm type
• Main Menu > Trigger & Alarms > Audio alarm type
The trigger of the audio alarm can be switched on or off.
6.4.6.1 Pinpoint
The tone of the acoustical signal changes its frequency only in a LR-window Fig. 6-
6 which ranges from one decade below the Trigger level 1 up to one decade above
the Trigger level 1. Below the window the tone is constantly low , above the window
it is constantly high.
Example: The Trigger level 1 is 4×10
-7
mbar l/s. So the window where the tone
changes reaches from 4×10
-8
mbar l/s up to 4×10
-6
mbar l/s.
6.4.6.2 Leak rate prop.
The frequency of the accoustic output is proportional to the reading on the bargraph
display. The frequency ranges from 200 Hz to 1300 Hz. See Chapter
6.2.1 Scale
linear/logarithmic for the definition of the number of decades.
Softkey 2: Pinpoint
See Chapter 6.4.6.1
Softkey 3: Leak rate prop.
The sound will be proportional to the leak rate signal. See Chapter 6.4.6.2
Softkey 6: Setpoint
See Chapter 6.4.6.3
Softkey 7: Trigger alarm
An alarm sounds when the trigger 1 is exceeded. See Chapter 6.4.6.4
Fig. 6-6: Pinpoint