Operation
GA10218_002_A7 - 9/2015 - © Oerlikon Leybold
63
3.8.7 Audio Alarm Type
Main menu > Trigger & Alarms > Audio alarm type
The audio alarm type can be chosen.
Pinpoint
The tone of the acoustical signal changes its frequency only in a leak rate-window
Fig. 27 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.
Leak rate prop.
The frequency of the acoustic output is proportional to the reading on the bargraph
display. The frequency ranges from 300 Hz to 3300 Hz. Please refer to Chapter
3.6.3 for the definition of the number of decades.
Softkey 2: Pinpoint
This function is for localization of a known leak rate value.
Softkey 3: Leak rate prop.
The sound will be proportional to the leak rate signal.
Softkey 5: ?
Help text
Softkey 6: Setpoint
The sound will be proportional to the leak rate signal only if trigger 1 is
exceeded.
Softkey 7: Trigger alarm
An alarm sounds when the trigger 1 is exceeded.
Fig. 27 Pinpoint: Change of the frequency in the leak rate window (TR1=Triggerlevel 1)
f
LR
Tr. 1
0.1 • Tr. 1
10 • TR. 1
2570 Hz -
491 Hz -
Pinpoint
Leak rate prop.
