INFICON UL1000 Helium leak detector - Manual (Page 64)

64
Description of the Menu
iina
70
e 0
6
.f
m
te
chn
ica
l ha
nd
boo
k
(1
40
8)
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 acustical signal changes its frequency only in a LR-window Fig. 6-10
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 300 Hz to 330 Hz. Please
refer to Chapter 6.2.1
Scale linear/logarithmic for the definition of the number of decades.
Softkey 2: Pinpoint
Use this function to localize a leak with a well-known size. Please refer to Chapter 6.4.6.1
Softkey 3: Leak rate prop.
The sound will be proportional to the leak rate signal. Please refer to Chapter 6.4.6.2
Softkey 5: ?
Help
Softkey 6: Setpoint
Please refer to Chapter 6.4.6.3
Softkey 7: Trigger alarm
An alarm sounds when the trigger 1 is exceeded. Please refer to Chapter 6.4.6.4
Fig. 6-10: Pinpoint
f
LR Tr. 1 0.1 • Tr. 1 10 • TR. 1
2570 Hz -
491 Hz -