INFICON Helium Leak Detector Modul1000 - Manual (Page 99)

Technical Data
9-11
jinb
80
e1
-h
Op
er
at
in
g M
a
nua
l
(1
01
1)
p1 (Inlet pressure) / p2 (Fore-vacuum pressure) UL200
The inlet pressure p1 or the fore-vacuum pressure p2 is displayed. This assignment
refers to the logarithmic recorder output of the leak detector UL200.
Pressure logarithmic:
U = 1 to 10 V; 0.5 V/decade starting with
1 V = 1·10 -3 mbar / 1·10 -3 Pa
LR lin
The leak rate output voltage is linearly scaled. The output voltage is 0 - 10V. The
upper limit (refers to 10 V) and the scale division (in Volt/decade) is set via the
optional control unit in "Scale recorder output".
LR log
The leak rate output is logarithmically scaled. The output voltage is 1 … 10 V in
optional steps from 0.5 to 10 volts per decade. The scale (in volts/decades) is set via
the optional control unit in "Scale recorder output".
Example for signal LR log:
The upper limit value is set to 10
-5
mbarl/s (= 10 V)
Scale division is set to 5 V/decade.
The lower limit is at 10
-3
mbarl/s (= 0 V)
LR mantissa:
The leak rate mantissa is linearly displayed from 1…10V.
Fig. 9-1 TPR-characteristics (P1, P2; Recorder Output)