INFICON Helium Leak Detector Modul1000 - Manual (Page 98)

9-10
Technical Data
jinb
80
e1
-h
Op
er
at
in
g M
a
nua
l
(1
01
1)
9.4 Analogue Output
The 4-pin Phönix-connector box is located at the back of the device and is marked
with "RECORDER".
The analogue recorder outputs may be used to log the leak rate, the inlet pressure
and the fore-vacuum pressure. The recorder output values are updated every 50 ms.
Both recorder outputs can be set individually for the output of leak rates and pres-
sures. The measured values are provided as an analogue signal in the range of 0 V
… 10 V. The resolution is limited to 10 mV. The instrument which is connected to the
recorder output (e. g. an X(t) recorder) should have an input resistance of > 2.5
kOhm. The test voltages are applied to pins 1 and 4. The reference potential (GND)
is connected to the pins 2 and 3. The pins are numbered consecutively from the left
to the right side.
Accuracy of the plotter outputs:
± 50mV offset plus
± 1% from the measured value (current output voltage) as linearity deviation
(at 25°C)
Notice: The chart recorder outputs are electrically isolated from other plugs. If, in
spite of this, hum interference occurs, we recommend supplying the
Modul1000 and the recorder by the same mains phase. If this is not
possible, you must make sure that the frame ground of both instruments is
kept at the same potential.
9.4.1 Configuration of the analogue outputs
Various types of presentations are provided for displaying the measured values
(assignments) for the analogue output. The different assignments can be selected
via the optional control unit.
OFF
The recorder output is switched off.
p1 (inlet pressure) / p2 (fore-vacuum pressure)
The output voltage of the pressure gauges for the Inlet pressure p1 or the fore-
vacuum pressure p2 is displayed.
The leak rate is recorded on a logarithmic scale.
The signals p1 and p2 behave like the characteristics of the TPR265.
Pin Assignment
1 Analog 1
2 GND (reference potential)
3 GND (reference potential)
4 Analog 2