Head
GA10218_0101 - 5/2002
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2.2.2.4 Recorder
The recorder output
Fig. 3
/7 may be used to chart the leak rate, the inlet
pressure and the forevacuum pressure. Both recorder activities can be
adjusted individually for showing leak rates and pressures.
The measured values are provided by way of 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. X(t) chart recorder) should
have an input resistance of no less than 2.5 k
Ω
. The measured values are
available through pins 1 and 4. The reference potential (GND) is available
at pins 2 and 3. The contacts are numbered from bottom to top.
The chart recorder outputs are electrically isolated from other plugs. If, in
spite of this, hum interference is apparent it is recommended to operate
the PhoeniXL and the chart recorder from the same mains phase. If this is
not possible, you must make sure that the frame ground of both instru-
ments is kept at the same potential.
For further information see chapter
6.6.4.2
and
6.6.4.6
.
2.2.2.5 RS232
This RS232 interface
Fig. 3
/5 is wired as data communication equipment
(DCE) and permits the connection of a personal computer (PC) for monito-
ring and data logging. The connection is made through a 9 pin sub-D sok-
ket. For more information refer to chapter
6.6.4.3
and the Interface
Description.
Pin
Assignment
1
Analog 1, leak rate, inlet pressure P1 or forevacuum pressure P2
2
GND
3
GND
4
Analog 2, leak rate, inlet pressure P1 or forevacuum pressure P2
Pin
Assignment
1
24 V switchable, default setting 0
2
TXD
3
RXD
4
GND 24V
5
GND
6
DSR
7
CTS
8
RTS
9
free
