INFICON Composer Gas Concentration Controller User Manual
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Composer Operating Manual
1.10.4.3 How to Connect the Instrument for Independent
Control of the Concentration
This Instrument System is also capable of independent control of the
concentration. An analog control voltage is available on the CONTROL OUT
connector for this purpose. This control voltage is intended to be used as the
control input voltage to a mass flow controller. A suggested control
configuration is shown in
.
Figure 1-6 Integration with Reactor Only, Setpoints Provided by Reactor’s Controller
The targeted Concentration Setpoint may be configured either by setting the
appropriate parameter through the Setup Tool or Monitor software or by
applying a precision analog voltage onto the CONTROL IN connector. This
parameter is available for direct entry with the optional LCD display version. If
DIP switch #4 on the CFGR2 switch block is set, the voltage applied to the
CONTROL IN connector will be interpreted by the Instrument System as the
Instrument’s target Concentration Setpoint parameter (normally set through the
Monitor Software or LCD display). When this feature is selected, the voltage at
the CONTROL IN connector V
in
interprets the applied input voltage so that the
Target Concentration Setpoint is:
[1]
where:
max is the value of the max input parameter and diff is the difference
between the Max Input and Min Input parameters.
, SW#4 and SW#7.
min diff
V
in
Input Voltage Range
--------------------------------------------------
+