Inficon PGE500, Руководство по эксплуатации

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tinb21e1 (2016-06)
7.6 Linear Analog Output
0-10 V, Torr
The PGE500 analog output may be setup to provide a
0-10 V (dc) output signal that has a direct linear relationship to
the displayed pressure. When preparing to setup and process
the linear analog output signal, first define the following para-
meters that you will program into the PGE500.
•
Minimum measured pressure (for the defined analog output
range)
•
Minimum output voltage desired (proportional to the minimum
pressure)
•
Maximum measured pressure (for the analog output signal
range)
•
Maximum output voltage desired (proportional to maximum
pressure)
Constructing a table of these parameters may be useful in docu-
menting the relationship of displayed pressure to the analog out-
put voltage. For example, the following table is representative of
a typical setup where;
Min P = 1.00E-03 Torr
Min Voltage = 0.01 Volts
Max P = 1.00 Torr Max Voltage = 10 V
Linear Analog Output
Voltage - volts
Measured (Displayed)
Pressure - torr
0.01 1.00E-03
0.10 1.00E-02
1.00 1.00E-01
10.00 1.00E+00
It is recommended that the Linear output signal be setup such
that the range covers, at most, 3 decades of pressure change.
For example, if the minimum pressure selected is 1 mtorr
(1.00E-03 torr) with a corresponding minimum voltage output of
0.01 volts, then the maximum pressure selected to correspond to
a maximum voltage of 10.0 volts should not exceed 1.00 torr.