Setting Up Temperature And Pressure Inputs - GE DigitalFlow GC868 Programming Manual

April 2008
Setting Up Temperature
and Pressure Inputs
Entering the Temperature
Input
Entering the Pressure
Input
1-24
Note: This option only appears if you have selected "Standard" as
the equation type in the
10.
The Model GC868 can use either fixed temperature and pressure
quality values or live measurement inputs to calculate standard
volumetric or mass flow. Complete the following steps to configure
these inputs:
1. At the main I/O menu prompt, press
2. At the Temperature Input prompt, press
temperature value or press
that will supply the live temperature input.
Note: Each slot that contains an option card with an analog input
TEMP
assigned to
bar. If the process temperature is stable, a fixed value may be
used, but most applications require a live temperature input.
3. Do one of the following:
•
FIXED,
If you selected
temperature. Press
from –148° to 662°F.)
•
SLOT X,
If you selected
[F1]
a. Press to select input A or press
inputs were labeled during setup.
Note: The set up of input A is used as an example. Identical
procedures would be used to set up input B.
b. Enter the Base Temperature (from –148° to 662°F), and press
[ENT]
. The ratio of this value to the actual temperature is used to
calculate the standard volumetric flow.
4. At the Pressure Input prompt, press
pressure value or press
will supply the live pressure input.
Note: Each slot that contains an option card with an analog input
PRESR
assigned to
pressure is stable, a fixed value may be used, but most
applications require a live pressure input.
5. Do one of the following:
•
FIXED
If you selected
[ENT]
Press . (The meter will only accept values from 0–5000
psia.)
SYSTM
submenu, as shown on page 1-
[F4] =T,P.
[F1]
to enter a constant
to select the option card in Slot x
[Fx]
RTD
or an input will appear on the option
enter the known fixed process
[ENT]
. (The meter will only accept values
[F2]
to select input B.The
[F1]
to enter a constant
[Fx]
to select the option card in Slot X that
will appear on the option bar. If the process
, enter the known fixed process pressure.
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