Chapter 1. Programming Site Data
20 DigitalFlow™ GF868 Programming Manual (1-Channel)
1.9.8 Setting Up Temperature and Pressure Inputs
The Model GF868 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 [F4] =T,P.
1.9.8a Entering the Temperature Input
2. At the Temperature Input prompt, press [F1] to enter a constant temperature value or press [Fx] to select the option
card in Slot x that will supply the live temperature input.
Note: Each slot that contains an option card with an analog input assigned to TEMP or an RTD input will appear on
the option 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:
• If you selected FIXED, enter the known fixed process temperature. Press [ENT]. (The meter will only accept values
from –148° to 662°F.)
• If you selected SLOT X,
a. Press
[F1] to select input A or press [F2] to select input B.The 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.
1.9.8b Entering the Pressure Input
4. At the Pressure Input prompt, press [F1] to enter a constant pressure value or press [Fx] to select the option card in
Slot X that will supply the live pressure input.
Note: Each slot that contains an option card with an analog input assigned to PRESR will appear on the option bar. If
the process pressure is stable, a fixed value may be used, but most applications require a live pressure input.
5. Do one of the following:
• If you selected FIXED, enter the known fixed process pressure. Press [ENT]. (The meter will only accept values
from 0–5000 psia.)
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