DigitalFlow™ GF868 Programming Manual (1-Channel) 19
Chapter 1. Programming Site Data
1.9.6 Setting up RTD Inputs
Option cards with RTD inputs have a temperature range of –100° to 350°C. Complete the following steps to set up the
two RTD inputs of an option card installed in Slot x:
1. Press [F1] to set up RTD input A or [F2] to set up RTD input B.
Note: The setup of RTD input A is used as an example. Identical procedures would be used to set up RTD input B.
2. Enter a label of up to eight characters and press [ENT].
3. At the Input Measurement prompt, press [F1] = OFF to disable RTD input A and return to the previous prompt, or
press [F2] = TEMP to enable RTD input A.
4. Enter the Zero Value for the low end of the chosen input range and press [ENT].
5. Enter the Full Scale Value for the high end of the chosen input range and press [ENT].
6. Press [F1]-[F2] to set up another input or press [EXIT] to select another slot for set up.
For instructions on setting up additional inputs and/or outputs proceed to the appropriate section. Otherwise, press
[EXIT] to return to the main I/O menu prompt.
1.9.7 Entering the Zero Cutoff
Near zero flow, the Model GF868’s readings may fluctuate due to small offsets caused by thermal drift or similar
factors. To force a zero reading when there is minimal flow, enter a zero cutoff value as described below:
1. At the main I/O menu prompt, press [F3] = ZERO.
2. Enter the desired Zero Cutoff value and press the [ENT] key. A value of 0.1 ft/s (0.03 m/s) is recommended, but
values from 0–1 ft/s (0–0.3 m/s) are acceptable. The menu returns to the main I/O prompt.
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