Setting Up Rtd Inputs; Entering The Zero Cutoff - GE DigitalFlow GC868 Programming Manual

Setting up RTD Inputs

Entering the Zero Cutoff

Programming Site Data
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. Use the [←] and [→] and the
slot number.
[F1]
2. Press to set up RTD input A or
Note: The setup of RTD input A is used as an example. Identical
procedures would be used to set up RTD input B.
3. Enter a label of up to eight characters and press
4. At the Input Measurement prompt, press
input A and return to the previous prompt, or press
enable RTD input A.
5. Enter the Zero Value for the low end of the chosen input range and
[ENT]
press .
6. Enter the Full Scale Value for the high end of the chosen input
[ENT]
range and press
[F1] [F2]
7. Press - to set up another input or press
another slot for set up.
For instructions on setting up additional inputs and/or outputs
proceed to the appropriate section. Otherwise, press
I/O
the main menu prompt.
Near zero flow, the Model GC868'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
2. Enter the desired Zero Cutoff value and press the
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.
[F1]-[F4]
keys to select the desired
[F2]
to set up RTD input B.
[F1] = OFF
.
[F3] = ZERO.
April 2008
[ENT]
.
to disable RTD
[F2] = TEMP
to
[EXIT]
to select
[EXIT]
to return to
[ENT]
key. A
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