GE DigitalFlow GC868, Руководство по программированию

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Programming Site Data 1-23
April 2008
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. Use the [
←]
and [
→]
and the
[F1]-[F4]
keys to select the desired
slot number.
2. 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.
3. Enter a label of up to eight characters and press
[ENT]
.
4. 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.
5. Enter the Zero Value for the low end of the chosen input range and
press
[ENT]
.
6. Enter the Full Scale Value for the high end of the chosen input
range and press
[ENT]
.
7. 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.
Entering the Zero Cutoff
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
[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.