DigitalFlow™ XGS868i Programming Manual
13
Chapter 1. Programming Site Data
1.7.7 Base Pressure
10.
Enter the
Base Pressure
and press
[Enter].
The ratio of this value to the actual pressure is used to calculate the
standard mass flow rate.
1.7.8 Low Pressure Switch
11.
Scroll to
Yes
or
No
to activate or deactivate the
Low Pressure Switch
software function and press
[Enter].
•
If you selected
Yes
, enter the
Pressure Limit
, the low pressure switch set point, and press
[Enter].
The acceptable
range is 0 to 5,000 psia. The meter will stop taking readings if the pressure drops below this value.
•
If you selected
No
, go to
Quality Input
(step 12) below.
1.7.9 Quality Input
When the temperature and pressure inputs indicate that the steam is saturated, the
Quality Input
value is used for the
mass flow rate calculations. Unless a different value is accurately known, accept the default value at the following
prompt:
Note:
The quality value indicates what fraction of the fluid is in the gas phase. The remaining fraction is assumed to
be liquid water. Thus, a quality value of 1.0 indicates 100% gas.
12.
At the
Quality Input
prompt, scroll to a fixed steam quality value or to set up the option card in
Slot
1 that will
supply the live steam quality input and press
[Enter].
Note:
If Slot 1 contains an activated option card with an analog input that has been programmed as
Special
, Slot 1
appears as an option at the above prompt. Normally, a fixed value of 1.0 (100% steam) should be used for the
steam quality value.
If there is no active option card for a special input, the meter assumes you are using a fixed quality value.
•
If you selected
Fixed
, proceed to Step 13.
•
If you selected
Slot 1
, proceed to Step 14.
13.
Enter the known
Fixed
steam
Quality
and press
[Enter].
(The meter will accept values from 0.0000 to 1.0000.) Go
to
Procedure Options
below.
14.
Scroll to
Input A
or
Input B
and press
[Enter].
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.
Procedure Options
After completing the above steps, the XGS868i returns to the
Channel PROGRAM
window. Do one of the following:
•
To continue programming, refer to Appendix A,
Menu Maps
, to navigate to the desired menu.
•
To leave the
Keypad Program
, press
[Escape]
three times.
Summary of Contents for DigitalFlow XGS868i
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