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DigitalFlow™ GF868 Programming Manual (2-Channel)
13
Chapter 1. Programming Site Data
1.6.3 Entering Pipe Data (cont.)
1.6.3c Pipe Wall
5.
Enter the known thickness of the
Pipe Wall
, in the same units used for the pipe OD. Press
[ENT]
. (The meter will
only accept values from 0 to 4 in.)
If the pipe wall thickness is not known and cannot be conveniently measured, look up the value in a table of standard
pipe size data or use the Model GF868’s on-line
Help Menu
.
1.6.3d Path Length
6.
Press
[F1]
= inch or
[F2] = feet
to select the units. Then, enter the
Path Length (P)
of the ultrasonic signal. Press
[ENT]
. (The meter will only accept values from 1/8 to 900 in.)
Note:
The factory has calculated both the transducer signal path length
(P)
and the transducer signal axial length
(L)
,
based on the exact transducer configuration used for the application. These values are engraved on the
flowcell and/or are included in the documentation supplied with the meter.
1.6.3e Axial Length
7.
Press
[F1]
= inch or
[F2] = feet
to select the units.Then, enter the
Axial Length (L)
of the ultrasonic signal and press
[ENT]
.
1.6.3f
Reynolds Correction
8.
Press
[F1]
to turn
Reynolds Correction
off, or
[F2]
to turn it on.
Note:
Reynolds Correction is a number based on the Kinematic Viscosity and flow rate of the fluid. It should be
enabled for most applications.
a.
When you enable the Reynolds Correction Factor, you must also enter the
Kinematic Viscosity
of your gas, as
listed in
Sound Speeds and Pipe Size Data.
Use the numeric keys to enter a value, and press
[ENT].
1.6.3g Calibration Factor
9.
Enter a value for the flow
Calibration Factor
and press
[ENT]
. The default value is 1.00. (The meter will only accept
values from 0.5000 to 2.0000.)
1.6.3h Procedure Options
After completing the above steps, the meter returns to the
Channel PROGRAM
prompt. Continue as follows:
•
To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.
Then, proceed to the appropriate section of this manual for instructions.
•
To leave the
User Program
and retain the previous settings, press
[EXIT]
twice and then press
[F1] = NO
at the
SAVE
prompt. Any programming changes will be discarded and you will be returned to the data display.
•
To leave the
User Program
and return to measurement mode, press
[EXIT]
twice and then press
[F2] = YES
at the
SAVE
prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to
the data display.
Summary of Contents for DigitalFlow GF868
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