Programming Site Data
1-13
March 2008
Entering Pipe Data
Enter the transducer and pipe parameters via the
PIPE
submenu. While
following the programming instructions, refer to the menu map in
Figure A-1 on page A-1 in Appendix A,
Menu Maps
.
1.
At the
Channel Program
screen, press
[F3]
to program the
PIPE
submenu.
Transducer Number
2.
Enter the
Transducer Number
(normally engraved on the head of
the transducer). Press
[ENT]
. If there is no engraved number,
complete the steps below. Otherwise, proceed to step 3.
IMPORTANT:
Special transducers, which have no engraved
number on the head, are rarely used. Examine the
transducer head carefully for a number.
a.
Assign a number between 91 and 99 to the
Special Transducer
and press
[ENT]
. (The meter will only accept values from 1 to
199.)
b.
Use the [
→]
and
[F1]-[F4]
keys to select the
Frequency
of the
special transducer. The meter can not transmit an excitation
voltage at the transducer’s natural frequency without this data.
c.
Enter the special transducer
Time Delay (Tw)
value supplied by
the factory. Press
[ENT]
. (The meter will only accept values
from 0 to 1000
μ
sec.)
Note:
Tw is the time required for the transducer signal to travel
through the transducer and its cable. This time delay must be
subtracted from the transit times of the upstream and
downstream transducers to ensure an accurate measurement.
Pipe OD
3.
Enter the known
Pipe OD
or circumference and use the
[F1]-[F4]
keys to select the appropriate units. Press
[ENT].
(The meter will
only accept values from 1/8 to 648 in.) The option bar choices
may appear in English or Metric units.
Obtain the required information by measuring either the pipe outside
diameter (OD) or circumference at the transducer installation site.
The data may also be obtained from standard pipe size tables.
Table 1-4 below lists the available English and metric OD units, as
specified in the
GLOBL
submenu.
Table 1-4: Available Pipe OD Units
English
Metric
inch = pipe OD in inches
mm = pipe OD in millimeters
feet = pipe OD in feet
m = pipe OD in meters
in/PI = pipe circumference
in inches
mm/PI = pipe circumference
in millimeters
ft/PI = pipe circumference
in feet
m/PI = pipe circumference
in meters
Summary of Contents for DigitalFlow GS868
Page 7: ...Chapter 1 ...
Page 59: ...Chapter 2 ...
Page 77: ...Chapter 3 ...
Page 90: ...Chapter 4 ...
Page 104: ...Chapter 5 ...
Page 110: ...Chapter 6 ...
Page 122: ...Appendix A ...
Page 131: ...Appendix B ...
Page 132: ...Data Records Option Cards Installed B 1 Initial Setup Data B 2 ...
Page 136: ...Appendix C ...
Page 156: ...Appendix D ...