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April 2009
Path Parameters for Clamp-On Transducers
The PT878GC path menu includes two parameters for clamp-on
transducers:
•
Traverses
•
Spacing
1. The PT878GC first prompts for traverses, the number of times
the ultrasonic signal crosses the pipe.
a. Press
[ENTER]
numbers.
b. Scroll to the appropriate number.
c. Press
[ENTER]
2. The next prompt displays the spacing of the transducers, as
calculated from the information entered.
a. Record this number and use it to space the transducers.
(Use Chapter 3 to assist in installing transducers on the
pipe.) Press the [ ] key to scroll to the next parameter.
b. If necessary, you can overwrite the spacing to match the
actual physical spacing of the transducers. (Do not change
the spacing by more than ±10% from that calculated by the
meter.) Press
desired value, and press
enter an invalid entry, the PT878GC rejects the entry and
displays an error message.
Note: GE Sensing does not recommend using a spacing other
than the one calculated by the PT878GC.
After you enter the spacing, pressing the [
prompt to the Traverses box, and then to the Path tab at the top of
the screen.
•
To confirm the entries and return to Operate mode, press
(OK).
•
To leave the window without confirming the entries and return
to Operate mode, press
4-16
to open the drop-down list of traverse
to confirm the entry.
[ENTER]
. Use the numeric keys to enter the
[ENTER]
[F2]
(Cancel) or the
to confirm the entry. If you
] key returns the
[ESC]
key.
Programming Site Data
[F3]
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