April 2004
9-8 Servicing the PT878GC

Entering the Material and Sound Speed (cont.)

If you have selected a preprogrammed material, you have
completed entering data in this window. Pressing the [T] key
returns the program to the Material tab. But if you selected
“Other,” you can also enter a specific sound speed.
3. To enter the sound speed:
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the known sound speed in
the pipe material (from the brochure Sound Speeds and
Pipe Size Data, 914-004).
c. Press [ENTER] to confirm your entry.
To leave the Material window:
•Press the [W ] or [X] arrow key to move to another tab to
take readings or perform a velocity calibration.
•Press [F2] (Cancel) to return to Operate Mode without
confirming the sound speed value.
•Press [F3] (OK) to confirm the new value. The PT878GC
returns to Operate Mode.