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Chapter 8. Servicing the PT878
8.4.3 Displaying the Receive Signal in Graphical Format
Used chiefly for diagnostic purposes, the Graph option helps to determine
why the thickness gauge is not working if you suspect a problem. The graph
shows an image of the acoustic signal. If the display does not show a signal
image similar to Figure 110 below, you may have a problem with the
transducer, couplant, or the programmed values. Also, some materials (such
as PTFE or fiberglass) do not support acoustic signals.
To open the Graph window and display the receive signal graphically, press
the [W] or [X] arrow key until you reach the Graph tab and press [ENTER].
The screen appears similar to Figure 110 below.
Thickness Gauge Measure
Display
Graph
Velocity
Zero
Material
Signal
Cancel
OK
Figure 110: Thickness Gauge Graph Window
Press [F2] (Cancel) or [F3] (OK) to return to Operate Mode, or press the [X]
arrow key to move to another window in the option. However, if you wish
to adjust the graph, press the [T] key. The screen now appears similar to
Figure 111 on page 164.
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual
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