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Chapter 8. Servicing the PT878
192 Transport® Model PT878 Portable Liquid Flowmeter User’s Manual
8.10.4 Setting Impulse Response (cont.)
2. The second prompt asks for the percent of gain.
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the desired percentage.
c. Press [ENTER] to confirm your entry.
You have completed entering data for the Impulse Response option.
• Press [F1] to start transmitting in the chosen direction.
• Press [F2] to stop transmitting.
• Press [F3] to leave the option and return to Operate Mode.
8.10.5 Taking Wave Samples for Diagnosis
The Wave Snapshot option allows you to capture receive signals to a file
that you can send to a PC for diagnostic purposes. To use this option, scroll
down to the Wave Snapshot entry in the Service Menu and press
[ENTER].
The PT878 then captures three pairs of upstream and downstream raw
signals to a file named Wave01.met. (If you repeat the captures, the
successive files will be named Wave02.met, Wave03.met, etc.) You can
then transfer the files over the IR port to a PC for analysis by a service
engineer.
Note: Refer to page 104 for information on transferring a file to a PC.
8.10.6 Applying a Stored Signal for Diagnosis
The Simulate option places the PT878 in a mode in which it uses a stored
signal (instead of the live signal from the transducers) to make flow
calculations for diagnostic purposes. On the PC, you must rename a
Wavexx.met file as Wave.met and send it back to the PT878 over the IR
link. Then, on the PT878, scroll down to the Simulate entry in the Service
Menu and press
[ENTER]. The PT878 then applies the simulated signal.
Note: Refer to page 105 for information on transferring a file from a PC to
the PT878.