GE PT878 user manual Taking Wave Samples for Diagnosis, Applying a Stored Signal for Diagnosis

Chapter 8. Servicing the PT878

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.

192 Transport® Model PT878 Portable Liquid Flowmeter User’s Manual