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Chapter 8. Servicing the PT878

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

8.4.5 Calculating Velocity (Pipe Material Soundspeed) (cont.)

7. The “Calculated” box shows the thickness value measured. The PT878

asks for confirmation of the calculated and current values. Press

[ENTER] to commit the calculated value, or to recalculate the value.

Note: If you commit the calculated value, the settings in the Material

window also change from the previous material to “Other” with the

new soundspeed.

To leave the Velocity window:

• Press the [W] or [X] arrow key to move to another tab.

• Press [F2] (Cancel) to return to Operate Mode without confirming the

soundspeed value.

• Press [F3] (OK) to confirm the new value and return to Operate

Mode.

8.5 Programming the Thickness Gauge

While the T-Gauge Display option allows you to program the appropriate

material and soundspeed, the Thickness Gauge Setup option enables you to

view or change five parameters:

• Low Signal Threshold

• Transducer Delay

• Signal Inversion

• Noise Threshold

• Detection Threshold

Note: The thickness gauge programming settings are entered at the factory.

You should not change them unless instructed by the factory.

The Programming window appears similar to Figure 115 on page 171.

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GE PT878 Manual do Utilizador Página 186