GE PT878 user manual Display Graph, Zero Material, Set

Chapter 8. Servicing the PT878

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

2.To enter the block length (here, the thickness of the sample as measured with a caliper or calibrated sample), press the [T] arrow key and then press [ENTER] to open the Block Length text box. Use the numeric keys to enter the desired block length. Press [ENTER] to confirm the entry.

3.Prepare the sample for calibration by applying couplant B to its surface, and press [ENTER]. The screen now appears similar to Figure 114 below.

4.Hold the transducer steady against the sample, and wait for the Set button to appear.

5.To calibrate the gauge, press the [T] arrow key to move to the Set button.

6.Press [ENTER] (Set button) to start the calibration sequence.

Thickness Gauge Measure

Display Graph	Velocity	Zero Material
Block Length
	1	Set

Press Set to Commit Value

Calculated 22129. Current 74733.

Cancel

OK

Figure 114: Velocity Window - Calculated and Current Values

Transport® Model PT878 Portable Liquid Flowmeter User’s Manual 169