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Chapter 8. Servicing the PT878
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual 169
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.
Figure 114: Velocity Window - Calculated and Current Values
Display
Thickness Gauge Measure
Cancel OK
Velocity
Graph Zero
Material
Block Length
Calculated
Current
1
Press Set to Commit Value
Set
22129. 74733.