GE PT878GC Manual De Usuario

April 2004

Calculating Velocity (Pipe Material Sound Speed) 
(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 measured 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 9-11 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. 

Display

Cancel

OK

Velocity

Graph

Zero

Material

Block Length

Calculated

Current

1

Press Set to Commit Value

Set

22129.

74733.