Calibrating The Thickness Gauge Transducer - GE TransPort PT878GC User Manual

April 2009

Calibrating the Thickness Gauge Transducer

To zero the transducer offsets, go to the Zero tab. Press the [ ] or
[ ] arrow key until you reach the Zero tab and press
screen appears similar to Figure 9-9 below.
Display
Block 1 Length
Calculated
1. Press the [
2. The first prompt asks you to choose between single and dual-
point calibration. Use the [ ] and [ ] arrow keys to move to
the appropriate radio button and press
Note: GE Sensing recommends dual calibration. Dual-point
calibration is more reliable, but it requires two known
thicknesses of the calibration material.Use single-point
calibration only if you know the sound speed in the
calibration block material to a high degree of accuracy.
See Appendix C for more information.
3. The next prompt asks you to enter the length of Block 1. (If
you are using a GE Sensing-supplied test block, the length is
printed on the block.) Press
9-12
Thickness Gauge Measure
Graph
Velocity
Dual Calibration
Single
Transducer Delay,
0
Cancel
Figure 9-9: The Zero Window
] arrow key to enter the window.
[ENTER]
Zero Material
0 mm Calibrate
µs
Current
[ENTER]
.
to open the text box.
Servicing the PT878GC
[ENTER]
. The
0
OK