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Servicing the PT878GC 9-13
April 2004
Calibrating the Thickness Gauge Transducer (cont.)
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the length.
c. Press
[ENTER] to confirm the entry.
4. Press
[ENTER] (Calibrate button) to prepare for calibration.
Then apply couplant B to the block surface, and hold the
transducer against the block.
5. When you have the transducer firmly pressed against the
block, press [ENTER] (Ready button) again to perform the
calibration.
6. Hold the transducer steady until the Set button appears. Press
[ENTER] to store the calibration.
IMPORTANT: Be sure to hold the transducer steady until the
GE Panametrics wait cursor disappears.
7. If you have chosen dual calibration, repeat Steps 3 through 6
above for Block 2.
8. The PT878GC asks for confirmation of the calculated and
current values.
• Press the [S] arrow key to move to the Retry box and press
[ENTER] to recalculate the value, or
• Press [ENTER] on “Set” to commit the calculated value.
Once you have completed calibration, the transducer should
remain calibrated until the meter memory is cleared or a dramatic
shift in ambient conditions occurs.
To leave the Zero window:
• Press the [W ] or [X] arrow key to move to another tab to
take readings or perform a velocity calibration.
• Press [F2] (Cancel) to return to Operate Mode without
confirming the sound speed value.
• Press [F3] (OK) to confirm the new value. The PT878GC
returns to Operate Mode.