Panametrics MG2, User Manual, Page: 25 / 138

March 2006 910-257C
MG2 Series Page 3-7
3.5 Zero Calibration
To do the Zero Calibration, a calibration block of the material to be
measured must be used. The block should be approximately as thin as
the thinnest section to be measured. If the surface of the material to be
inspected is rough, the surface of the calibration block may be
roughened to simulate the actual surface to be measured. Rough
surfaces generally reduce the accuracy of measurements but
simulating actual surface conditions on the calibration block can help
to improve results. The exact thickness of the sample must be known.
Step 1: First update the Transducer Zero Compensation by wiping
the transducer face clean of all couplant and pressing [2
nd
F],
[CAL ZERO](Do Zero) while in the Measure mode.
Step 2: Couple the transducer to the standard.
Step 3: Press the [CAL ZERO] key.
Step 4: When the thickness reading is stable, press the [ENTER]
key. The [ENTER] key will not be accepted if the LOS
display flag is on.
Step 5: Uncouple the transducer and use the [
, ,
, and ]
slewing key to enter the thickness of the standard.