910-257C March 2006
Page 3-6 MG2 Series
If the gage double beeps before returning to the Measure mode, then
an error has been made in the calibration procedure and the velocity
has not been changed. The most likely problem is that the thickness
value entered was not correct.
[2
nd
F], [CAL VEL](Vel) may be pressed following Velocity
Calibration (or at any time from the Measure mode) in order to read
and record the material velocity for this particular material. This
velocity may be entered by means of the slewing keys in the future
when measuring this material, without using the block.
Note: Sound velocity in all materials changes with tempera-
ture. For maximum accuracy the calibration block
should be at approximately the same temperature as the
samples to be measured.
3.4.2 When Material Sound Velocity Is
Known
When preparing to measure a different material, of known sound
velocity, the velocity may be entered directly without doing the CAL
VEL procedure discussed above.
Step 1: From the Measure mode press [2
nd
F], [CAL VEL](Vel).
The current velocity will be displayed.
Step 2: This number may then be changed to the desired value using
the [
, , , and ] slewing keys.
Step 3: Press [MEAS] to complete the entry and return to the
Measure mode. If the gage is turned off before the [MEAS]
key is pressed, the velocity will not be updated to the new
value, but instead will retain the previous value.
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