DMTA-10022-01EN, Rev. C, January 2015
Chapter 5
60
5.2.5 Entering a Known Material Sound Velocity
When preparing to measure thicknesses on parts made of a different material, if you
know the sound velocity for the material, you can enter it directly without performing
a material sound velocity calibration procedure.
To enter a known material sound velocity
1. In the measurement screen, press [2nd F], [CAL VEL] (VEL).
2. In the VELOCITY screen (see Figure 5-9 on page 60), use the arrow keys to edit
the velocity to the known value.
Figure 5-9 Entering a known material sound velocity
3. Press [MEAS] to return to the measurement screen.
5.2.6 Locked Calibrations
The 45MG includes a password-protected locking function to prevent changes to
setups, and prevent access to certain functions. A change to the calibration is one
action that can be locked. In such case, the message shown in Figure 5-10 on page 61
appears momentarily on the help text bar (see “Locking the Instrument” on page 136
for details).
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