Dakota Ultrasonics DFX-8 plus MANUAL2 - Manual (Page 20)

Dakota Ultrasonics
16
6) Use the UP and DOWN arrow keys on the left button wheel to scroll
through the sub menu items until ZERO COATING is highlighted.
7) Press the ENTER key to display the confirmation screen.
8) Press the OK key to zero the coating and return to the PRB menu, or ESC
to cancel the coating zero process.
9) Press the MULTI MODE key once to activate the measurement mode
options.
10) Use the UP and DOWN arrow keys on the left button wheel to scroll
through the sub menu items until Coating On (PECT) is highlighted.
11) Press the ENTER key to select the measurement mode and return to the
measurement screen, and begin taking readings.
2.8 Coating Calibration
The DFX-8 has been preset to a default coating velocity of 0.0850 in/µsec (2159
m/sec). This will be very close to the most common coating material velocities used
in the field. If the velocity of the coating is known, and different than the above
default setting, the user can simply enter the coating velocity into the DFX-8.
However, if the velocity is unknown, the DFX-8 can also be calibrated to a specific
coating sample/type using the 1pt calibration option in PECT (pulse-echo coating)
mode, or a two point calibration is CT (coating only) mode. For the purpose of this
quick start section only the 1pt option PECT (pulse-echo coating) mode will be
covered. Refer to the calibration section of the manual for a complete explanation on
the coating calibration options. The following steps below outline the necessary
steps to either set the velocity of the coating, or perform a one point calibration to
calculate the coating velocity: