Dakota Ultrasonics PX-7 - Manual (Page 21)

PX-7 Ultrasonic Thickness Gauge
17
PX-7 Modes
Scan Mode
While the PX-7 excels at making single point measurements, it is
sometimes desirable to examine a larger region, searching for the thinnest
point. The PX-7 includes a feature, called Scan Mode, which allows it to do
just that.
In normal operation, the PX-7 performs and displays four
measurements every second, which is quite adequate for single
measurements. In Scan Mode, however, the tool performs eight
measurements every second, but does not display them. While the
transducer is in contact with the material being measured, the PX-7 is
keeping track of the lowest measurement it finds. The transducer may be
"scrubbed" across a surface, and any brief interruptions in the signal will be
ignored. When the transducer loses contact with the surface for more than
a second, the PX-7 will display the smallest measurement it found.
When the PX-7 is not in calibration mode, press the SCAN key to turn
Scan Mode on and off. A brief message will appear in the display
confirming the operation. While scanning, the display will show a moving
series of dashes instead of a thickness value. When the transducer is
removed from the material being scanned, the PX-7 will (after a brief
pause) display the smallest measurement it found.