Dakota Ultrasonics VX - Manual (Page 11)

VX Ultrasonic Velocity Gauge
7
When the IN symbol is on, the VX is displaying a thickness value in
inches. The maximum thickness that can be displayed is 19.999 inches.
When the MM symbol is on, the VX is displaying a thickness value in
millimeters. If the displayed thickness exceeds 199.99 millimeters, the
decimal point will shift automatically to the right, allowing values up to
1999.9 millimeters to be displayed.
When the IN symbol is on, in conjunction with the /
µs symbol, the VX is
displaying a sound-velocity value in inches-per-microsecond.
When the M symbol is on, in conjunction with the /s symbol, the VX is
displaying a sound-velocity value in meters-per-second.