| The
USM-I and USM II, Ultrasonic Stress Meters, define the state of the art
in the measurement of the actual clamp load produced by tightening a
threaded fastener. The USM's can measure this load, or the
resulting fastener elongation, very accurately in fasteners of virtually
any material from 1/2 inch to 20 feet in length.
Choose from the
bench mounted line power version (USM-I), or the new hand held USM-II,
which allows up to 30 hours field operation from 4 'C' cells.
The
measurement is achieved by determining the change in the transit time,
of an ultrasonic shock wave along the length of the fastener as the
fastener is tightened by any method. The on-board microcomputer
automatically interprets this time measurement to display the load,
tensile stress, or elongation resulting in the fastener. Through
the use of high speed digital signal processing and automated
diagnostics the USM minimizes the requirements for extensive operator
training.
|
|
