TECHNICAL SPECIFICATIONS
Weight: 2.25 Kg (4.95 lb) with batteries.
Dimensions: 180 mm high x 239 mm wide x 53 mm deep.
Accuracy of Elongation:: +/-0.0003 in (+/-0.008 mm) or 0.001% of reading if greater.
FEATURES
Resolution: 5 digit
Large 1/4 VGA back lit display is easily visible from a distance and in poor light.
Can store up to 2000 measurements.
Rugged steel and aluminium case designed for production and site environments.
USM 3 is supplied in a rugged water tight (Pelican(R)) case complete with AC adaptor, nylon carrying case, 6' transducer cable, RS232 data
transfer cable, 4 oz bottle of couplant and operation handbook.
Measures fasteners of virtually any material from 1/2 inch (12mm) to over 50 feet (17m) in length.
0 - 10V analogue output for control of tightening tools such as a Norbar Pneutorque multiplier.
Measurement modes of pitch-catch and pulse-echo.
Unit can be operated with mains power supply or via 4 'C' cell batteries.
Sealed membrane keypad with tactile keys.
Works with magnetic and glue on transducers from 1 MHz to 10 MHz
 

In certain critical bolting applications, factors such as friction or bolt/joint geometry are such that the measurement of applied torque alone will not provide the degree of accuracy necessary to control the preload to be monitored over the service life of the fastener. In these applications, ultrasonic measurement of fastener elongation and/or load has frequently proven to be the most accurate, reliable and cost effective solution.

Ultrasonic measurement of bolt preload is made possible by introducing a sonic pulse at one end of the fastener and accurately measuring the time of flight (TOF) required for the echo to return from the opposite end. Using material constants, the USM-3 converts this TOF into an "ultrasonic length" of the fastener, providing a baseline from which future measurements will be made. When the fastener is tightened, the TOF increases and the USM-3 will again utilise material constants to eliminate the effects of stress and temperature variations on sound velocity, providing an accurate elongation or load measurement.

The USM-3 uses state of the art hardware and software to achieve these measurements with maximum automation, and minimizes the need for operator interpretation. Offering digital recording and transmission of data, in addition to analog signal output the USM-3 provides a complete system for measurement, recording, and control of fastener tension in the most demanding applications.

VIET HAN EQUIPMENT

Hotline : 090901 9838

Email : viethan@viethanco.vn