Model USM-3 -Ultrasonic Stress Meter

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 elongation or load in the fastener. Through the use of high speed digital signal processing and automated diagnostics, the USM-3 minimizes the requirements for extensive operator training.

• Weight: 2.25 Kg (4.95 lb) with batteries.
• Resolution: 0.00001 inch (0.0001 mm).
• Dimensions: 7-1/16″ high x 9-7/16″ wide x 2-1/16″ deep (180 mm high x 239 mm wide x 53 mm deep)

• Large 1/4 VGA back lit display is easily visible from a distance and in poor light.
• Can store up to 4000 bolts, 20,000 elongation and load readings.
• Rugged steel and aluminium case designed for production, field and construction environments.
• USM 3 is supplied in a rugged water tight (Pelican) case complete with AC adaptor, nylon carrying case, 10′ (approx.3m) transducer cable, RS232 data transfer cable, 4 oz bottle of couplant, batteries and operators handbook.
• Measures fasteners of virtually any material from 1/2 inch (12mm) to over 50 feet (15m) in length.
• 0 – 10V analogue output for control of tightening tools such as a Norbar Pneutorque multiplier.
• Fast update speeds.
• Measurement modes of pitch-catch and pulse-echo.
• Unit can be operated with mains power supply (96 to 264 Vots) 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.