711 S. Creek Road West Chester, PA 19382-8013
(610) 793-1700 FAX (610) 793-1702

info@ndtint.com

MINI-MAX

The MINI-MAX Ultrasonic Bolt Tension Monitor, defines the state of the art in the measurement of the actual elongation produced by tightening a threaded fastener.

The MINI-MAX can measure the elongation very accurately in fasteners of virtually any material from 1/2 inch to 4 feet in length.  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 time(nanoseconds), elongation, load, stress, or %strain from stretching a fastener.

                         

 MINI-MAX SPECIFICATIONS

Click MINI-MAX for .pdf document

Features
Setups:   64 custom user defined setups. Factory setups can also be edited by the user
Gate:  Gate used to fine adjust where the detection point occurs
Alarm Limits:  Set Hi and Lo tolerances with audible beeper, viewable scan bar, and visual LEDs
Auto Set:  Locates the detection signal, optimizes the gain setting, and adjusts the overall display to show the waveform and detection point automatically
Field Calibration:  Vector & linear regression

Ultrasonic Specifications
Measurement Modes:  Pulse-Echo (standard)  Pulse-Echo w/Gate (fine adjust)
Pulser:   Square wave pulser with adjustable pulse width (spike, thin, wide).
Receiver:  Manual or Auto Set gain control with 40dB range.
Timing:  10-bit 250 MHz digitizer.

Measuring
Range: From 1 in. to 48in. bolts (2.54mm. to 122mm.)
Time - Nanoseconds
Elongation - Change to length (inches/millimeters)
Load - Force load applied (pounds kPSI or megapascals MPa)
Stress - Force for unit area stress applied (inches per inch or millimeters per millimeter)
Resolution: +/- 0.00001 in. (0.0001 mm.)
Velocity Range: 0.0492 to .3937 in/ms (1250 to 9,999 meters/sec)
Fixed, Single, and Two-point zero calibration options
Select bolt material types from a preset or custom list
Units: English & Metric / Fahrenheit & Centigrade

Display
A-Scan - Rectified +/- (half wave view) or RF (full waveform view)
Large Digits - Display and toggle between nanoseconds, elongation, load, stress, and strain
Digit Height: 0.400 in. (10mm.)
Limits Bar (alarm limits) - Set Hi & Lo alarm limits for displaying an acceptable tolerance range
Repeatability Bar Graph - Bar graph indicates stability of measurement

Physical
Size:   Width (2.5 in/63.5 mm.)  Height (6.5 in/165 mm.)  Depth (1.24 in/31.5 mm.)
Weight:  13.5 ounces (with batteries).
Display:  Membrane switchpad with twelve tactile keys.
Operating Temperature:  14°F to 140°F (-10°C to 60°C).
Case:  Extruded aluminum body with nickel-plated aluminum end caps (gasket sealed).
Data Output:  Bi-directional RS232 serial port.  Windows® PC interface software.
Display:  1/8 in. VGA grayscale display (240 pixels x 160 pixels).
Viewable area 2.4in. x 1.8in. (62mm. x 45.7mm.) EL backlit (on/off/auto).

Data Logger (Internal)
Total of 8,000 readings in multiple bolt groups. Stores both waveform views, nanoseconds, elongation, load, stress and strain for each reading
Memory: 16-megabit non-volatile ram

Transducer
Single element (1 MHz to 10 MHz and 1/8" to 3/4" diameters)
Locking quick disconnect "00" LEMO connectors
Standard 10-foot cable
Standard contact or magnetic mount housings
Custom transducers available for special applications
Temperature probe for automatic temperature compensation

Power Source
Three 1.5V alkaline or 1.2V NiCad AA cells
Typically operates for 150 hours on alkaline and 100 hours on NiCad (charger not included)
Auto power off if idle for 5 min
Battery status icon

Warranty  2 year limited

Certification
Factory calibration traceable to national standards

info@ndtint.com



Updated July 24, 2009