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Dakota Ultrasonics supply a wide variety of Ultrasonic Industrial ultrasonic testing equipment.


MINI-MAX - Ultrasonic Bolt Tension Monitor

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.

The MINI-MAX includes these features:

  • The FIRST cost-effective ultrasonic
    solution available on the market.
  • EFFECTIVELY monitor your bolts
    during periodic shutdowns over
    the service life of the fastener.
  • VISUALLY compare the unloaded
    to the loaded waveform.
  • MEASUREMENT QUANTITIES
    Time (nanoseconds), Elongation,
    Load, Stress, and %Strain.
  • DISPLAY OPTIONS-RF, Rectified,
    Large Digits with Limits Bar.
  • DISPLAY RESOLUTION
    1/8 in. VGA 240 pixels x 160 pixels.
  • STORES 8000 readings and
    waveforms in multiple groups.
  • BUILT-IN linear regression or vector
    for optimizing load measurements.
  • AUTO SET feature automatically opti-mizes
    detection and adjusts display.
  • HI/LO ALARM tolerance limits work in
    conjunction with the data port and
    external pump shut-off device
MINI-MAX Specifications
Physical
Size: Width (2.5in./63.5mm.)
Height (6.5in./165mm.)
Depth (1.24in./31.5mm.)
Weight: 13.5 ounces (with batteries).
Display: Membrane switchpad with twelve tactile keys.
Operating Temprature: 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:

1/8in. VGA grayscale display (240 pixels x 160 pixels).
Viewable area 2.4in. x 1.8in. (62mm. x 45.7mm.)
EL backlit (on/off/auto).

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
Warranty:
2 year limited.
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.

Measuring
Range: From 1 in. to 48in.
Time: Nanoseconds.
Elongation: Change in 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 / Farenheit & 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.

Limits Bar :

(alarm limits)- Set Hi & Lo alarm limits for displaying an acceptable tolerance range.
Repeatability Bar Graph: Bar Graph-Bar graph indicates stability of measurement.
Data Logger
Memory: 16 megabit non-volatile ram.
Transducer
Transducer Type :

Single element (1 MHz to 10 MHz & 1/8in. to 1 in. diameters).

Locking quick disconnect "00" LEMO connectors.

Standard 10 foot cable.

Custom transducers available for special applications.

Temperature probe for automatic temperature compensation.

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.
Certification: Factory calibration traceable to national standards.

Prepaid wire transfer required for all international orders
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Tel: (713) 943-2721 e-mail: sales@deterco.com