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INTRODUCTION:
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. Through the use of
high
speed digital signal processing and automated diagnostics, the MINI-MAX minimizes
the requirement
for extensive operator training. With built in data recordation and reporting
through an RS232 interface, the MNI-MAX offers an easy to use and reliable
solution
to the most difficult bolting problem.
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KEY
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 quanities - Time (nanoseconds), Elongation,
Load, Stress, and %Strain.
Display
Options - RF, Rectified, Large Digits with Limits Bar.
Display Resolution - 1/8" VGA 240 x 160 pixels.
Stores 8000 readings and waveforms in multiple groups.
Built-in Linear regression or vector for optimizing load
measurements.
The Auto Set feature automatically optimizes detection and adjusts display.
Hi/Lo alarm tolerance limits work in conjunction with the data port and external
pump shut-off device.
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Physical
Size:
Width (2.5in/63.5 mm)
Height (6.5 in/165 mm)
Depth (1.24 in/31.5 mm)
Weight:
13.5 ounces (with batteries).
Keyboard:
Membrane switch pad with
twelve tactile keys.
Operating Temperature:
14 to 140F (-10C to 60C)
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 x 160
pixels). Viewable area 2.4 x 1.8in (62 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
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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 5 min.
Battery status icon.
Measuring
Range: From 1” to 48” (25.4mm to 122cm) bolts.
Time - Nanoseconds.
Elongation - Change in length (inches/millimeters).
Load - Force load applied (pounds kIP or kN Killonewtons).
Stress - Force for unit area stress applied (pounds kPSI or megapascals
MPa).
Strain % - percentage strain applied (inches per inch or millimeters
per millimeter)
Resolution:
+/- .00001 inches (0.0001 mm)
Velocity Range:
.0492 to .3936 in/ms
1250 to 9999 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.
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Repeatability Bar
Graph - Bar
graph indicates stability of measurement.
Data Logger (Internal)
Total of 8,000 readings, multiple bolt groups. Stores both waveform
views, nanoseconds, elongation, load, stress, and strain for each
reading.
Memory:
16 megabit non-volatile ram.
Transducer
Transducer Types:
Single Element (1 to 10 MHz & 1/8” to 1” diameters).
Locking quick disconnect
“00” LEMO connectors.
Standard 10 foot cable.
Custom transducers and cable lengths available on request.
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.
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| Note: The
MINI-MAX is backed by a 2 warranty. |
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Click on the photo above for a larger image.
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