Dakota NDT BT2-DL (Formerly Max II)

Dakota NDT BT2-DL (Formerly Max II)

Accurately Measures Fasteners Up to 100 ft. in Length

Overview

The BT2-DL (Formerly Max II) Ultrasonic Bolt Tension Monitor is the latest gauge addition to Dakota's bolting products. It incorporates all of the great features of the BT1-DL (Formerly MiniMax) unit, with some added benefits in terms of features, hardware, speed, and length. BT1-DL accurately measures fasteners up to 100 feet in length, and sports Dakota's best overall performance and power. Using a variety of processing and automation, the BT1-DL reduces operator error. With built in data recordation and supporting DakView utility software for PC and Mac, the BT2-DL offers an easy to use and reliable solution to accommodate the most difficult bolting applications.

Features

  • Measurement Quantities: Elongation, Load, Stress, %Strain and Time (nanoseconds)
  • Sunlight readable color QVGA display (320×240 pixels)
  • Measure Modes: Pulse-Echo, Echo-Echo, Echo-Echo-Verify (triple echo)
  • Auto Correlation: optimize transducer placement
  • Custom user calibration feature
  • 4GB internal SD & up to 64GB external SD slot memory
  • USB 1.1 connectivity
  • Analog, serial and alarm outputs
  • PC interface reporting software
  • Import & export files – between Max II and MiniMax
  • Li-Ion pack & 6 AA - emergency battery backup option
  • 2 Year Warranty

Bolt Testing Kit Selection Criteria

1)  Probe Selection:

  • Frequency
    2.25 MHz is food for flange situations
    5 MHz is good for general structure
    10 MHz is good for small diameters

  • Diameter

    Select largest diameter that will fit the bolt end while remaining in complete contact
    For 1/2" to 1 1/4" Diameter Bolt, use 3/8" or 1/2” Diameter Probe
    For 1/8" or 1/4" (with head) Diameter Bolt, use 1/8" Diameter Probe

*Transducers are not included and need to be purchased separately

  • Magnetic or Non-Magnetic
    Magnetic probes are recommended for testing steel bolts
    Constant and repeatable contact with part
    Hands-free inspection
     
  • Glue-On Single Contact Crystals

    In cases where it is difficult to place/mount a standard transducer; the Glue-On Single Contact Crystals are a good option. Glue-on transducers also ensure correct transducer placement. For use on fasteners with limited elongation.

Magnetic Single Element Contact Transducers

2) Application Questions:

  • What material types are you testing?
  • What are the minimum and maximum diameters and lengths of bolts?
  • What type of bolt? Stud or bolt with head?
  • Do you plan on measuring the same bolt over the service life of the bolt (measuring periodically, more than once)?
  • Are there any raised grade markings on the heads of the bolts? If yes, they need to be ground flat or contact us to further discuss a custom transducer.
  • Do you expect to experience any bending in the joint your fastening? This can commonly occur in flange joints. 2.25MHz is better for flange situation - more forgiving of the bending.

3) Calibration Bar Set

Used for monitoring the bolts over the service life. Not required if not monitoring bolts over service life or using more than one gauge.

4) Temperature Sensor

Required if measuring results at different temperatures. 

 

*See following link for a full list of probe options: Transducer List

*Contact us Here for further review if you are not sure with transducer is right for you

Non-Magnetic Single Element Contact Transducers

Technical Specifications

BT2-DL Specifications

Physical Attributes
Weight 4.5 lbs. (2.04 kg) with batteries
Size (WxHxD) 8.5" x 6.5" x 2.5" (216 x 165 x 70 mm)
Operating Temperature 14 - 140 °F  (-10 - 60 °C)
Keyboard Membrane switch with 21 tactile keys
Case Extruded aluminum body with nickel plated aluminum end caps (gasket sealed)
Display Views RF (full wave view), ± Rectified (half wave view), Digits or split screen combination (wave plus large digits)
Environmental Meets IP65 requirements
Connections
USB Direct USB 1.1 PC connectivity
Power Connector 12V @ 2amps, adapter 100-240VAC, .7 Amps, 50-60Hz 5 Pin Lemo (includes): RS232 PC serial interface
Alarm Outputs Two independent alarm outputs triggered by the gates
Analog Out Proportional outputs (amplitude or distance), 0-10 volts
Transducer Connectors Two Lemo 00 connectors
Memory
Log Formats Grid (Alpha Numeric)
Capacity 4GB internal & up to 64 GB external SD slot
Screen Capture Tagged interface file (.tif) capture for quick documentation
Custom Setups 64 user configurations
Power Source
Lithium Ion Pack 10.8V, 2 amp hrs, typical operation 18hrs
Battery Backup Emergency battery backup. Six 1.5V alkaline, 1.2V AA Nicad cells, 1.2V AA NiMH or other equivalent power sources
Battery Life (Continuous Use) Alkaline (12 hrs.), Nicad (5 hrs.) and NiMH (12 hrs.) with default settings
Electronics
Display Blanview sunlight readable QVGA TFT color display (320 x 240 pixels)
Viewable Area 4.54" x 3.40" (115.2 x 86.4 mm) or 5.7" (144.78 mm) diagonal. 16 bit color palette, multiple color options and variable brightness
Screen Refresh Rate 60Hz
Timing Precision TCXO timing with single shot 100MHz 8 bit ultra low power digitizer
Pulser Types Spike, Square Wave & Tone Burst. Pulser Voltage: 100 - 400V
Pulse Width Selectable step options Spike, Thin, Wide, HV Spike, HV Thin, HV Wide. TB .5MHz, TB 1MHz, TB 20MHz, TB 5MHz, TB 10MHz. Spike 40 ns. Square Wave 80 to 400 ns, Tone Burst 50 ns to 1 nanosecond
Gain 0 to 110dB with 0.2dB resolution. Manual and AGC control
Damping 50, 75, 100, 300, 600 & 1500 ohms
Frequency Band Broadband 1.8 - 19 MHz (-3dB) filter
Horizontal Linearity ± 0.4% FSW
Vertical Linearity ± 1% FSH
Amplifier Linearity ± 1dB
Amplitude Measurement 0 to 100% FSH with 1% resolution
Delay 0 - 999.999 in. (25,400 mm) at steel velocity
Measurement Gates Three independent gates depending on measurement mode selected with audible and visual alarms. Amplitude: 5-95%, 1% steps
Measuring
Units English (in), Metric (mm) or Time (µs)
Velocity 0.0492 to .5510 in/µs (1250-13995 m/s)
Measurement Modes Pulse-Echo (P-E), Echo-Echo (E-E) or Echo-Echo-Echo (E-EV)
Measurement Range 1 to 999.999 in. (2540 cm) in pulse-echo (P-E) measurement mode. Range will vary using multi-echo modes - dependent on material type and consistency
Detection Zero Crossing
Resolution ± 0.00001" (0.0001 mm)
Calibration Automatic, Fixed, Single or Two-Point zero calibration options
Quantities Time - Nanosecond Elongation - Change in length (in. / mm). Load - Force load applied (pounds KIP or megapascals MPa). Stress - Force for unit area stress applied (inches per inch or millimeters per millimeter). %Strain - Ratio of elongation to effective length
Bolt Materials Select types from a preset or custom list
Transducers
Transducer Types Single element - 1 MHz to 10 MHz frequencies and 1/8" to 1" diameters. Magnetic and non-magnetic options available
Glue On Available for short bolts with minimal / short elongations to eliminate transducer placement errors
Connectors Microdot, Lemo 00 or BNC options depending on the transducer model selected
Custom Transducers Available for special applications
Features
Setups 64 custom user defined setups. Factory setups can also be edited by the user
Auto Set Automates the detection, scope and display setting process for each individual bolt
Gates Three measurement gates, depending on measurement mode used with adjustable start and threshold
Alarm Limits Adjustable Hi/Lo tolerances with visual LEDs and audible beeper. Hardware alarm outputs (accessory cable required)
Field Calibration Vector or Regression correction curve for increased accuracy using Load & Stress

Kit Includes

BT2-DL Kit Includes

  • Unit
  • 3 AA Batteries
  • 4 oz. Bottle of Couplant
  • RS232 Transfer Cable Lemo to DB9
  • USB converter cable to DB9
  • 10' Lemo to Microdot Transducer Cable
  • PC Utility Software
  • Carrying Case
  • Operation Manual
  • Certification

*Temperature Connector is included only with the purchase of a temperature sensor (A-156-8001)

Includes 2 Year Warranty

Product Literature

Description Part # Saved Price Select Option Add to
Dakota NDT BT2-DL Kit Includes: Unit, Lithium Pack, Couplant, USB Type A to Type B Transfer Cable, Carrying Case, 10' Lemo 00 to Microdot Transducer cable, PC Utility Software (download), Operation Manual & Certification.(Formerly Max II) UT-DU-Z-197-0002
$5,375.00
Dakota NDT Magnetic Single Element Transducer, 5 MHz, 1/4", Microdot, Top Mounted, T-702-2405 UT-DU-T-702-2405
$815.00
Dakota NDT Contact Transducer with Microdot Connectors, 1/2" Diameter, 2.25 MHz (specify top or side entry)
Model #
UT-DU-T-5043-1855-Master
$375.00
Dakota NDT Temperature Sensor w/ 6' Cable for BT1-DL & BT2-DL (MINI-MAX & MAX II) UT-DU-A-156-8001
$570.00
Dakota NDT 3" & 6" Steel Calibration Bars - 4140 Steel UT-DU-X-000-0010
$625.00