Dakota BT Bolt Tension Monitor
The Dakota BT Bolt Tension Monitor uses ultrasound to precisely measure fastener elongation, time (nanoseconds), load, stress & %strain.
- Summary
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Summary
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When nuts and bolts are fastened together under load the action of tightening the nut increases the force applied to the bolt causing elongation.
By using ultrasonics, bolt tension monitors are not affected by temperature, friction or resistance factors affecting the accuracy of standard torque measurement techniques - giving the Dakota BT1-DL Bolt Tension Monitor accuracy within 0.0001mm (0.00001 inch).
Using the gauge's USB interface together with the optional shut off accessory the gauge can be programmed to automatically stop the tightening process when the appropriate load has been applied.
Features:
- Range of display & measurement options including: Elongation, Load, Stress, and %Strain, RF, Rectified, Large Digits with Limits Bar
- Temperature compensation to counteract measurement irregularity caused by temperature change
- Data storage capability: 4GB internal memory
- Auto Set feature automatically optimizes detection and adjusts display
- Hi/Lo Alarm tolerance limits work in conjunction with the data port
Transducers Options
A wide range of Single Element Contact Transducers available
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- Key Features
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Key Features
Dakota BT Bolt Tension Monitor
Applications
Wind Turbines
Automotive Frames
Bridge Structures
Theme Parks
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- Product Features
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Product FeaturesDakota BT Bolt Tension Monitor
Model BT1-DL Display Mode Material thickness digits display A-Scan Rectified +/- (half wave view), or RF (full waveform view)Measurement Range PE - 25.4 - 25,400mm (1 - 999”)Resolution 0.001mm (0.0001”) or 0.0001mm (0.00001”) switchableMeasurement Rate Manual 8 readings per secondVelocity Calibration Range 1250 - 13,995m/s (0.0492 - 0.5510 in/μs)Temperature Compensation Limit Alarm Mode Memory and Data Logging 4GB internal memory
Sequential and grid batching
Bitmap graphic capture and capture viewerCalibration Options Automatic, fixed, single and two-pointTransducer Probe Type Single elementTransducer Frequency Range 1 - 10MHzDisplay 1/8” VGA greyscale display (240 x 160 pixels)
Viewable area 62 x 45.7mm (2.4 x 1.8”)Units (Selectable) in/mm, μs, °F/°CLED Backlight On / Off/ AutoRepeatability / Stability Indicator Low Battery Indicator Battery Save Mode AutoTransducer Connector Type Microdot, Lemo and BNCUSB-C Interface Temperature Sensor 5 pin LEMO 1Screen Refresh Rate 30 HzTiming Precision TCXO timing with single shot 100 MHz 8 bit ultra-low power digitizerPulser Type Square Wave. Selectable 100, 150 and 200 volts. Selectable options Spike, Thin, and Wide. 80 to 400nsDamping 50, 75, 100, 300, 600, & 1500ohmsFrequency Band Broadband 1.8 - 19 MHz (-3dB) filterHorizontal Linearity +/- 0.4% FSWVertical Linearity +/- 1% FSHAmplifier Linearity +/- 1 dBAmplitude Measurement 0 to 100% FSH, with 1% resolutionDelay 25,400 mm (0 - 999.9”) at steel velocityMeasurement Gate One gate with audible and visual alarm. Amplitude 5-95%, 1% stepsSetups 64 custom user defined setups; factory setups can also be edited by the userAuto Set Automates the detection, scope, and display setting process for each individual boltAlarm Limits Adjustable Hi/Low tolerances with visual LED’s and audible beeperField Calibration Vector or Regression correction curve for increased accuracy using Load & StressAlarm Limits Bar Hi & Lo alarm limits for displaying an acceptable tolerance rangeDetections Zero CrossingTime NanosecondsElongation 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 lengthBolt Materials Select types from a preset or custom listGlue-On Available for short bolts with minimal/short elongations to eliminate transducer placement errors
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- Technical Information
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Technical SpecificationDakota BT Bolt Tension Monitor
Part Number Description Certificate Z-156-0008 Dakota BT1-DL Bolt Tension Monitor (MiniMax) 
Operating Temperature -10 to 60ºC (14 to 140ºF) Power Supply 3 x AA batteries and via USB Battery Life Alkaline 35 hrs, Nicad 10 hrs, NI-MH 35 hrs Gauge Weight 383g (13.5oz) - including batteries Gauge Dimensions 63.5 x 165 x 31.5mm (2.5 x 6.5 x 1.24”) Packing List Unit, 3 AA Batteries, 4 oz. Bottle of Couplant, USB Type A to Type C Transfer Cable, Carrying Case, 10’ Lemo to Microdot Transducer cable, PC Utility Software (download from website), Operation Manual and Certification. ● Certificate supplied as standard
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- Standards
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StandardsDakota BT Bolt Tension Monitor
Factory calibration traceable to NIST & MIL-STD-45662A
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- Downloads
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Downloads
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Dakota BT1-DL Bolt Tension Monitor (MiniMax) Instruction Manual
- Part Numbers
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Part NumbersDakota BT Bolt Tension Monitor
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Dakota BT1-DL Bolt Tension Monitor (MiniMax)- Part Number : Z-156-0008
- Accessories
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AccessoriesDakota BT Bolt Tension Monitor
Part NumberN-306-0010
Part NumberN-402-0510
Part NumberN-003-0330
Part NumberA-156-8001
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Dakota BT Bolt Tension Monitor
The Dakota BT Bolt Tension Monitor uses ultrasound to precisely measure fastener elongation, time (nanoseconds), load, stress & %strain.
Summary
Dakota BT Bolt Tension Monitor
When nuts and bolts are fastened together under load the action of tightening the nut increases the force applied to the bolt causing elongation.
By using ultrasonics, bolt tension monitors are not affected by temperature, friction or resistance factors affecting the accuracy of standard torque measurement techniques - giving the Dakota BT1-DL Bolt Tension Monitor accuracy within 0.0001mm (0.00001 inch).
Using the gauge's USB interface together with the optional shut off accessory the gauge can be programmed to automatically stop the tightening process when the appropriate load has been applied.
Features:
- Range of display & measurement options including: Elongation, Load, Stress, and %Strain, RF, Rectified, Large Digits with Limits Bar
- Temperature compensation to counteract measurement irregularity caused by temperature change
- Data storage capability: 4GB internal memory
- Auto Set feature automatically optimizes detection and adjusts display
- Hi/Lo Alarm tolerance limits work in conjunction with the data port
Transducers Options
A wide range of Single Element Contact Transducers available
Key Features
Dakota BT Bolt Tension Monitor
Applications
Wind Turbines
Automotive Frames
Bridge Structures
Theme Parks
Product FeaturesDakota BT Bolt Tension MonitorModel BT1-DL Display Mode Material thickness digits display A-Scan Rectified +/- (half wave view), or RF (full waveform view)Measurement Range PE - 25.4 - 25,400mm (1 - 999”)Resolution 0.001mm (0.0001”) or 0.0001mm (0.00001”) switchableMeasurement Rate Manual 8 readings per secondVelocity Calibration Range 1250 - 13,995m/s (0.0492 - 0.5510 in/μs)Temperature Compensation Limit Alarm Mode Memory and Data Logging 4GB internal memory
Sequential and grid batching
Bitmap graphic capture and capture viewerCalibration Options Automatic, fixed, single and two-pointTransducer Probe Type Single elementTransducer Frequency Range 1 - 10MHzDisplay 1/8” VGA greyscale display (240 x 160 pixels)
Viewable area 62 x 45.7mm (2.4 x 1.8”)Units (Selectable) in/mm, μs, °F/°CLED Backlight On / Off/ AutoRepeatability / Stability Indicator Low Battery Indicator Battery Save Mode AutoTransducer Connector Type Microdot, Lemo and BNCUSB-C Interface Temperature Sensor 5 pin LEMO 1Screen Refresh Rate 30 HzTiming Precision TCXO timing with single shot 100 MHz 8 bit ultra-low power digitizerPulser Type Square Wave. Selectable 100, 150 and 200 volts. Selectable options Spike, Thin, and Wide. 80 to 400nsDamping 50, 75, 100, 300, 600, & 1500ohmsFrequency Band Broadband 1.8 - 19 MHz (-3dB) filterHorizontal Linearity +/- 0.4% FSWVertical Linearity +/- 1% FSHAmplifier Linearity +/- 1 dBAmplitude Measurement 0 to 100% FSH, with 1% resolutionDelay 25,400 mm (0 - 999.9”) at steel velocityMeasurement Gate One gate with audible and visual alarm. Amplitude 5-95%, 1% stepsSetups 64 custom user defined setups; factory setups can also be edited by the userAuto Set Automates the detection, scope, and display setting process for each individual boltAlarm Limits Adjustable Hi/Low tolerances with visual LED’s and audible beeperField Calibration Vector or Regression correction curve for increased accuracy using Load & StressAlarm Limits Bar Hi & Lo alarm limits for displaying an acceptable tolerance rangeDetections Zero CrossingTime NanosecondsElongation 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 lengthBolt Materials Select types from a preset or custom listGlue-On Available for short bolts with minimal/short elongations to eliminate transducer placement errorsTechnical SpecificationDakota BT Bolt Tension MonitorPart Number Description Certificate Z-156-0008 Dakota BT1-DL Bolt Tension Monitor (MiniMax) Operating Temperature -10 to 60ºC (14 to 140ºF) Power Supply 3 x AA batteries and via USB Battery Life Alkaline 35 hrs, Nicad 10 hrs, NI-MH 35 hrs Gauge Weight 383g (13.5oz) - including batteries Gauge Dimensions 63.5 x 165 x 31.5mm (2.5 x 6.5 x 1.24”) Packing List Unit, 3 AA Batteries, 4 oz. Bottle of Couplant, USB Type A to Type C Transfer Cable, Carrying Case, 10’ Lemo to Microdot Transducer cable, PC Utility Software (download from website), Operation Manual and Certification. ● Certificate supplied as standard -
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