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Burster 8631 Operation Manual

Precision torque sensor
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© 2023
burster
präzisionsmesstechnik gmbh & co kg
All rights reserved
Valid from:
June 14, 2023
OPERATION MANUAL
Precision torque sensor
Model 8631
Manufacturer:
burster
präzisionsmesstechnik gmbh & co kg
Talstrasse 1 - 5
76593 Gernsbach
Germany
Tel.: +49 7224 645-0
Fax: +49 7224 645-88
Email: info@burster.de
www.burster.de
4402-BA8631EN-5999-061529
Postfach 1432
76593 Gernsbach
Germany

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Summary of Contents for Burster 8631

  • Page 1 OPERATION MANUAL Precision torque sensor Model 8631 Manufacturer: © 2023 burster burster präzisionsmesstechnik gmbh & co kg präzisionsmesstechnik gmbh & co kg All rights reserved Talstrasse 1 - 5 Postfach 1432 76593 Gernsbach 76593 Gernsbach Germany Germany Valid from: June 14, 2023 Tel.: +49 7224 645-0...
  • Page 2 “product”) are the result of targeted development and meticulous research. From the date of delivery, burster provides a warranty for the proper condition and functioning of these products covering material and production defects for the period specified in the warranty document accompanying the product.
  • Page 3 of 32...

  • Page 4: Table Of Contents

    4.2.3 Pin-out of the USB connector ................23 4.2.4 Power supply for the 8631 torque sensor fitted with USB ........24 4.2.5 Power supply for the 8631 torque sensor with built-in electronics via the circular connector ......................24 4.2.6 Power supply for the 8631 torque sensor without built-in electronics....24 4.2.7 Cable ........................
  • Page 5 4.3 Measurement operation ....................27 4.3.1 Switching on ......................27 4.3.2 The torque direction ....................27 4.3.3 Check function (for 8631 with instrumentation amplifier) ........28 4.3.4 Dual-range sensor ....................28 Calibration and adjustment ....................29 5.1 Factory calibration ......................29 5.2 Calibration certificate with accreditation symbol ..............

  • Page 6: For Your Safety

    Property damage to the equipment or the surroundings will result if the hazard is not avoided. Note: It is important to heed these safety notices in order to ensure you handle the model 8631 torque sensor correctly. IMPORTANT: Follow the information given in the operating manual.

  • Page 7: General Safety Instructions

    General safety instructions The model 8631 torque sensor is state of the art, and is safe to operate. However, if the 8631 torque sensor is not used or operated as intended, it may present a hazard. DANGER Electric shock hazard!

  • Page 8: Introduction

    The respective upper range value is shown on the type plate. Both the low mass of the model 8631 torque sensor and its high torsional rigidity are an advantage when measuring dynamic torques. However, you need to pay attention to the spring constant and the cut-off frequency of the model 8631 torque sensor with such measurements.

  • Page 9: Ambient Conditions

    • Avoid radiant heat or cooling from one side. • Protect the 8631 torque sensor from moisture. • The 8631 torque sensor is not resistant to chemical agents. Do not use the sensor in a corrosive environment. • Keep the bearings and connectors free of dust, dirt and other foreign matter.

  • Page 10: Contents Of Pack

    Only ever use the 8631 torque sensor under the conditions specified in this operation manual. Inspect the model 8631 torque sensor for damage. If you suspect that the unit has been damaged during shipping, notify the delivery company within 72 hours.

  • Page 11: Modifications And Maintenance

    The model 8631 torque sensor does not contain any parts that are intended to be serviced by the user. Only the manufacturer’s own qualified personnel are permitted to open the model 8631 torque sensor.

  • Page 12: Device Design And General Information

    The 8631 torque sensor does not contain any rotating parts. The shaft is joined directly to the housing on the drive side. Strain gages are mounted on the shaft, which acts as the torsion bar in the 8631 torque sensor. The torque is applied to the shaft end labeled “TEST SIDE”. The housing provides protection for the sensitive measurement electronics.

  • Page 13: 8631 Torque Sensor With Bridge Output

    With the built-in amplifier option, the 8631 torque sensor outputs directly a torque-proportional voltage of 0 ... ±10 V. The Micro USB port can be used to configure the 8631 torque sensor. For instance it is possible to set a filter frequency, configure averaging and set a tare function. With the USB option, in addition to the voltage output, the measurement function is available via USB as well.
  • Page 14 Schematic diagram Figure 3: Model 8631-XXXX-VXX3X0 output mV/V Model 8631-XXXX-VXX4X0 output mV/V and TEDS The housing of the 8631 torque sensor must be grounded. of 32...

  • Page 15: 8631 Torque Sensor With Amplifier

    The housing of the 8631 torque sensor must be grounded. Torque sensor model 8631-XXXX-VXX0X0 The Micro USB socket on the 8631-XXXX-VXX0X0 torque sensor is used for configuring the 8631-XXXX- VXX0X0 torque sensor, or specifically its analog output. Disconnect the plug from the circular connector while configuration is in progress to prevent ground loops.

  • Page 16: Static And Quasi-Static Torques

    N = 100 • Low-pass filter: Programming instructions The dedicated interface manual (Precision torque sensor model 8631 – Interfaces manual) available at www.burster.com contains precise details of the programming instructions. When using the DigiVision PC software, you can configure the sensor via the user interface.

  • Page 17: Dynamic Torques

    Estimating the mechanical resonant frequency As a first approximation, the resonant frequency of the entire test setup depends on the spring constant “c” of the model 8631 torque sensor and the moment of inertia “J” of the attached components. Resonant frequency in Hz...

  • Page 18: Interference

    Interference Possible sources of interference: • Temperature change • Temperature gradient • Vibration • Spurious forces • EMC • Electrical interference • Magnetic interference • Angular, axial or radial shaft misalignment IMPORTANT: Take suitable measures to counter these sources of interference because otherwise they may cause an incorrect measurement result, e.g.
  • Page 19 Return the 8631 torque sensor Shaft overloaded to the manufacturer Calibration not correct Recalibrate Return to manufacturer for Torque reading incorrect 8631 torque sensor is faulty repair Torque bypass Remove bypass Vibrations Isolate from vibrations Torque fluctuations Air movements Fit cover...

  • Page 20: Installation

    Make sure you fit the 8631 torque sensor the correct way round. The housing is fitted to the drive side of the sensor. The side of the 8631 torque sensor to be used for measurement is labeled “TEST SIDE”:...

  • Page 21: Preparing For Alignment And Fitting

    Use a solvent such as acetone to clean the shafts before fitting. Note: Fit the 8631 torque sensor loosely at first before alignment. Do not tighten the screws at this stage. Note: Make sure the whole assembly is exactly in line when aligning the 8631 torque sensor and/or the shafts.

  • Page 22: Installation Options

    4.1.2 Installation options The model 8631 static torque sensors do not need to be additionally fixed; they are mounted exclusively via the two flanges, via which the torque is also introduced. Through-holes and threaded holes are provided for integration. Please observe the maximum permissible torque of the fixing screws.

  • Page 23: Pin-Out Of The Electrical Socket

    4.2.3 Pin-out of the USB connector The USB interface complies with the USB 2.0 standard and the pin assignment is as usual. The built-in connector on the 8631 torque sensor is for a “Micro USB” plug. Name +5 V Data -...

  • Page 24: Power Supply For The 8631 Torque Sensor Fitted With Usb

    The 8631 torque sensor works in an operating voltage range of 5 … 30 V DC – measured at the 8631 torque sensor. When using cables of small cross-section or with an extension, you must take into account the voltage drop in the cable.

  • Page 25: Connecting The Shield

    When calculating the cable resistance you must take into account both excitation leads for the 8631 torque sensor. i.e. Cable resistance = 2x resistance of the cable length burster präzisionsmesstechnik gmbh & co kg calibrates all sensors in combination with the cable length ordered.
  • Page 26 • Position the model 8631 torque sensor outside of the electromagnetic field of high-energy equipment. This includes transformers, motors, contactors, frequency converters and so forth. Otherwise the electromagnetic fields from such equipment will act with their full effect on the measuring chain, causing incorrect measurements.

  • Page 27: Measurement Operation

    A torque is clockwise (clockwise torque) if the torque is exerted clockwise when looking at the test side. In this case you will get a positive electrical signal at the output from the 8631 torque sensor. Figure 12: Clockwise torque (looking at the test side) You can use model 8631 torque sensors to measure both clockwise and counterclockwise torques.

  • Page 28: Check Function (For 8631 With Instrumentation Amplifier)

    (Excitation +) additionally to Pin 6 of the connector. As long as this voltage is applied to Pin 6, a precise voltage of 10.00 V is available at the output of the 8631 torque sensor. This can be used to calibrate indicators, input boards or other evaluation equipment connected to the output of the sensor.

  • Page 29: Calibration And Adjustment

    Calibration and adjustment Model 8631 torque sensors from burster präzisionsmesstechnik gmbh & co kg are already traceably adjusted and tested in the factory. As an option, we offer DAkkS or factory calibration of the model 8631 torque sensor. Factory calibration As part of the traceable burster factory calibration, the 8631 torque sensor is checked for calibratability, and is then calibrated and marked with a calibration label, and a calibration certificate is issued.

  • Page 30: Taking Out Of Use

    • Remove the 8631 torque sensor properly. • Protect the 8631 torque sensor from knocks. • Protect the 8631 torque sensor against bending moments. • Support the model 8631 torque sensor. • Do not drop the model 8631 torque sensor under any circumstances. of 32...

  • Page 31: Technical Data

    Technical data Please refer to the enclosed data sheet for the technical specification. The latest version of the data sheet is available at https://tinyurl.com/m6ux9uam. Figure 15: Technical data QR code Electromagnetic compatibility Interference immunity Interference immunity in compliance with EN 61326-2-3:2006 Industrial environment Interference emission Interference emission in compliance with EN 61326-2-3:2006...

  • Page 32: Disposal

    Disposal Disposal If your torque sensor is no longer usable, please comply with your legal obligations by disposing of it in accordance with applicable regulations. You will then be helping to protect the environment! of 32...

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