Burster 8655 Operation Manual

Torque sensor
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© 2023
burster
praezisionsmesstechnik gmbh & co kg
All rights reserved
Valid from
09.02.2023
OPERATION MANUAL
Torque Sensor
Model 8656
Manufacturer:
burster
praezisionsmesstechnik gmbh & co kg
Talstr. 1 - 5
76593 Gernsbach
Germany
Tel.: +49-7224-645-0
Fax.: +49-7224-645-88
Email: info@burster.com
www.burster.com
Talstr. 1 - 5
76593 Gernsbach
Germany
4357-BA8656EN-5699-021525

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Summary of Contents for Burster 8655

  • Page 1 & co kg praezisionsmesstechnik gmbh & co kg All rights reserved Talstr. 1 - 5 Talstr. 1 - 5 76593 Gernsbach 76593 Gernsbach Germany Germany Valid from 09.02.2023 Tel.: +49-7224-645-0 Fax.: +49-7224-645-88 Email: info@burster.com www.burster.com 4357-BA8656EN-5699-021525...
  • Page 2 Furthermore, burster assumes no liability for direct, indirect or incidental damages as well as consequential or other damages arising from the provision and use of the present documentation..
  • Page 3 von 28...
  • Page 4: Table Of Contents

    Contents For your safety ........................6 1.1. Symbols used in this manual ................... 6 1.1.1. Signal words ......................6 1.1.2. Pictograms ......................6 1.2. General safety instructions ....................7 Introduction ..........................8 2.1. Intended use ........................8 2.2. Customer service ......................8 2.2.1.
  • Page 5 USB version of the torque sensor model 8656 ..............24 Options ............................ 24 7.1. Angle / speed measurement .................... 24 7.1.1. General information ....................24 7.1.2. Details ........................24 Calibration and adjustment ....................25 8.1. Factory calibration ......................25 8.2. Calibration certificate with accreditation symbol .............. 25 8.3.
  • Page 6: For Your Safety

    For your safety The following symbols on the torque sensor model 8656 and in this operation manual warn of hazards. 1.1. Symbols used in this manual 1.1.1. Signal words The following signal words are used in the operation manual according to the specified hazard classification.
  • Page 7: General Safety Instructions

    1.2. General safety instructions The torque sensor model 8656 uses state-of-the-art engineering and is safe to operate. However, if thetorque sensor model 8656 is not used or operated as intended, it may present a hazard. DANGER Danger of electric shock! The following instructions must be followed to prevent electric shock and injuries: •...
  • Page 8: Introduction

    8656. 2.2.2. Contact person If you have any questions relating to the torque sensor model 8656, please contact your representative or go directly to burster präzisionsmesstechnik gmbh & co. kg. Headquarters burster präzisionsmesstechnik gmbh & co kg Talstraße 1 - 5...
  • Page 9: Environmental Conditions

    2.3. Environmental conditions • Avoid radiant heat or cooling from one side. • Protect the torque sensor model 8656 from moisture. • The torque sensor model 8656 is not resistant to the effects of chemicals. Do not use the torque sensor model 8656 in a corrosive environment. •...
  • Page 10: Scope Of Delivery

    (immovable) in its packaging. 2.7. Warranty burster praezisionsmesstechnik gmbh & co kg provides a manufacturer's warranty for a period of 24 months after delivery. Any repairs required during this time will be made without charge. This does not include damage arising from improper use.
  • Page 11: Conversions And Modifications

    2.8. Conversions and modifications Note: f you open or dismantle the torque sensor model 8656 during the warranty period, this will void the warranty immediately. The torque sensor model 8656 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 torque sensor model 8656.
  • Page 12: Definitions

    2.9. Definitions Test side The test side is that end of the shaft at which you apply the torque being measured to the torque sensor model 8656. This side normally has the smallest moment of inertia. You will see these markings on the measurement end of the torque sensor model 8656: Diagram 1 Test side torque sensor model 8656 Drive side...
  • Page 13 You can use the torque sensor model 8656 to measure both clockwise and counterclockwise torques. If the torque is exerted in an anticlockwise direction (looking at the measurement end), you will get a negative signal at the output. Sign convention for measuring angular displacement If the sensor shaft rotates clockwise (looking at the drive end), channel A leads channel B by 90°.
  • Page 14: Device Design And General Information

    Device design and general information Specifications as full dimensions, mass and power depend on the version of the torque sensor model 8656. Please refer to the data sheet for specifications. 3.1. Mechanical design Diagram 4 Design principle torque sensor 8656 The torque sensor model 8656 essentially consists of three elements: •...
  • Page 15: Principle Of Operation

    3.2. Principle of operation Torque deforms the torsion shaft and, as it does so, also elastically and reversibly elongates the strain gauges mounted on the shaft. The electrical resistance of these strain gauges changes proportionally to their elongation. The torque sensor model 8656 has a total of four strain gauges. These are arranged as a Wheatstone bridge circuit and are supplied with a DC voltage by the electronics.
  • Page 16: Determination Of The Resonant Frequency

    3.4.1. Determination of the resonant frequency The resonant frequency of the entire test setup is related to the sensor’s spring constant “c” and to the two moments of inertia “J1” and “J2”, each with the connected molding body. Resonant frequency in Hz Moment of inertia 1 in kg Moment of inertia 2 in kg Spring constant in Nm / rad...
  • Page 17: Installation

    Installation 4.1. Preparing for installation Shafts We recommend an H7/j6 shaft fit to ensure correct assembly and good torque transfer. Mounting surfaces The mounting surfaces for the torque sensor model 8656 or for the optional mounting block must be free of lubricants, particles or burrs.
  • Page 18: Mechanical Installation

    4.2. Mechanical installation 4.2.1. Installation using mounting block NOTICE Avoid excessive torques, bending moments or axial forces! Excessive torques, bending moments or axial forces may damage the torque sensor model 8656. Connect the electrical cable to the torque sensor model 8656 during fitting and monitor the measurement signal.
  • Page 19: Torque Sensor Model 8656 With Analog Connection

    a. Start on the side that is easier to turn. Usually this will be the measurement side. b. Do not exceed the permitted torques. Use a torque wrench. c. Hold screws from the other end when tightening. d. Be aware of the maximum forces that you apply. The resultant torques must lie below the rated torque of the torque sensor model 8656.
  • Page 20: The Connections In Detail

    5.1.3. The connections in detail Voltage output for torque This consists of an operational amplifier with a downstream low pass filter. Diagram 9: Voltage output for torque The connected evaluation circuit should be high impedance (> 10 MΩ). The reference is the potential separated torque output ground.
  • Page 21 TTL output on 3.3 V or other logic The diagram shows adaptation for 3.3 V logic. For other logic levels, appropriate Zener diodes need to be used. Diagram 11: Resistance 10 kΩ, Zener diode 3.3 V Longer transmission paths up to approx. 10 m CAUTION Danger of excessive heating! When connected to a voltage source, the torque sensor model 8656 overheats.
  • Page 22: Running Cables

    If you use extension cables it is not necessary to recalibrate the torque sensor model 8656. However, you will need to adjust the entire measuring chain. IMPORTANT: f a burster cable of type 99540-000F-05200XX is ordered with the sensor, a ceramic capacitor is supplied with the cable. This ceramic capacitor is needed only with torque sensors that include the angle/speed measurement option.
  • Page 23: Measurement

    5.2. Measurement 5.2.1. Switching on 1. Apply the operating voltage to the torque sensor model 8656. 2. The torque sensor model 8656 goes through a self-test mode lasting 4 seconds after power-up. After the self-test has been completed, the sensor is ready for operation. 5.2.2.
  • Page 24: Usb Version Of The Torque Sensor Model 8656

    USB version of the torque sensor model 8656 For the USB version and DigiVision operation, see the DigiVision Torque Sensors Instruction Manual. Options 7.1. Angle / speed measurement 7.1.1. General information The torque sensor model 8656 can be equipped with integral angle/speed measurement. Chapter 7.1.2 „Details“...
  • Page 25: Calibration And Adjustment

    8.1. Factory calibration As part of the traceable burster factory calibration, the torque sensor model 8656 is checked for calibratability, and is then calibrated and provided with a calibration label and a calibration certificate. The burster factory calibration certificate includes the following information as a minimum: •...
  • Page 26: Taking Out Of Use

    Taking out of use • • Remove the torque sensor model 8656 correctly. • Protect the torque sensor model 8656 from knocks. • Protect the torque sensor model 8656 against bending moments. • Support the torque sensor model 8656. • Do not drop the torque sensor model 8656 under any circumstances. von 28...
  • Page 27: Technical Data

    Technical data The data sheet for the torque sensor model 8656 contains the detailed technical specification. You can obtain the latest data sheet and additional information on the torque sensor model 8656 from https://bit.ly/3xrLdSz or simply use the QR code below: Diagram 16 QR code fort he torque sensor model 8656 product page 10.1.
  • Page 28: Disposal

    Disposal Battery disposal As an end user, you are required by law (battery ordinance) to return all used batteries and rechargeable batteries; the disposal through household waste is prohibited. By buying the herein described device you are concerned by this law. Please dispose of your batteries and rechargeable batteries correctly.

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