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© 2018
burster
praezisionsmesstechnik gmbh & co kg
All rights reserved
Valid from:
02.10.2018
OPERATION MANUAL
Precision torque sensor
model 8625
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
2786-BA8625EN-5170-091527
P.O. Box 1432
76593 Gernsbach
Germany
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Table of Contents
Related Manuals for Burster 8625
Summary of Contents for Burster 8625
- Page 1 OPERATION MANUAL Precision torque sensor model 8625 Manufacturer: © 2018 burster burster praezisionsmesstechnik gmbh & co kg praezisionsmesstechnik gmbh & co kg All rights reserved Talstr. 1 - 5 P.O. Box 1432 76593 Gernsbach 76593 Gernsbach Germany Germany Valid from: 02.10.2018...
- 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.
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Page 4: Table Of Contents
4.2.3 USB pin assignment ......................28 4.2.4 Power supply for torque sensor model 8625 fitted with USB ..........29 4.2.5 Power supply for torque sensor model 8625 with built-in electronics via the circular connector ............................29 4.2.6 Power supply for torque sensor model 8625 without built-in electronics ......29 4.2.7 Cables ...........................30... - Page 5 4.3 Measurement ........................... 32 4.3.1 Switching on .......................... 32 4.3.2 The torque direction ......................32 4.3.3 Check function (for 8625 with instrumentation amplifier) ............. 33 Calibration and adjustment ........................34 5.1 Factory calibration ........................... 34 5.2 DAkkS (DKD) calibration (DIN 51309)..................... 34 5.3 Recalibration ............................
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Page 6: Safety Instructions
It is important to heed these safety instructions in order to ensure correct handling of the torque sensor model 8625. IMPORTANT: Follow the information given in the operation manual. 1.1.2 Pictograms Danger of electric shock! Observe the safety notices for protecting the torque sensor model 8625. of 38... -
Page 7: General Safety Instructions
General safety instructions The torque sensor model 8625 uses state-of-the-art engineering and is safe to operate. However, if the torque sensor model 8625 is not used or operated as intended, it may present a hazard. DANGER Danger of electric shock! -
Page 8: Introduction
The respective upper range value is shown on the type plate. Both the low mass of the torque sensor model 8625 and its high torsional rigidity are an advantage when measuring dynamic torques. However, you need to pay attention to the torsion spring constant and the sensor’s cut-off frequency with such measurements. -
Page 9: Environmental Conditions
• Avoid radiant heat or cooling from one side. • Protect the torque sensor model 8625 from moisture. • The torque sensor model 8625 is not resistant to the effects of chemicals. Do not use the torque sensor model 8625 in a corrosive environment. -
Page 10: Scope Of Delivery
Please note the following when sending the torque sensor model 8625 in for repair: • If there is a problem with the torque sensor model 8625, please attach a note to the sensor case summarizing the fault. -
Page 11: Conversions And Modifications
If you open or dismantle the torque sensor model 8625 during the warranty period, this will void the warranty immediately. The torque sensor model 8625 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 8625. -
Page 12: Device Concept And General Information
You will see these markings “TEST SIDE” on the measurement end of the torque sensor model 8625: Diagram 1: Test side of torque sensor model 8625 Drive side The drive end is the opposite end to the measurement end. The torque sensor model 8625 is also mechanically connected at this end. of 38... -
Page 13: Mechanical Design
With the built-in amplifier option, the torque sensor model 8625 outputs directly a torque-proportional voltage of 0 ... ±10 V. The Micro USB port can be used to configure the torque sensor model 8625. For instance it is possible to set a filter frequency, configure averaging and set a tare function. With the USB option, measurements via USB are available in addition to the voltage output. - Page 14 Torque sensor model 8625 with brigde output The torque sensor model 8625 with bridge output has a 7-pin circular connector. This connector is used to supply the sensor with its required rated excitation voltage and to output the measurement signal in mV/V.
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Page 15: Torque Sensor Model 8625 With Amplifier
3.3.1 Torque sensor model 8625 with amplifier The torque sensor model 8625 with built-in amplifier has two connectors, offering alternative options for operation: 1. 7-pin circular connector, and 2. Micro USB socket. Schematic diagram Diagram 4: Model 8625-XXXX-V000X0 output 0 ... ±10 V incl. configure via USB Model 8625-XXXX-V001X0 output 0 ... -
Page 16: Static And Quasi-Static Torques
N = 100 • Low-pass filter: Programming instructions The dedicated interface manual (Precision torque sensor model 8625 – 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
CAUTION Resonance hazard! Operating the torque sensor model 8625 or the entire test setup close to its resonant frequency will result in permanent damage. Keep the torque frequency well below the resonant frequency of the mechanical test setup. Limit the peak-to-peak torque variation to 70 % of the rated torque. -
Page 18: Interference
Interference Possible sources of interference: • Temperature change • Temperature gradient • Vibration • Spurious forces • EMC • Electrical interference • Magnetic interference • Angular, axial or radial 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 torque sensor model Shaft overloaded 8625 to the manufacturer Calibration not correct Recalibrate torque sensor model 8625 is Return to manufacturer for Torque reading incorrect faulty repair Torque bypass Remove bypass Vibrations Isolate from vibrations Torque fluctuations Air movements...
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Page 20: Installation
Make sure you fit the torque sensor model 8625 the correct way round. The housing is fitted at the attachment end of the sensor. The end of the torque sensor model 8625 to be used for measurement is labelled "TEST SIDE":... -
Page 21: Preparing For Alignment And Fitting
8625. Couplings must be able to slide easily onto the shafts without resistance. Note: Fit the torque sensor model 8625 loosely at first before alignment. Do not tighten the screws on couplings or adapters at this stage. Note: Make sure the whole assembly is exactly in line when aligning the torque sensor model 8625 and/or the shafts. -
Page 22: Installation Options
Diagram 7: Blind threaded holes and locating-pin holes - underside On its end face at the attachment end, the torque sensor model 8625 has six blind threaded holes for fixing the sensor to its surrounding application. Tighten the screws in a diagonal pattern to the specified tightening torque. - Page 23 Always tighten the fixing screws in a star pattern. If the torque sensor model 8625 is supplied fitted with a mounting flange (sensor model 8625-XXXX-V00X40), this flange forms an integral part of the torque sensor model 8625 and is calibrated with the sensor.
- Page 24 Installation using a bracket The torque sensor model 8625 can be supplied with a bracket as an accessory. This bracket must be fitted independently by the customer and is not included in the calibration. The bracket is screwed onto the attachment end of the torque sensor model 8625 using six fixing screws.
- Page 25 We recommend using split metal-bellows couplings, model 8691, to attach the shaft at the measurement end ("TEST SIDE"). The advantage of the 8691 metal-bellows couplings is that they can correct any misalignments of the shaft. Even if the torque sensor model 8625 has been precisely aligned, very slight misalignments can still arise.
- Page 26 8625. When using the mounting flange, tighten its fixing screws in a diagonal pattern. Diagram 5: Mounting example of torque sensor model 8625 of 38...
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Page 27: Electrical Connection
Electrical connection Diagram 6: Electrical connection 4.2.1 Power supply DANGER Danger of electric shock! Because of size constraints, the supply voltage, output voltage and USB socket are not galvanically isolated. This means that the device has common digital and analog grounds, which are connected to the housing. -
Page 28: Connector Pin Assignments
4.2.3 USB pin assignment The USB interface complies with the USB 2.0 standard and the pin assignment is as usual. The built-in connector on the torque sensor model 8625 is a “micro USB” plug. Name + 5 V Data -... -
Page 29: Power Supply For Torque Sensor Model 8625 Fitted With Usb
The torque sensor model 8625 works in an operating voltage range of 5 ... 30 VDC – measured at the torque sensor model 8625. When using cables of small cross-section or with an extension, you must take into account the voltage drop in the cable. -
Page 30: Cables
4.2.8 Connecting the shield The shield together with the torque sensor model 8625 and the external electronics form a Faraday cage. Thanks to this cage, electromagnetic interference usually does not affect the measurement signal. IMPORTANT: The torque sensor model 8625 must always be grounded reliably by means of its fixing screws. -
Page 31: Running Cables
Diagram 10: Layout of a cable with excess length • Locate the torque sensor model 8625, cable and measuring instrument outside the field of high-energy equipment. These include 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 32: Measurement
The torque direction A torque is clockwise (clockwise torque) if the torque is exerted clockwise when looking at the measurement end. In this case you will get a positive electrical signal at the torque sensor model 8625 output. Diagram 11: Torque, clockwise (looking at measurement end) You can use the torque sensor model 8625 to measure both clockwise and counterclockwise torques. -
Page 33: Check Function (For 8625 With Instrumentation Amplifier)
Check function (for 8625 with instrumentation amplifier) The torque sensor model 8625 with analog output has a Check function. This Check function is actuated electronically by applying the supply voltage (Excitation +) additionally to Pin 6 of the connector. As long as this connection is made to Pin 6, a precise voltage of 10.00 V is available at the output of the torque... -
Page 34: Calibration And Adjustment
8625. Factory calibration As part of the traceable burster factory calibration, the torque sensor model 8625 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 35: Taking Out Of Use
• Protect the torque sensor model 8625 from knocks. • Protect the torque sensor model 8625 against bending moments. • Support the torque sensor model 8625. • Do not drop the torque sensor model 8625 under any circumstances. of 38... -
Page 36: 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://www.burster.com/en/sensors/torque/p/detail/8625/. Electromagnetic compatibility 7.1.1 Interference immunity Interference immunity to EN 61326-2-3:2006 Industrial locations 7.1.2 Emitted interference Emitted interference to EN 61326-2-3:2006... -
Page 37: Accessories
Accessories Please refer to the enclosed data sheet for the technical specification. The latest version of the data sheet is available at: https://www.burster.com/en/sensors/torque/p/detail/8625/. Software Please refer to the enclosed data sheet for detailed information about the DigiVision configuration and analysis software. The latest version of the data sheet is available at: https://www.burster.com/en/sensors/torque/p/detail/8625/. -
Page 38: Disposal
Disposal Equipment disposal Please fulfill your legal obligations and dispose of unserviceable equipment in accordance with applicable legal requirements. Thus you contribute to environmental protection. of 38...