Catalog excerpts
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OPERATION MANUAL Load Cell for Manually Operated Presses Model 8451
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In diesem Handbuch finden Sie alle Informationen, die Sie für die Inbetriebnahme und den Betrieb dieses Gerätes benötigen. This operation manual provides you with all information necessary for the set-up and operation of the instrument. Haben Sie wider Erwarten dennoch Probleme, hilft Ihnen der zuständige Produktingenieur weiter. Rufen Sie uns einfach an unter Tel. 07224/645-0 oder unter der auf dem Lieferschein angegebenen Telefon-Durchwahl. Gerne können Sie uns auch eine email mit Ihren offenen Fragen schicken. If, contrary to expectations, you face any problems with the operation of the...
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Technical Product Information Commissioning, Function, Fitting Specification Model 8451 - 1/12 -burster prazisionsmesstechnik gmbh &co kg ■ Talstr. 1-5 ■ 76593 Gernsbach ■ Tel.: (+49) 07224-6450 ■ www.burster.de ■ info@burster.de
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Technical Product Information Commissioning, Function, Fitting Specification Model 8451 The load cells in the model 8451 series are primarily designed for the measurement of force in production equipment, using Newtons (N) as the unit of measurement. The local gravitational acceleration (g « 9.81 m/s2) must be taken into account when determining masses. 2. Preparing for use > Inspect the sensor carefully for damage. If you suspect that the unit has been damaged during shipping, notify the delivery company within 72 hours. Keep all packaging materials for inspection by the representative of...
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Technical Product Information Commissioning, Function, Fitting Specification Storage The sensor must be stored under the following conditions only: dry no condensation temperature between 0 °C and 60 °C Note: Provided the storage conditions have been observed, no special steps need to be taken after storage and prior to commissioning. The sensor operates with the aid of a spring element. The force to be measured deforms the spring element elastically. This deformation is transformed into an electrical signal by strain gauges. They, together with the spring element, constitute the...
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Technical Product Information Commissioning, Function, Fitting Specification Mechanical design Measurement ranges smaller than 0...2 kN In the sensors with measurement ranges smaller than 0...2 kN a horizontally mounted elastic membrane is used as the spring element. Strain gauge principle of a horizontally mounted membrane This elastic membrane is deflected by the applied force, resulting in a reduction in the sensor’s overall height. This deformation cannot be seen by the naked eye. It is measured by strain gauges. In these sensors the strain gauges are mounted on the underside of the...
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Technical Product Information Commissioning, Function, Fitting Specification Function of the strain gauge The electrical resistance of a wire rises with increasing length and falling crosssection. When a wire is pulled, it becomes thinner and longer – both of these effects result in an increase in its electrical resistance. This is the principle on which the function of strain gauges is based. In practice, however, strain gauges do not consist of a single wire, but of a metal foil laminated onto a carrier material. The metal foil is etched to create a meandering structure (see Figure 3:)....
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Technical Product Information Commissioning, Function, Fitting Specification Model 8451 In addition to the four strain gauges shown here, compensation resistors to reduce the effect of temperature and balancing resistors to balance the bridge circuit are also incorporated. Depending on the sensor model, further resistors for the purpose of standardizing the rated characteristic are integrated into the cable or the connector. The output voltage of the sensor at maximum load, U a , is calculated as follows: Ua = c x U b U b : excitation voltage c: characteristic value (sensitivity) of the...
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Technical Product Information Commissioning, Function, Fitting Specification External forces CAUTION! Sensor will be damaged! Avoid vibrations, even if the loads caused by these vibrations are less than the rated maximum. Design your measuring system in such a way as to prevent these external forces. Note: External forces, acting on the sensor, adulterate the result materially. External forces here refer to any force that acts outside the sensor's axis of symmetry - transverse forces, bending moments and twisting moments in particular. Overload protection Sensors with measuring ranges up to...
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Technical Product Information Commissioning, Function, Fitting Specification Model 8451 The sensor peg has two flat faces, allowing for two different orientations when fitting the sensor. This means that you can fit the sensor on presses designed for left-handed or right-handed operators without the sensor cable getting in the way. Unlike other sensors, the 8451 sensor can be fitted without any extra mechanical parts for guiding forces onto the sensor axis. 4.1.2 Mounting It is important to ensure when fitting the 8451 sensor that the force will be applied axially to the sensor. This is...
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Technical Product Information Commissioning, Function, Fitting Specification Electrical system, evaluation instrumentation CAUTION! If the cable sheath is damaged, fluids can penetrate and damage the sensor. For this reason: Take suitable precautions to relieve the bending stress exerted by the connecting cable on the cable bushing at the sensor housing. In particular, pulsating or alternating loads acting on this bushing will damage it and hence the cable will come loose. Make sure that you lay the cables with sufficiently large bend radii. Avoid vibration on the cables. Protect the cables...
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Technical Product Information Commissioning, Function, Fitting Specification Measuring chain adjustment The sensors of the model 8451 are calibrated ex works. Because of this, every sensor has an individual test and calibration report. However, you basically have to align every following electronic to the particular sensor. After this adjustment you have done a basic adjustment of the measuring chain. Using the data of the test and calibration report Depending on the type of the following electronic, you are able to insert the data of test and calibration report directly or you have to use...
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