Data Sheet Typ 87240
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Data Sheet Typ 87240 - 1

DC/DC Displacement SensorSeries 87240 Code: 87240 EN ■ Ranges 0 ... ± 1.27 mm to 0 ... ± 76.20 mm ■ Integrated amplifier ■ Free of hysteresis ■ Large temperature range from -50° C ... 120° C ■ Suitable for operation in hydraulic fluid up to 3 bar ■ Protection IP64 Application Displacement and all mechanical values which can be converted to displacements (e.g. compressive and tensile force, strain, torque and vibration) may be measured by this DC/DC displacement sensor. Typical application areas are the measurement of displacement and strain on machines, servo systems, vehicles, on test plants, in civil engineering and tunnel construction. An integrated maintenance-free electronic and a high-level DC output signal provide an easy handling without any problems. Green I I Output I —1-0 Blue I Block diagram Description Displacement sensors of series 87240 convert a displacement into an analog electrical signal. They consist of a differential transformer with moveable core, an oscillator and a demodulator. These components are integrated and encapsulated in a cylindrical housing made of stainless steel. The sensors are energized by DC voltage, which is converted to AC by the oscillator and brought to the primary coil of differential transformer. The voltages induced by the two secondary windings of the transformer are demodulated, filtered and switched inverse to each other. The result is a 0 V signal, if the core is in the center position. The direction of an axial core displacement is shown by the polarity of the output voltage. The amplitude of the voltage changes proportional to the magnitude of the core’s displacement and respectively to the measured deflection. In and output terminals of the displacement sensor are galvanically insulated and there is no connection to the housing of the sensor. The mounting of the DC/DC displacement sensor will be done e.g. by a clip enclosing the sensor’s housing. The dynamic unit to be measured should be connected to the core of the sensor. To avoid an influence to the magnetic field and the measured value, coupling elements have to consist of a non magnetizable material like brass, aluminium or non-magnetizable steel. 87240 EN Technical changes reserved. All data sheets at www.burster.com burster praezisionsmesstechnik gmbh & co kg Germany www.bursler.com Talstr. 1-5 Gernsbach 76593 Phone +49-7224-6450 info@bursler.com

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Data Sheet Typ 87240 - 2

Environmental conditions Operation temperature range: - 50 °C ... 120 °C Influence of temperature to measurement signal: refer to table Core version 2 (option for model 87240-000 and 87241-000) The sensor could be delivered with core version 2 on request, without extra charges. Non-linearity: Resolution: Protection class: Mechanical values measurement range extended range acc. to EN 60529 Electrical connection: 4 teflon insulated wires, length 45 cm, color coded Wiring code: red: excitation positive green: signal output black: excitation negative blue: signal output blue is positive, if the...

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