Data Sheet Model 8431 - 4 Pages

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Data Sheet Model 8431

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Code: Delivery: Warranty: Precision Load Cell Model 8431 Model 8432 with overload protection ■ Small dimensions ■ For tension and compression forces ■ Temperature compensation starting at - 55 °C and up to 200 °C optional ■ Minimum lateral sensitivity due to supporting membranes Application Precise tension and compression force measurements can be performed in limited space with model 8431 and 8432 precision miniature load cells. High precision, various measuring ranges, convenient load application via threaded pins with external winding and small dimensions offer a wide scope of applications in laboratories and production. The series are among our most precise and yet mechanically sturdy miniature load cells. All options, typical only for larger load cells, are available with this miniature series such as hermetically sealed construction, overload protection and boring for pressure compensation when applied under vacuum. Its complex design with integrated support membranes and overload protection reduces additional construction effort for external overload protection or guidance of force of applied parts in many applications. This requires little space, has little material and weight and almost no component friction, which could falsify the measurement result. The connection cable suitable for robot applications make the precision miniature load cells especially suitable for use in the areas of special purpose ► Machinery manufacture ► Tool manufacturing ► Handling gear Technical changes reserved. All data sheets at ■ Relative non-linearity from 0.15 % F.S. ■ Measurement ranges from 0 ... 2.5 N to 0 ... 100 kN ■ Model 8432 with overload protection for directions tension and compression Description The force to be measured is applied to the cylindrical sensor unit in the tension or compression direction by means of the two external threads. This means that the sensor must be mounted without any attachments touching the end faces of the sensor housing. This avoids excessive contact pressures on the material and tensions inside the sensor that would affect its measuring element. Please refer to the sensor user manual for guidance on the various options for fitting the sensor, which depend amongst other factors on its measurement range. Although the precision miniature load cell is designed to isolate the measuring element from external forces, torsion and bending moments should be avoided. Two stabilizing support diaphragms inside the sensors for small measurement ranges minimize the effect of transverse forces and moments and ensure long-term mechanical stability for measurements. The network for temperature compensation or standardization of the output signal is located on a sheathed circuit board in a wider section of the sensor's connecting cable. The maximum static operational force is the maximum force in the direction of the measurement axis that the sensor can tolerate. The overload protection is not designed for frequent use of the sensor in the overload range or for sudden loads. The sensors work in any orientation. They have an active side which acts directly on the measuring element, whereas the passive side is fixed to the housing. burster praezisionsmesstechnik gmbh & co kg Germany Talstr. 1-5 ■ Gernsbach 76593 ■ Phone +49-7224-6450

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Electrical values Bridge resistance: (full bridge): measuring range < 0 ...    5 N measuring range > 0 ... 10 N Reference excitation voltage: measuring range < 0 ... 50 N measuring range > 0 ... 100 N Nominal sensitivity: measuring range < 0 ...    5 N measuring range 0 ... 10 N measuring range > 0 ... 20 N Insulation resistance: semi conductor strain gauge 500 Q, nominal foil strain gauge 350 Q, nominal 5 V DC or AC 10 V DC or AC 15 mV/V ... 40 mV/V, nominal 1.5 mV/V, nominal 2 mV/V, nominal 5000 MQ at 50 V DC The bridge output voltage caused by a shunt of this value is given in the...

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Technical Data Model 8431 Order Code Model 8432 with bidirectional overload protection Order Code Only model 8431-6100,    measuring range 0 ... 100 kN High flexible, Teflon isolated strands, cable length approx. 1.7 m with standardization in cable    cable length approx. 2.0 m overall diameter 2.5 mm; minimum bending radius of the cable 20 mm, or 5 mm for static operations. There is no bend protection available. Cable port with Wiring for submarine cable: red brown yellow orange Dimensions: * By ordering studs as spare parts, state serial number of the load cell. Dynamic...

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Permissible External Forces    Rod ends model 8591 Due to this precision miniature load cells construction with two stabilizing support membranes, it is only slightly sensitive to non-centrical forces applied to the sensor. The influence of these undesired external forces cannot be globally quantified with certainty. It depends on the sensor‘s measuring range and from which side the force is applied. As a rule of thumb, the amount of external force influence on the measurement signal is between 0.25 % and 1 % depending on the measurement range as long as it is within the range of the table...

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