Operation Manual Load Cell Model 8526
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Operation Manual Load Cell Model 8526 - 1

OPERATION MANUAL Load Cell Model 8526

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Operation Manual Load Cell Model 8526 - 2

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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Operation Manual Load Cell Model 8526 - 3

Technical Product Information Commissioning, Function, Fitting Specifications Load Cell Model 8526 1. Introduction The load cells in the model 8526 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. Preparations for use 2.1 Unpacking 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...

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Operation Manual Load Cell Model 8526 - 4

Technical Product Information Commissioning, Function, Fitting Specifications Model 8526 2.4 Storage The sensor must be stored under the following conditions only: • Note: Provided the storage conditions have been observed, no special steps need to be taken after storage and prior to commissioning. 3. Principle of operation 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 measuring element of...

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Operation Manual Load Cell Model 8526 - 5

Technical Product Information Commissioning, Function, Fitting Specifications Model 8526 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 the 8526 devices, the strain gauges are mounted on the underside of the spring element. This ensures that they are subject to the same deformation as the spring element. 3.3 Function of the strain gauge The electrical resistance of a wire rises with increasing length and falling cross-section. When a wire...

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Operation Manual Load Cell Model 8526 - 6

Technical Product Information Commissioning, Function, Fitting Specifications Model 8526 3.4 Strain gauge wiring In order to reduce undesirable influences on the measurement, the strain gauges in the 8526 are connected as a Wheatstone bridge. Figure 3: illustrates this wiring in a simplified form. white Strain gauge full bridge used by sensors of the model 8526 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...

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Operation Manual Load Cell Model 8526 - 7

Technical Product Information Commissioning, Function, Fitting Specifications Model 8526 3.2 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. 3.3 Overload protection Diaphragms are...

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Operation Manual Load Cell Model 8526 - 8

Technical Product Information Commissioning, Function, Fitting Specifications 4. Installation 4.1 Surrounding mechanical parts and fastening 4.1.1 Adaptation Mounting surface A high quality measurement depends on a defined deformation of the measuring element under load. In order to be certain of excluding any unwanted deformations, the sensor must lie flat on the mounting surface. The mounting surface must satisfy the following requirements: • adequately stable • hardened, minimum hardness 60 HRC • polished, preferably lapped, surface quality: N3 (RZ 1), evenness 2 µm • not coated in any...

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Operation Manual Load Cell Model 8526 - 9

Technical Product Information Commissioning, Function, Fitting Specifications Model 8526 4.1.2 Mounting Caution. Risk of damage to sensor! The sensor cable contains components that affect the sensitivity of the sensor. Never shorten the sensor cable. Caution. The spring body will be damaged if you clamp the load cell by its sides or press-fit the load cell in a hole! Only fix the sensor in place as specified in these instructions. The model 8526 sensor is solely intended for measuring compression forces. Fastening components are therefore only suitable for the task of fixing the sensor in...

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Operation Manual Load Cell Model 8526 - 10

Technical Product Information Commissioning, Function, Fitting Specifications Model 8526 Screws There are three threaded holes at the lower side of the load cell. They are located on reference circle “T” (refer to data sheet) with a pitch of 120°. The exact dimensions are dependent on the measurement range of the load cell: • Measurement ranges ≤ 0 ... 50 kN: Thread M2.5, depth 3 mm • Measurement ranges ≥ 0 ... 100 kN: Thread M4; depth 6 mm Three threaded holes are located at the lower side of the 8526 load cell. They are used to hold the load cell firm in it’s position. -8burster...

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Operation Manual Load Cell Model 8526 - 11

Technical Product Information Commissioning, Function, Fitting Specifications Model 8526 4.2 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....

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