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THE LOAD CELL AND STRAIN GAUGING SPECIALISTS

Load Cell – Calibration

PCM offer a calibration or repair service for damaged or suspect working load cells. We are able to work on most load cell makes and models from small to very large capacities.

These services can eliminate the need to purchase new, replacement load cells and so making considerable savings.

PCM have a number of high precision calibration machines and are in a position to calibrate all kinds of load cells.

Machines
  • ±10kN Hand Press, tension and compression, calibrated to BS EN ISO 7500-1:2004, Grade 0.5.
  • ±100kN Hand Press, tension and compression, calibrated to BS EN ISO 7500-1:2004, Grade 0.5.
  • ±400kN Amsler Machine, tension and compression, calibrated to BS EN ISO 7500-1, Grade 2004, Grade 0.5.
  • 2000kN Avery Denison Compression Machine, calibrated to BS EN ISO 7500-1:2004, Grade 1.
  • ±1500Nm Torsion calibration using in-line reference torque transducers, calibrated to UNI 11314, Grade 0.5.
  • Selection of Dead Weights which fall within OIML M1 tolerance, tested every 36 months.

All test machines are independently calibrated by a UKAS traceable contractor using verification equipment calibrated to BS EN ISO 376:2011, every 12 months.

Specialised calibration engineers, under the control of PCM’s quality department perform all calibrations and tests.

Each re-calibration undergoes a five point linearity run and three times repeatability over the full specified loading range.

Customer Options
  • To alter the calibration format that suits the customers application, ie:- increased number of points or vary the scatter of points in a particular area of the calibration curve.
  • To supply copies of the test machine certificates to maximise the traceability.

To complete a calibration we would require the following information:

  • Type of calibration: Tensile, compression, torsion.
  • Number of linearity points.
  • Desired units of calibration.
  • If an indicator is connected to the load cell, to have automatic calibration adjustment.
  • Shunt calibration resistor.
  • The mechanical fitment. If we do not have the necessary fittings in our vast stock, we can organize manufacture of these parts and stock them for future calibrations.

The recommended general recalibration period is 12 months. Recalibration periods are purely a recommendation under normal service conditions.

Factors that may suggest for requirement for more or less recalibrations are:

  • The critical nature of the device under test.
  • Frequency of use.
  • The environment of harsh treatment it may be subjected to.
  • In house QA requirements.

Ultimately, it is our customer’s QA procedures that will govern the frequency.

PCM can turn most calibrations around in 3-4 working days. If you require a faster service, you can pre-book a date for the calibration. We aim to have flexible and efficient service without compromising on quality.