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Calibration Certificates & Traceability System Diagrams

How many points are calibrated for torque wrenches with wide torque measurement ranges?

 In the ISO6789 calibration procedure, a general indicating torque tool (Type A) is calibrated at the maximum torque of 100%, and at approximately 60% and 20%.
However, the DB series / CDB-S series / T-S series of dial indicating torque wrenches that have wide measurement ranges that can even measure under 20%, provide four calibration points including the minimum torque under 20%.
The calibration certificate below is an excerpt from the DB280N-1/2-S dial torque wrench that has a measurement range of 30-280N・m.
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