Torque wrench calibration, week

1. Hexagon reducer bushes in accordance with JJG707-90 of the torque wrench calibration procedures.Refer to torque wrench torque wrench accuracy test results with a torque wrench setting of deviation.Repeatability means the same torque wrench on the same conditions, hydraulic torque wrench chart detected the same torque value, the consistency of the test results.Prevailing torque wrench accuracy of 4%, torque wrench is detected, more than 4% the scope of errors depending on the torque wrench.Torque Wrenches out there are two main reasons: ⑴ torque wrench mutations (jam or poor repeatability).Because of the torque wrench and high frequency of use for a long time, internal parts subject to wear, deformation, resulting in torque mutations.

⑵ excursion of the torque wrench.Passed due to torque wrench measures rely on springs, in frequent use, can produce some drift.(Drift refers to the actual testing of torque wrench error with the torque wrench setting value)
2. refers to the day in the week just before using a torque wrench to the torque wrench settings for testing and understanding of the torque wrench.Due to the torque wrench after frequent use and are prone to drift, it should verify that the torque wrench before starting the work week, check the status of a torque wrench and adjust the drift, ensure the accuracy of the torque wrench.