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1.1 The purpose of this practice is to specify the procedure for the calibration of torque transducers.
Note 1: Verification by deadweight and a lever arm is an acceptable method of verifying the torque indication of a testing machine. Tolerances for weights used are tabulated in Practice E2624; methods for calibration of the weights are given in NIST Technical Note 577, Methods of Calibrating Weights for Piston Gages.2
1.2 The values stated in SI units are to be regarded as standard. Other metric and inch-pound values are regarded as equivalent when required.
1.3 This practice is intended for the calibration of static torque measuring instruments. The practice is not applicable for dynamic or high-speed torque calibrations or measurements, nor can the results of calibrations performed in accordance with this practice be assumed valid for dynamic or high speed torque measurements.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
4.1 Testing machines that apply and indicate torque are in general use in many industries. Practice E2624 has been written to provide a practice for the torque verification of these machines. A necessary element in Practice E2624 is the use of devices whose torque characteristics are known to be metrologically traceable to the International System of Units (SI). Practice E2428 describes how these devices are to be calibrated. The procedures are useful to users of testing machines, manufacturers and providers of torque measuring instruments, calibration laboratories that provide calibration services and documents of metrological traceability, and service organizations using devices to verify testing machines.
| SDO | ASTM: ASTM International |
| Document Number | E2428 |
| Publication Date | May 15, 2015 |
| Language | en - English |
| Page Count | 12 |
| Revision Level | 15a |
| Supercedes | |
| Committee | E28.01 |
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