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ASTM E74-18e1
Standard Practices for Calibration and Verification for Force-Measuring Instruments (Includes all amendments and changes 5/1/2019).
NORMA vydaná dňa 1.2.2018
Informácie o norme:
Označenie normy: ASTM E74-18e1
Dátum vydania normy: 1.2.2018
Kód tovaru: NS-947055
Počet strán: 19
Približná hmotnosť: 57 g (0.13 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM E74-18e1 :
Keywords:
force-measuring instrument, force standard, load cell, proving ring, testing machine ,, ICS Number Code 17.100 (Measurement of force, weight and pressure)
Doplňujúce informácie
| Significance and Use | ||||||||
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4.1 Testing machines that apply and indicate force are in general use in many industries. Practices E4 has been written to provide a practice for the force verification of these machines. A necessary element in Practices E4 is the use of force-measuring instruments whose force characteristics are known to be traceable to the SI. Practices E74 describes how these force-measuring instruments are to be calibrated. The procedures are useful to users of testing machines, manufacturers and providers of force-measuring instruments, calibration laboratories that provide the calibration of the instruments and the documents of traceability, service organizations that use the force-measuring instruments to verify testing machines, and testing laboratories performing general structural test measurements. |
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| 1. Scope | ||||||||
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1.1 The purpose of these practices is to specify procedures for the calibration of force-measuring instruments. Procedures are included for the following types of instruments: 1.1.1 Elastic force-measuring instruments, and 1.1.2 Force-multiplying systems, such as balances and small platform scales. Note 1: Verification by deadweight loading is also an
acceptable method of verifying the force indication of a testing
machine. Tolerances for weights for this purpose are given in
Practices E4; methods for
calibration of the weights are given in NIST Technical Note
5771.2 The values stated in SI units are to
be regarded as the standard. Other metric and inch-pound values are
regarded as equivalent when required.
1.3 These practices are intended for the calibration of static force measuring instruments. It is not applicable for dynamic or high speed force calibrations, nor can the results of calibrations performed in accordance with these practices be assumed valid for dynamic or high speed force 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||
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