Standard Practices for Force Verification of Testing MachinesPřeložit název
NORMA vydána dne 15.5.2016
Označení normy: ASTM E4-16
Datum vydání normy: 15.5.2016
Kód zboží: NS-641185
Počet stran: 11
Přibližná hmotnost: 33 g (0.07 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
calibration, force range, resolution, verification ,, ICS Number Code 19.060 (Mechanical testing)
|Significance and Use|
4.1 Testing machines that apply and indicate force are used in many industries, in many ways. They may be used in a research laboratory to measure material properties, and in a production line to qualify a product for shipment. No matter what the end use of the machine may be, it is necessary for users to know that the amount of force applied and indicated is traceable to the International System of Units (SI) through a National Metrology Institute (NMI). The procedures in Practices may be used to verify these machines so that the indicated forces are traceable to the SI. A key element of traceability to the SI is that the devices used in the verification have known force characteristics, and have been calibrated in accordance with Practice .
4.2 The procedures in Practices may be used by those using, manufacturing, and providing calibration service for testing machines and related instrumentation.
1.1 These practices cover procedures for the force verification, by means of standard calibration devices, of tension or compression, or both, static or quasi-static testing machines (which may, or may not, have force-indicating systems). These practices are not intended to be complete purchase specifications for testing machines. Testing machines may be verified by one of the three following methods or combination thereof:
1.1.1 Use of standard weights,
1.1.2 Use of equal-arm balances and standard weights, or
1.1.3 Use of elastic calibration devices.
Note 1: These practices do not cover the verification of all types of testing machines designed to measure forces, for example, the constant-rate-of-loading type which operates on the inclined-plane principle. This type of machine may be verified as directed in the applicable appendix of Specification .
1.2 The procedures of apply to the verification of the force-indicating systems associated with the testing machine, such as a scale, dial, marked or unmarked recorder chart, digital display, etc. 1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3.1 Other customary force units may be used with this standard such as the kilogram-force (kgf) which is often used with hardness testing machines
1.4 Forces indicated on displays/printouts of testing machine data systems—be they instantaneous, delayed, stored, or retransmitted—which are verified with provisions of , , or , and are within the ±1 % accuracy requirement, comply with Practices .
1.5 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.
|2. Referenced Documents|
Chcete pravidelně odebírat informace o nově vycházejících normách z celého světa a to zcela zdarma?
Přihlašte se k odběru. Vše je velice jednoduché a absolutně ZDARMA.
Na výběr máte vydavatele z celého světa.
Poslední aktualizace: 17.07.2019 (Počet položek: 2 256 802)
© Copyright 2019 NORMSERVIS s.r.o.