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ASTM E4-13
Standard Practices for Force Verification of Testing Machines
Automaticky preložený názov:
Štandardné postupy pre Force overovanie skúšobných strojov
NORMA vydaná dňa 1.4.2013
Informácie o norme:
Označenie normy: ASTM E4-13
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.4.2013
Kód tovaru: NS-46677
Počet strán: 10
Približná hmotnosť: 30 g (0.07 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Anotácia textu normy ASTM E4-13 :
Keywords:
calibration, force range, resolution, verification, ICS Number Code 19.060 (Mechanical testing)
Doplňujúce informácie
| Significance and Use | ||||||||
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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 the amount of force that is applied and indicated, and that the accuracy of the force is traceable to the National Institute of Standards and Technology (NIST), formerly NBS. Practices E4 provides a procedure to verify these machines, in order that the indicated forces may be traceable. A key element to this NIST traceability is that the devices used in the verification have known force characteristics, and have been calibrated in accordance with Practice E74. 4.2 The procedures in Practices E4 may be used by those using, manufacturing, and providing calibration service for testing machines and related instrumentation. |
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| 1. Scope | ||||||||
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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. 1.2 The procedures of 1.1.1-1.1.3 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. In all cases the
buyer/owner/user must designate the force-indicating system(s) to
be verified and included in the report.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3.1 Since conversion factors are not required in this practice, either inch-pound units, SI units, or metric values can be used as the standard. 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 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. |
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| 2. Referenced Documents | ||||||||
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