ASTM E4-08
Standard Practices for Force Verification of Testing Machines
- Standard No.
- ASTM E4-08
- Release Date
- 2008
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM E4-09
- Latest
- ASTM E4-21
- Scope
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 E 4 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 E 74
. The procedures in Practices E 4 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 18212;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 D 76
. 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 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 1.1.1, 1.1.2, or 1.1.3, and are within the ±1 % accuracy requirement, comply with Practices E 4.
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.
ASTM E4-08 Referenced Document
- ASTM D76 Standard Specification for Tensile Testing Machines for Textiles
- ASTM E467 Standard Practice for Verification of Constant Amplitude Dynamic Forces in an Axial Fatigue Testing System
- ASTM E74 Standard Practices for Calibration and Verification for Force-Measuring Instruments
ASTM E4-08 history
- 2021 ASTM E4-21 Standard Practices for Force Verification of Testing Machines
- 2020 ASTM E4-20 Standard Practices for Force Verification of Testing Machines
- 2016 ASTM E4-16 Standard Practices for Force Verification of Testing Machines
- 2015 ASTM E4-15 Standard Practices for Force Verification of Testing Machines
- 2014 ASTM E4-14 Standard Practices for Force Verification of Testing Machines
- 2013 ASTM E4-13 Standard Practices for Force Verification of Testing Machines
- 2010 ASTM E4-10 Standard Practices for Force Verification of Testing Machines
- 2009 ASTM E4-09a Standard Practices for Force Verification of Testing Machines
- 2009 ASTM E4-09 Standard Practices for Force Verification of Testing Machines
- 2008 ASTM E4-08 Standard Practices for Force Verification of Testing Machines
- 2007 ASTM E4-07 Standard Practices for Force Verification of Testing Machines
- 2003 ASTM E4-03 Standard Practices for Force Verification of Testing Machines
- 2002 ASTM E4-02 Standard Practices for Force Verification of Testing Machines
- 2001 ASTM E4-01 Standard Practices for Force Verification of Testing Machines
- 1999 ASTM E4-99 Standard Practices for Force Verification of Testing Machines
- 1979 ASTM E4-79 Standard Methods of Load Verification Of Testing Machines
