Verification of static uniaxial testing machines - Part 1：Tension/compression testing machines - Verification and calibration of the force-measuring system
1 Scope
This part of GB/T 16825 specifies the verification of tension/compression testing machines.
The verification consists of
——a general inspection of the testing machine, including its accessories for the force application;
——a calibration of the force-measuring system.
Note: this part of GB/T 16825 addresses the static verification of the force-measuring systems. The calibration values are not necessarily valid for high-speed or dynamic testing applications. Further information regarding dynamic effects is given in the Bibliography.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 16825. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 13634 Calibration of Force-proving Instruments Used for the Verification of Uniaxial Testing Machines (GB/T 13634-2008, ISO376: 2004, Metallic Materials - Calibration of Force-proving Instruments Used for the Verification of Uniaxial Testing Machines, IDT)
3 Terms and Definitions
For the purposes of this part of GB/T 16825, the following term and definition apply.
3.1
calibration
set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring instrument or measuring system, or values represented by a material measure or a reference material, and the corresponding values realized by standards
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols and Their Meanings
5 General Inspection of the Testing Machine
6 Calibration of the Force-measuring System of the Testing Machine
6.1 General
6.2 Determination of the Resolution
6.3 Prior Determination of the Relative Resolution of the Force Indicator
6.4 Calibration Procedure
6.5 Assessment of the Force Indicator
7 Class of Testing Machine Range
8 Verification Report
8.1 General
8.2 General Information
8.3 Results of Verification
9 Intervals between Verifications
Annex A (Normative) General Inspection of the Testing Machine
Annex B (Informative) Inspection of the Loading Platens of the Compression Testing Machines
Annex C (Informative) Alternative Method of Testing Machine Classification
Annex D (Informative) Uncertainty of the Calibration Results of the Force-Measuring System
Bibliography
