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GB/T 16825.1-2008 (GB/T16825.1-2008)

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GB/T 16825.1-2008: PDF in English (GBT 16825.1-2008)

GB/T 16825.1-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.060; 77.040.10
N 71
GB/T 16825.1-2008 / ISO 7500-1:2004
Replacing GB/T 16825.1-2002
Verification of Static Uniaxial Testing Machines – Part 1:
Tension/Compression Testing Machines – Verification and
Calibration of the Force-Measuring System
(ISO 7500-1:2004, Metallic Materials – Verification of Static Uniaxial Testing
Machines – Part 1: Tension/Compression Testing Machines – Verification and
Calibration of the Force-Measuring Systems, IDT)
ISSUED ON: JUNE 20, 2008
IMPLEMENTED ON: JANUARY 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Symbols and Their Meanings ... 6
5 General Inspection of the Testing Machine ... 6
6 Calibration of the Force-Measuring System of the Testing Machine ... 7
6.1 General ... 7
6.2 Determination of the resolution ... 8
6.3 Prior determination of the relative resolution of the force indicator... 9
6.4 Calibration procedure ... 9
6.5 Assessment of the force indicator ... 13
7 Class of Testing Machine Range ... 14
8 Verification Report ... 14
8.1 General ... 14
8.2 General information ... 15
8.3 Results of verification ... 15
9 Intervals between Verifications ... 15
Annex A (Normative) General Inspection of the Testing Machine ... 16
Annex B (Informative) Inspection of the Loading Platens of the Compression Testing
Machines ... 17
Annex C (Informative) Alternative Method of Testing Machine Classification ... 18
Annex D (Informative) Uncertainty of the Calibration Results of the Force-Measuring
System ... 19
Bibliography ... 23
Foreword
Please note some contents of this Standard may involve patents. The issuing agency of this
Standard shall not assume the responsibility to identify these patents.
GB/T 16825 Verification of Static Uniaxial Testing Machines can be divided into the following
2 parts:
--- Part 1: Tension/Compression Testing Machines – Verification and Calibration of the
Force-Measuring system;
--- Part 2: Tension Creep Testing Machines – Verification of the Applied Force.
This Part is Part 1 of GB/T 16825.
This Part equivalently adopted ISO 7500-1:2004 Metallic Materials – Verification of Static
Uniaxial Testing Machines – Part 1: Tension/Compression Testing Machines – Verification and
Calibration of the Force-Measuring System (The 3rd Version of English Edition).
For the benefit of use, the Part made the following editorial modifications:
--- Modify the name;
--- Delete the Foreword of ISO 7500-1:2004;
--- Add the Foreword of national standard;
--- Cite China’s national standards that correspond to the normative references directly;
--- Add the contents of mentioning Annexes B, C and D in the text.
This Part replaced GB/T 16825.1-2002 Verification of Static Uniaxial Testing Machines – Part
1: Tension/Compression Testing Machines – Verification and Calibration of the Force-
Measuring System.
Compared with GB/T 16825.1-2002, the major changes of this Part are as follows:
--- Change the word "force gauge" into "standard force gauge" (Clause 2 of 2002 Edition;
Clause 2 of this Edition);
--- Change the word "range" into " force-measuring range " (Clause 6 of 2002 Edition;
Clause 6 of this Edition);
--- Revise the formula for calculating the relative reversibility error [Formula (8) of 2002
Edition; Formula (8) of this Edition];
--- Revise the requirements that auxiliary devices shall meet [Formulas (6) and (7) of 2002
Edition; formulas (6) and (7) of this Edition];
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 provisions in following documents become the provisions of this Part of GB/T 16825
through reference in this Part. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Part, however, parties who reach an agreement
based on this Part are encouraged to study if the latest versions of these documents are
applicable. For undated references, the latest edition of the referenced document applies.
GB/T 13634 Metallic Materials – Calibration of Force-Measuring Instruments Used for
the Verification of Uniaxial Testing Machines (GB/T 13634-2008, ISO 376:2004, IDT)
3 Terms and Definitions
For the purposes of this Part of GB/T 16825, the following terms and definitions 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.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.