ISO 376:2011
Metallic materials — Calibration of force-proving instruments used for the verification of uniaxial testing machines
ISO 376:2011 specifies a method for the calibration of force-proving instruments used for the static verification of uniaxial testing machines (e.g. tension/compression testing machines) and describes a procedure for the classification of these instruments.
It is applicable to force-proving instruments in which the force is determined by measuring the elastic deformation of a loaded member or a quantity which is proportional to it.
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Scope
Normative references
Terms and definitions
Symbols and their designations
Principle
Characteristics of force-proving instruments
Identification of the force-proving instrument
Application of force
Measurement of deflection
Calibration of the force-proving instrument
General
Preliminary measures
Overloading test
Verification relating to application of forces
Variable voltage test
Resolution of the indicator
Analogue scale
Digital scale
Variation of readings
Units
Minimum force
Calibration procedure
Preloading
Procedure
Loading conditions
Creep test
Determination of deflection
Assessment of the force-proving instrument
Relative reproducibility and repeatability errors, b and b(
Relative interpolation error, fc
Relative zero error, f0
Relative reversibility error, v
Relative creep error, c
Classification of the force-proving instrument
Principle of classification
Classification criteria
Calibration certificate and duration of validity
Use of calibrated force-proving instruments
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Related Information
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BS 131-1:1961
Methods for notched bar tests, The Izod impact test on metals
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BS 131-4:1972
Notched bar tests, Calibration of pendulum impact testing machines for metals
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BS 131-5:1965
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BS 131-6:1998
Notched bar tests, Method for precision determination of Charpy V-notch impact energies for metals
Scope
Normative references
Terms and definitions
Symbols and their designations
Principle
Characteristics of force-proving instruments
Identification of the force-proving instrument
Application of force
Measurement of deflection
Calibration of the force-proving instrument
General
Preliminary measures
Overloading test
Verification relating to application of forces
Variable voltage test
Resolution of the indicator
Analogue scale
Digital scale
Variation of readings
Units
Minimum force
Calibration procedure
Preloading
Procedure
Loading conditions
Creep test
Determination of deflection
Assessment of the force-proving instrument
Relative reproducibility and repeatability errors, b and b(
Relative interpolation error, fc
Relative zero error, f0
Relative reversibility error, v
Relative creep error, c
Classification of the force-proving instrument
Principle of classification
Classification criteria
Calibration certificate and duration of validity
Use of calibrated force-proving instruments