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Content
Content (en)
Foreword
Introduction
Scope
Normative references
Terms and definitions
Symbols and units
Test installation
Test circuit for discharge test
Test circuit for charge test
General requirements
Requirements for the tank (item 4)
Structure
Stuffed material
Volume
Special requirements
Test procedures
Test conditions
Test fluid
Checks
Test measurements
Measuring procedures
Requirements for testing to publish catalogue ratings
Selection of measuring procedure
Measuring procedures for discharge test
Measuring procedures for charge test (see Figure 2)
Calculation of characteristics
Sonic conductance, C
Smoothing of pressure in the tank, p
Conductance characteristics curve
Calculation of sonic conductance, C
Critical back-pressure ratio, b, and subsonic index, m
Pressure dependence coefficient, K
Presentation of test results
Identification statement (reference to this document)
Evaluation of measurement uncertainty (informative)
General
Evaluation of measurement uncertainty of the sonic conductance, C, using Type B
Measurand conductance, C
Identification of uncertainty of input quantities
Sensitivity coefficient
Expression of absolute standard uncertainty
Evaluation of measurement uncertainty of the sonic conductance, C, using Type A
Measurand sonic conductance, C
Expression of standard uncertainty
Evaluation of measurement uncertainty of the critical back-pressure ratio, b, and subsonic index, m, using Type B
Measurands
Identification and expression of uncertainty
Repeatability and reproducibility
Practical uncertainty due to tank volume
Practical uncertainty due to temperature
Error due to transient change of temperature
Test method to determine and calibrate the volume of an isothermal tank (normative)
Test circuit
General requirements
Measurement procedures
Calculation of tank volume
Evaluation of measurement uncertainty of the volume of isothermal tank (Type B of the GUM)
Measurand volume V
Identification of uncertainty of input quantities
Sensitivity coefficient
Expression of absolute standard uncertainty
Example of test result
Isothermal tank stuffing (informative)
General
Mass density and isothermal performance of stuffed material
Stuffed material
Test method to determine isothermal performance (informative)
Purpose
Test circuit
Test procedure
Confirmation of isothermalization
Formulae for calculation of flow-rate characteristics (informative)
Formulae for discharge test
Calculation model
Calculation of mass flow rate, q
Calculation of critical back-pressure ratio, b, and subsonic index, m
Formulae for charge test
Calculation model
Calculation of mass flow rate, q
Calculation of critical back-pressure ratio, b, and subsonic index, m
Procedures for calculating critical back-pressure ratio, b, and subsonic index, m, by the least-square method using the Solver function in Microsoft Excel® (informative)
Using data in the subsonic flow region
Using the Solver function built in Microsoft Excel
Function
Calculation of critical back-pressure ratio, b, and subsonic index, m
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