BS ISO 7278-4:1999

1 Scope
2 Normative references
3 Principles
    3.1 Ways of expressing a meter's performance
    3.2 How meter performance varies
    3.3 Correction factors
4 Meters and provers
    4.1 Pulse-generating meters
    4.2 Sources of error in operating meters
    4.3 Pulse interpolators
    4.4 Conventional pipe provers
    4.5 Small volume pipe provers
    4.6 Methods of installing pipe provers
    4.7 Sources of error in operating pipe provers
    4.8 Prover calibration and recalibration
    4.9 Meter installations
5 Safety requirements
    5.1 General
    5.2 Permits
    5.3 Mechanical safety
    5.4 Electrical safety
    5.5 Fire precautions
    5.6 Miscellaneous safety precautions
    5.7 Records
6 Operating a pipe prover
    6.1 Setting up a portable prover
    6.2 Warming up provers
    6.3 Periodical checks of factors affecting accuracy
    6.4 The actual proving operation
    6.5 Assessment of the results
    6.6 Fault finding
Annex A (informative) Bibliography

Gives guidance for operation of pipe provers for proving turbine and displacement meters. Applicable both to the kind of pipe prover defined in ISO 7278-2, known as "conventional pipe provers" and to other kinds, known as "compact pipe provers" or "small volume provers". Intended to be used as a reference manual for operating pipe provers, and also for staff training. Does not include the detailed differences between provers of broadly similar kinds made by different manufacturers.

This part of ISO7278 provides guidance on operating pipe provers to prove turbine meters and displacement meters. It applies both to the types of pipe prover specified in ISO7278-2, which are referred to here as \'conventional pipe provers\', and to other types referred to here as \'compact pipe provers\' or \'small volume provers\'.

It is intended for use as a reference manual for the operation of pipe provers, and also for use in staff training. It does not cover the detailed differences between provers of broadly similar types made by different manufacturers.