BS 7234-1:1990
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Heat meters Specification: general requirements
Hardcopy , PDF
15-09-1997
English
30-03-1990
Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Technical characteristics
3.1 Design
3.2 Meter size and dimensions
3.3 Working parameters
3.4 Indicating device
3.5 Supplementary indicating devices
3.6 Materials and construction
3.7 Heat meter power supplies and the use of batteries
3.8 Electrical performance and safety requirements
3.9 Strainers
3.10 Protection against fraud
3.11 Marking
3.12 Storage conditions
4. Metrological characteristics
4.1 Metrological classes
4.2 Maximum permissible errors
5. Pressure loss
6. Compliance criteria and testing
6.1 Compliance criteria
6.2 Principles for the measurement error testing of
combined heat meters
6.3 Principles for the measurement error testing of
complete heat meters
7. Pattern approval
7.1 Procedure
7.2 Pattern approval tests
7.3 Certificate of pattern approval
8. Initial verification
8.1 Procedure
8.2 Initial verification tests
Tables
1. Table of threaded end connections: range of sizes
and thread lengths
2. Table of maximum permissible errors +/- E of heat
meters
3. Table of mains borne transient types
Figures
1. Length of threaded connection and clearance length
2. Waveshape of a single type 1 transient
3. General graph of a type 1 and type 2 fast transient
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