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BS 7234-3:1990

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Heat meters Methods of test for pattern approval and initial verification
Available format(s)

Hardcopy , PDF

Superseded date

09-15-1997

Language(s)

English

Published date

03-30-1990

Foreword
Committees responsible
Method
1. Scope
2. Definitions
3. Requirements common to all tests
3.1 General rules concerning the test installations
      and their locations
3.2 Laboratory ambient conditions
3.3 Test reference conditions
3.4 Test heat-conveying liquid quality
4. Pressure tests
5. Measurement error test
5.1 Introduction
5.2 Principle
5.3 Test equipment
5.4 Method of use and precautions to be taken in using
      a test circuit for measurement error tests
5.5 Method of use and precautions to be taken in using
      a test rig for flow sensors for measurement error
      tests
5.6 Method of use and precautions to be taken in using
      test equipment for the error measurement tests of
      a calculator with temperature probes
5.7 Method of use and precautions to be taken in using
      test equipment for the error measurement tests of
      a calculator with temperature probes (calculator
      and probes deemed separable)
6. Pressure loss tests
7. Accelerated wear tests
7.1 Principle
7.2 Flow sensors with moving parts
7.3 Temperature probes
7.4 Calculators
8. Dry heat test
9. Cold test
10. Tests on the electronic devices of a heat meter
10.1 General
10.2 Tests with static deviations in the supply voltage
10.3 Tests associated with power failures or battery
      replacement
10.4 Tests with short time power reduction in the
      supply voltage
10.5 Tests with mains borne transients
10.6 Tests with transients capacitively coupled into
      the input or output signal cables of a heat meter
10.7 Tests with electrostatic discharge
10.8 Tests with electromagnetic fields
10.9 Tests with induction fields
10.10 Tests for radio frequency interference emissions
10.11 Frequency variation test
11. Electrical safety tests
12. Supplementary tests: hours-run counter
13. Test report
13.1 General rules
13.2 Pattern approval test report
13.3 Initial verification register
Appendices
A. Summary of requirements and permitted tolerances
    in the measurement of physical quantities
    associated with heat meter test methods and test
    equipment
B. Heat meter test circuit for measurement error and
    other tests
C. Heat meter flow sensor test rig for measurement
    error tests
D. Notes to test laboratories on the measurement error
    tests
Tables
1. Table of mains borne transient types
2. Test procedures and test results
3. Test conclusions
Figures
1. Waveshape of a single type 1 transient
2. General graph of a type 1 and type 2 fast transient
3. Heat meter test circuit

Test methods and means to be employed in testing heat meters in accordance with the requirements given in BS 7234:Part 1.

BS 7234-1:1990 Heat meters Specification: general requirements

BS 2011-2.1A:1977 Environmental testing. Tests Tests A. Cold
BS 5728-3:1984 Measurement of flow of cold potable water in closed conduits Methods for determining principal characteristics of single meters (including test equipment)
BS 2011-2.1B:1977 Environmental testing. Tests Tests B. Dry Heat
BS 7234-2:1990 Heat meters Specification for installation
IEC 60801-4:1988 Electromagnetic compatibility for industrial-process measurement and control equipment - Part 4: Electrical fast transient/burst requirements
BS 6667-3:1985 Electromagnetic compatibility for industrial-process measurement and control equipment Method of evaluating susceptibility to radiated electromagnetic energy
BS 6667-2:1985 Electromagnetic compatibility for industrial-process measurement and control equipment. Method of evaluating susceptibility to electrostatic discharge
BS 7234-1:1990 Heat meters Specification: general requirements

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US$237.18
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