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BS 5164:1975
Current
The latest, up-to-date edition.
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Specification for indirect-acting electrical indicating and recording instruments and their accessories
Hardcopy , PDF
English
28-02-1975
Cooperating organizations
Foreword
Specification
1. Scope
2. Definitions
3. Classification
4. Permissible intrinsic errors and reference
conditions for instruments related to the
measured quantity
5. Permissible intrinsic errors and reference
conditions related to time-keeping
6. Permissible intrinsic errors and reference
conditions for accessories
7. Permissible limits of variations
8. Permissible limits of variations for accessories
9. Electrical and mechanical requirements of
instruments and accessories
10. Constructional requirements for instruments and
accessories
11. Markings and symbols for instruments and accessories
12. Categories of test
Appendix
A. Concepts
Tables
1. Limits of intrinsic error of instruments related to
the measured quantity expressed as a percentage of
the fiducial value
2. Preconditioning of instruments
3. Reference conditions for the influence quantities
related to the measured quantity
4. Additional reference conditions related to the
measured quantity for recording instruments
5. Limits of intrinsic error related to time-keeping
expressed as a percentage of the true elapsed time
6. Reference conditions for the influence quantities
related to time-keeping
7. Limits of intrinsic error of an accessory expressed
as a percentage of the fiducial value
8. Normal values of the limits of the nominal range
of use and allowable variation expressed as a
percentage of the measuring class index
9. Variation due to mounting on a ferromagnetic panel
10. Normal values of the limits of the nominal range of
use related to time-keeping
11. Value of test voltage
12. Examples of marking related to the reference
conditions and nominal ranges of use for instruments
and accessories
13. Symbols for marking instruments and accessories
14. Examples of limits of effective range and fiducial
values
Figures
1. Common mode test circuits
2. Effective range 8 A to 50 A
3. Effective range 80 V to 110 V
4. Effect of temperature
5. Effect of temperature
6. Effect of frequency
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