Specification for indirect-acting electrical indicating and recording instruments and their accessories
1.1 This British Standard specifies requirements for indirect-acting electrical instruments using a null balance method which need an auxiliary electrical power supply.
These instruments may indicate the value of the measured quantity or record the value of the measured quantity as a function of time. Instruments may combine both these functions.
1.2 This standard also applies to electrically operated measuring equipments, provided that the electrically operated measuring instrument (receiver) only is considered and that the relationship between the non-electrical and the electrical quantity is known.
1.3 This standard does not apply to:
1.4 This standard does not contain requirements for protection against environmental conditions.
1.5 This standard does not specify requirements concerning dimensions of instruments or detailed requirements concerning terminal markings and diagrams of connection.
NOTE The titles of the British Standards referred to in this standard are listed on the inside back cover.
| SDO | BSI: British Standards Institution |
| Document Number | 5164 |
| Publication Date | Feb. 28, 1975 |
| Language | en - English |
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| Supercedes | |
| Committee | PEL/85 |
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