Specification for electrical measuring instruments for use on intrinsically safe circuits in coal mines
This British Standard specifies limiting parameters for input/output circuits of portable electrical measuring instruments for testing intrinsically safe circuits used in coal mines. It applies to the following types of test circuits when connected to intrinsically safe circuits having a voltage not exceeding 60 V peak at the point of test.
This standard is not applicable to intrinsically safe instruments that provide a high voltage for testing insulation nor to instruments used to measure the resistance or continuity of shot-firing circuits. Nor does it specify operational performance requirements of testing instruments.
Instruments specified in this standard are intended for use in accordance with BS 6704 and with any condition of the applicable certification to either the instrument or the circuit to which it is connected for test purposes.
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
| SDO | BSI: British Standards Institution |
| Document Number | 6705 |
| Publication Date | Aug. 28, 1987 |
| Language | en - English |
| Page Count | 4 |
| Revision Level | |
| Supercedes | |
| Committee | W/- |