Section 313-01: Detecting and indicating instruments | ![](/icons/ecblank.gif) |
| 313-01-11 | | insulation resistance meter | ![](/icons/ecblank.gif) |
| 313-01-23 | | insulation fault detecting instrument | ![](/icons/ecblank.gif) |
| 313-01-29 | | magnetic detector for lightning currents | ![](/icons/ecblank.gif) |
Section 313-02: Recorders | ![](/icons/ecblank.gif) |
| 313-02-15 | | (analogue) magnetic recorder | ![](/icons/ecblank.gif) |
Section 313-03: Transducers | ![](/icons/ecblank.gif) |
| 313-03-01 | | (electrical measuring) transducer | ![](/icons/ecblank.gif) |
| 313-03-05 | | reactive power transducer | ![](/icons/ecblank.gif) |
| 313-03-10 | | transducer with offset zero | ![](/icons/ecblank.gif) |
| 313-03-11 | | transducer with suppressed zero | ![](/icons/ecblank.gif) |
| 313-03-12 | | single element transducer | ![](/icons/ecblank.gif) |
Section 313-04: Stabilized power supplies | ![](/icons/ecblank.gif) |
| 313-04-01 | | constant voltage power supply | ![](/icons/ecblank.gif) |
| 313-04-02 | | constant current power supply | ![](/icons/ecblank.gif) |
| 313-04-03 | | constant voltage/constant current power supply | ![](/icons/ecblank.gif) |
Section 313-05: Oscilloscopes | ![](/icons/ecblank.gif) |
| 313-05-01 | | (electron beam) oscilloscope | ![](/icons/ecblank.gif) |
Section 313-06: Energy meters | ![](/icons/ecblank.gif) |
| 313-06-08 | | meter with maximum demand indicator | ![](/icons/ecblank.gif) |
Section 313-07: Signal generators | ![](/icons/ecblank.gif) |
| 313-07-01 | | amplitude modulated signal generator | ![](/icons/ecblank.gif) |
| 313-07-02 | | frequency modulated signal generator | ![](/icons/ecblank.gif) |
Section 313-08: Measuring bridges | ![](/icons/ecblank.gif) |
Section 313-09: Accessories | ![](/icons/ecblank.gif) |
| 313-09-01 | | interchangeable accessory | ![](/icons/ecblank.gif) |
| 313-09-02 | | accessory of limited interchangeability | ![](/icons/ecblank.gif) |
| 313-09-03 | | non-interchangeable accessory | ![](/icons/ecblank.gif) |
| 313-09-10 | | calibrated instrument lead | ![](/icons/ecblank.gif) |