Specifications
- Measuring ranges
- R 0.5 Ω – 105 MΩ; L 50 µH – 105 H; C 1 pF – 1050 µF
- Frequency range
- 50 Hz and 1 kHz internal; external up to 10 kHz
- Accuracy
- R ±(1% of reading + 0.25% of full scale) at 100 Ω – 10 MΩ; C and L ±(1.5% + 0.25%)
- Power supply
- 220 V ±10%, 50 Hz
- Power consumption
- max 10 VA
- Dimensions
- 260 × 140 × 250 mm (W × H × D)
- Weight
- 5 kg
Description
The E0704 is an RLC bridge, made by IEMI in Bucharest and designed at the ICE research institute [1].
ICE’s laboratory for electronic instruments for measuring electrical quantities designed all the institute’s generations of oscilloscopes, voltmeters, multimeters, signal generators, frequency meters, logic analysers, RLC bridges and stabilised AC power supplies; they went into production at IEMI or in ICE’s own microproduction workshop, and equipped industrial laboratories and production lines as well as teaching and research laboratories [1]. In the 1970s and 1980s about half of the components of measuring instruments were imported; after 1980 about three quarters were Romanian [1].
IEMI’s production table lists 3,672 units made in 1974–1984 [2].
Its list price, set in 1982, was 12,090 lei [3].
Annex III.2.10 details its ranges: resistance in eight decade ranges (10 Ω – 100 MΩ full scale), measured with internal direct current; capacitance in eight ranges, at 1 kHz up to 1 µF and at 50 Hz above, with an external bias of up to 10 V; inductance in six ranges (1 mH – 100 H) at 1 kHz, with external premagnetisation of up to 10 mA. All three could also be measured by comparison, within ±20% of a reference [4].
Gallery
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Schematics
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References
- [1]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, section II.4.1 „Laborator aparate electronice pentru măsurarea mărimilor electrice”, pp. 109–115
- [2]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, sections III.2 „Producția IEMI” and III.3 „Comentarii tehnico-economice”, pp. 302–317, and annex III.2.3 „Producția IEMI – aparate electronice de măsură și industriale”, pp. 383–386
- [3]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, annex III.2.5 „Lista cu prețurile produselor – IEMI”, pp. 393–396
- [4]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, annex III.2.10 „Aparate pentru măsurarea parametrilor componentelor și circuitelor”, pp. 634–646