E0402

The E0402 is an electronic millivoltmeter, 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].

It measures AC voltage from 10 Hz to 10 MHz; the later E0402 M extends the range to 20 MHz [2]. IEMI’s production table lists 3,315 units made in 1977–1985 [2].

Its list price, set in 1982, was 6,500 lei [3].

Annex III.2.8 gives the E0402 a range of 10 µV – 300 V. Its table of characteristics covers only the E0402 M: 0.1 mV – 300 V in five ranges, 10 Hz – 20 MHz, an error within ±(5% of reading + 3% of full scale), an input impedance of 10 MΩ ∥ 40 pF, 8 VA, 24 × 17 × 24 cm (H × W × D) and 4.8 kg [4].