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Aviation History
1962
1962 - 1998.PDF
FLIGHT International, J3 September 1962 15 READ IT ACCURATELY — AND EASILY — TO WITHIN ± 0.25 100 v j 'SO "It, ??° I For full technical information write to: METER, RELAY AND INSTRUMENT DIVISION ST. LEONARDS WORKS STAFFORD On missile launching sites—in aircraft equip ment testing stations—in laboratories— indeed, wherever it is necessary to monitor critical voltages on electronic or similar com plex circuits, the new 'ENGLISH ELECTRIC' expanded scale voltmeter will meet the need. Its readable accuracy, to one quarter of one per cent, is greater than that of precision grade portable instruments and it is the only instrument of its kind, using static circuitry, made by a British manufacturer. Solid state components ensure long term stability. Standard voltage spans are from i 4% to ± 10% of centre scale voltage. Three grades of accuracy are available— Grade A ± 0.25% of centre scale volts at 20°C. Temperature coefficient: per °C from 0° to 40°C. ± 0.015% Grade A.T. ± 0.25% of centre scale volts at 20°C. Temperature coefficient: ± 0.0] 5% per cCfrom-40°Cto+70°C. Grade B ± 0.5% of centre scale volts at 20°C Temperature coefficient: ±0.03% per °C from 0° to 40°C. These voltmeters cover 10 standard ranges of measurement from 12V to 165V D.C. and 24V to 250V A.C. at frequencies from 50 to 400c.p.s. ENGLISH ELECTRK The English Electric Company Limited, English Electric House, Strand, London, W.C.2 *NS. S5A
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