DUAL_RANGE_D_C_VOLTMETER

Published:2009/7/24 1:33:00 Author:Jessie | From:SeekIC

With switch in position 2, serves as standard 0-50 v d-c voltmeter. With switch in position 1, R1 is shunted across 50-my, 1-mc meter to allow about 3 ma through 27+, 1-w tenor diode CR1-CR2 diode 1N540 is for temperature compensation. About 27 v is then held across the diodes, and meter scale represents 27 to 32 v, with sensitivity of 0.1 v d-c per division. R3 is used for calibration.-M. W. Raybin, Dual Range DC Voltmeter, EEE, 10:12,p 31.



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