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Description: | Laboratory standard a.c. and d.c. (electrodynamometer) voltmeter with 12 inch scale, model S.93 No. AA4210, by Sangamo Weston Ltd., Enfield, Middlesex, England. Ranges 1A and 2A selected by metal links, accurate to 0.1% of full scale. Fitted with levelling feet and built-in spirit level and mercury thermometer. With connecting leads, and printed calibration certificate dated 24 January 1952 | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Temporal: | 1952 | Source: | Science Museum | Creator: | Sangamo Weston (maker) | Identifier: | 1989-1179 | Go to resource |
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