Laboratory standard a.c. and d.c. (electrodynamometer) voltmeter with 12 inch scale, model S.92 No. W91609, by Sangamo Weston Ltd., Enfield, Middlesex, England. Switched 75V, 100V and 300V ranges 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 10 March 1953
Details
- Category:
- Electricity and Magnetism
- Object Number:
- 1989-1180
- type:
- voltmeter
- credit:
- Imperial College of Science, Technology & Medicine