Single-phase portable a.c. and d.c. wattmeter

Single-phase portable a.c. and d.c. wattmeter, model 310 form 2 serial no.5622, by the Weston Electrical Instrument Corp., N.J., U.S.A., calibration certificate dated 1926

Details

Category:
Electricity and Magnetism
Object Number:
1987-433
type:
wattmeter
credit:
South Bank Polytechnic. Dept. of Electri