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ID number:  BIRRC-P0570
Institution:  Research and Cultural Collections
Named collection:  Historic Physics Collection
Artist / Maker:  The General Electric Co. Ltd.
Title / Object name:  A.C. Volt and Wattmeter
Object type:  Electrical instrument
Place made:  Salford
Date made:  c. 1909
Materials:  Various in wooden case
Measurements:  32.5 x 26.5 x 15 cm

This is an electrodynamometer type instrument for use at 50 Hz with a linear scale of Watts and non-linear scale of Volts up to 100 or 200V. The power measurement requires the use of a quadrature transformer. Instructions and a calibration certificate are in the lid. These are dated 1 Sept. 1909 and give the instrument serial number as 162W.

Inscriptions / Translations:  PORTABLE STANDARD WATTMETER
No 24605 1904

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