Title:
ELECTRIC POWER MEASURING INSTRUMENT
Document Type and Number:
Japanese Patent JP3896775
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electric power measuring instrument capable of suppressing the temporal slippage of a synchronous measurement in the synchronous measurement by use of a plurality of power measuring instruments and performing the synchronous measurement without requiring the preparation of external measurement start signals for the number of the power measuring instruments by a measuring person.
SOLUTION: This power measuring instrument capable of starting the electric power measurement of a signal to be measured with an external signal as measurement start timing comprises an internal measurement starts signal generating circuit for generating a signal forming the start timing of the electric power measurement; an external signal input means for receiving the external signal; a selector for generating the measurement starts signal by selectively outputting the signals of the internal measurement start signal generating circuit and the external signal input means; an internal measurement end signal generating circuit for forming a measurement end signal forming the end timing of the power measurement; an arithmetic circuit for calculating the power value of the measuring signal during the period from the output of the measurement start signal to the output of the measurement end signal; an external signal output means for outputting the measurement start signal to the outside; and a control circuit for controlling the whole device.
Inventors:
Hisashi Iwase
Toshiaki Shioda
Toshiaki Shioda
Application Number:
JP2000243960A
Publication Date:
March 22, 2007
Filing Date:
August 11, 2000
Export Citation:
Assignee:
Yokogawa Electric Corporation
International Classes:
G01R21/133; (IPC1-7): G01R21/133
Domestic Patent References:
| JP2305028A |