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Patent Searching and Data


Title:
VOLTAGE/RESISTANCE GENERATION MEASURING EQUIPMENT
Document Type and Number:
Japanese Patent JPH11108774
Kind Code:
A
Abstract:

To select an optional function from plurality of function with a simple switching circuit by incorporating the functions including those of resistant signal generation, resistant signal measuring, a voltage signal generation and voltage signal measuring in one device with a small number of circuit elements.

A resistance measuring current I added from a resistance measuring equipment to be calibrated is converted into a voltage V1 by a current- voltage conversion circuit 1 and inputted to a D-A converter 2. Here, assuming that a conversion coefficient set in the D-A converter 2 is K, an output voltage V0 between terminals T1 and T2 is V0=K.I.R. Because of Reg=V0 and I=K.R, optional equivalent resistance Reg is obtained between the terminals T1 and T2. By setting the conversion coefficient K of the D-A converter 2 by a microprocessor so as to generate equivalent resistance for a measuring temperature resistor in such resistance generation mode, a function as a measuring temperature resistor simulator is provided.


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Inventors:
OGUMA YOSHIO
YAMAMOTO TADASHI
Application Number:
JP26553497A
Publication Date:
April 23, 1999
Filing Date:
September 30, 1997
Export Citation:
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Assignee:
YOKOGAWA M AND C KK
International Classes:
G01K7/00; G01K15/00; G01R27/14; (IPC1-7): G01K15/00; G01K7/00; G01R27/14
Attorney, Agent or Firm:
Hirofumi Higashino