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Patent Searching and Data


Title:
START AND INSPECTION SYSTEM FOR ELECTRONIC WATER METER
Document Type and Number:
Japanese Patent JPS6220498
Kind Code:
A
Abstract:

PURPOSE: To reduce the influence of external noises greatly by changing a voltage interface which starts a meter by a voltage and makes a logical voltage response by impedance variation into a current interface through a conversion adapter.

CONSTITUTION: When the meter is started, the start relay 21 of a meter start terminal equipment 2 is operated and a start voltage 26 is supplied to the meter start relay 9 of the conversion adapter 1. A start relay contact 8 is made and the electronic water meter 3 beings to output meter inspection data 28. The serial binary output meter inspection data satisfies the polarity logic of a mark signal 27, the meter inspection data 28, and a space signal 29. The logical voltage is supplied to the meter inspection data output driving relay 10 of the conversion adapter 1. For the mark signal 27, a driving relay contact 11 has break contact logic 30 on a driving repeating cable 6 and a relay contact 18 is still made. For the space signal 29, make contact logic 31 is obtained on the driving repeating cable 6 and the relay contact 18 is broken.


Inventors:
ONISHI YOSHIO
Application Number:
JP15802385A
Publication Date:
January 29, 1987
Filing Date:
July 19, 1985
Export Citation:
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Assignee:
NEC CORP
International Classes:
H04L25/02; G08C19/00; H04Q9/00; (IPC1-7): G08C19/00; H04L25/02; H04Q9/00
Attorney, Agent or Firm:
Yoshiyuki Iwasa