Title:
ELECTRONIC INTEGRATING FLOWMETER
Document Type and Number:
Japanese Patent JP3210786
Kind Code:
B2
Abstract:
PURPOSE: To check the battery voltage positively while reducing power consumption and the size of battery by a constitution wherein the characteristics of a nonvolatile memory writing circuit are equalized to the load characteristics for detecting the battery voltage drop.
CONSTITUTION: A memory circuit 3 and an operating circuit 7 are connected in parallel with a control circuit 2 and the characteristics of a nonvolatile memory writing circuit 4 are equalized to the load characteristics for detecting the battery voltage drop. Normally, the circuit 3 is not used and a current flows only through the circuit 7. A flow rate operating circuit 8 operates the flow rate which is then accumulated and held in a nonvolatile memory. It is updated every time when the flow rate is accumulated. On the other hand, a current flows periodically through the circuit 3 and accumulated in the circuit 4. A voltage drop check circuit 6 checks the voltage every time the current is accumulated and when the checked voltage is higher than a predetermined level, the accumulation is continued otherwise an alarm is delivered.
Inventors:
Ikko Nukui
Katsuhito Sakai
Katsuhito Sakai
Application Number:
JP24551493A
Publication Date:
September 17, 2001
Filing Date:
September 30, 1993
Export Citation:
Assignee:
Tokyo Gas Co., Ltd.
International Classes:
G01F15/06; G01D9/00; G01F1/00; G01F15/075; (IPC1-7): G01F1/00; G01D9/00; G01F15/06
Domestic Patent References:
| JP6042921U |
Attorney, Agent or Firm:
Hiroshi Ohashi