Exoergic resistant type hydrometry device, temperature error amendment system and amendment device

摘要

PROBLEM TO BE SOLVED: To correct readily a temperature error of a measured flow rate value by a method wherein a flow rate measured error due to a temperature change of a fluid is adjusted so as to be a constant ratio not by flow rate and measured flow rate value is corrected uniformly by a fluid temperature. ;SOLUTION: As a heat generating resistor 11 is controlled so as to increase always by a constant temperature with respect to a fluid temperature detected by a reference resistor 12, its current value is a signal corresponding to flux of a fluid. This current is replaced with a voltage by a resistor 17 and adjusted by an output characteristics adjusting circuit 14 to output a flux signal 15 to a control unit 4. Meantime, a fluid temperature detecting device 2 arranged in a fluid passage 40 outputs a voltage value at a time of supplying a resistance value per se or a constant current to a unit 4 as a temperature signal 22. The flow rate signal 15 is converted into a linear flow rate value by a flow rate convertion part 6, and further into a flow rate signal correcting a measured error due to temperature change of a fluid by a temperature correction part 3. Thereby, a flow rate value reducing the temperature error is obtained.;COPYRIGHT: (C)1999,JPO