Title:
CONTROL UNIT, AND CONTROL DEVICE COMPRISING SAID CONTROL UNIT
Document Type and Number:
WIPO Patent Application WO2005057134
Kind Code:
A3
Abstract:
Disclosed is a control device comprising a control unit and an evaluation unit that is configured so as to generate a control signal by which the control unit is impinged upon. The control unit (1) is provided with a voltage source (15) and a reference resistor (Rref) that can be connected in series to a sensor resistor (Rsens) whose value depends on the temperature thereof. The output voltage of the voltage source (15) drops on the sensor resistor (Rsens) and the reference resistor (Rref) in the connected state. The reference resistor (Rref) is dimensioned in such a way that the maximum power loss of the sensor resistor (Rsens) lies in the specified value range of the sensor resistor (Rsens).
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| WO/2010/066798 | CONDUCTIVITY METER AND LIQUID TREATMENT DEVICE |
Inventors:
BOLZ STEPHAN (DE)
Application Number:
PCT/EP2004/053317
Publication Date:
November 17, 2005
Filing Date:
December 07, 2004
Export Citation:
Assignee:
SIEMENS AG (DE)
BOLZ STEPHAN (DE)
BOLZ STEPHAN (DE)
International Classes:
G01F23/24; G05F3/08; (IPC1-7): G01F23/24; G05F3/08
Domestic Patent References:
| WO1991008441A1 | 1991-06-13 |
Foreign References:
| US4825383A | 1989-04-25 | |||
| DE19526350A1 | 1997-01-23 | |||
| DE3237396A1 | 1983-04-28 | |||
| DE3134912A1 | 1983-03-17 |
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