Method for detecting a differential pressure
First Claim
1. A method for correcting a pressure value in a level sensor of a submersible pump wherein there is provided a pressure sensor serving as said level sensor and at one point in time as a first pressure value the pressure of the surroundings is detected by said pressure sensor and at another point in time as a second pressure value the pressure of the fluid to be delivered by the pump is detected by said pressure sensor, and wherein said second pressure value is corrected on basis at said first pressure value by evaluating the pressure difference between the second and first pressure value.
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Abstract
The invention relates to a method for detecting a differential pressure or for correcting a pressure value detected in the fluid on the basis of a pressure of a surrounding medium, wherein at a first point in time the pressure of the surrounding medium is detected and at a later, second point in time the pressure of the fluid is detected, and the pressure value detected in the fluid is corrected on the basis of the pressure of the surrounding medium. The invention furthermore relates to a pump system with a level sensor in which this method is applied, as well as to the use of a pressure sensor in such a pump system.
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Citations
19 Claims
- 1. A method for correcting a pressure value in a level sensor of a submersible pump wherein there is provided a pressure sensor serving as said level sensor and at one point in time as a first pressure value the pressure of the surroundings is detected by said pressure sensor and at another point in time as a second pressure value the pressure of the fluid to be delivered by the pump is detected by said pressure sensor, and wherein said second pressure value is corrected on basis at said first pressure value by evaluating the pressure difference between the second and first pressure value.
- 15. A submersible pump system with a fluid level sensor which comprises a pressure sensor for determining an absolute pressure, and control means which switches the pump on and/or off in dependence on the readings of the fluid level sensor, wherein the pump comprises a calibration means for correcting a second pressure value detected in a fluid on the basis of a first pressure value detected in the surroundings, wherein at one point in time said pressure sensor detects said first pressure value and at another point in time detects said second pressure value, and wherein said second pressure value is corrected on the basis of the first pressure value by evaluating the pressure difference between said second pressure value and said first pressure value.
Specification