Method and device for monitoring a reference half cell
AssigneeEndress + Hauser Conducta Gesellschaft fur Mess- u. Regeltechnik mbH + Co. KG
InventorsTorsten Pechstein, Katrin Scholz, Sven Haertig
Life of this patent
Estimating the term…
Abstract
A method for monitoring a reference half cell, which forms with a measuring half cell a potentiometric measuring point for determining and/or monitoring an ion concentration of a medium. The ion concentration of the mediums determined on the basis of at least one measurement signal determined in a measuring circuit, between the measuring half cell and the reference half cell. According to the invention, the measuring point is operated intermittently in an operating mode and in a test mode, wherein, in the operating mode, the ion concentration is measured and wherein, in the test mode, the proper functioning of the reference half cell is checked.
Claims14
1-13. (canceled)
A method for monitoring a reference half cell of a measuring point also includes, a measuring half cell, for determining and/or monitoring an ion concentration of a medium, the ion concentration of the medium being determined on the basis of at least one measurement signal determined between the measuring half cell and the reference half cell, comprising the steps of:
- intermittently operating the measuring point in an operating mode and in a test mode;
- measuring the ion concentration in the operating mode;
- and
- checking the proper functioning of the reference half cell in the test mode.
An apparatus for monitoring a reference half cell of a measuring point for determining and/or monitoring an ion concentration of a medium, said measuring point also including a measuring half cell, the apparatus comprising:
- said measuring point;
- a measuring circuit located between the measuring half cell and the reference half cell;
- and
- a control/evaluation unit, which determines the ion concentration of the medium on the basis of a measurement signal determined in said measuring circuit, wherein:
- said control/evaluation unit operates the measuring point intermittently in an operating mode and in a test mode;
- and
- said control/evaluation unit determines the ion concentration of the medium in the operating mode and checks the proper functioning of the reference half cell in the test mode.
Dependencies are inferred from the claim text.