Variable area flowmeter, system comprising a variable area flowmeter and an external control unit, and method for operating a variable area flowmeter
AssigneeKROHNE Messtechnik GmbH
InventorColin Dzieia
Life of this patent
Estimating the term…
Abstract
A variable area flowmeter having a float and having a display unit, the display unit includes a pointer element, the pointer element is connected directly or indirectly to the float such that the pointer element is mechanically deflected by the float during the measuring process. The variable area flowmeter that operates particularly reliably and is flexibly applicable at the same time is achieved in that the display unit comprises at least one bi-stable display which only requires an energy supply in order to modify the displayed representation and/or to restore the representation.
Claims12
A variable area flowmeter, comprising:
- a float;
- and
- a display unit, wherein the display unit comprises a mechanical pointer element,
- wherein the pointer element is connected directly or indirectly to the float such that the pointer element is mechanically deflected by the float during a flow measuring process,
- wherein the display unit additionally comprises at least one bi-stable display, requiring energy supply only in order to modify a displayed representation or to restore the displayed representation, and
- wherein the at least one bi-stable display displays a first representation during operation, wherein the first representation comprises at least one scale dependent on the flow measuring range,
- wherein the displayed scale is modified depending on at least one further process parameter being measured, wherein the further process parameter is at least one of pressure, temperature, or type of measuring medium.
A method for operating a variable area flowmeter, comprising:
- altering a representation of a bi-stable display of a display unit at least partially, depending on at least one process parameter, by an internal control unit or an external control unit, wherein the display unit comprises a pointer element;
- and
- deflecting mechanically the pointer element by the variable area flowmeter during a flow measuring process,
- wherein the pointer element is connected directly or indirectly to a float for the pointer element to be deflected mechanically by the variable area flowmeter during the flow measuring process,
- wherein the bi-stable display requires energy supply only for changing the representation or for restoring the representation,
- wherein the at least one bi-stable display displays a first representation during operation, wherein the first representation comprises at least one scale dependent on the flow measuring range, and
- wherein the displayed scale is modified depending on the further process parameter being measured, wherein the further process parameter is at least one of pressure, temperature, or type of measuring medium.
Dependencies are inferred from the claim text.