Vibrating element apparatus
AssigneeMobrey Limited
InventorsJeffery Allan Sears, Tadewos Tzegazeab
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Abstract
The invention provides a method of, and means for detection the condition of the fork of a vibrating fork level sensor. Changes in the normal operating frequency are compared with previous measurements and an alert generated if the change becomes significant. The method is preferably used to detect significant levels of coating build-up on the fork.
Claims14
A method of operating a vibrating element apparatus which, in use, is subject to contact and removal of contact with a fluid, said method including the steps of:
- causing a vibrating element to vibrate at an operating frequency during normal operation;
- and
- observing a change in said frequency in response to a change of environment in contact with said vibrating element, said method being characterized in that it includes:
- periodically storing measurements of said operating frequency during normal operation;
- and monitoring a change in said operating frequency.
Vibrating element apparatus which, in use, is subject to contact and removal of contact with a fluid, said apparatus including a vibrating element which vibrates at a set operating frequency during normal operation;
- and
- a processing facility operable to monitor a change in said frequency in response to a change of environment in contact with said vibrating element, said apparatus being characterized in that:
- said processing facility is further operable to periodically store measurements of said operating frequency during normal operation;
- and monitor any change in said operating frequency.
Dependencies are inferred from the claim text.