However while the magnet is still operating properly it, like all magnets, attracts other ferrous metals. With the loss of alignment the magnet loses its magnetic power. Eventually the electrons move and return to their original locations according to the laws of physics. A magnet is nothing more than a piece of steel within which all of the electrons, sub-atomic particles, have been aligned within a specific pattern. The frame of the meter movement is a large magnet. Eventually the glass will become rough and will need to be re-ground or replaced. The glass also becomes worn from the pivot constantly rotating within it. Glass is fragile it breaks very easily when mishandled. It needs to be sharpened or replaced.Īs previously stated, a jewel is nothing more than a finely ground miniature glass cup. Eventually the pivot will become so worn that it can no longer rotate easily. Over time and with constant movement the ends of the pivot will begin to wear down similar to the point on a pencil. A jewel is a finely ground glass cup within which the ends of the pivot are supported and allowed to rotate. The frame is in fact a large powerful magnet.Īs electrical current flows through the wire spool it interacts with the magnetic field of the frame causing the spool to rotate on its pivot and jewel.Ī pivot is nothing more than a miniature axle. A meter movement consists of a spool of wire mounted on a pivot and jewel housed within a frame. Typical Failures in Resistive Fuel Quantity SystemsĪs previously stated the indicator in this type of system is quite simple, typically nothing more than a meter movement mounted within a case.
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