INSPECTION AND MAINTENANCE

4.1C

Maintenance of the transducer consists of periodic inspection to determine that the internal parts have

not been subjected to fouling or corrosion.

For close examination of internal parts, the support assembly may be withdrawn from the housing

through either end of the transducer, after first removing the retainer ring. The meter calibration will not be

affected by removing and re-installing the original support assembly.

Should the assembly be damaged in any fashion, it should be returned to the USAMCC for disposition.

The support assembly or meter itself may be cleaned with cleaning solvent or alcohol. If the transducer is to be

stored or out of service for a considerable length of time, it may first be dipped in light rust preservation or

maching oil (caution should be observed if the transducer is later intended for special service such as LOX). The

transducer should be located upstream of all final control elements. The transducer should never be installed in

such a fashion that when flow ceases the transducer completely drains. Serious damage can be caused by

striking a dry transducer with a high velocity fluid stream. The transducer is literally insensitive to damage

caused by fluid velocity or hydraulic shock, if it is kept full of fluid at all times. For this reason, all by-pass,

throttling, or on/off valves must be located downstream from the transducer.

Care should be taken not to locate the transducer or connector cable in close proximity to strong electro-

magnetic fields such as electric motors, transformers, sparking devices or high voltage lines, as these may

induce noise voltages in the flowmeter coil.

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