Vibration Amplifier for Jet Engine and Aircraft Auxiliary Power Unit Measurements

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A microprocessor-based vibration amplifier is designed to condition and display rotating machinery data while offering simultaneous outputs as broadband, acceleration, velocity and displacement. The Endevco 6634C from Meggitt Sensing Systems is designed to accept inputs from a single-ended, differential piezoelectric or ISOTRON (IEPE) accelerometer, velocity coil or remote charge converter. Full-scale AC and DC output ranges, as well as sensitivity, are user programmable in selectable engineering units and are representative of acceleration, velocity or displacement. Programming is accomplished from the front panel keyboard or optional RS-232 computer interface. Units also have an optional six-pole filter, which may be programmed from the front panel. Up to ten unique setups can be stored and recalled from the non-volatile memory, while two TTL- compatible latched alarm outputs provide both warning and alert functions. An optional 19-inch mounting rack, also available from Meggitt Sensing Systems, can accommodate up to six units.

With its versatility to accept and condition multiple transducer output types, the Endevco 6634C vibration amplifier is suitable for the turbine and generator health monitoring of jet engines, generators, turbines and pumps. They are also well-suited for aerospace engine test cell applications, which further incorporate the use of high-temperature accelerometers, or where vibration data is required to be expressed in terms of velocity. These rugged units may also be used with other balanced differential output devices. Additional applications include fixed and mobile test cells for small turbofans, air cyclers, as well as in-laboratory test rigs.

Meggitt Sensing Systems
Fribourg, Switzerland
+41 26 407 11 11