Direct-contact tester RO 7000

sensorindustrialmultifunction

Rotating machinery is being monitored to secure the availability. For rotors with anti-friction bearings the housing or pedestal vibrations will be used for monitoring (ISO 10816). For rotors running in sleeve bearings the relative shaft vibrations will be monitored (ISO 7919, API). To measure the relative shaft vibrations eddy current sensors will be applied (for example Hofmann type WSG). Those sensors measure the lateral shaft movement in an axial rotor plane close to a bearing plane. The measuring signal of the eddy current sensors will be influenced by deviations from the ideal circular geometry of the respective rotor plane (mechanical runout) and by residual magnetism and variations of the shaft material properties (electrical runout). Such deviations simulate a vibration. Therefore the montioned deviations must not exceed certain limit values.