Start To Measure From Home Screen; How The Laser Trigger Rpm Sensor Works; Measure Rpm With The Stroboscope - Fluke VIBXPERT 3 User Manual

On-board help
If absolute mode was selected, the speed point is independent and must be measured
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using the laser trigger RPM sensor (Keyphasor method). This method is described in the
RPM Sensor VIB 6.631 Installation and Operation instructions.

Start to measure from home screen

Tap the home screen Speed measurement icon.
From this screen, the machine speed can be measured with the laser trigger sensor.

How the laser trigger RPM sensor works

The sensor detects the signals optically. There is no physical contact to the rotating machine.
Red laser light is emitted from the sensor head and strikes a measure mark on the rotating
shaft. The mark can amplify light (e.g. reflective film or attenuate light (black, high contrast
line on a bright surface). Each time the sensor detects a difference in brightness, it sends an
electric impulse. VIBXPERT 3 calculates the shaft speed based on the repeat rate of the pulses.

Measure RPM with the stroboscope

The stroboscope is used to:
Verify the calculated RPM. This RPM is calculated using the speed finder which is turned
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on in settings .
WARNING:When using the stroboscope, obey the safety instructions.
70 Version:1.0