6-4
6 Fault Diagnosis
Vibrometer
signal
Check the vibrometer signals of the front-end. To do so, proceed as follows:
Refer also to the software manual.
1. Set the 100mm/s measurement range.
2. Put a matt white test surface such as a piece of paper approximately
50cm away from the front of the scanning head in the beam path.
3. Focus the laser on the test surface.
4. Display the time signal of the vibrometer channel in an analyzer.
5. Move the test surface and check whether the output signal reacts to the
test surface moving.
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