Polytec PSV-500-3D, Руководство по эксплуатации

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6-5
6 Troubleshooting
INFORMATION
In the Ref column, the boxes for the Vibrometer Top , Vibrometer Left and
Vibrometer Right channels must not be ticked.
You can now check the function of each of the scanning heads
independently of each other.
9. Put a matt white test surface such as a piece of paper approximately
50 cm away from the front panel of the
TOP
scanning head in the beam
path.
10. Focus the laser on the test surface. Does the signal level display react to
focusing ?
If the signal level display does not react, the scanning head is defective.
11. Repeat step 9 and step 10 for
LEFT
and
RIGHT
scanning heads.
Data acquisition Check the correct operation of the data acquisition and the software. To do
so, proceed as follows:
1. Connect up the signal output of a function generator to the
REF1
reference channel.
2. Display the time signal of the reference channel in an analyzer as
described in your software manual.
The data acquisition and the software work properly if the signal of the
function generator is displayed correctly. In this case there is a problem
in the front-end.
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 50 mm/s measurement range and a bandwidth of 10 kHz.
2. Put a matt white test surface such as a piece of paper approximately
50 cm away from the front panel of the
TOP
scanning head in the beam
path.
3. Focus the laser on the test surface.
4. Display the time signal of the
Top vibrometer channel in an analyzer.
5. Move the test surface and check whether the output signal reacts to the
test surface moving.
6. Repeat steps 2 to 5 for
LEFT
and
RIGHT
scanning heads.