If the laser beam is emitted but there is If the laser beam is emitted but there is no velocity signal, check the following:no velocity signal, check the following:
1.1. Is tIs the Phe PSV cSV correcorrectly ctly cabled abled as deas descriscribed ibed innsec
sectiotionn 3.43.4.2.2??
2.2. Put a maPut a matt whitt white test ste test surfaurface succe such as a piece of ph as a piece of paper at apaper at approxproximatimatelyely
2020 cm from the front panel of the scanning head in the beam path. Doescm from the front panel of the scanning head in the beam path. Does
the signal level display react?the signal level display react?
Check the correct function of the data acquisition board and the software asCheck the correct function of the data acquisition board and the software as
follows:follows:
3.3. DiscDisconneconnect the BNC cat the BNC cable for the velble for the velocitocity signay signal from the BNl from the BNC jack VEC jack VELOLO
on the front of the junction box.on the front of the junction box.
4.4. Feed tFeed the signhe signal of a fual of a functinction geneon generator trator to this Bo this BNC jacNC jack.k.
5.5. DispDisplay the tilay the time signme signal in an analyal in an analyzer as deszer as describcribed in your sed in your softoftwareware
manual.manual.
Now check the output signal of Now check the output signal of the controller as follows:the controller as follows:
6.6. Re-cRe-conneconnect the velot the velocity scity signaignal to the BNl to the BNC jack VC jack VELO on tELO on the front ohe front of thef the
juncjunction tion box.box.
7.7. DispDisplay the tlay the time sigime signal in an ananal in an analyzelyzer as descr as described in yribed in your sofour softwartwaree
manual.manual.
88.. SSeet tt thhe me meeasasurureemmenent rt ranange ge tto 1o 100 . D. Dooes es tthe he ououtptput ut ssigignnal al rereacact tt too
the test surface movthe test surface movinging??
9.9. If the outIf the output sigput signal does nonal does not reactt react, check w, check whethehether a signifr a significant Dicant DC offsC offset iset is
present.present.
10.10. Block the laser beam. Is thBlock the laser beam. Is the output signal noisy or is a straight linee output signal noisy or is a straight line
shown?shown?
mmmm
ss
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