PRECITEC CHRocodile C, Operation Manual, Page: 34 / 63

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• Measuring Rate: Instead of adjusting intensity or in addition to LED intensity adjustment, it is
also possible to adjust the measuring rate. The measuring rate is related to data transmission
frequency. The CHRocodile C maximum measuring rate is 4KHz. The higher the measuring
rate is the lower the signal intensity is. Consequently, depending on the object reflectivity
under measurement, the measuring rate (measuring frequency) must be adjusted in order to
remove saturation or too low intensity signal. In order to adjust measuring frequency, use the
SHZ command (Cf. Appendix 1).
4.5 Data measurement Training
When mechanical interfacing is done, the object to be measured must be positioned inside the
measuring range of the CHRocodile C optical probe.
This procedure is valid for altitude and thickness measurement, i.e. to perform topographic
measurement on reflecting object or to perform thickness measurement on transparent object.
Measuring altitude procedure consists in:
- Adjusting the axial position of the target in order the target is centered inside the optical
sensor measuring range. To do this, one can move the optical probe or the target along the
optical axis. Thus, it is recommended to fix the optical probe or the target on a translation
plate.
- Adjusting the spot on the area to be measured.
Fig 4-5: Axial position adjustment
When the target is correctly positioned in front of the optical head and basic configuration is
correctly set, it is possible to collect the needed data using the SODX command (Cf. Appendix 1).
Translation plate
Target
Translation plate
Target