DRALLE sScale, Руководство пользователя

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C. Test Routine
1. Brief description of the system test
According to the leaflet “Photo - optical Wood Measurement” of the PTB, the following must be
checked when testing a photo-optic measuring system for wood measurement:
 Check whether the documentation allows a clear identification of the measuring instru-
ment, i.e. verification of the serial number.
 Check whether the measures to protect against manipulation of the photo-optical
measuring system for wood measurement (official calibration safety measures, for ex-
ample in the form of seals) are present and unharmed.
 Comparison of version designation and software checksum with the target values. The
version name and the software checksum are shown in the user interface A 2.2 .2 “Main
menu”.
For further information please refer to the separate documentation “Marking Conformity Rat-
ing”, which is included with the system.
Finally, it must be checked whether the measured quantity (woodpile face area) of the test
object is measured with sufficient accuracy. The testing is divided into two parts.
1) Based on reference areas (see Figure 28) on woodpiles, it is checked under conditions
that are representative of the entire area of application of the system, whether the
measurements lie within the legal calibration error limits.
For this purpose, irregular rectangles are marked according to the requirements on the
woodpile face areas and the target reference area is calculated on the basis of the
measurement of the distances of the vertices with returned test specimens. Finally, the
reference areas are measured with the test specimen.
Figure 29: Reference area of an irregular rectangle - in the rough shape of a trapezoid with corners and side
labelling. In addition the area calculation formula of the individual lengths
2) Reproducibility and measuring stability are also tested on real piles of wood. For this
purpose, the woodpile is measured several times by one person according to the in-
structions of the manufacturer and once by someone else.
The results from both tests must be within the calibration error limit.
The measurement results are recorded in a test report, where multiple copies are with the
system.