Page 52
6.3 Calibration
Each time the measuring head is mounted on the vehicle it should be calibrated, at
least once a day. Calibration means that the ZDR 6020 is compared to a reference
calibration standard with a known R
L
value. The deviation between the measured
and the reference values should not exceed 5 %.
Calibrating the system correctly is essential to get good measuring results.
Use a flat and even spot for calibration.
Make sure you use the same marking presetting for calibration as for
measuring, see chapter 5.8.1 on page 37.
Make sure the measuring head is properly levelled as described above before
calibration. Place the calibration unit in front of the measuring head as described
below:
Attach the gauge to the measuring
head.
Walk four meters forward until the
yellow mark is visible and place
gauge on the floor.
Place calibration unit on yellow mark
and remove the front cover plate.
