Operate
last update: 30.07.2014
page 19
In order to prevent an unintentional calibration to
completely wrong values (e.g. if the standard is
damaged or soiled or the optic window on the bottom
side of the instrument is soiled), the instrument tells
you how much the calibration diverges from the
nominal value.
If you get suddenly a higher deviation than usual, we
recommend rejecting this calibration by pressing
and determinate the cause through e.g.
cleaning the calibration standard as described in
chapter 8.2
again.
If a deviation higher than 15% occurs
repeatedly, a calibration by the manufacturer
is most probably needed.
In the standard setting there are listed night visibility
RL and day visibility Qd to be calibrated on the
calibration standard.
You can have a look at the standard settings if you
press i
n the menu „Calibrate“ the button
and
choose a geometry (R
L
or Qd).
If one of the geometries (R
L
or Qd) is deactivated, you
can activate them by clicking on the line
„Calibrate“
and choose
„On“.
Remark:
You can change the calibration interval as described
in chapter 14.6.9 on page 59.
8.4
Calibration on 2
nd
calibration standard R
L
& Qd
8.4.1
General
For the optional 2
nd
calibration standard R
L
& Qd we affix a pavement marking tape (road
marking foil) on a glass plate and indicate the measuring area. The retroreflection values are
measured and certified by Proceq. However, the values of the 2
nd
calibration standard R
L
& Qd
may differ because it is more prone to soiling than our regular calibration standard. The 2
nd
calibration standard R
L
& Qd should only be used in special cases for additional
checking/controlling.
