K-Patents PR-21-S - Manual (Page 69)

6 Configuration and calibration 63
6.7.4 Sensor rangeability
The Sensor is made in two versions: Probe tip angle is either 50 degrees or 57 de-
grees. The value is stamped on the probe tip.
The rangeability of the two sensor versions is described in (Figure 6.18). The
shaded area shows the span for a typical mechanical zero setting. By mechani-
cal zero adjustment the shaded area can be moved right (holder moved outwards)
or left within the borders of the rectangle. E.g. The 57 degree version can mea-
sure up to RI 1.530. If the desired measurement range cannot be achieved with
the sensor version in use, then the sensor has to be exchanged. The standard span
in Figure 6.18 is based on an objective lens focal length f=10.
0.13
0.12
Figure 6.18 Sensor rangeability