CS400
System
Hardware Manual, Rev. 1.0, Sep 2021
42
It is important that the sensor is mounted at a distance from the target, sufficient to be able to "see" the entire
area of interest. For this reason, the manufacturer provides a field of view calculating software called "Spot Size
Calculator", which allows the calculation of the resulting spot size for a given sensor model and based on a
specific mounting distance, see
https://www.flukeprocessinstruments.com/SpotSizeCalculator/index.htm
Note
Make sure that the resulting spot size for the shadow sensor covers the size of the shadowed area!
Example:
Optical resolution for the MI3 sensor:
10:1
Distance to the kiln
5000 mm (200 in.)
Resulting spot size:
500 mm (20 in.)
6.4.4 Wiring
For an installation of two or more shadow sensors in a network, each MI3 communication box is wired parallel to
the others. You may connect up to 32 units. Make sure to deactivate the preset shunt resistor for all units except
for the last one in the chain. The switch for activating the shunt is found on the circuit board in the communication
box as shown in the figure below. To switch the shunt you must first open the box lid.
Figure 6-8: MI3 Circuit Board with Termination for Activating the Shunt
For detailed wiring of Shadow Monitoring see section 6.4.4
For recommended cables see section 3.5
Termination
