Wiring; Figure 6-8: Mi3 Circuit Board With Termination For Activating The Shunt - NBN Fluke CS400 Hardware Manual

CS400 System
Hardware Manual, Rev. 1.0, Sep 2021
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
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:
Distance to the kiln
Resulting spot size:

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.
For detailed wiring of Shadow Monitoring see section 6.4.4 Wiring, page 42.
For recommended cables see section 3.5
42
https://www.flukeprocessinstruments.com/SpotSizeCalculator/index.htm
10:1
5000 mm (200 in.)
500 mm (20 in.)

Figure 6-8: MI3 Circuit Board with Termination for Activating the Shunt

Cable
Note
Termination
Requirements, page 19.