16
4 Mounting
SOLITRAC 31 • Profibus PA
43834-EN-211203
To measure the level in very high vessels, multiple instruments can be
cascaded.
Cascading means that two or several instruments are connected
which can together cover a longer measuring range.
You can find the exact number of possible Secondaries in the "
Safety Manual
".
L1
L2
h
1
Fig. 6: Installation position - cascading arrangement
h Summed measuring range
L Measurement length (L1, L2)
1 Red marking line for designating the measuring range
Here, one instrument acts as a Primary and all other instruments
operate as Summation Secondary. The pulse rates of all instruments
are summed in the Primary instrument and converted into a common
signal.
If several sensors are cascaded, the measuring ranges of the indi-
vidual detectors must directly join each other. The detectors must also
slightly overlap.
Make sure that the red marking lines directly join the measuring range
of the next SOLITRAC 31.
Mount the SOLITRAC 31 in such a way that the detector tube is
directly in the radiated area of the source container. Mount the
SOLITRAC 31 preferably side by side and make sure that no detector
tube is hidden by another sensor.
Summation
