20
Magtrol Load Monitoring Units LMU 212 & 217
Chapter 2 – Installation / Configuration
The following table allows the user to select the sensitivity range of the strain gauge transducer.
strain gauge sensitivity
[mv/v]
sWa1 sWa2 sWb10
0,42 to 0,78
OFF
OFF
ON
¶
0,7 to 1,3
ON
OFF
ON
1,2 to 2.2
ON
ON
ON
With a strain gauge transducer connected to the load monitoring unit featuring a higher sensitivity
than listed on the above table it is possible to use the function dividing the signal by two (and therefore
use transducers with up to 4.4 mV/V sensitivity). See chapter
2.4.8, "Division of the transducer
signal or the input voltage U
I/P
by two".
note :
Record the selected strain gauge sensitivity as well as the
configuration of the micro-switches SWA1, SWA2 and SWB10 on
the configuration and calibration form (see
Appendix A
).
2.4.7
s
election
of
the
ApplicAtion
The LMU load monitoring unit can be operated on its own or connected to one or several LMUs
according to the desired application. In this case, the LMU output signal can be added to the signal
of another LMU. The output signals U
O/P
and/or I
O/P
of the last monitoring unit correspond to the
sum of its own signals and the signals of other connected LMUs. The detection thresholds can be
added following the principle.
Figure 2–12
indicates the location of the SWC micro-switches on the load monitoring unit board.
1 2 3
4 5 6
7 8
OFF
ON
9 10
SWC
micro-switches
Fig. 2–12 Location of the SWC micro-switches on the load monitoring unit board
