27 AUG 08
PRELIMINARY MANUAL
19 of 57
Rev 1_3
Commander LI90 Series
Common Information – There are several configuration aspects that are similar for all three
applications in the LI90 series.
•
Analog Input
o
The Commander accepts any 4-20 mA signal.
o
The Commander has the ability to accept a 4-20 mA that has been scaled to the
size of the tank / vessel or with a 4-20 mA that is from a non-configured
transmitter (in its original factory setup).
o
There are six parameters required to configure an analog input in the LI90 series.
o
For a scaled output. Use this description when using a transmitter that has been
configured with 4 mA set to an empty tank/vessel and 20 mA set to a full
tank/vessel.
•
Sensor Max. Range – This is the distance from the bottom of the tank to
the bottom of the installed sensor.
•
Sensor Dead Band – This is the distance from the full level of liquid to
the bottom of the sensor.
•
Sensor Height – This is the distance from the bottom of the tank to the
bottom of the installed sensor. This will be the same setting as the Sensor
Max. Range.
•
Sensor Fill_H – This is the distance from the bottom of the tank to the
highest level of liquid. Adding the Fill_H value to the Dead Band value
will equal the Max. Range or Height values.
•
Empty Setting – This is the display value when the tank is empty.
•
Full Setting – This is the display value when the tank is full.
