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MiniRanger Plus – INSTRUCTION MANUAL
7ML19981CJ02
Simple Level Application
One of the most common applications of a Siemens Milltronics process material level
monitor is simple level measurement, whereby the material level or space between the
transducer and reflecting surface is measured and displayed. This may or may not
include alarms and mA output.
Example
The application is to obtain a level measurement and corresponding 4-20 mA output
proportional to material level in a gravel bin. The transducer face is 5 m from the bin
bottom. The empty level is 0 m (bottom) and the full level (span) is 4.5 m from the bottom.
A high alarm is required at 4 m from the bottom and a low alarm is required at 1 m from
the bottom. The maximum rate of filling or emptying is about 1 m/min. In the event of a
loss of echo, the MiniRanger Plus is to go into fail-safe low after 2 min.
empty
(P006)
span
(P007)
relay 2
P112-2
1.0 m
P113-2
1.1 m
off
on
P113-1
3.9 m
P112-1
4.0m
on
off
relay 1
