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Example 1 Level Monitoring with Alarms
A vessel, containing a liquid that has a variation in level that is to be
monitored, with a high-level alarm set on Relay 1, and low level alarm set
on Relay 2.
empty distance (P105), 3.5m
100%, span (P106), 2.8m
85% , high alarm on (P213), 2.38m
80% , high alarm off (P214), 2.24m
15% , low alarm off (P224), 0.42m
10% , low alarm on (P223), 0.28m
0% , empty level
In this example, when the level rises to 2.38 m, relay 1 will come on until
the level drops to 2.24 m when it will turn off. If the level drops to 0.28 m,
then relay 2 will come on until it rises 0.42 m when it will turn off.
The display will show the level in the tank.
The mA output will be representative of level where 4mA = empty level
(0%) and 20mA = 2.8m (100%).
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