SITRANS Probe LR with mA/HART
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Operating Instructions, 05/2019, A5E32337711-AC
Application examples
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C.1
Application examples introduction
The application examples used in this manual illustrate typical installations using SITRANS
Probe LR. Because there is often a range of ways to approach an application, other
configurations may also apply.
In all examples, substitute your own application details. If the examples do not apply to your
application, check the applicable parameter reference for the available options.
C.2
Example 1: Liquid resin in storage vessel, level measurement
Note
•
The minimum distance from the flange face to the target is limited by Near Blanking
P800.
•
Only set P837 if the product is at least 2 m (78”) away from the flange face. If it is closer,
leave P837 at 1 until the level drops and the distance increases beyond 2 m (78”).
The application is to obtain a level measurement and corresponding 4 to 20 mA output
proportional to resin levels in a storage vessel. (Units selected are meters.) Process empty
level (Empty) is the bottom of the tank, which is 5 m from the antenna flange face. Process
full level (Span) is 4.5 m from the vessel bottom. The maximum rate of filling or emptying is
about 0.2 m/min. In the event of a loss of echo, SITRANS Probe LR is to go into Failsafe Hi
after 2 minutes.