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15 Applications
15.1 Minimum level monitoring with early warning and alarm
Switching output 1: early warning
SP1
Slightly above rP1 (to suppress wave movements)
rP1
Below preset level → early warning, start refilling
OU1
Hysteresis function, normally closed (Hnc)
Switching output 2: alarm
SP2
Min. value reached again → alarm reset
rP2
Below min. value → alarm
OU2
Hysteresis function, normally open (Hno)
XX�X = display value
A = early warning
B = alarm
•
If the level is below rP1, output 1 switches until liquid is refilled� If SP1 is
reached again, output 1 switches off�
•
If the level is above SP2, output 2 switches� If the level falls below rPs or if
there is a wire break, output 2 switches off�
•
By setting SP1 the maximum level can be controlled / monitored: the value of
SP1 determines up to which level (max) is to be refilled� When the maximum
