Applications
Minimum level monitoring with prewarning and alarm
• If the level is below rP1, output 1 switches until liquid is refilled. If SP1 is
reached again, output 1 switches back.
• If the level is above SP2, output 2 switches. If the level falls below rP2 or if
there is a wire break, output 2 switches back.
• 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
level is reached, this is signalled by the LED OUT1 going out and output 1 s
witching off.
42
Switching output 1: prewarning
slightly above rP1 (to suppress wave movements)
below preset level
→
prewarning, start refilling
hysteresis function, normally closed (
Hnc
)
Switching output 2: alarm
min. value reached again
→
alarm reset
below min. value
→
alarm
hysteresis function, normally open (
Hno
)
t
L
SP1
rP1
1
0
OFS
OUT1
Hnc
1
0
OUT2
Hno
SP2
rP2
XX.X
prewarning
alarm
display value
