Possible Switching Modes Of The 8039 - bürkert 8039 Bedienungsanleitung

5.6 Possible switching modes of the 8039

Hysteresis Mode
The change of state occurs when a threshold is
detected (increasing flow: high threshold (OHI) to be
detected, decreasing flow: low threshold (OLO) to
be detected).
Contact
Not inverted
ON
OFF
Flow
OLO OHI
Window Mode
The change of state occurs when any threshold
is detected.
Contact
Not inverted
ON
OFF
Flow
OLO OHI
The delay (DEL) is set for the both switching
thresholds. The switching only occurs when either
threshold value (OHI - OLO) is exceeded for a
duration higher than the DEL delay.
8039
Contact
Inverted
ON
OFF
Flow
OLO OHI
Inverted
Contact
ON
OFF
Flow
OLO OHI
OHI
OLO
Hysteresis Mode
Not inverted
Inverted
DEL = 0 s
Not inverted
Inverted
DEL = 2 s
Window Mode
Not inverted
Inverted
DEL = 0 s
Not inverted
Inverted
DEL = 2 s
Switching examples of the 8039 depending on
the flow and the switching mode chosen
21
Flow
2 s 2 s
OUT
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
2 s
t
Time