Burkert 8400 Mode D'emploi page 19

.6 possible switching modes
hysteresis mode
The change of state occurs when a threshold is
detected (increasing temperature: high thresh-
old (OHI) to be detected, decreasing tempera-
ture: low threshold (OLO) to be detected).
Contact Not inverted
ON
OFF
T°
OLO OHI
Window mode
The change of state occurs when any
threshold is detected.
Contact Not inverted
ON
OFF
T°
OLO OHI
the delay (del) is set for the both switch-
ing thresholds. the switching only occurs
when either threshold value (ohi - olo)
is exceeded for a duration higher than the
del delay.
8400
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Contact Inverted
ON
OFF
T°
OLO OHI
Contact Inverted
ON
OFF
T°
OLO OHI
T°
OHI
OLO
Hysteresis Mode
ON
Not inverted
OFF
ON
Inverted
DEL = 0 s
OFF
Not inverted ON
OFF
Inverted ON
DEL = 2 s
OFF
Window Mode
ON
Not inverted
OFF
ON
Inverted
DEL = 0 s
OFF
Not inverted
ON
OFF
ON
Inverted
DEL = 2 s
OFF
switching examples of the controller
depending on the temperature and the
switching mode chosen
1
2 s 2 s 2 s
Time