Burkert 8400 Manuel D'instructions page 17

5.6 Possible switching modes of the 8400
Hysteresis Mode
The change of state occurs when a threshold is
detected (increasing temperature: high threshold
(OHI) to be detected, decreasing temperature: low
threshold (OLO) to be detected).
Contact Not inverted
OLO OHI
T°
Window Mode
The change of state occurs when any
threshold is detected.
Contact
Not inverted
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.
8400
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Contact Inverted
OLO OHI
T°
Contact Inverted
T°
OLO OHI
ysteresis 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
T°
Switching examples of the 8400 depending on
the temperature and the switching mode chosen
17
T°
OHI
OLO
2 s 2 s 2 s
Time