Burkert 8400 Manuel D'instructions page 19

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).
Not inverted
Contact
ON
OFF
T°
OLO OHI
Window Mode
The change of state occurs when any
threshold is detected.
Not inverted
Contact
ON
OFF
T°
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.
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Inverted
Contact
ON
OFF
OLO OHI
Inverted
Contact
ON
OFF
OLO OHI
ysteresis Mode
Not inverted
T°
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
19
T°
OHI
OLO
2 s 2 s
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
2 s
Time