...C3...
Seite 10
...C3... K01/0916
If the window point (duo point) is lower than or equal to the switching point,
an error message is displayed (Er4), its value is then deleted and thus its
function is disabled (applies to window point and switching point setting).
Value setting is similar to switching point setting.
The window point serves to monitor the measured value within a set range.
Example:
Switching point: 100 l/min; window point: 150 l/min; hysteresis: -1 l/min
The electronics switches when 100 l/min is exceeded. When the measured value
stays within the limits 99 l/min (100-1) and 151 l/min (150+1), then the electronics
also remains in the activated switch state (LED on). Should the measured value
exceed 151 l/min or drop below 99 l/min, then the electronics switches back.
Switching performance
The switching performance of the electronics is illustrated in the diagram below.
The contact closes (N/O contact) when the switching point is exceeded or when
the value drops below the window point. It opens when the window point plus
hysteresis is exceeded or when the value drops below the switching point minus
hysteresis. The switch state of the electronics is indicated by an
LED
.
Time / t
Display
bar (°C)
Hysteresis
LED on
Time / t
Display
bar (°C)
Switchpoint
Hysteresis
LED on
Hysteresis
Window point
LED on
Flow
Flow
