HE 5411 Operating Instructions
#340411 | version 1.7
21
7.1
Limit LED
The limit LED serves as a status display for rising or falling pressure. This function is of
particular advantage in the case of pressures around the set limit value, since the hysteresis
can be read by means of the LED colours.
Note!
The limit relay h
ysteresis can only be set with the “EasyTool Controls” PC
software, Version 4.0 or later. The factory setting of the hysteresis is 1 %.
7.1.1
“Limit threshold” mode
Limit LED status display in “Limit threshold” mode
LED
Meaning
If the status display shows a single-colour green light, this means that the
measured pressure is below the limit value and outside of the set hysteresis
range.
If the status display shows a green/yellow light, this means that the
measured pressure is below the limit value and inside the set hysteresis
range.
If the status display shows a single-colour red light, this means that the
measured pressure is over the limit value and outside of the set hysteresis
range.
If the status display shows a red/yellow light, this means that the measured
pressure is over the limit value and inside the set hysteresis range.
Hysteresis
Pressure rising
Pressure
falling
Limit relay
Limit relay
Hysteresis
