Hysteresis
The Hysteresis value defines the width of the tolerance range for sending an alarm. This function
stops multiple alarms from happening when the value goes up and down around a set point. You
can see this on the graph.
Within the internal 5°C hysteresis band, the alarm would be activated at point 8 and would end
at point 9. Because of the hysteresis function, the alarm is extended until the temperature
reaches the end of the hysteresis zone (point 10) 5 °C + (-15 °C) = -10 °C.
• Hysteresis (=5 °C): The unit sends 3 alerts (email, SMS, …)
Alarm at points 0-4, 8-10, 12 and upwards.
• Without hysteresis (0 °C): The unit sends 8 alerts (email, SMS, …)
Alarm at points 0-1, 2-3, 8-9, 12-13, 14 and upwards.
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