PRO AIR TPK 21, Функциональное описание и инструкция по эксплуатации

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Once you have selected whether or not the alarm must be acknowledged in the event of
lower limit violation, the "Lower Limit" for the pre-alarm can be set.
14. To do this, select the „Lower Limit“ field (highlighted) and confirm with .
This brings you to the following menu:
This menu item can be confirmed with
„Yes“ or „No“ by selecting the field in
the following screen.
14
15
Auto-Off
Upper Limit
Lower Limit
Used
Limit Value
Hysteresis
Yes
No
Description: Meaning:
Used The setting determines whether the upper limit for the pre-alarm should be used. If
it is not used, the following settings (limit value and hysteresis) are not possible.
Limit Value The (upper) limit value is the switching point, beyond which the pre-alarms is
triggered.
Hysteresis Hysteresis is the difference between the switch-on and switch-off points at the limit
value. The switch-on point is the limit value plus half of the hysteresis, and the
switch-off point is the limit value minus half of the hysteresis.