2 setting alarm limits, Alarm limits, Critical temperature alarms – Acme PP-32 User Manual
Page 53: Alarm limits see also alarms, Critical temperature, Outside influence on temperature alarms, Temperature alarms see alarms, Weather see temperature, Pp-32, Regular temperature alarm detection
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PP-32
KOOLMASTER PP-32
REV.01
5.13.2 Setting Alarm Limits
The following diagram explains how temperature alarms are detected:
When the average room temperature exceeds the high temperature
alarm setting (Set Point + Hi Offset), a high temperature alarm is
generated. When the average room temperature drops below the low
temperature alarm setting (Set Point - Lo Offset), a low temperature
alarm is generated.
The critical temperature is the absolute maximum temperature allowed
in the room.
Oustide Temperature Influence on Alarms:
This feature avoids false alarms due to warm weather: the room tem-
perature can exceed the Hi temperature limit in the case where the
outside temperature is warm enough. The room temperature must
remain equal or lower than: Outside T°+ Hi Offset+ Outside Influence.
The room temperature must always remain below the critical tempera-
ture, no matter what the outside temperature is. The following diagram
illustrates this situation:
ROOM
TEMPERATURE
Set Point + HI Offset
Set Point - Lo Offset
NORMAL RANGE: NO TEMPERATURE ALARMS
OUTSIDE THE RANGE: THE TEMPERATURE ALARM IS SET OFF
TIME
Set Point
An alarm
is set off
H
i Offs
e
t
Lo O
ff
s
e
t
REGULAR TEMPERATURE ALARM DETECTION