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EXPERT 64+, rev.12
EXPERT 64+
4.8.2.1. Temperature Alarms
The diagram below shows how temperature
alarms are detected.
When the average room temperature ex-
ceeds the high temperature alarm setting,
a high temperature alarm is set off. When
the average room temperature decreases
below the low temperature alarm setting, a
low temperature alarm is set off. Although
these settings are entered by the user as ab-
solute values, they are defined based on the
room set point. They are thus automatically
adjusted if the set point changes.
The situation is slightly different when the
outside temperature is greater than the room
set point. In this case, the outside tempera-
ture becomes the reference point (instead of
using the set point as a the reference). This
means an alarm is set off when the room tem-
perature reaches
Outside Tempe High
Alarm Offset
(the offset being the difference
between the high alarm temperature setting
and the set point). A third parameter, called
the
Critical Temperature
, is defined to continue
monitoring the indoor temperature for high
temperatures. When the indoor temperature
reaches the critical high temperature (defined
as an absolute value), an alarm is set off.
Critical high temperature ramp:
The control-
ler can automatically change the critical
temperature alarm limit over time with a
three-step ramp. Each step specifies a day
number and a critical temperature alarm
limit for that day (the day number refers to
the animal age). Once all 3 steps are defined
and the ramping function is activated, the
controller changes the critical alarm limit in
a linear fashion between consecutive steps
of the ramp. When the last step is reached,
the controller maintains the critical alarm limit
for that day until a new batch starts.
Detection of
Temperature Alarms
Room T°
Alarm
Limits
Hi T°
limit
Hi T°
alarm
Lo T°
limit
Desired
T°
Critical T°
limit
103.0
85.0
78.0
1 5 10 14 19 24 28 33 38 42 47 Day
Critical Temperature
Ramp
Main Breaker Temperature Alarm:
The con-
troller can also monitor the temperature of
the main breaker and sound an alarm if this
temperature exceeds a user-defined limit.
Refer to section 4.8.3 to set the breaker’s
high temperature limit.
Summary of Contents for EXPERT 64 Plus
Page 1: ...EXPERT 64 Temperature Controller User s manual...
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Page 76: ...M 890 00077 rev 12 REV 07...
