ESPEC BTL-433, Instruction Manual

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Precautions
Absolute high/low limit temperature (& humidity) alarms and upper deviation limit
temperature alarm.
The absolute high/low limit alarms are completely independent of the target temperature and
humidity. They do not change when target temperature or humidity are changed.
Conversely, the upper deviation limit alarm is relative to the target temperature. If the target
temperature is changed, the deviation alarm temperature changes in proportion.
Fig. 1.1. Temperature Alarm Settings
1.3.1. Safety Device Setting Example
High Limit Temperature
In the following example, the target temperature is 40°C and the maximum allowed
temperature of the specimens is 60°C. Safety devices are set as follows:
Table 1.2. Setting Example for Overheat Protector and
High Limit Temperature Alarms
Overheat Protector
+60°C
•
Set 20°C higher than target
temperature.
•
Set to specimen’s maximum
allowed temperature.
Temperature
(& Humidity)
Controller
Absolute
high limit
+55°C
•
Set 15°C higher than target
temperature.
•
Set 5°C lower than specimen’s
maximum allowed temperature.
Upper
deviation limit +10°C
Set 10°C higher than target
temperature. (will trip at 50°C.)
Constant Mode
Start
Constant Mode
End
Absolute low limit temperature alarm
Target Temperature
Upper deviation limit temperature alarm
(Target tempe10°C)
Absolute high limit temperature alarm
5
25
35
45
Temperature (°C)