CB Watch 3 User Manual v6.3 - May 2019 Page 89 of 100
Absolute cabinet temperature
Alarms should be set to check that the heaters are working correctly. Depending on the
heater control settings, a minimum threshold could be set around -20
o
C to warn that the
heater is not maintaining the temperature above what is needed for the electronics.
A maximum temperature threshold could be set at 70
o
C to warn of any serious
overheating issue within the cabinet.
If no alarm is required, a very low minimum threshold (-100
o
C) and a very high maximum
threshold (100
o
C) should be set to ensure that no alarm is ever triggered.
Relative cabinet temperature
To avoid condensation, it is usually accepted that the inside of a cabinet should not be
much colder than the outside temperature. A delta negative of -10
o
C could be set to
warn that the heater is letting the difference in temperature exceed 10
o
C, or, in other
words, warn that the internal temperature is more than 10
o
C below the outside ambient
temperature.
The delta positive value is not very useful since we have absolute thresholds. It should be
set to a high number to avoid triggering an alarm (100
o
C)
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