Configure the Heater Feature
You can configure the following parameters in Enterprise Settings or the computer
registry to optimize the operation of the heaters to fit your specific application
In freezer heater activation
Heater enabled temperature
Heater enabled delay (minutes)
Exit freezer temperature change trigger
Exit freezer heater on duration
Pre-heat enabled delay (minutes)
Pre-heat power level (%)
Registry Key: TempMonitoring
Registry Key: PreemptiveHeating
Registry Key: EnableT
Registry Key: ChillTime
Registry Key: DeltaT
Registry Key: DurationHeater
Registry Key: PreemptiveDelay
Registry Key: DutyCycle
Enable or Disable the heater feature and temperature
Enable or Disable the automatic pre-heat feature.
When enabled, modify the following parameters:
• Pre-heat enable delay timer
• Pre-heat power level
Set the temperature (°C) that the computer must fall to
before the heaters turn on. The Heater enabled
temperature is used to identify cold storage entry.
Once this temperature is detected, the Heater enabled
delay timer starts.
Set the time limit (minutes) for how long the computer
must remain at or below the defined Heater enable
• the heaters turn on if in Automatic mode, or
• the Pre-heat enabled delay timer starts when
In freezer activation (Preemptive mode) is
Note: If you remove the computer from cold storage
before the timer expires, the system does not turn
on the heaters, saving battery power.
Set the sensitivity of the cold storage exit trigger.
To detect a cold storage exit, the computer looks for a
quick rise in temperature (°C), defined by the Exit
freezer temperature change trigger value, over a brief
period of time.
Set the length of time (minutes) the heaters stay on at
full power (100%) once the computer detects a quick
rise in temperature, defined by the Exit freezer
temperature change trigger value (°C).
Note: The heaters may turn off before the timer has
expired if a temperature reading indicates the
computer is warm enough or you manually turn
off the heaters by tapping the heater icon once.
Set the length of time (minutes) that the computer
waits after the Heater enabled delay timer has expired
before activating the low power pre-heat window
Set the power level (%) of the heaters used during the
75 Series Mobile Computer User Guide