Chapter 4: Configuration
Quick Defrost (Heater Settings for VH10f)
79
Psion VH10 Vehicle-Mount Computer User Manual
Tapping on the
Export
button will display a “Save As” Export Settings dialog, with the default name
PsionVU_Settings.xml
, which the Administrator can change even after it has been saved.
The
.xml
file contains all of the PsionVU configured settings, including the
Administrator Password
. When
the file is imported to a device, the new password is applied immediately.
•
Whether choosing to Import or Export files, the same file location options under
My Device
will be
listed. Following the action, a message stating the success of the operation and the location of the file
will be displayed.
•
With the exception of the password, changes made to settings will take effect only after a warm reset.
If further changes to the configuration are made, they will overwrite the changes caused by the import
operation. After importing a file, a dialog will appear to enable you to reset now or later.
4.18
Quick Defrost (Heater Settings for VH10f)
The model VH10f Vehicle-Mount Computer has several heaters that can be used in cold environments to
prevent condensation from developing on or inside the VH10. The “Quick Defrost” heaters keep the display
clear of frost, the keyboard from freezing, and the ports (serial and USB) dry. In addition, the heater clears
fog from the display panel when the computer is moved in and out of cold environments. For environmental
specifications for this computer, see page A-4.
To ensure the computer works properly, the temperature of the internal components of the unit must be in-
creased to a temperature at which condensation doesn't occur. There are individual heaters for the mod-
ules: Display Panel, Keyboard, External Connector, and the Main Interface Board.
The Quick Defrost feature has two profiles that function automatically:
Defog Profile
and
Sustaining Profile
.
Defog Profile
The heaters enter into the Defog Profile when there is a sudden change in ambient temperature registerd
by the display panel sensor. This happens automatically when the computer moves between hot and
cold environments.
A change in the ambient temperature of 2° C during a three minute duration is an early indication that the
computer is moving into or out of a freezer environment. This rapid change in ambient temperature is used
