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Chapter 7 Maintenance
A VRC 6940 terminal requires minimal maintenance. However, as with any electronic device,
proper use and care will increase its life. This chapter provides basic maintenance instructions
including:
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maintaining the internal battery
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storing the terminal
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cleaning
Maintaining the Internal Battery
The VRC 6940 has an internal NiMh battery designed to maintain session data while the
terminal is disconnected from its main power supply (e.g., while it is being moved from one
power source to another). You cannot use the internal battery to operate the terminal. If you
remove or disconnect the main power supply (vehicle battery or other external power source),
the terminal shuts off and cannot be started again until you reconnect the external power.
As long as the battery is charged, the terminal resumes from where it left off when you
reconnect the main power supply. However, if the internal battery is not fully charged, the
terminal may lose any unsaved data when you unplug it from the main power supply.
The first time you use a terminal, connect it to a power source and turn it on to make sure
that it is working. If the main power supply is not stable, there may be power interruptions
that cause the terminal to reset itself during its first few hours of operation. If the terminal
resets itself, you may lose unsaved data. To avoid this, we recommend that you plug in the
terminal and allow it to charge for a minimum of two hours before using it.
It takes 48 hours to fully charge the internal battery. A fully charged internal battery can
maintain data for up to 72 hours if the unit is disconnected from its main power supply. This
time is reduced if the radio maintains continuous communication with a host.