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1 - 8 VC5090 Vehicle Computer Product Reference Guide
8. Torque the screws to 9 ± 0.5 kgf/cm (7.8 ± 0.4 in-lbs).
Installing the Vehicle Computer
Refer to Chapter 2, Installation for information on installing the vehicle computer onto a vehicle or to a fixed
mount, as well as installing accessories.
Charging the Memory Backup Battery
The vehicle computer is equipped with a memory backup battery which automatically charges from the input
power whether its operating or is in suspend mode. The memory backup battery retains data in memory for at
least 72 hours when power is removed or the UPS is fully discharged. When the vehicle computer is used for
the first time, the backup battery requires approximately 15 hours to fully charge. Do not remove power from
the vehicle computer for 15 hours to ensure that the backup battery fully charges. The Main Power switch on
top of the vehicle computer must be set to the on position. If power is removed from the vehicle computer and
the UPS is fully discharged, the backup battery completely discharges in several hours. The backup battery
retains data in memory for at least 72 hours when power is removed.
Starting the Vehicle Computer
To power on the VC5090, place the Main Power switch, located on the top of the VC5090, to the on (|) position.
The VC5090 initializes and the Symbol splash screen appears followed by the calibration screen. Follow the
instructions for calibrating the screen. If the vehicle computer does not power on, See Troubleshooting on page
8-2.
To suspend the VC5090’s operation, press the Power button on the Quick Access Panel. All data is preserved,
so the applications running continue after suspension. Press the Power button again to resume normal
operation.
CAUTION Ensure that you torque the screws to seal the device properly. Otherwise, sealing can be
compromised.
NOTE Do not remove power to the vehicle computer within the first 15 hours of use. If the power is removed
before the backup battery is fully charged, data may be lost. The Main Power switch on top of the vehicle
computer must be set to the on position.
NOTE The power is applied at all times if the VC5090 is hard wired to the vehicle battery. If using the Ignition
Sense cable and the vehicle ignition is off, then power is not applied to the vehicle computer.