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5 Power management
The VS+ can be powered from the internal lithium-ion battery or from an optional external lithium-ion battery.
Power can also be ‘hot swapped’ between internal and external batteries to ensure that scanning operations can
continue while the power source is changed.
5.1 Internal power
The VS+ contains a rechargeable lithium-ion battery which can provide up to 6.2 Ah at a nominal voltage of 14.4
Vdc. This equates to approximately six hours of scanning time.
When the internal battery drops beneath 10.8 Vdc, the VS+ shuts down.
Battery life is extended by keeping a partial charge on it when in frequent use. The battery can be damaged by deep
discharge and is fitted with protection to avoid this occurring. When the battery has run out of charge, use the
supplied battery charger to recharge it.
To power the VS+ from the internal battery, depress the Internal Power Source power button on the side panel.
This turns the VS+ ON. The button illuminates blue when it is pressed, providing the internal battery is sufficiently
charged.
The Internal Power Source button changes from constant illumination to flashing when the battery voltage drops
below 13.6 Vdc.
Press the Internal Power Source button again to toggle the power OFF.
The VS+ shuts down automatically when the internal battery voltage drops below 10.8 Vdc. However, if a scan is
in progress and the voltage drops below 11.2 Vdc,
Carlson Scan
software carries out a controlled termination of
the ongoing scan. In this case, the
Carlson Scan
project is automatically saved, along with the terminated scan.
See the
Carlson Scan
manual for details.
A fuse located next to the Internal Power Source button is dedicated to the internal battery circuit. The fuse holder
carries a 3.15 A time-delay fuse: T3.15 AH 250 V.
To recharge the internal battery, connect the supplied battery charger. The battery charger supplied with the unit is
designed to meet the specific charging requirements of the lithium-ion battery. The battery charger operates at 2 A
and takes around three hours to fully charge the battery.
The internal battery will not power the VS+ when it is being recharged. If the battery charger is connected to the
Internal power
button
Fuse for
internal power
Connector for
charging
internal power
Figure 30 Internal Power Source button, connector and fuse
