BATTERY MODULE AND CARE
THE BATTERY MODULE
The battery module contains nickel-metal-hydride cells and has a built-
in battery-management system that controls charging and monitors
discharge. This provides a high capacity, low-weight battery system,
which can be recharged at any time. It is not possible for the user to
over-charge or over discharge the battery. For your own convenience
it is best to charge it regularly to keep it topped up, but leaving it in a
discharged state will do no harm.
On the front of the battery module are two buttons and a
10-segment LED display.
To find the amount of charge in your battery module, whether
connected to your DLRO or separate, press the Battery Condition Button.
The Battery State indicator will light between
1 and 10 segments signifying between 10% and 100% charge
respectively. After a few seconds this display will automatically go out.
BATTERY CHARGING
Please note - The battery should only be charged within the
temperature range 0°C to 45°C. Fast charging will not be allowed
if the temperature is below 10°C. Fast charging causes the
temperature of the battery to rise. If the temperature exceeds
45°C the charging rate will be reduced automatically.
To charge the battery, your battery module must be removed from
the instrument. Remove the module by pressing on the raised circular
area of the retaining clips and pull the top of the clip away from
the instrument body. The module now unplugs from the base of the
instrument.
Plug in the charger or connect to a 12 volt vehicle-type battery using
the ‘cigar lighter’ lead provided. The LED “Battery State” indicator will
light and show movement when the battery is charging. The battery
may be recharged before it has been fully discharged. It will normally
be recharged to 90% of capacity within 21/2 hours. Full charge may
take up to 4 hours before indicating that the battery is full depending
on the initial state of the battery. When charging is complete the battery
management circuitry will switch off so that over-charging is prevented.
Your battery module can be safely used in a partially charged state and
will not suffer if stored in a discharged state. However, you may wish
to have a spare battery that can be interchanged with the one in use to
provide continuous use of your DLRO.
As the battery ages, it may start to loose its capacity. In this case the
battery module has a slow charge facility which is activated by pressing
the Slow Charge button while switching on the charger supply until the
indicator bars start to move. This method of charging can take up to
48 hours and so is best reserved for a weekend or a period when the
instrument is not required to be used.
A fully charged battery, even if not used, will self discharge over a
period of several weeks (faster at higher temperatures). Always check
the “Battery State” indicator before starting work. A fully charged battery
will light all segments. A fully discharged battery will light no segments.
Slow Charge
Battery Condition
Battery State Indicator
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