AR2700 operating manual
7
plug and water pipe, central heating system radiator or external earth rod. If
fitting a separate external earth rod, consider the implications carefully if your
mains supply uses a Protective Multiple Earth (PME) system. If in doubt
consult an experienced electrician. Never earth to a gas pipe!
Always disconnect the charger from the AC mains supply when not in use.
If using dry batteries (Alkaline or Manganese), always remove the batteries
when exhausted or if the AR2700 is not going to be used for a while. This will
avoid leakage which could seriously damage the receiver.
There is a special on screen battery indicator with three segments
indicating state of charge / drain. The indicator is useful in
providing a short period of warning of low battery power.
Three segments indicates that there is plenty of charge in the
batteries, two segments indicate that the batteries are beginning to
loose their charge and one segment indicates that the batteries are
about to expire.
Background noise may still be heard from the loudspeaker even
though the batteries are exhausted, usually the Liquid Crystal Display or
receiver fails to operate in this condition.
Access to the battery compartment is via a
removable sub-panel on the rear
of the unit using a downward motion. Always
switch the receiver Off when inserting or removing
batteries. If fitting new batteries always select a
quality brand, 4 x AA size 1.2 or 1.5V cells are
required.
When replacing batteries the receiver may
automatically switch On, this is quite normal.
4-4 NiCads and charging
Before operating, charge the internal NiCad
batteries using the supplied charger for
approximately 16 hours.
NiCads are prone to “memory effect”, as a result
they may have to be cycled (fully charged then
used until flat) 3 or 4 times before they provide a
truly full period of operation. Once charged, you
should never again leave the NiCads in a flat condition. Although you may
charge the NiCads in order to “top up” their capacity if you have only used the
set for an hour or two, the NiCads should be cycled at least once per month to
ensure continued long term reliability.
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