Digital Transformer Ratiometer DTR
®
Model 8510
55
The smart charger has the following features:
•
Multiple charge detection methods -dV (typical) and dT/dt.
Typically, the indication that the battery is fully charged is
detected by a slight drop in its voltage (-dV). However, if the
batteries are unused for a long time, they may display the
same drop in voltage in the early part of the charge cycle even
if they are not fully charged. This is a false indication. In order
to prevent the termination of charge cycle due to this false
indication, there is an integral timer built in the charger which will
disregard the –dV for the first minutes of the charge cycle.
The battery packs are built with a thermistor. The smart charger
constantly monitors the battery pack temperature. A built-in
temperature charge control (+dT/dt) secures optimal charge.
•
Safety timer termination.
In case the batteries do not exhibit sufficient –dV/dt for the
charger to detect, there is an internal safety timer which is
custom-programmed for the battery packs used in the DTR
®
Model 8510.
•
Fast charging cycle.
This charge cycle supplies a maximum 900mA charge until -dV
is detected.
•
Integral start timer to prevent initial, false -dV detection.
A few battery cells may have a voltage drop (-dV) in the first
part of the charge cycle. This is especially true for battery cells
which have been idle for a long period of time. Because of this, a
start-timer built into the charger prevents -dV detection in the first
minutes of the charger cycle.
•
Reverse polarity/short circuit protection.
The charger is protected against reverse polarity by an
automatically resettable polyswitch fuse on the output.
•
LED status indicator
(see Table 8-1 on page 54)
.
•
Universal input voltage.
With the use of a proper power cord, the charger can be
connected to standard AC receptacle anywhere in the world
without the need for an external transformer.
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