FEATURES
PUSHBUTTON OPERATION. The Pulsar
is programmed and operated by four buttons. The menu
key scrolls through the unit's various functions; the
“increase” and “decrease” keys adjust the
value of the selected function, and a start/stop key
(stay with me here) starts and stops whichever
function you've selected.
BACKLIT
LCD DISPLAY.
Cryptic displays are a thing of the past. The Pulsar's
two-line, 16-character LCD display spells out the
unit's various functions and their values clearly and
wins style points with its vivid Indiglo-type
backlight.
LINEAR,
FLEX AND TRICKLE-CHARGING MODES.
The Pulsar's linear mode charges at a steady rate, at
up to 8 amps; the amp rate is user-adjustable in 0.1A
increments. Linear charging is preferable for NiMH
cells and can also be used for Ni-Cds. LRP also
recommends using the linear mode for new packs. The
Pulsar's Flex-charging mode interrupts the charge
current with short bursts of discharging. This process
helps “wake up” batteries that have many cycles on
them or packs that suffer from “memory” problems.
Flex charging is useful for Ni-Cds, but it isn't
recommended for NiMH packs. The Pulsar's trickle mode
is activated after charging is completed and can be
set to 0.1 to 0.4 amp, or deactivated (NiMH cells
don't like to be trickled). While charging, the Pulsar
displays charge mode in use, charge time, amp rate,
input voltage, output voltage and pack capacity. When
charging is complete, the final values for capacity,
charge time and pack voltage are displayed.
ON-THE-FLY
AMP-RATE ADJUSTMENT.
Unlike other programmable chargers, the Pulsar's
charge rate can be adjusted without interrupting or
restarting the charge cycle. This feature is
especially handy when your race is coming up and you
need to speed up the charging process, or if you
realize mid-charge that you've set the amp rate higher
or lower than you'd like.
INTERNAL
COOLING FAN.
The Pulsar's internal cooling fan is programmed to
come on only when necessary. The fan quietly cools the
unit on hot days and when the charger is under a
significant load.
10A
DISCHARGER.
The Pulsar discharges packs at a fixed rate of 10 amps
and automatically stops discharging when the pack's
voltage reaches 3.6 to 6 volts (0.6 to 1 volt per
cell). The cutoff voltage is user-set in 0.1V
increments. After discharging is complete, the
battery's capacity, discharge time and average voltage
are displayed.
MOTOR
RUN-IN. The
“run-in” mode can be used to power a motor during
break-in, power a comm lathe, or even operate a DC
soldering iron. The run-in mode's voltage can be
adjusted from 2 to 7.2 volts in 0.1V increments.
MATCHING.
The matching mode does not actually “match”
batteries in the conventional sense of comparing the
performance of individual cells; instead, the Pulsar's
matching mode performs a discharge/charge/discharge
cycle using the user-set charge and discharge
amperages and then displays the pack's average
discharge voltage and capacity in milliamps and
seconds. This useful feature helps you better
understand how a pack will perform throughout a race
and makes it easy to monitor a pack's performance over
its life.
AUTOSTART
TIMER. For
maximum performance, it's best to have your pack reach
its peak charge just before you grid the car. The
Autostart timer helps you do this by allowing you to
set the Pulsar to begin charging anywhere from 1 to 99
minutes after you press the start key. Go ahead and
grab lunch; the Pulsar will start charging for you
even if you're late getting back to the pits.
AUTO
RESTART SYSTEM.
It happens all the time; while you're away from the
pits, someone accidentally shuts off your power supply
or disconnects the charger, or the shop's circuit
breaker pops. When power is restored, there's no way
to know just how long your pack was actually charging
or what its charge status was. The Pulsar has you
covered with its auto-restart function; if the Pulsar
loses power, it will automatically begin charging
without resetting any data once power has been
restored (it also sounds an alarm to let you know the
power is out). If the Pulsar is unpowered for more
than three minutes, the charger displays the duration
of the power failure and resumes charging.
ADJUSTABLE
DELTA PEAK.
A battery pack's voltage climbs during charging but
then drops when the maximum charge is reached. Peak
chargers “look for” this change in voltage (known
as the “delta” value; delta is the Greek symbol
for change) and stop charging when they detect a
voltage drop. This method works, but a pack's voltage
can fluctuate during a charge and fool the charger
into “thinking” that the pack has peaked before it
is fully charged. One solution to false-peaking is to
have the charger look for a deeper voltage drop to
signify a peak charge, but this can lead to
overcharging, particularly with NiMH packs. The
Pulsar's adjustable delta peak value can be set from 5
to 80 millivolts in 5mV increments, so you can tailor
the charger to your packs. To help you determine which
setting to use, LRP includes a “cheat sheet” with
suggested settings for all types of popular Ni-Cd and
NiMH cells, including receiver batteries and micro-car
packs. In addition to the delta value, suggestions for
charge mode, charge current and trickle current are
provided.
PEAK
CAPACITY SYSTEM (PCS-2).
The Pulsar doesn't rely on its adjustable delta peak
feature alone to prevent false peaking and
overcharging. According to LRP, the Peak Capacity
System uses advanced algorithms and a “digital
filter” to prevent normal fluctuations in the pack's
voltage from being interpreted as a peak charge.
OVERLOAD
AND REVERSE-POLARITY PROTECTION.
The Pulsar's software protects it against overload and
improper installation of the input and output leads,
and it will indicate faults on the Pulsar's LCD
screen. If the screen goes dark, it means that the
internal fuse has blown (and you're a hack). A spare
fuse is included, but you'll have to open the Pulsar's
case to install it.
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