load
to apply
to
test a battery depends
on which
rating
is
known.
1. Ampere
Hour
Rating
If the
Ampere
Hour
rating is known, multiply
this rating by
3
to obtain the load. For
example,
a 60
ampere
battery
multiplied
by 3
equals a 180
ampere
load.
2. Cold
Cranking Current at 0°F
When
using
this rating,
divide
it by
2 to obtain
the load.
For example,
a battery
with a Cold
Cranking Current rating of 400
divided
by 2
equals a
200
amps load.
In
the
Battery Performance Load Test,
the specified
load
is applied to
the battery while
observing the
battery voltage.
Test sequence
1. Be sure LOAD CONTROL
KNOB
is fully
counterclockwise to OFF and
FUNCTION
SELECTOR is
in OFF
position.
2.
Connect BATTERY LOAD
LEADS
to
proper
battery terminals.
See
Figure
3
page
5
for
hookup.
3. Connect
the
Black clamp-on
AMP
PROBE
around
either
TESTER load cable (disregard
polarity).
See
Figure
3
for hookup
illustration.
4.
Set FUNCTION
SELECTOR to BATTERY LOAD
position.
5. Apply load current of at least 50
amps using
LOAD CONTROL KNOB to begin
test process
and initiate (automatically)
15-SEC.
countdown
TIMER.
6.
Determine
PRE-TEST state-of-charge
condi-
tion of battery
by observing initial open circuit
voltage reading.
Charge battery
if
open
circuit
voltage is
low.
See
page
5 for
open
circuit
voltage
conditions
and
good/bad
battery
determinations.
NOTE:
Open
circuit voltage should be
greater
than
12.4V. If
not, voltage reading flashes.
7.
Load battery to half
the
manufacturer’s-rated
cold-cranking amp value for the timed
period
using LOAD CONTROL KNOB.
8
.
Maintain load
for
1
5
seconds
until
beeper sounds
and
note display readings.
NOTE: Test load amps
should be
reached as
soon as
possible after starting
to
apply
load
and
amps
should
be
maintained
by regulating
load
control.
Test aborted condition
If the amps
reading
falls below
50
amps before the
15 SEC.
TIMER
has
timed
out,
the
test
will
be
aborted. The values
at
the last instant the current
was still greater than 50 amps will be stored and
“FLASH”
until the
test
is reset.
The
BEEPER will
sound twice when
the
values are stored.
9. After 15-SEC.
TIMER
has timed
out,
observe
“frozen” voltage and current displays.
Battery state-of-charge
indications:
a.
GOOD
—
maintains
a voltage
of
9.6
volts or more
for
at
least 1
5 seconds
(5
volts
for 6 volt batteries).
b. BAD
—
indicates
a
load
voltage
of less
than 9.6
volts
(4.8
for
6 volt
batteries). Shows
that
the
battery is not serviceable in its present condition.
Charge
and
retest.
NOTE:
This
battery
should also be completetly
tested
to
determine
if
it
is
defective and needs
replacing or is merely in need of a
recharge.
A battery
reading 9.6 to 9.9 volts (4.8 to
4.9 for
6
volt batteries)
would be
considered “fair.”
NOTE:
Batteries that test in
this range can
be
used to
perform starting
system tests. However,
these
batteries
should
be
completely tested
to
determine whether
the
battery
is defective
or
merely
needs charging.
Through
this process,
marginal batteries
will be detected
and replaced,
preventing a road
failure.
NOTE: The
above conditions
also apply
to
those batteries found
to have
an initial
open
circuit voltage
of
less than 12.4V
in
the PRE-
TEST battery condition evaluation.
6
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