any time the
INT/EXT
VOLT
SELECTOR is in
the
INT
position.
CLAMP-ON AMP
PROBE
The black CLAMP-ON AMP PROBE
(Figure
1)
is
attached to the
unit via a green test lead. The AMP
PROBE
senses
the amount of current flowing in any
wire.
NOTE: Polarity can be
ignored when clamp is
on
test lead but
must
be
observed when clamp
is on
vehicle cable.
To
use the arrow on
the probe to indicate proper
polarity, clamp
the black AMP
PROBE
around the
negative
battery
cable
with
the
arrow pointing
away
from the battery. When
the AMP PROBE is on the
plus
(+)
side, the
battery is charging.
A
special circuit
in the tester uses the
CLAMP-ON
AMP PROBE to sense
diode stator conditions, pro-
vided
that at least 5 amps of current
is flowing.
BLUE
FIELD LEADS
The
BLUE FIELD
LEAD is
used
in place of the volt-
age
regulator when
it becomes necessary to
bypass
the
regulator for making
a pinpoint charging system
output
test.
This lead is
equipped with the three
commonly used
connector types for convenient
connections to alternator
and generator field termi-
nals.
See Figure 1.
CAUTION: Place
boot over lead not in
use
to
prevent field leads
from grounding out.
TRIGGER LEAD or
INDUCTIVE TACH PROBE:
TheTRIGGER LEAD
or INDUCTIVETACH
PROBE
clamps
around any spark plug
wire for engine speed
indication.
TESTER
FUNCTIONS/FEATURES
ALARM FUNCTION
The purpose of
the ALARM
FUNCTION is
to indi-
cate that a
condition exists
which may
cause dam-
age
to the unit, battery,
or
vehicle charging
system.
The
alarm will function
in any
of the FUNCTION
SELECTOR positions.
Under
the following
condi-
tions,
a beeper will
sound and
either the amps
or
voltage displays
will flash
until the
alarm
condition
is removed or
tester
(and
load)
is
placed in
OFF
position. Resets
will not
operate.
1.
When
the
internal voltage
values
are greater-
than
16
volts alarm
will sound and
voltage dis-
play will flash.
2.
When
the
external
voltage values are greater
than
24
volts alarm will sound
and
voltage
dis-
play will flash.
3. When the
unit’s carbon
pile has reached
an
overheat
condition alarm
will sound and
amps
display
will flash.
Detection of this
condition
is
achieved through
the
use
of a thermo sen-
sor/switch located near the
carbon pile assembly.
“FREEZE” FUNCTION
The
purpose
of the
“FREEZE”
FUNCTION
is to
“freeze” the
displayed
voltage
and current
values of
a
test
at a specified
point in
the test
sequence.
The
readings
will freeze
automatically.
Displays remain
FROZEN until:
1. Test
is reset.
2. FUNCTION SELECTOR has
been
moved to
OFF. (Test results lost.)
“FLASHING” FUNCTION
Display “FLASHES” when:
1 . Volts
or
amps
measurements
are not
within
lim-
its (open circuit voltage less than
12.4).
2.
Questionable
data exists based on
failure
of
another
test value to
be within
limits.
3. Test is
considered
incomplete.
Display “FLASH” stops when:
1. Test
has
been reset.
2.
FUNCTION SELECTOR has
been
moved to
MANUAL.
Any test results
stored in a FLASHING mode will
be
redisplayed
in this manner whenever the FUNC-
TION SELECTOR has been
moved to
a
different
selector position (other
than MANUAL)
and
returned.
“TEST
COMPLETE” BEEPER
Where stated, a
beeper will sound
twice
at
the end of
a
test sequence
to indicate test completion.
TEST
ABORTED CONDITION
An
operator
aborts a test by either voluntarily
choosing to end a specific test before its regular
finish
or by making a mistake in a test
procedure
or
hook-up.
The VAT
60 also aborts specific system tests
when
certain
data readings do not meet
the limits
neces-
3
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