GENERAL
INFORMATION
DESCRIPTION
OF
TESTER FUNCTIONS
The
VAT 60
diagnostic
Volts/Amps
Tester provides
automated
test sequences
for battery,
starting, and
charging
systems. The
microprocessor-controlled
computer
simplifies
test procedures
on these sys-
tems and
indicates results
digitally on special
vacuum
flourescent
displays
(VFD’s). Amps,
volts, rpm, and
time
in seconds
can be displayed
on the
VFD’s.
Additionally,
GOOD/BAD
indicator displays
results
of tests
based on
pre-determined
limits.
Unit
also includes an
automatic zero
adjust/reset
switch, function
selector, load
control knob and
lamp,
internal/external
volt
selector, field selector,
and
ignition
selector. Also,
an alarm and fan
indi-
cate and
cool carbon
pile overheat
conditions.
Function
selection and lead
connections are per-
formed by
the operator.
Recessed
lead storage
area on front of tester.
Tester
includes
portable test
stand.
TESTER VOLTAGE SUPPLY
The VAT 60 is
powered from
the vehicle battery
via
the battery load
leads. The
accuracy of the amps
display
readings is maintained as
long as the volt-
age
available to the
load leads is 4.5
volts or more.
Should the
applied voltage
fall below
4.5 volts, the
amps
display will blank out.
DISPLAYS AND
CONTROLS
VACUUM
FLUORESCENT
DISPLAY
(VFD)
Two
dual-function VFD’s
digitally display
values
in
large
14 cm
numerals. VFD
values can
freeze or
flash in certain
conditions
described later in
this
manual
under TESTER
FUNCTIONS/FEATURES.
Each display
measures
6-1/2
x
2-3/4
inches.
(See
Figure
1.)
Amps/rpm
Amps display indicates
current
(amps) on tests
and
includes an rpm
tachometer
that shows rpm
from 0
—
3000
in 100 rpm lighted
increments
or “pickets”.
RPM will be displayed
when the
FUNCTION
SELECTOR is in
the MANUAL
and
CHARGING
positions. Readings
over
3000
rpm
will cause
all
display pickets to flash
until the value
falls below
this maximum limit.
Amps display also
gives
GOOD/BAD condition
of diode stator
following
that
system test.
Volts/Time
Volts
display indicates
volts and
also includes a
15
second countdown timer divided
into
1/2 second
illuminated pickets that
go out as testing time
expires. Beeper
automatically
sounds when
15-
second test time expires.
NOTE: The operator
does
not need to see the
displays during
testing.
Test results will be
stored after beeper
sounds.
Good/Bad indicator
Both displays
are equipped with
a GOOD/BAD
indicator to display results
of system tests
based on
pre-determined limits for that
specific
test. The
indicator(s) will remain displayed
until the
test
is
resetorthe
FUNCTION SELECTOR
has been placed
in the MANUAL
or OFF position.
LOAD CONTROL
KNOB
Z
The LOAD CONTROL KNOB
(Figure
1)
is used to
load
6
or
1 2 volt batteries.
Loads up to
600
amperes
at 11V
or6.6Kw can be applied
with a duty cycle of
15 seconds “LOAD
ON” followed
by a 60-second
“LOAD OFF”
to be observed. The LOAD
CONTROL
KNOB is also
used to apply manufacturer’s
speci-
fied loads
in performing charging
system
tests and
detailed tests.
NOTE: Loads
should only be applied
to 6
or
12-volt batteries.
LOAD INDICATOR
f
When
the
LOAD
INDICATOR light
(Figure
1)
is ON,
it indicates a load
is being
applied. When
the LOAD
CONTROL KNOB is OFF, the LOAD
INDICATOR
will be OFF as
well, indicating
a “no load”
condition.
CAUTION: The LOAD INDICATOR
is a
reminder to
set the LOAD
CONTROL KNOB
“OFF” after completion of
a
test
requiring a
load. A
periodic check of
the
LOAD
INDICA-
TOR light bulb
is strongly
recommended.
FUNCTION
SELECTOR!
The
FUNCTION
SELECTOR
(Figure
1)
allows the
operator to move
easily from one
system test to
another. The
selector is comprised of an OFF
posi-
tion, one MANUAL
testing
mode, and three AUTO-
MATIC CAPTURE
testing modes: BATTERY
LOAD,
STARTING,
and CHARGING/DIODE
STATOR,
Basically, each mode’s general function is
as follows:
OFF
—
OFF is not a mode of operation.
It is
designed
as a
safety feature to shut power
off to the
unit.
CAUTION: Though
FUNCTION
SELECTOR
may be in OFF
position and no power is
enter-
1
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