Piper Cherokee Six - Bench Hot Stabilation Output Test

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
OUTPUT
AMPERES
OUTPUT
TERMINAL
FIELD
AMPERES
VARIABLE
OUTPUT
LOAD
VOLTAGE
TEST
FIELD
ALTERNATOR
TERMINAL
GROUND
Figure
10-24.
Meter
Connections
for
Alternator
Performance
Test
10-27.
BENCH
HOT
STABILATION
OUTPUT
TEST.
To determine
the
hot
stabilized
output,
the
alternator
must
be driven
with
a suitable
driving
mechanism.
During
this
test,
the
following
shall
be monitored:
(Refer
to Figure
10-24
for
meter
connections.)
a.
Alternator
output
voltage.
b.
Alternator
output
current.
c. Field
current.
d.
Alternator
rpm.
Drive
the
alternator
at
sufficient
rpm
to
obtain
14 volts
at
the
alternator
battery
terminal.
Alternator
shall
be
self
excited,
otherwise
no
external
load
shall
be
applied.
An
external
D.C.
power
source
may
be
used
to
polarize
the
field
but must
be removed
as
soon
as
the
alternator
is self
sustaining.
Maintain
14 volts
at
no
load
by adjusting
rpm
for
a period
of
15
minutes,
at
which
time
record
the above
specified
data.
Apply
an
electrical
load
to
the
alternator
and
increase
speed
so
as
to obtain
5 amperes
output
(not
including
field
excitation)
at
14 volts.
Maintain
this
condition
for
15 minutes
by
adjusting
the rpm.
At the
end
of
this
period
record
the
above
specified
data.
Maintain
output
voltage
at
14
volts
and
vary
the
load
in
5 ampere
intervals.
At
each
5
amp
interval
allow
a
15 minute
stabilization
period
maintaining
output
by
varying
rpm.
Record
the
required
data
at each
interval.
Continue
this
procedure
through
the
maximum
output
(approximately
10,000
rpm).
ELECTRICAL
SYSTEM
Issued:
8/17/72
3B15