HP 8508A - Page 25

‘Operation
"341
GETTING
STARTED
=
Operation
|
=
Section
3
3-2
INTRODUCTION
This
section
provides
complete
operating
information
for
the
Vector
Voltmeter.
The
items
covered
include:
*
detailed
descriptions
of
each
front
and
rear
panel
key,
connector,
switch
‘and
display.
_
>
*
general
and
detailed
operating
instructions
oe
exe
heiee
ee
*
information
on
remote
operation
°
2
3-3
OPERATOR’S
MAINTENANCE
The
only
maintenance
you
as-an
operator
should
normally
perform
is
replacement
of
the
primary
power
fuse.
Fuses
.
may
be
ordered
under
HP
Part
Number
2110-0305
(T1:25A/250V)
for
100/120Vac
operation
or
under
HP
Part
Number
2110-0360
(T0.75A/250V)
for
220/240Vac
operation.”
Fault
finding
in
the
HP
8508A
is
aided
by
the
self-test
routine
which
is
run
whenever
the
instrument
poweris
-
switched
on.
This
routine
checks
the
assemblies
in
the
HP
508A
Vector
Voltmeter.
When
the
self
test
routine
is
initiated,
the
current
firmware
revision
will
be
shown
in
Display
2
for
a
few
seconds.
Display
1
will
then
show
’tSt’
while
Display
2
shows
a
3-digit
number
appropriate
to
the
assembly
being
tested.
The
entire
test
routine
takes
approximately
8
seconds
to
complete.
If
oné
or
more
faults
exist,
the
self
test
routine
will halt
at
the
first
fault
and
display
the
appropriate
error
number.
In
this
situation,
refer
to
Section
8
(Troubleshooting)
in
this
manual.
You
can
perform
an
automatic
calibration
sequence
by
pressing
[SHIFT]
[CAL
TEST].
|
All
other
maintenance
should
be
referred
to
qualified
service
personnel.
-
E1089
3-1