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Fluke 8024B - 4.19. Battery;Backup Fuse Replacement; 4.21. Performance Test

Fluke 8024B
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8024B
4-18.
Clean
the
front
panel
and
case
with
a
mild
solution
of
detergent
and
water.
Clean
dust
from
the
circuit
board
with
low
pressure
(<20
psi)
dry
air.
Contaminants
can
be
removed
from
the
circuit
board
with
demineralized
water
and
a
soft
brush
(remove
the
Display
Assembly
before
washing,
and
avoid
getting
excessive
amounts
of
water
on
the
switches).
Dry
with
clean,
dry
air
at
low
pressure,
and
then
bake
at
50
to
60°C
(124
-
140°F)
for
24
hours.
4-19,
Battery/Backup
Fuse
Replacement
WARNING
BATTERY/FUSE
REPLACEMENT
SHOULD
ONLY
BE
PERFORMED
AFTER
THE
TEST
LEADS
HAVE
BEEN
REMOVED
FROM
THE
INPUT
JACKS,
AND
THE
POWER
SWITCH
IS
SET
TO
OFF.
BACKUP
FUSE
REPLACEMENT
PROCEDURE
TO
BE
PERFORMED
BY
QUALIFIED
SERVICE
PERSONNEL
ONLY.
USE
ONLY
THE
RECOMMENDED
REPLACEMENT
TYPE.
4-20.
Refer
to
Section
2
of
this
manual
for
battery
and
main
fuse
(Fl)
replacement
procedure.
Use
the
following
procedure
to
replace
the
backup
fuse
(F2).
1.
Complete
the
“Backup
Fuse
and
Calibration
Access
Procedure”
located
earlier
in
this
section.
2.
Using
a
pointed
tool
such
as
a
probe
tip,
pry
the
backup
fuse
from
its
holder.
3.
Replace
the
defective
backup
fuse
with
a
3A,
600V
type
BBS-3
only.
4-21.
PERFORMANCE
TEST
4-22.
The
performance
tests
are
used
to
compare
the
8024B
performance
with
the
list
of
specifications
given
in
Section
|
of
this
manual.
It
is
recommended
for
incoming
inspection,
periodic
maintenance,
and
to
verify
specifications.
If
the
instrument
fails
any
test,
calibration
adjustment
and/or
repair
is
indicated.
The
8024B
being
tested
will
be
referred
to
as
the
UUT
(Unit
Under
Test).
4-23.
Initial
Procedure
4-24,
Each
of
the
performance
tests
assume
that
the
following
conditions
exist:
1.
The
unit
has
been
allowed
to
stabilize
and
will
be
tested
at
an
ambient
temperature
of
23
£5°C
(73
+
9°F).
2.
The
fuse
and
battery
have
been
checked
and,
if
necessary,
replaced.
3.
Set
the
UUT
switches
to
the
following
positions:
POWER
ON
PEAK
HOLD
OFF
All
other
switches
out
4-6

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