Line Frequency Noise Rejection; Battery Replacement; Fuse Replacement; Ac Line Voltage Selection - Fluke 8010A Instruction Manual

OPTIONS
MAINTENANCE
601-11. Line
Frequency Noise Rejection
601-12.
Noise
rejection
can be selected
for 50
Hz
or 60
Hz
line
frequencies.
The
line
frequency,
as set
at
the
factory,
is
indicated
on a decal attached to the
bottom of
your
Multimeter. Refer
to
the Line
Frequency
Selection
procedure, given
later in this section, to
change
the noise
rejection
frequency,
601-13.
THEORY OF OPERATION
601-14.
The
theory of operation of the
Multimeter
is
illustrated
by
the
Main
PCB
Assembly schematic
in
Section
7.
The
battery
power supply
is
shown above
the
standard
power
supply
on
the schematic.
The Multimeter
can be used
with
line
voltage
from
90V
to
264V,
50
Hz
or
60
Hz
(To
select
the
proper
line
voltage configuration,
refer to the
AC
Line Voltage
procedure, given
later
in this
subsection.)
Fuse F3
provides protection for the
power
supply.
Line
power
input
is
rectified, filtered,
and
regulated.
The output of the
power supply
acts as
a
current source for the battery.
The
battery
determines the
voltage
level
into
the
power
converter.
Do
not operate
your Multimeter
with the battery
removed.
The power
converter uses the flyback transformer technique
to
develop several
output
voltages so that
+1
1.5,
-11.5,
+2.9
and
-6.5V
(with respect to
power
supply
common)
are
available.
601-15.
MAINTENANCE
WARNING
THESE
SERVICING INSTRUCTIONS
ARE
FOR USE BY QUALIFIED
PERSONNEL
ONLY.
TO
AVOID ELECTRICAL SHOCK,
DO
NOT PERFORM ANY
SERVICING
OTHER
THAN THAT CONTAINED
IN
THE
OPERATING INSTRUCTIONS UNLESS
YOU
ARE QUALIFIED
TO DO
SO,
601-16.
Battery
Replacement
601-17.
Use the following
procedure
for
removing and
replacing batteries;
1.
Complete the Calibration
Access procedure
given
in
Section
4
of this
manual.
2.
Turn
the
instrument upside
down.
3.
Unplug the red
and black
battery wires
from
the
pcb
pins.
4.
Apply
pressure
to the front
and
rear sides
of the
7.
Reconnect the battery case to
the
Main
PCB
Assembly.
8.
Connect
the battery wires to their
appropriate
pins
on
the
main
pcb, with- red to
+
and black
to
-.
9.
Reinstall the
instrument in
its
case.
601-18.
Fuse Replacement
601-19.
Use
the following
procedure
to
replace the
main
power
fuse,
F3:
1.
Complete the Calibration
Access procedure
given in
Section
4
of this
manual.
2.
F3
is
located
immediately in
front of the
power
receptacle.
Replace
F3
with
a'
1/32A, 250V,
type
MDL
fuse.
601-20.
AC
Line Voltage Selection
601-21. Use
the
following
procedure
to
change the
operating acTine voltage
on
the
8010A-01 or 8012A-01:
NOTE
If the
change
in
operating voltage also
changes the line
frequency refer to
the
Line
Frequency Selection
procedure, given later in
this
section.
1.
Complete the Calibration
Access procedure
given in
Section
4 of
this
manual.
2.
Refer
to
Figure
601-1 for the location of the ac
line
switch S2,
on
the
Main
PCB
Assembly.
3.
Set
S2
to the
1
lOV
or
220V
position
depending
upon
the
intended
line
voltage.
4.
Reinstall the case
and
relabel
the ac
line
voltage
designation
on the decal
at
the
bottom
of the
instrument.
601-22. Line
Frequency
Selection
601-23.
Use
the following
procedure
to
change
the line
frequency
noise rejection
on
the
8010A-01 or
8012A-01:
1.
Complete the Calibration
Access procedure
given
in
Section
4
of this
manual.
battery case to
disconnect the case
from
the
Main
PCB
Assembly.
5.
Remove the blotting paper.
6.
Replace the batteries
and
blotting
paper with a
new
Fluke
battery assembly.
601-2
2.
Refer
to
Figure
601-1 for the location of
the
line
frequency selection
switch
S3,
on
the
Main
PCB
Assembly.
3.
Set S3
to
the 50
Hz
or
60
Hz
position
depending
upon
the intended
line
frequency.