Options - Fluke 8050A Instruction Manual

OPTIONS
RECHARGEABLE BATTERY
(-01
OPTION)
601-8.
THEORY
OF OPERATION
601-9.
The
theory of operation
of the 8050A-0I
is
illustrated
by
the
main pcb
schematic
in
Section
7.
The
battery
power
supply
is
shown
below
the
standard power
supply
on
Sheet
I
of the schematic.
The
8050A-0I can
be
used with
line
voltage
from 90V
to
264V, 47
to
440
Hz.
(To
select
the
proper
line
voltage configuration,
refer to
the
8050 A-01
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
the
8050
A-0
1
with
the battery
removed. The power
converter
uses the
flyback transformer technique
to
develop
several
output voltages so
that
+13V,
-lOV,
+6V, and -5V
(with
respect to
power
supply
common)
are available.
609-10.
When
the battery voltage drops below
approximately 4V,
the
BT
annunciator appears
in
the
display.
601-11.
I^AINTENANCE
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.
601-12.
Battery
Replacement
601-13.
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, for
both
battery packs,
from
the
pcb
pins.
4.
Apply
pressure
to
the front and
rear sides of the
battery
cases to
disconnect the
cases
from
the
Main
PCB
Assembly.
5.
Remove
the blotting papers.
6.
Replace
the batteries
(and
blotting papers)
with
new
Fluke
battery assemblies.
7.
Reconnect
the battery cases 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.
601-14. Fuse Replacement
601-15. 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.
a.
For lOOV and
1
20V
instruments, replace
F3
with a I/16A, 250V,
type
MDL
fuse.
b.
For 240V
instruments, replace F3 with a
I/32A, 250V,
type
MDL
fuse.
601-16.
8050A-01 Line Voltage Selection
601-17. Use
the following procedure
to
change
the
operating ac
line
voltage on
the 8050A-0I:
1.
Complete
the
Calibration Access
procedure
given
in
Section 4 of
this
manual.
2.
Locate
the ac
line selection holes
on
the
Main
PCB
Assembly. (The white
wire from
the
power
receptacle
will be soldered
in
one
of the
holes.)
3.
Relocate
the white wire (from
the
power
receptacle) to the
pcb
hole labeled with
the
intended
voltage.
4.
Reinstall the case
and
relabel the ac
line voltage
designation
on
the decal
at
the
bottom
of the
instrument.
601-18. LIST
OF REPLACEABLE PARTS
601-19. Tables 601-2 and
601-3
list
replaceable
parts for
the
8050A-01.
Figures 601-1
and
601-2
are the component
location diagrams
for the 8050A-01.
601-2