Fluke 8050A - 601-12. Battery Replacement Procedure; 601-14. Fuse Replacement for Battery Option; 601-16. 8050 A-01 Line Voltage Selection

OPTIONS
RECHARGEABLE BATTERY (-01 OPTION)
601-8. THEORY OF OPERATION
601-9.
The theory
of
operation of the
8050A-01
is
illustrated
by
the main pcb schematic in Section
7.
The
battery power supply
is
shown below the standard power
supply on
Sheet
1 of the schematic. The
8050A-01
can
be
used with line voltage from
90V
to 264V,
47
to
440
Hz.
(To select the proper line voltage configuration, refer to
the
8050A-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
8050A-O
1 with the battery removed. The power converter
uses the flyback transformer technique
to
develop several
output voltages so that +13V, -IOV, +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. 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.
601-12. 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
120V
instruments, replace
F3
with a
l/16A,
250V,
type
MDL
fuse.
b.
For
240V instruments, replace F3 with a
1/32A, 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-01:
l. 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-Ol. Figures601-l
and60l-2are
the component
location diagrams for the
8050A-Ol.