Options - Fluke 8050A Instruction Manual

OPTIONS
RECHARGEABLE BATTERY (-01 OPTION)
601-8. THEORY OF OPERATION
601-9. The theory of operation of the 8050A..()1 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..()1 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.() I 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.()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 1/16A, 250V, type MDL fuse.
b. For 240V instruments, replace F3 with a
1/32A, 250V, type MDL fuse.
601·16. BOSOA-G1 Line Voltage Selection
601-17. Use the following procedure to change the
operating ac line voltage on the 8050A.()I:
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.()1. Figures601-1 and 601-2 are the component
location diagrams for the 8050A.()I.