8845A/8846A
Calibration Manual
2-6
To test for a blown Current Input fuse:
1. With the Meter powered up, plug a test lead into the VΩGER connector.
If the fuse is good, the Meter will read less than 200 Ω. If the fuse is blown, the
Meter will read overload.
2. Remove the probe from the 100 mA connector and insert into the 10 A
connector.
If the fuse is good, the Meter will read less than 1 Ω. If the fuse is blown, the
Meter will read overload.
To replace the Current Input fuses:
1. Turn the Meter off, unplug the power cord from the Meter, and remove all test
leads.
2. Turn the Meter on its back.
3. Unscrew the retaining screw on the fuse access door, as depicted in Figure 2-2.
4. Remove the protective cover from the fuse holders by slightly depressing the
back edge of the cover to unlatch it from the printed circuit board. Pull up on the
back edge of the cover and remove it from the fuse compartment.
5. Remove the defective fuse and replace with one having the appropriate rating
(See table 4-1 for fuse ratings and Fluke part numbers).
6. Replace the protective cover by pushing it over the fuses while aligning the
catches with the holes in the printed circuit board. Press the cover down until the
catches engage the printed circuit board.
7. Replace the fuse door and secure it by tightening the retaining screw.
Fuses
A1 F2
A1 F1
Bottom front
left corner
caw020.eps
Figure 2-2. Current Input Fuse Replacement
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