45
Service Manual
3-6
1000V CAT
FUSE F1
500 mA
F 250V
FUSED
600V CAT
10A
100
mA
V
COM
Front Panel Input Terminal
100 mA Input Socket
Fuse Holder
To remove, push in and turn counter clockwise.
To insert, reverse this procedure.
F1 Fuse (500 mA, 250V, Fast Blow)
1500 A Minimum Breaking Capacity
qb13f.eps
Figure 3-2. Replacing the External 100 mA Input Fuse (F1)
Table 3-1. Fuses
Item Description Fluke Part No.
WF1 100 mA Input Fuse. F 500 mA, 250 V, (fast blow), 1500 A breaking
capacity.
838151
WF2 10 A Input Fuse. F 11 A, 1000 V, (fast blow), 17,000 breaking
capacity.
943118
WF3 Line Fuse. T 125 mA, 250 V, (slow blow) 822254
WF5 100 mA Input Fuse. F440 mA, 1000 V, 10,000 A minimum interrupt. 943121
3-13. Replacing the 10 A Input Jack Fuse (F2)
The 10 A input jack is protected by an 11 A fuse (F2), located inside the meter. The
following procedure explains how to access and change this fuse. This procedure can
also be used to change F5.
1. Remove the single Phillips-head screw on the bottom of the case and the Phillips-
head screw on each side of the rear bezel.
WWarning
Opening the case may expose hazardous voltages. Always
disconnect the power cord and measuring inputs before
opening the case.
2. Remove the bezel and slip the case back from the front of the meter. The fuse and
fuse clip are visible at the front of the main printed circuit assembly (pca) near the
input terminals.
3. Carefully remove the fuse and install a properly-rated replacement.
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