Replacing The Fuses; Line-Power Fuse - Tektronix DMM4040 Safety And Installation Instructions Manual

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Replacing the Fuses
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The Meter uses one fuse to protect the line-power input and two fuses to protect current ­
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measurement inputs.
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Line-Power Fuse
The Meter has a line-power fuse in series with the power supply. Table 1 indicates the
proper fuse for each of the four line-voltage selections. The line-power fuse is accessed
through the rear panel.
I. Unplug the power
cord.
2. Insert a small screwdriver blade into the narrow recess to the left of the fuse
holder and pry it to the right until the holder pops out. See Figure 2.
3. Remove the fuse and replace it with a fuse of an appropriate rating for the
selected line-power voltage. See Table I .
4. Replace the selector block back into the fuse holder.
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Warning
To avoid electric shock or fire, do not use makeshift fuses or
short-circuit the fuse holder.
Table 1. Line Voltage to Fuse Rating
Line Voltage Selection
Fuse Rating
100/120
0.25 A, 250 V (slow blow)
220/240 0.125 A, 250 V (slow blow)
eu e20 .e ps
Figure 2. Replacing the Line·Power Fuse
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