Testing the Fuses
3 A Current Path
To determine whether the instrument's 3 A current path has a fuse that must be replaced, press [Cont] to put the
DMM in continuity measurement mode, and short the HI Input terminal to the 3 A current terminal. If the
measurement displays OPEN, one of the two fuses must be replaced. One fuse is accessible from the instrument's rear
panel; the other is internal.
If the 3 A current path has a bad fuse, it is very likely to be the fuse accessible from the lower left corner of the
instrument's rear panel (part number 2110-1547, 3.15 A, 500 V, time delay). Simply use a flat-blade screw driver to
turn the fuse holder counter-clockwise and access the fuse. Put the new fuse into the fuse holder and insert the
assembly back into the instrument, turning the fuse holder clockwise to lock it in place.
If the 3 A path still has a bad fuse, replace the internal 3 A current path fuse as described below.
10 A Current Path (34461A only)
To determine whether the instrument's 10 A current path has a fuse that must be replaced, press [Cont] to put the
DMM in continuity measurement mode, and short the HI Input terminal to the 10 A current terminal. If the
measurement displays OPEN, replace the internal 10 A current path fuse as described below.
Agilent Truevolt Series DMM Operating and Service Guide 305
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