Maintenance 5
Agilent U1251A/U1252A User’s and Service Guide 113
Fuse Replacement
The following procedures will assist you to replace the fuse
of the meter.
1 Turn the meter off and disconnect the test leads from
external equipment. Make sure the adaptor is removed.
2 Use clean/dry gloves on your hands and do not touch any
components except the fuse and plastic parts. The current
calibration is considered shunt only, so it’s not
recommended to recalibrate the meter after replacing the
fuse.
3 Remove the battery cover compartment to replace the
fuse.
4 Loosen 2 screws on bottom case and remove the cover.
5 Lossen two screws on top corners to lift the circuit board.
6 Gently remove the defective fuse by prying one end of the
fuse loose and removing it out of the fuse bracket.
7 Replace a new fuse of the same size and rating. Make
sure the new fuse is centered in the fuse holder.
8 Ensure that the rotary switch on the top case and circuit
board switch stay on the OFF position.
9 Then re- fasten the circuit board and the bottom cover
respectively.
10 Refer to the table below for the part number, rate and
size of the fuses.
NOTE
This manual provides only the fuse replacement procedures, but not the
fuse replacement markings.
Fuse Agilent Part Number Rating Size Type
1 2110-1400 440mA/1000V 10 mm x 35 mm Fast blow Fuse
2 2110-1402 11A/1000V 10 mm x 38 mm
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