Replacing The Fuse; Table 5-3 Measurement Readings For Fuse Checking - Agilent Technologies U1251A User's Manual And Service Manual

5 Maintenance

Table 5-3 Measurement readings for fuse checking

Current input terminal

Replacing the fuse

N O T E
106
4 To test Fuse 2, place and touch the tip of the test probe
on the right half of input terminal
probe tip touches the metal inside the input terminal.
5 Observe the reading on the instrument's display. Refer to
Table 5- 3
6 Replace the fuse when OL is displayed.
Fuse Fuse rating
1 440 mA/1000 V
2 11 A/1000 V
This manual provides only the fuse replacement procedures, but not the
fuse replacement markings.
Follow the procedures below to replace the fuse.
1 Turn the meter off and disconnect the test leads from the
external equipment. Make sure to remove the adaptor.
2 Wear clean/dry gloves and do not touch any other
component except the fuse and plastic parts. The current
calibration is considered shunt only, so do not recalibrate
the meter after replacing the fuse.
3 Remove the battery cover compartment to replace the
fuse.
4 Loosen the three screws on the bottom case and remove
the cover.
5 Loosen the two screws on the top corners to lift the
circuit board.
for the possible readings that could appear).
Fuse OK (approximately)
Displayed readings
6.2 MΩ
0.06 Ω
Agilent U1251A/U1252A User's and Service Guide
. Ensure that the
Replace fuse
OL
OL