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5
Maintenance
3 To test Fuse 1, place the tip of the test probe on the right half of input terminal
4 To test Fuse 2, place and touch the tip of the test probe on the right half of
5 Observe the reading on the instrument's display. Refer to
6 Replace the fuse when OL is displayed.
Table 5-3
U1253B measurement readings for fuse checking
Current input terminal
158
. Ensure that the probe tip touches the metal inside the input terminal,
as shown in
Figure
input terminal
. Ensure that the probe tip touches the metal inside the input
terminal.
possible readings that could appear.
Fuse
Fuse rating
1
440 mA/1000 V
2
11 A/1000 V
5-8.
Fuse OK (approximately)
Keysight U1253B User's and Service Guide
Table 5-3
Displayed readings
6.2 M
0.06
for the
Replace fuse
OL
OL
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