Technical data

Service and Maintenance 2
Checking the Fuse
U1270 Series Service Guide 53
Checking the Fuse
It is recommended that you check the fuse(s) of the
multimeter before using it. Follow the instructions below to
test the fuses inside the multimeter.
1 Turn the rotary switch to the or position and
connect the red test lead to the Ω input terminal.
2 To test Fuse 1, place the tip of the test probe on the top
half of the
µA mA input terminal. Ensure that the probe
tip touches the metal inside the
µA mA input terminal, as
shown in Figure 2- 1.
3 To test Fuse 2, place and touch the tip of the test probe
on the left half of the
A input terminal. Ensure that the
probe tip touches the metal inside the
A input terminal,
as shown in Figure 2- 2.
4 Observe the reading on the instrument's display. Refer to
Table 2- 2 below for the possible readings that could
appear. Replace the fuse when OL is displayed.
NOTE
Refer to Figure 2-5 for the respective positions of Fuse 1 (10 × 35 mm,
440 mA/1000 V fast-acting fuse) and Fuse 2 (10 × 38 mm, 11 A/1000 V
fast-acting fuse).
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