Current-Input Fuses - Tektronix DMM4040 User Manual

Line Voltage Selection
100 / 120
220 / 240

Current-Input Fuses

The 400 mA and 10 A inputs are protected by user-replaceable fuses.
The 400 mA input is protected by a fuse (F2) rated at 440 mA, 1000 V (fast blow),
10,000 A minimum breaking capacity.
The 10 A input is protected by a fuse (F1) rated at 11 A, 1000 V (fast blow),
10,000 A minimum breaking capacity.
For protection against fire or arc flash, replace a blown fuse
only with one from Tektronix.
To test for a blown Current Input Fuse:
1. With the Meter powered up, plug a test lead into the V GER connector.
2. Press N.
3. Insert the other end of the test lead into the 400 mA input connector.
If the fuse is good, the Meter will read less than 200 . If the fuse is blown, the
Meter will read overload.
4. Remove the probe from the 400 mA connector and insert into the 10 A
connector.
If the fuse is good, the Meter will read less than 1 . If the fuse is blown, the
Meter will read overload.
To replace the Current Input fuses,
Table 2-1. Line Voltage to Fuse Rating
Fuse Rating
0.25 A, 250 V (slow blow)
0.125 A, 250 V (slow blow)
Figure 2-1. Replacing the Line Fuse
W Warning
Preparing the Meter for Operation
Power Considerations
Tektronix Part No.
159-0187-00
159-0063-00
2
caw0201f.eps
2-5