Testing The Fuses - Fluke 77 Calibration Information Manual

Testing the Fuses

To avoid electrical shock or personal injury:
•
Remove the test leads and any input signals before replacing the battery or
fuses.
•
To avoid electrical shock, arc blast, or damage to the Meter, install only
fuses with the amperage, interrupt, voltage, and speed ratings specified in
Table 4.
To test the fuses (refer to Figure 1):
1. Set the Rotary Switch to e.
2. Plug a test lead into the VeG terminal and touch the probe to the
terminal to test the 11 A Fuse.
10 A
•
If the display shows a resistance value in the range shown in Figure 1, the fuse is good.
•
If the display reads
•
If the display shows any other value, have the Meter serviced. See "Service Information" earlier in
this manual.
XWWarning
, replace the fuse and test again.
OL
<12
HOLD MIN MAX RANGE
V
Figure 1. Testing the Current Fuses
440 mA
Ω
OK
<0.5
OK
Digital Multimeter
Testing the Fuses
to test the 440 mA Fuse or
400 mA
11 A
OK
OK
aik12f.eps
7