Testing Fuses (F1 And F2) - Fluke 87 III Series Service Information

80 Series III
Service Information

Testing Fuses (F1 and F2)

To test the internal fuses of the Meter, refer to Figure 3 and do the following:
1. Turn the rotary selector switch to the ReE position.
2. To test F2, plug a test lead into the Vinput terminal, and touch the probe to
3. To test F1, move the probe from the
12
the input terminal. (Because the receptacles of the input terminals contain split
A
contacts, be sure that you touch the probe to the half of the receptacle contact that is
nearest the LCD.)
The display should indicate between 00.0 Ω and 00.5 Ω.
If the display reads
OL
reads any other value, further servicing is required.
The display should read between 0.995 kΩ and 1.005 kΩ.
If the display reads a high resistance or
again. If the display reads any other value, further servicing is required.
Good F2 fuse: 00.0Ω to
Replace fuse: OL
Touch top half
of input contacts
Good F1 fuse: 0.995 KΩ to
Replace fuse: OL
Figure 3. Testing the Current Input Fuses
(overload), replace the fuse and test again. If the display
A input terminal to the
OL (overload), replace the fuse and test
00.5Ω
1.005KΩ
mA µA
input terminal.
87
TRUE RMS MULTIMETER
MIN MAX RANGE HOLD H
REL Hz
PEAK MIN MAX
mV
mA
V A
µA
V
OFF
mA µA
A COM V
!
400mA MAX
CAT II
FUSED
10A MAX 1000V MAX
FUSED
!
87 TRUE RMS MULTIMETER
MIN MAX RANGE HOLD H
REL Hz
PEAK MIN MAX
mV
mA
V A
µA
V
OFF
mA µA
A COM V
!
400mA MAX
CAT II
FUSED
10A MAX 1000V MAX
FUSED
!
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