Fluke 80 Series III - Measurement Procedures; Measuring AC and DC Voltage

80 Series III
Service Information
12
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
z input terminal, and touch the probe to the
A input terminal. (Because the receptacles of the input terminals contain split
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 (overload), replace the fuse and test again. If the display
reads any other value, further servicing is required.
3. To test F1, move the probe from the
A input terminal to the mA
µ
A input terminal.
The display should read between 0.995 kΩ and 1.005 kΩ.
If the display reads a high resistance or
OL (overload), replace the fuse and test
again. If the display reads any other value, further servicing is required.
87
TRUE RMS MULTIMETER
MIN MAX RANGE HOLD
H
HzREL
mA
A
mV
V
V
OFF
!
!
A
COM
V
mA µA
1000V MAX
400mA MAX
FUSED
10A MAX
FUSED
PEAK MIN MAX
µA
CAT II
!
1000V MAX
CAT II
87
TRUE RMS MULTIMETER
MIN MAX RANGE HOLD
H
HzREL
mA
A
mV
V
V
OFF
!
!
A
COM
V
mA µA
1000V MAX
400mA MAX
FUSED
10A MAX
FUSED
PEAK MIN MAX
µA
CAT II
!
1000V MAX
CAT II
Good F2 fuse: 00.0Ω to
00.5Ω
Good F1 fuse: 0.995 KΩ to
1.005KΩ
Replace fuse: OL
Replace fuse: OL
Touch top half
of input contacts
IY5f.eps
Figure 3. Testing the Current Input Fuses