Testing The Capacitance Function; Checking The Diode Test Function - Fluke 80 SERIES III Service Information

80 Series III
Service Information
Step
1
2
3
4
5
6

Testing the Capacitance Function

The Meter measures capacitance by charging the capacitor with a known direct current,
measuring the resultant voltage, and calculating the capacitance. If the same capacitance
is measured on an impedance bridge, a different reading may result. This variance is
likely to be greater at higher frequencies.
To verify the accuracy of the capacitance measuring function, do the following:
1. Connect the Calibrator to the
2. For steps 1 through 3 in Table 10:
3. Before applying the input for step 4, press Cto zero the display and
Step
1
2
3
4

Checking the Diode Test Function

To check the diode test function, do the following:
1. Connect the Calibrator to the
2. Turn the rotary switch to G.
20
Resistance
To zero resistance in leads, short probes and press REL ∆.
short
190.0Ω
19.00 kΩ
1.900 MΩ
19.00 MΩ
100.0 MΩ
a. Turn the rotary switch to ReE.
b. Press the blue button.
c. Connect the test leads to the capacitor.
d. For each input, compare the readings on the Meter display to display readings
for your Model of Meter.
The Meter selects the proper range automatically. Each measurement takes about
one second per range.
automatically subtract the residual Meter and test lead capacitance. Note that the
Relative mode puts the Meter into manual ranging.
Table 10. Capacitance Tests
Capacitance
1.0 µF
0.470 µF
0.0470 µF
4.70 nF
Table 9. Ohms Tests
Display Reading
83 III
189.0 to 191.0 189.4 to 190.6
18.91 to 19.09 18.95 to 19.05
1.886 to 1.914 1.888 to 1.912
18.78 to 19.22 18.78 to 19.22
9.80 to 10.20 nS 9.80 to 10.20 nS
z
and
COM
Display Reading
83 III
0.95 to 1.05 0.95 to 1.05
0.462 to 0.478 0.462 to 0.478
0.0462 to 0.0478 0.0462 to 0.0478
4.62 to 4.78 4.62 to 4.78
z
and COM
85 III 87 III
189.4 to 190.6
18.95 to 19.05
1.888 to 1.912
18.78 to 19.22
9.80 to 10.20 nS
inputs on the Meter.
85 III 87 III
0.95 to 1.05
0.462 to 0.478
0.0462 to 0.0478
4.62 to 4.78
inputs on the Meter.