80 Series III
Service Information
20
Table 9. Ohms Tests
Display Reading
Step Resistance 83 III 85 III 87 III
1 short To zero resistance in leads, short probes and press REL ∆.
2 190.0Ω 189.0 to 191.0 189.4 to 190.6 189.4 to 190.6
3 19.00 kΩ 18.91 to 19.09 18.95 to 19.05 18.95 to 19.05
4 1.900 MΩ 1.886 to 1.914 1.888 to 1.912 1.888 to 1.912
5 19.00 MΩ 18.78 to 19.22 18.78 to 19.22 18.78 to 19.22
6 100.0 MΩ 9.80 to 10.20 nS 9.80 to 10.20 nS 9.80 to 10.20 nS
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
z and COM inputs on the Meter.
2. For steps 1 through 3 in Table 10:
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.
3. Before applying the input for step 4, press Cto zero the display and
automatically subtract the residual Meter and test lead capacitance. Note that the
Relative mode puts the Meter into manual ranging.
Table 10. Capacitance Tests
Display Reading
Step Capacitance 83 III 85 III 87 III
1
2
3
4
1.0 µF
0.470 µF
0.0470 µF
4.70 nF
0.95 to 1.05
0.462 to 0.478
0.0462 to 0.0478
4.62 to 4.78
0.95 to 1.05
0.462 to 0.478
0.0462 to 0.0478
4.62 to 4.78
0.95 to 1.05
0.462 to 0.478
0.0462 to 0.0478
4.62 to 4.78
Checking the Diode Test Function
To check the diode test function, do the following:
1. Connect the Calibrator to the
z and COM inputs on the Meter.
2. Turn the rotary switch to G.
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