Estimating Capacitance Values Over 5 Microfarads - Fluke 80 Series III User Manual

80 Series III
Users Manual
To estimate capacitance values above 5 F, use the
current supplied by the meter's resistance function,
as follows:
1. Set up the meter to measure resistance.
Press Kto select a range based on the
2.
value of capacitance you expect to measure
(refer to Table 6.)
3. Discharge the capacitor.
4. Place the meter's leads across the capacitor;
then time how long it takes for the display to
reach OL.
5. Multiply the charge time from step 4 by the
appropriate value in the F/second of Charge
Time column in 6. The result is the estimated
capacitance value in microfarads ( F).
20
Table 6. Estimating Capacitance Values Over
5 Microfarads
Expected Capacitance
Up to 10 F
11 F to 100 F
101 F to 1000 F
1001 F to 10,000 F
10,000 F to 100,000 F
*
These ranges keep the full-charge time between 3.7 seconds
and 33.3 seconds for the expected capacitance values. If the
capacitor charges too quickly for you to time, select the next
higher resistance range.
F/second
Suggested of Charge
Range* Time
4 Me 0.3
400 ke 3
40 ke 30
4 ke 300
400 e
3000