Triplett 9045 - Manual (Page 26)

26 Triplett Model 9045
7.2.8 Measuring Capacitance
WARNING!!!
Do not connect a charged capacitor to the meter.
Doing so may damage the meter or injure the user.
Do not apply voltage or current to the meter when the
FUNCTION switch is set to
7.2.8.1 Connect the black test lead to the COM jack, and the red test lead to the
jack.
7.2.8.2 Set the FUNCTION switch to the position. Press the SELECT
button, repeatedly if necessary, to select the Capacitance Test mode. The nF
annunciator will turn on when the Capacitance Test mode is selected.
7.2.8.3 Before testing capacitor, be certain it is discharged and disconnected
from any other circuitry that may cause an erroneous measurement.
WARNING!!!
Use an approved method to discharge the capacitor. Some capacitors can
hold a dangerous charge, and discharging them inappropriately can be
hazardous to the user.
7.2.8.4 When measuring values less than 40nF, consider using the REL feature
to “null out” any residual reading. Residual readings of 100 to 150 counts
(1.00 to 1.50nF) are typical. Refer to section 7.1.5.
7.2.8.5 Connect the test leads to the capacitor to be tested. Read the measured
value from the LCD display.
Note: Capacitors larger than 100uf will take some time to measure. 1000uf will
take between 10 and 20 seconds to measure.
If the display indicates OL, the capacitor is larger than the meter will measure, or
it is leaky or shorted.
Measurements on capacitors with values less than 10nF are not accurate.