23
Making Measurements
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The capacitance measuring circuit in your meter
charges a connected capacitor to a specific voltage
level, then discharges the capacitor to a lower
voltage. The meter measures the amount of time
takes to discharge the capacitor. .
..
.
Capacitance measurement accuracy depends on
the measurement method and differs with different
types of capacitors. The meter’s measurement is for
reference only.
1. Remove all power from the circuit under test
and discharge all capacitors.
2.
Rotate the function selector to
•
••
•
.
3.
Set the meter to measure capacitance by
pressing
SELECT
.
nF
or
µ
µµ
µ
F
appears. Then
repeatedly press
RANGE
if necessary to
manually select the range you want.
4. Attach the red test lead to the positive side of
the capacitor and attach the black test lead to
the negative side of the capacitor. Or, remove
one of the leads of the capacitor you want to
measure from its circuit and connect the test
leads to the capacitor’s matching (positive or
negative) terminals. The measured value
appears.
±
%*'%-+0)"%106+07+6;
You can use the meter to check for shorted or open
electrical circuits.
.
..
.
1. Remove all power from the circuit under test
and discharge all capacitors.
2. Rotate the function selector to
–
––
–
/
„
„„
„
.
3. To select the continuity function, press SELECT
until
–ý
–ý–ý
–ý
appears at the top of the display.
.
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.
Measuring
Capacitance
Do not connect the test leads
to a source of voltage with
the function selector set to
•
••
•
. This could damage
the meter or the circuit
being tested.
Checking Continuity
Do not connect the test leads
to a source of voltage with
the selector set to
–
––
–
/
„
„„
„
.
This could damage the meter
or circuit being tested.
±
"016'"
±
"
• The voltage applied
across electrolytic
capacitors affects their
measured values. That
is, a measurement taken
with a low voltage will be
lower than one taken
with a voltage near the
capacitor’s voltage
rating. Since this meter
cannot use high voltage
to set the electrolyte, it
cannot measure the
absolute value of
capacitance.
• Low-value capacitors
might match or be close
to the meter’s actual
input capacitance. To
measure low capa-
citance values, use the
meter’s relative feature
to adjust the meter for
(continued)
22-812.fm Page 23 Monday, April 8, 2002 1:32 PM
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