MASTER BKGRD 6-26-07
1
MASTER BKGRD 6-26-07
Taking Measurements
1. Rotate the function dial to /
µA/A
for 0.4/4mA and 4/10A ranges or /
mA/A
for 40/400mA and 4/10A ranges, and press
SELECT
to measure AC current (~
appears) or DC current (~ disappears).
(~ disappears)..
2. power off the circuit under test and discharge all capacitors.
3. plug the black test lead into
-COM
and the red test lead into the appropriate
jack. Connect the meter’s test leads in series with the circuit.
4. Apply power and read the current �alue. if the measurement is less than
400mA and the red test lead is connected to
+10A MAX
, power off the
circuit.
if your measurement e�ceeds the selected range,
OF
appears until the
measured current is reduced to the selected range.
5. Mo�e the red test lead to
+ V.mA.
Ω
.
6. Rotate the function dial to /
µA/A
or /
mA/A
depending on the �alue you
measured in Step 4.
7. Reapply power to the circuit.
if you are measuring DC current and the current’s polarity is negati�e, - appears
before the �alue.
Measuring Resistance
1. power off the circuit under test and discharge all capacitors.
2. Rotate the function dial to
/ and press
SELECT
until
(ohm),
K
(kilohm
)
,
or
M
Ω
(megohm) appears.
3 Touch tht e test leads across the resistor, or remo�e one of the leads of the
component from its circuit and touch the test leads across the resistor.
Notes
:
• With no resistance connected across the test leads (meaning resistance is infinite),
OF
appears when you measure resistance. This is normal.
• if you are measuring resistance of about 1M
Ω
or more, the display might take a few
seconds to stabilize. This is normal.
• To calculate and measure a �ery small resistance, touch the test leads together
to measure the meter’s internal resistance, and then substract this �alue from the
measurement. Refer also to
“Taking Relative Measurements”
on page 11.
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