6
Note: With no resistance connected
across the test leads (meaning
resistance is infinite),
E$<
E$<
E$<
E$<
appears when
you set the meter to measure
resistance. This is normal.
4. Touch the test leads across the circuit
you want to measure, or remove one of
the leads of the component you want to
measure from its circuit and touch the
test leads across the component. If the
meter is set to automatic range control, it
automatically moves to the proper
range.
If you set the meter to use manual range,
repeatedly press
RANGE
to set manual-range
control and change the range (if necessary).
Notes:
• If you are measuring resistance of about
1M
Ω
or more, the display might take a
few seconds to stabilize. This is normal.
• As with the voltage range, use the
measuring units that appear on the
display to determine the current
resistance range. If only
Ω
appears, the
values of the measurements are in
ohms. If
AAAA
and
Ω
appear, the meter is
measuring kilohms (1 kilohm = 1000
Ω
).
If
C
C
C
C
and
Ω
appear, the meter is
measuring megohms (1 megohm =
1,000,000
Ω
).
Hint: If you want to accurately measure a
very small resistance, you can view the
resistance of the meter’s test leads, then
subtract that resistance from the measured
value. To measure the meter’s internal
resistance, simply touch the end of the test
leads together. The meter selects the 400
Ω
scale and displays its internal resistance.
You can also use the meter’s relative
function to do this (see “Using Relative
Measurement” on Page 4).
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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.
Caution: 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.
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 repeatedly pressing
SELECT
until
nF
or
µ
F
appears.
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.
Note: Electrolytic capacitors have
positive and negative terminals. Be sure
to connect each test lead to the correct
terminal to match the polarity of these
capacitors.
5. Read the measured value on the display.
Notes:
• The voltage applied across electrolytic
capacitors will affect their measured
values. That is, a meas-urement taken
with a low voltage will be different and
lower than that taken with a voltage that
approaches 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 actual input capacitance of
your meter. To measure low capacitance
values, use the meter’s relative feature
to adjust the meter for the meter’s own
capacitance (see “Using Relative
Measurement” on Page 4).
• The accuracy of capacitance
measurement depends on the
measurement method and also differs
with different types of capacitors. The
meter’s measurement is for reference
only.
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106+07+6;
Caution: Do not connect the test leads to a
source of voltage with the selector set to
–
/
„
. This could damage the meter or the
circuit being tested.
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,
repeatedly press
SELECT
until
–
appears at the top of the display.
4. Touch the test leads across the circuit
you want to measure.
Shrt
appears and
the buzzer sounds if the circuit
resistance is less than about 50 ohms
(meaning the circuit is continuous or
shorted).
Open
appears and the meter’s
buzzer does not sound if the circuit
resistance is greater than about 50
ohms (meaning the circuit is not
continuous).
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This procedure lets you check diodes,
transistors, and other semiconductors for
opens, shorts, and normal operation. It also
lets you determine the forward voltage and
polarity for diodes. (This is handy when you
need to match a diode). You can also check
LEDs using this procedure.
Caution: 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.
1. Remove all power from the circuit under
test and discharge all capacitors.
2. Rotate the function selector to
–
/
„
.
3. To select the diode function, repeatedly
press
SELECT
until
„
appears on the
top of the display.
4. Connect the test leads to the device you
want to check, or remove one of the
leads of the component you want to
measure from its circuit and connect the
test leads to the component. Note the
first reading.
5. Reverse the test leads and note the
second reading.
If one reading shows a value and the other is
overrange (
E$<
E$<
E$<
E$<
appears) the device is good. If
E$<
E$<
E$<
E$<
appears during both readings, the device
is open. If both values are very small or zero,
the device is shorted.
Notes:
• When you test a silicon-type
semiconductor, the values might vary
depending on the temperature.
• The values that appear during a diode
check show the actual forward voltage
(2.0V max). If the voltage exceeds 2.0V,
E$<
E$<
E$<
E$<
appears. This means the diode
check cannot be made using this meter.
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Many diodes have a stripe or mark on one
side. The marked side of the diode indicates
the diode’s cathode or negative (
–
) side. The
other side is the anode or positive (+) side.
If a diode is not marked, you can use your
meter to check the diode’s polarity. As you
follow the steps under “Checking Diodes” on
Page 6, connect the red test lead to one side,
connect the black test lead to the other side,
then measure and note the voltage. Then
reverse the test leads and measure and note
the second reading. The side of the diode
where the meter shows a higher voltage
using the red test lead is the anode (+) side.