8
7
6.1. DC VOLTAGE MEASUREMENTS
CAUTION:
Do not measure DC voltages if a motor on the circuit is
being switched ON or OFF. Large voltage surges may occur
that can damage the meter.
1. Set the function switch to the "
DC
" position.
2. Insert the black test lead banana plug into the
negative
COM
jack. Insert the red test lead
banana plug into the positive
V
jack.
3. Touch the black test probe tip to the negative side
of the circuit. Touch the red test probe tip to the
positive side of the circuit.
4. Read the voltage in the display.
6.2. AC VOLTAGE (FREQUENCY, DUTY CYCLE) MEASUREMENT
CAUTION:
Do not measure AC voltages if a motor on the circuit is
being switched ON or OFF. Large voltage surges may occur
that can damage the meter.
1. Set the function switch to the
VAC/Hz/%/VFD
position, indicate
"
AC
" on the display.
2. Insert the black test lead banana plug into the
COM
input jack; insert
the red test lead banana plug into the
Positive
input jack.
3. Position the black test probe tip and red test probe tip respectively in
the spots of the circuit to be measured
4. Read the voltage on the display.
5. Press and hold the
MODE
Button key for 2 seconds to indicate "VFD"
on the display.
6. Read the VFD value on the display.
7. To exit VFD mode press and hold the MODE Button for 2 seconds.
8. Press the
Hz/%
Button to indicate "
Hz
".
9. Read the frequency in the display.
10. Press the
Hz/%
Button again to indicate "
%
".
11. Read the % of duty cycle in the display.
WARNING:
Risk of Electrocution. The probe tips may not be long
enough to contact the live parts inside some 240V outlets for appliances
because the contacts are recessed deep in the outlets. As a result, the
reading may show 0 volts when the outlet actually has voltage on it. Make
sure the probe tips are touching the metal contacts inside the outlet
before assuming that no voltage is present.
1. Set the function switch to the position.
2. Insert the black test lead plug into the negative (COM) socket and the
red test lead plug into the positive n jack.
3. Press the MODE button until "Ω" appears on the display.
4. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit will
not interfere with the resistance reading.
5. Read the resistance on the display. The display will indicate the proper
decimal point, value and symbol.
3.11. CONTINUITY CHECK
1. Set the range switch to the position.
2. Insert the black test lead plug into the COM socket and the red test lead
plug into the positive socket.
3. Press the MODE button until " " appears on the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than 50Ω, the audible signal will sound. The
display will also show the actual resistance in ohms.
3.12. DIODE TEST
1. Set the function switch to the position.
2. Insert the black test lead plug into the COM socket and the red test lead
plug into the socket.
3. Press the MODE button until " " appears on the display.
4. Touch the test probe tips to the diode or semiconductor junction you
wish to test. Note the meter reading.
5. Reverse the probe polarity by switching probe position. Note this
reading.
6. The diode or junction can be evaluated as follows:
A. If one reading shows a value and the other reading shows OL, the
diode is good.
B. If both readings show OL, the device is open.
C. If both readings are very small or zero, the device is shorted.
NOTE:
The value indicated on the display during the diode check is the
forward voltage.
WARNING:
To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
WARNING:
To avoid electric shock, do not test any diode that has
voltage on it.