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5. OpERATING INSTRUCTIONS
5.1 AC and DC Voltage Measurement
1) Set the rotary switch to the voltage position (V / V-).
2) Insert the black test lead into the negative
COM
jack; insert the red test lead into the
positive
V/
Ω
mA
jack.
3) The polarity of red test lead connection will be indicated when making DC Voltage
measurement.
5.2 Current Measurement
1) Remove the power from the circuit under test and discharge any capacitors of the
circuit, set the rotary switch to suitable current measuring range.
2) Insert black test lead into the negative
COM
jack, for current measurement less than
200mA insert the red test lead into the mA jack, for current measurement between
200mA to 10A insert the red test lead into 10A jack.
5.3 Diode Test and Buzzer Check
Disconnect power to the unit under test and discharge all capacitors before taking diode test.
1) Set the rotary switch to
position.
2) Insert the black test lead into the negative
COM
jack, insert the red test lead into the
positive
V
Ω
mA
jack.
Diode test:
•
place the red test lead on the anode of diode and black test lead on the cathode of
diode, the meter will show the approx. forward voltage of diode, reverse voltage will
indicate
OL
.
Buzzer test:
•
Touch the test probe tips to the circuit or wire you wish to check, the max. value of re-
sistance under check will be showed in display, if the resistance is less than 70
Ω
±30
Ω
,
the audible signal will sound.
5.4 Resistance Measurement
Disconnect power to the unit under test and discharge all capacitors before taking any
resistance measurements. Remove the batteries and unplug the line cords.
1) Set the rotary switch to the desired resistance range.
2) Insert the black test lead into the negative
COM
jack, insert the red test lead into the
positive
V
Ω
mA
jack.
3) 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.
NOTE: In an open circuit, the meter will display OL.