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3. OPERATION
WARNING! Ensure that you read, understand and apply the safety and operational instructions before connecting the multimeter.
only when you are sure that you understand the procedures, is it safe to proceed with testing.
operating temperature range 0°C to 40°C.
If the battery sign
NOTE: when the figure '1' is displayed, it indicates an over-range situation and a higher range needs to be selected.
use the hold button to hold the displayed test reading, press button again to return to normal setting.
Switch on the multimeter each time immediately before measuring and turn it off when completed.
3.1.
MEASURING VOLTAGE
3.1.1. Connect the black test lead to the CoM input socket and the red test lead to the V/Ω input socket.
3.1.2. Set the rotary switch to the required V
measurement.
3.1.3. Turn on the power to the device or circuit, the voltage measured will be displayed. The polarity of the red test lead connection will be
indicated when measuring DC voltages.
NOTE: At low voltage settings, the display may show fluctuating readings when the probes are not connected, due to the sensitivity of
the multimeter. If a circuit of over 600V is accidently measured, the buzzer will sound as a warning.
3.2.
MEASURING CURRENT
3.2.1. Connect the black test lead to the CoM input socket and the red test lead to either the mA input socket for measuring a maximum of
200mA or the 10A input socket for measuring a maximum of 10A.
3.2.2. Set the rotary switch to the required A
with the circuit under measurement, open the circuit and the current measured will be displayed.
NOTE: The polarity of the red lead connection will be indicated when measuring dc current.
3.3.
MEASURING RESISTANCE
3.3.1. Connect the black test lead to the CoM input socket and the red test lead to the V/Ω input socket (the polarity of the red lead is '+').
3.3.2. When checking in-circuit resistance, ensure that the circuit under test has all power removed and all capacitors have been fully
discharged.
3.3.3. Set the rotary switch to the required Ω range and connect the test leads across the resistance under measurement. The resistance
measured will be displayed.
3.3.4. When measuring resistance over 1MΩ, the meter may take a few seconds to get a stable reading. This is normal for high resistance
measurements.
3.4.
DIODE TESTING
3.4.1. Connect the black test lead to the CoM input socket and the red test lead to the V/Ω input socket (the polarity of the red lead is '+').
3.4.2. Set the rotary switch to the
under test. The display will show the forward voltage drop of the diode. If the probes are reverse connected, a figure '1' will be displayed.
3.5.
TRANSISTOR TESTING
3.5.1. Determine whether the transistor to be tested in nPn or PnP type and locate the Emitter, Base and Collector leads. Insert leads of the
transistor into the correct sockets in the external transistor testing socket. Connect the black lead to the CoM input socket and the red
lead to the V/Ω input socket. Insert the probes correctly into the external tester. Set the rotary switch to the hFE position.
3.5.2. The display will show the approximate hFE value at test conditions of base current 10µA and Vce 2.8V.
3.6.
AUDIBLE CONTINUITY TEST
3.6.1. Connect the black test lead to the CoM input socket and the red test lead to the V/Ω input socket (the polarity of the red lead is '+').
3.6.2. Set the rotary switch to the
resistance less than about 30Ω) the built-in buzzer will sound.
3.7.
BATTERY TESTING
3.7.1. Connect the black test lead to the CoM input socket and the red test lead to the mA input socket.
3.7.2. Set the rotary switch to the appropriate battery voltage position (1.5V or 9V). Touch the probes onto the terminals of the battery to be
tested, the display will show the voltage of the battery (a negative voltage will be shown if the probes are reversed).
resistance
range
Diode Test
Continuity
Test
Transistor
Test
Battery Test
DC Current
range
appears on the display, it indicates that the battery power is low and must be replaced, see section 5.2.
(DC) or V ~ (AC) range and connect test leads across the device or circuit under
(DC) or A ~ (AC) range (note: the 10A setting in brackets) and connect test leads in series
position and connect the red probe to the anode and the black probe to the cathode of the diode
position and connect the test leads across the two points of the circuit under test. If continuity exists (i.e.
Original Language Version
DC Voltage
range
AC Voltage
range
AC Current
range
MM24
Issue no: 2 - 02/07/10
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