Elenco Compact Digital Multimeter - Manual (Page 17)

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METER OPERATION
PRECAUTIONS AND PREPARATIONS FOR MEASUREMENT
1) Be sure the battery is connected to the battery
snap and correctly placed in the battery
compartment.
2) Before connecting the test leads to the circuit, be
sure the range switch is set to the correct
position.
3) Be sure that the test leads are connected to the
correct meter terminals before connecting them
to the circuit.
4) Before changing the range switch, remove one of
the test leads from the circuit.
5) Operate the instrument only in temperatures
between 0 and 50°C and in less than 80% RH.
6) Pay careful attention to the maximum rated
voltage of each range and terminal.
7) When finished making measurements, set the
switch to OFF. Remove the battery when the
instrument will not be used for a long period of
time.
8) Do not use or store the instrument in direct
sunlight or at high temperature or humidity.
1) Connect the black test lead to the “COM”
terminal.
2) Connect the red test lead to the “V
ΩmA” terminal.
3) Set the range switch to the desired “DCV” or
“ACV” position. If the magnitude of the voltage is
not known, set the switch to the highest range.
4) Connect the leads across the points to be
measured and read the display. If the range
switch is too high, reduce it until a satisfactory
reading is obtained.
VOLTAGE MEASUREMENTS
HIGH CURRENTS (200mA to 10A)
1) Connect the black test lead to the “COM”
terminal.
2) Connect the red test lead to the “10ADC”
terminal.
3) Set the range switch to the 10A position.
4) Open the circuit to be measured and connect the
leads in series with the load to be measured.
5) Read the display. If the display read less than
200mA, follow the low current procedure below.
6) Turn off all of the power to the circuit being tested
and discharge all of the capacitors before
disconnecting the test leads.
LOW CURRENTS (less than 200mA)
7) Connect the black test lead to the “COM”
terminal.
8) Connect the red test lead to the V
ΩmA terminal.
9) Set the range switch to the desired DCA position.
If the magnitude of the current is not known, set
the switch to the highest position.
10) Open the circuit to be measured and connect
the leads in series with the load to be measured.
11) Read the display. If the range switch is too high,
reduce it until a satisfactory reading is obtained.
12) Turn off all power to the circuit being tested and
discharge all capacitors before disconnecting
the test leads.
DCA MEASUREMENTS
1) Connect the black test lead to the “COM”
terminal.
2) Connect the red test lead to the “V
ΩmA” terminal.
3) Set the range switch to the desired “
Ω” position.
4) If the resistance being measured is connected to
a circuit, turn off the power to the circuit being
tested and discharge all of the capacitors.
5) Connect the leads across the resistor to be
measured and read the display. When measuring
high resistance, be sure not to contact adjacent
points even if insulated. Some insulators have
relatively low resistance and will cause the
measured resistance to be lower than the actual
resistance.
RESISTANCE MEASUREMENTS