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Measurement and instrumentation
CL 3005 multimeter
Ref :
291 156
ENGLISH
4. Open the circuit where the current needs to be measured. Carefully
connect the test cords in series with the load where the current needs to
be measured.
5. Power on the circuit to be measured.
6. Read the value of the current on the digital display.
7. Turn off completely the power supply to the circuit to be tested and
discharge all capacitors
8. Disconnect the test cords and reconnect the circuit just tested.
2.4 Measuring AC currents
1. Connect the red test cord to the mA socket to measure currents of up to
200 milliamperes or 10 A if greater. 0 200 mA. Connect the black test
cord to the COM socket.
2. Place the Function/Range selector switch on the desired AC and A
range. If the magnitude of the current is unknown, place the selector
switch on the highest range and reduce until a satisfactory reading is
obtained.
3. Power off the device or the circuit to be tested and discharge all
capacitors.
4. Open the circuit where the current needs to be measured. Carefully
connect the test cords in series with the load where the current needs to
be measured.
5. Power on the circuit to be measured.
6. Read the value of the current on the digital display.
7. Cut off the power supply completely to the circuit to be tested and
discharge all capacitors
8. Disconnect the test cords and reconnect the circuit just tested.
2.5 Measuring the resistance
All resistance ranges of the multimeter are in low power ohms except for the
200 ohms range. The low power ohmic ranges help obtain accurate
measurements of the resistance of in situ circuits, the test voltage being
lower than the voltage necessary for the operation of a diode junction. Note:
in the 200 Ω range, the continuity tester function is activated.
1. Connect the red test cord to the "VΩ" socket and the black test cord to
the "COM" socket.
2. Place the Function/Range selector switch on the desired Ω range. If the
magnitude of the resistance is unknown, place the selector switch on the
highest range and reduce until a satisfactory reading is obtained.
3. If the resistance measured is connected to a circuit, disconnect the circuit
to be tested and discharge all capacitors.
4. Connect the test cords to the circuit to be tested. In case of measurement
of high resistances, do not touch the adjacent points even if they are
insulated, because some insulating materials have a relatively low
insulating resistance, making the resistance measured lower than the
actual resistance.
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