Voltage Measurements; Current Measurements - Jeulin CL 3020 Manual

Measurement and instrumentation
CL 3020 multimeter
Ref : 291 175
ENGLISH
3.1 Characteristics of retaining the maximum
value
Press on «MAX» to activate or deactivate the Retaining Maximum Value
mode (retaining the highest value read). In MAX mode, the MAX indicator is
displayed and the maximum measured values are stored in the display
register. If the new value read is greater than the displayed value, the higher
value is transferred to the display register. «Greater» value signifies the
measurement whose absolute value is the highest.
Retaining the maximum value function is also available in frequency meter
mode. The automatic range change is deactivated when retaining the
maximum value is activated.
3.2 Measuring capacitance and inductance
1. Place the Function/range selector switch on the desired capacitance (F) or
inductance (L) range.
2. Never apply an external voltage on the Cx Lx connections, as there is a
risk of damaging the device.
3. Insert the pins of the capacitor or inductor directly into the Cx Lx
connectors.
4. Read the capacitance or inductance directly on the display.

3.3 Voltage measurements

1. Connect the red test cord to the "V" socket and the black test cord to the
"COM" socket.
2. Place the Function/Range selector switch on the desired voltage range
and press the AC/DC button to change from AC voltage to DC voltage and
vice versa. If the value of the voltage is unknown, place the selector switch
on the highest range of values and reduce until a satisfactory reading is
obtained.
3. Connect the test cords to the device or to the circuit to be measured.
4. For DC voltages, a (-) sign is displayed for negative polarity; the positive
polarity is by default.

3.4 Current measurements

1. Place the Function/Range selector switch on the desired current range
and press the "AC/DC" button to change from AC current to DC current and
vice versa.
2. To measure currents less than 400 mA, connect the red test cord to the
"µAmA" socket and the black test cord to the "COM" socket.
3. For measurements of current equal to or greater than 400 mA, connect
the red test cord to the "A" socket and the black test cord to the "COM"
socket.
4. Disconnect the power supply of the circuit to be tested and open the
normal circuit at the spot where the measurement needs to be performed.
Connect the device in series with the circuit.
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