Velleman DVM68N Notice D'emploi page 6

3. Operating instructions
3.1 Measuring Voltage
1) Connect the black test lead (-) to the COM jack and the red test lead (+) to the V/Ω/F/Cx jack.
2) Set the function switch at V
measurement.
3) Read LCD display. The polarity of red connection will be indicated when making a DC measurement.
3.2 Measuring Current
1) Connect the black test lead (-) to the COM jack and the red test lead (+) to the mA jack for a maximum of 400mA.
For a maximum of 10A, move the red lead to the A jack.
2) Set the function switch at µ A, mA or A range to be used and push
3) Connect test leads IN SERIES with the load in which the current is to be measured.
4) Read LCD display. The polarity of red lead connection will be indicated when making a DC measurement.
3.3 Measuring Resistance
1) Connect the black test lead (-) to the COM jack and the red test lead (+) to the V/Ω/F/Cx jack.
2) Set the function switch at Ω range to be used and connect test leads across the resistance under measurement.
Remarks:
1) For measurements in the 40MΩ range, it may take a few seconds to stabilize reading. This is normal for high
resistance measuring.
2) When the input is not connected, i.e. at open circuit, the figure "OL" will be displayed for the overrange condition.
3) When checking in-circuit resistance, be sure the circuit under test has all power removed and all capacitors are
fully discharged.
3.4 Measuring Capacitance
1) Connect the black test lead (-) to the COM jack and the red test lead (+) to the V/ /F/Cx jack.
2) Set the function switch at CAP position to be used.
3) Connect test leads across the capacitor under measurement and be sure that the polarity of connection is
observed.
Remarks:
To avoid electrical shock and/or damage to the instrument, disconnect circuit power and
discharge all high-voltage capacitors before measuring capacitance. Use the dc voltage
function to confirm that the capacitor is discharged.
Capacitance is the ability of a component to store an electrical charge. The unit of capacitance is the farad (F). Most
capacitors are in the nanofarad to microfarad range. The meter's capacitance ranges are 4.000nF, 40.00nF, 400.0µF,
4.000µF, 40.00µF and 200.0µF.
To measure capacitance:
1) Set the rotary switch to the CAP range.
2) Connect the black and red test leads to the COM and Cx terminals respectively. You can also measure the
capacitance by using the special multi-function socket.
3) Connect the test leads to the capacitor being measured and read the displayed value.
Some tips for measuring capacitance:
• The meter may take a few seconds to stabilize the reading. This is normal for high-capacitance measuring.
• To improve the accuracy of measurements less than 4nF, subtract the residual capacitance of the meter and
leads.
DVM68N
or V∼ range to be used and connect test leads across the source or load under
/ ∼ button to select DCA or ACA mode.
6 VELLEMAN