Ac Voltage Measurements; Dc Current Measurements; Resistance Measurements; Diode Measurements - Velleman DVM830L Mode D'emploi

3.2. AC Voltage Measurements

1) Connect the red test lead to the "VΩmA" jack and the black lead to the "COM" jack.
2) Place the RANGE switch in the appropriate VAC position.
3) Connect the test leads to the device or circuit to be tested.
4) The voltage value will appear on the display.

3.3. DC Current Measurements

1) Connect the red test lead to the "VΩmA" jack and the black lead to the "COM" jack. (Connect the red test lead to
the "10A"-jack for measurements between 200mA and 10A).
2) Place the RANGE switch in the appropriate ADC position.
3) Open the circuit to be measured and connect the test leads IN SERIES with the load of which the current is to be
measured.
4) Read the current value on the display.

3.4. Resistance Measurements

1) Connect the red test lead to the "VΩmA" jack and the black lead to the "COM" jack.
2) Place the RANGE switch in the appropriate Ω position.
3) If the resistance being measured is connected to a circuit : disconnect the power and discharge all capacitors
prior to measurement.
4) Connect the test leads to the circuit to be measured.
5) Read the resistance value on the display.

3.5. Diode Measurements

1) Connect the red test lead to the "VΩmA" jack and the black lead to the "COM" jack.
2) Set the RANGE switch to the
3) Connect the red test lead to the anode and the black test lead to the cathode of the diode to be measured.
4) The forward voltage drop will be displayed in mV. "1" will be displayed if the polarity of the diode is reversed.
3.6. Transistor hFE Measurements
1) Set the RANGE switch to the hFE-position.
2) Determine whether you are dealing with a NPN or PNP transistor and locate the emitter, base and collector. Insert
the leads into the proper holes of the hFE-socket on the front panel.
3) The display will show the approximate hFE-value at the moment of testing. Parameters: base current 10µ A and Vce
2.8V.

3.7. Battery and fuse replacement

- The fuse rarely needs to be replaced and a blown fuse is nearly always due to an error on behalf of the operator.
- Replace the battery when the display reads "BAT".
- In order to replace the battery or the fuse (200mA/250V): loosen and remove the 2 screws at the back of the
device. Remove the old battery or fuse and insert a new one. Observe the polarity !
DVM830L
position.
3 VELLEMAN