Velleman DVM68N Notice D'emploi page 7

3.5 Measuring Frequency
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 the Hz position and connect test leads across the source or load under measurement.
Remark:
The input voltage should be between 600mV and 3V rms AC. If the voltage is more than 10V rms, reading may be
out of the accuracy range.
Max. input voltage: 250V.
3.6 Continuity & Diode Test
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
3) In continuity testing, if continuity exists (i.e. resistance less than about 50Ω), built-in buzzer will sound.
4) If diode test mode is selected, connect the red and black to the anode and cathode of the diode under test. The
forward voltage drop of this diode in V will be displayed.
3.7 Transistor Test
1) Set the function switch at hFE position.
2) Identify whether the transistor is NPN or PNP type and locate emitter, base and collector lead. Insert leads of the
transistor to be tested into proper holes of the testing socket on the front panel.
3) LCD display will show the approximate hFE value at the test condition of base current 10 µ A and Vce 2.8V.
4. Specifications
Accuracy is specified for a period of one year after calibration and at 18°C to 28°C with relative humidity to 75%.
4.1 General
Max. voltage between terminal and earth
Display
Fuse protection
Power Supply
Ranging method
Polarity indication
Overrange indication
Low Battery indication
Operating temperature
Storage temperature
Dimensions
Weight
4.2 DC Voltage
Range
400mV
4V
40V
400V
1000V
Input impedance: 10M
Max. input voltage: 1000V DC or 750V AC rms
DVM68N
/ position and push the
1000V DC or 750V AC rms (sinus)
3 ¾ digit LCD, 3 readings / sec
µ A & mA range : F 500mA/250V Ø5x20
A range : F 10A/250V Ø6.3x32
9V
Auto / Manual
" - " displayed
" OL " displayed automatically
" " displayed
0°C to 40°C (32°F to 122°F)
-10°C to 60°C (14°F to 140°F)
91 x 189 x 31.5 mm
310 g (incl. battery)
Resolution
0.1mV
1mV
10mV
100mV
1V
/ button to select continuity or diode test mode.
battery (type 6F22)
Accuracy
± (0.7% of rdg + 2 digits)
± (0.8% of rdg + 2 digits)
7 VELLEMAN