Velleman DVM68 Notice D'emploi page 9

Continuity test
Press the /
•
Connect the test leads to the circuit under test.
•
When the measured resistance is less than 50R a continuous beep is pr
•
resistance value is showed on the display. Should the measured resista
selected range or in case of an open circuit, the display will show "OL".
Diode test
Press the /
•
Connect the red test lead to the anode; connect the black test lead to t
•
diode. The meter will display the approximate forward voltage drop. If
reversed, the meter will display "OL".
Notes:
Never perform continuity or diode measurements on a live circuit a
•
capacitors are completely discharged.
Measuring diodes that are part of a circuit might produce faulty res
•
disconnecting them from the circuit.
7.5 Capacitance measurements
Do not perform capacitance measurements on live circuits.
Connect the red test lead to the "mA Cx" jack and the black lead to the
•
Set the rotary switch to nF or IF.
•
Connect the test probes to the capacitor. Mind the polarity when measu
•
capacitors.
The capacitance value is shown on the display.
•
Notes:
It takes a few seconds before the meter stabilizes. This is normal b
o
The range control mode in capacitance measurement is manual ran
o
ranges (326nF, 32.6IF) are provided.
If Range Control Button is used in this measuring function, decimal
o
incorrect positions.
At the nF range, when the capacitor to be measured is not connecte
o
LCD may not read zero, but a few counts. These counts have to be
measuring results.
When the capacity is higher than the measuring range, the display
o
Never perform capacitance measurements on a live circuit and mak
o
are completely depleted.
7.6 Frequency measurements
Do not perform frequency measurements in circuits with vol
III of 1000V CAT II
Always be careful when working with voltages above 60Vdc or 30V
fingers behind the probe barriers at all times during measurement.
terminals when the meter is linked to a circuit which is being tested
Connect the red test lead to the "VJF" jack and the black lead to the "
•
Set the rotary switch to Hz.
•
Connect the test probes to the circuit.
•
The frequency is shown on the display.
•
Notes:
The input voltage should be between 200mV and 10V rms AC. If th
o
10V rms, reading may be out of the accuracy range.
When the frequency is higher than the measuring range, the displa
o
Use a shielded cable for measuring small signals in a noisy environm
o
25.02.2011
.button until the
.button until the
DVM68
symbol appears on the display.
symbol appears on the display.
9
Rev. 01
s produced and the
istance exceed the
".
o the cathode of the
If the lead connection is
t and make sure all
esults. Consider
the "COM" jack.
asuring polarized
l behavior.
ranging and only two
al points may be at
cted to test leads, the
be substracted from
ay shows 'OL'.
ake sure all capacitors
voltages > 600V CAT
0Vac rms. Keep your
nt. Do not touch unused
ted.
e "COM" jack.
the voltage is more than
play shows 'OL'.
onment.
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