Velleman DCM268N Bedienungsanleitung Seite 9

AC (TRUE RMS)/DC CURRENT MEASUREMENT

Make sure no test leads are connected to the V·Ω·CAP·TEMP·HZ jack
[11] or COM jack [10].

Set the rotary switch [3] in the desired range (
or
set the range switch in the highest range position and then reduce
gradually until the ideal resolution is obtained.

Use the mode button [5] to choose between AC and DC current.

For DC current measurements, press the DCA zero button [7] once to
reset the display to zero for relative measurements (indicated with
the display).

Press the trigger [2] to open the jaws [1] of the clamp. Enclose a single
conductor within the clamp and release the trigger [2]. Enclosing
multiple conductors at the same time will result in faulty measurements.
For accurate measurements, always keep the jaws closed during
measuring.

Read the current value on the LCD display.

Note that when measuring large currents, a buzzing sound may be heard
coming from the jaws. This is normal behaviour which does not influence
the measurement accuracy.
RESISTANCE, AUDIBLE CONTINUITY and DIODE TEST

Connect the red test lead to the V·Ω·CAP·TEMP·HZ jack [11] and the
black lead to the COM jack [10].

Set the rotary switch [3] in the

Make sure there is no voltage on the circuit/component under test.

For resistance test press the mode button [5] until the Ω symbol appears
(default) in the display. Connect the test leads to the resistor to be
measured and read the value in the LCD display. Disconnect one side of
the device under test to avoid interference from the rest of the circuit.

For continuity test, press the mode button [5] until the
appears in the display. Connect the test leads to the circuit to be
measured and read the value in the LCD display. When the resistance is
<35Ω, a continuity buzzer will sound.
Note: test current: <1mA

For diode/transistors/ semiconductors/... measurements, press the mode
button [5] until the
measurement, a current is sent through the semiconductor junction and
the voltage drop is measured. When the junction passes the test,
indicated forward voltage will be 0.4~0.9V while reverse voltage will
V. 02 – 20/08/2018
). If the current to be measured is unknown beforehand,
symbol appears in the display. During
DCM268N
position.
9
,
in
symbol
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