PeakTech 3340 Bedienungsanleitung Seite 41

2. For measuring currents less than 400 mA, connect the red
test lead to the µA/mA input terminal. For measuring
currents between 400 mA and 20 A connect RED test lead
to the 20 A terminal.
3. Select the desired current range and select AC/DC by
pressing MODE-button.
Note:
If the 20 A range is selected then the 20 A input terminal
must be selected in step 2. If the µA, mA ranges is
selected the mA input terminal must be selected in step 2.
4. Switch OFF or disconnect the circuit to be measured from
all power sources, connect the multimeter in series with the
conductor in which the current to be measured flows.
5. Switch ON the circuit. Note the reading.
6. Switch OFF or disconnect the circuit and remove the test
leads from multimeter.
Caution!
A common abuse of multimeters in to attempt to measure a
voltage while the test leads are still plugged into the current
input terminals. This basically puts a short circuit across the
voltage source since current ranges have a low impedance. If
the voltage source is typically 240 V AC or a 3-phase industrial
voltage (415 V), very high fault currents can result. This is why
all current input terminals are fused. If the fuses blow they
must only be replaced by the equivalent ones otherwise the
safety of the instrument may be impaired.
7. Never apply a voltage between the COM terminal and
current terminals.
8. When switching between current ranges to obtain greater
accuracy and better resolution, completely de-energize the
circuit to be measured before changing the range.
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