Ma/Μa Ac/Dc Current Measurements - Extech Instruments EX350 User Manual

mA/µA AC/DC Current Measurements
WARNING: Do not handle the test leads above the finger/hand guard barrier.
CAUTION: Observe CAT III 600V and with respect to Earth Ground.
1. Insert the black test lead into the COM terminal and the red test lead into the mA/µA
terminal.
2. Turn the meter's function switch to the
symbol will appear on the display.
3. The meter defaults to the Auto Range mode. When in Auto mode, the display shows the
Auto icon. Press the R button to manually range the meter. Press the R button to step
through the ranges. Press and Hold the R button to return to the Auto Range mode.
4. Press the M button to select AC or DC.
5. Current measurements must be taken in series with the circuit under test. See
accompanying diagram.
6. Touch the black test lead to the negative side of the circuit and the red test lead to the
positive side of the circuit.
7. Read the current measurement in the display represented by the numerical digits and
the bar graph. The display will indicate the proper decimal point and value. In DC, If the
polarity is reversed, the display will show (‐) minus before the value.
Fig 4‐4 mA/µA AC/DC CURRENT MEASUREMENTS
or position. The mA or µA units
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