Ac Current Measurements; Resistance Measurements - Extech Instruments EX410A User Manual

AC CURRENT MEASUREMENTS

1. Insert the black test lead banana plug into the negative COM jack.
2. For current measurements up to 200mA AC, set the function switch to the
3. For current measurements up to 10A AC, set the function switch to the
4. Remove power from the circuit under test, then open up the circuit at the
5. Touch the black test probe tip to the neutral side of the circuit.
6. Apply power to the circuit.
7. Read the current in the display.

RESISTANCE MEASUREMENTS

1. Set the function switch to the highest
2. Insert the black test lead banana plug into the negative COM jack.
3. Touch the test probe tips across the circuit or part under test. It is best
4. Read the resistance in the display and then set the function switch to
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CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
highest 200mA AC ( ) position and insert the red test lead banana plug
into the mA jack.
10A AC range and insert the red test lead banana plug into the 10A jack.
point where you wish to measure current.
Touch the red test probe tip to the hot side of the circuit.
WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any resistance measurements. Remove the battery and unplug the line
cords.
Insert the red test lead banana plug into the positive
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
the lowest position that is greater than the actual or any anticipated
resistance.
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