Ac Current Measurements; Resistance Measurements - FLIR Extech Instruments 410 User Manual

AC CURRENT MEASUREMENTS

CAUTION: Do not make current measurements on the 20A scale for longer than 30
seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads.
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 highest 200mA AC (
and insert the red test lead banana plug into the mA
jack.
3. For current measurements up to 20A AC, set the
function switch to the 20A AC range and insert the red
test lead banana plug into the 20A jack.
4. Remove power from the circuit under test, then open up
the circuit at the point where you wish to measure
current.
5. Touch the black test probe tip to the neutral side of the
circuit.
Touch the red test probe tip to the "hot" side of the
circuit.
6. Apply power to the circuit.
7. Read the current in the display.

RESISTANCE MEASUREMENTS

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.
1. Set the function switch to the highest Ω position.
2. Insert the black test lead banana plug into the negative
COM jack.
Insert the red test lead banana plug into the positive Ω jack.
3. Touch the test probe tips across the circuit or part under test.
It is best to disconnect one side of the part under test so the
rest of the circuit will not interfere with the resistance
reading.
4. Read the resistance in the display and then set the function
switch to the lowest Ω position that is greater than the actual
or any anticipated resistance.
) position
8 EX410-EU_ENG V5.1 10/07