Dc Current Measurements - Extech Instruments 411 User Manual

DC 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 200µA DC, set the function
switch to the 200µA DC (
lead banana plug into the uA/mA jack.
3. For current measurements up to 200mA DC, set the function
switch to the 200mA DC position and insert the red test lead
banana plug into the uA/(mA jack.
4. For current measurements up
to 20A DC, set the function
switch to the 20A DC range
and insert the red test lead
banana plug into the 20A jack.
5. Remove power from the
circuit under test, then open
up the circuit at the point
where you wish to measure
current.
6. Touch the black test probe tip
to the negative side of the
circuit.
Touch the red test probe tip to
the positive side of the circuit.
7. Apply power to the circuit.
8. Read the current in the
display.
)position and insert the red test
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