Ac / Dc Current Measurements - Extech Instruments MN47 User Manual

AC / DC CURRENT MEASUREMENTS

CAUTION: Do not make current measurements at 10 Amps for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
WARNING: To avoid electric shock, do not measure AC current on any circuit whose voltage
exceeds 250VAC.
1. Insert the black test lead banana plug into the negative COM jack.
2. For current measurements up to 4000µA, set the function switch to the µA position and insert
the red test lead banana plug into the mA/µA jack
3. For current measurements up to 400mA, set the function switch to the mA position and insert
the red test lead banana plug into the mA/µA jack.
4. For current measurements up to 10A, set the function switch to the 10A range and insert the
red test lead banana plug into the 10A jack.
5. Use the MODE button to select AC or DC current.
6. Remove power from the circuit under test, then open up the circuit at the point where you wish
to measure current.
7. 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.
8. Apply power to the circuit.
9. Read the current in the display.
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7 MN47-EU-EN-V3.0–12/11