Ac Current Measurements - Extech Instruments GX900 User Manual

AC CURRENT MEASUREMENTS
CAUTION: Do not make 20A current measurements 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 5000µA AC, set the
function switch to the µA position and insert the red test
lead banana plug into the µA/mA jack. Press the F1 key
(MENU) and select uAAC, Press the OK key.
3. For current measurements up to 500mA AC, set the
function switch to the mA position and insert the red test
lead banana plug into the µA/mA jack. Press the F1 key
(MENU) and select mAAC, Press the OK key.
4. For current measurements up to 10A AC, set the function
switch to the 10A position and insert the red test lead
banana plug into the 10A jack. Press the F1 key (MENU)
and select AAC, Press the OK key.
5. Press the key labeled MENU, move the menu selector to
the item labeled AC, and then press the OK key
6. Remove power from the circuit under test, then open up
the circuit at the point where current is to be measured.
7. 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.
8. Apply power to the circuit.
9. Read the current in the display.
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Extech Instruments
GX900-EU-EN V1.6 4/14