Ac And Dc Current; Capacitance - Extech Instruments 381285 User Manual

AC and DC CURRENT (mA, 20A)
WARNING: To avoid electric shock do not measure AC current on any circuit whose
voltage exceeds 250V AC.
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CAUTION: Do not make current measurements on the 20A scale for longer than 30
seconds once every 15 minutes, Exceeding 30 seconds may cause damage to the meter
and/or the test leads.
1. Insert the black lead into the negative COM jack and the red test lead into the
positive mA or 20A jack.
2. Turn the rotary switch to the A position.
3. Press the AC/DC key to toggle between AC and DC measurements.
4. Press the F3 key to select the
5. Connect the test probe tips in series with the circuit under test. The display will
indicate the proper decimal point, value and symbol.

CAPACITANCE

WARNING: To avoid electric shock, disconnect power to the unit under test and
discharge all capacitors before taking any capacitance measurements. Remove the
batteries and unplug the line cords.
1. Insert the black test lead into the negative COM jack and the red test lead into the
positive CAP jack.
2. Turn the rotary switch to the CAP position.
3. The meter will turn on in the capacitance autoranging mode.
4. Touch the test lead to the capacitor to be tested. The display will indicate proper
decimal point, value and symbol.
Note: Manual ranging is not available in the Capacitance function.
mA or 20A function.
16 V2.1 03/06