FLUKE 393FC User Manual for the Fluke 393FC True-rms Clamp Meter with iFlex, CAT III 1500 V, 1500 V DC/1000 V AC/ 999.9 A DC or AC

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393/393 FC

Users Manual

Resistance/Continuity

To measure resistance or continuity:

1. Turn the control knob to D.

2. Remove power from the circuit to test.

3. Connect the black test lead to the COM terminal and the red test lead to the VX terminal.

4. Touch the probes to the test points of the circuit.

The display shows the value.

If the resistance is <30 X, the beeper sounds continuously to indicate continuity and the green

LEDs blink. If the display shows OL, the circuit is open.

Capacitance

The Clamp determines capacitance by charging a capacitor with a known current, measuring the

resulting voltage, then calculating the capacitance.

Note

A good capacitor stores an electrical charge and may remain energized after power is

removed. Before you touch the capacitor or make a measurement, turn all power OFF,

use the Clamp to confirm that power is OFF, and carefully discharge the capacitor by

connecting a resistor across the leads. Be sure to wear appropriate personal protective

equipment.

To measure capacitance:

1. Turn the control knob to

2. Push to shift to the t function.

3. Remove the capacitor from the circuit and discharge the capacitor.

4. Connect the black test lead to the COM terminal and the red test lead to the VX terminal.

5. Touch the probes to the capacitor leads.

The display shows the measurement.

OL indicates the capacitor is faulty or the capacitance value is higher then the measurement

range. diSc indicates the capacitor does not properly discharge.

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FLUKE 393FC True-rms Clamp Meter with iFlex, CAT III 1500 V, 1500 V DC/1000 V AC999.9 A DC or AC