Extech Instruments EX570 Guía de usuario descargar pdf (Pagina 8)

EX570-EU-EN V2.6 1/13

CONTINUITY CHECK

WARNING: To avoid electric shock, never measure continuity on circuits or wires that have

voltage on them.

1. Rotate the function switch to the Ω position.

2. Insert the black lead banana plug into the negative COM jack.

Insert the red test lead banana plug into the positive  jack.

3. Press the SELECT button to indicate“ " on the display

4. Touch the test probe tips to the circuit or wire you wish to check.

5. If the resistance is less than approximately 35, the audible signal will sound. If

the circuit is open, the display will indicate “OL”.

DIODE TEST

1. Rotate the function switch to the green Ω position.

2. Insert the black test lead banana plug into the negative COM jack and the red

test lead banana plug into the positive V jack.

3. Press the SELECT button to indicate “ “ and “V” on the display.

4. Touch the test probes to the diode under test. Forward voltage will typically

indicate 0.400 to 0.700V. Reverse voltage will indicate “OL”. Shorted devices

will indicate near 0V and an open device will indicate “OL” in both polarities.

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Extech Instruments EX570 Guía de usuario Pagina 8