Extech Instruments EX320 Guia do Utilizador descarregar pdf (Página 8)

EX320-en-GB_V5.4 12/14

RESISTANCE MEASUREMENTS

WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all

capacitors before taking any resistance measurements. Remove the batteries and unplug the line

cords.

1. Set the function switch to the  position.

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

jack.

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

3. Touch the test probe tips across the circuit or component

under test. It is best to disconnect one side of the circuit under

test so the rest of the circuit will not interfere with the

resistance reading.

4. Read the resistance in the display.

CONTINUITY CHECK

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

voltage on them.

1. Set the function switch to the position.

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

jack.

3. Insert the red test lead banana plug into the positive 

jack.

4. Use the MODE button to view the icon on the display.

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

to check.

6. If the resistance is less than approximately 100, the

audible signal will sound. If the circuit is ‘open’ (bad), the

display will indicate “OL”.

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Sem comentários

Extech Instruments EX320 Guia do Utilizador Página 8