Resistance Measurements; Continuity Check - Extech Instruments EX310 User Manual

RESISTANCE MEASUREMENTS

WARNING: To avoid electric shock, disconnect power to the unit under test
and discharge all capacitors before taking any resistance measurements.
Set the function switch to the highest Ω position.
1.
2. Insert the black test lead banana plug into the negative COM jack.
3. Insert the red test lead banana plug into the
positive Ω jack.
4. Touch the test probe tips across the circuit or
part under test. It is best to disconnect one side
of the part under test so the rest of the circuit
will not interfere with the resistance reading.
5. Read the resistance in the display. Move the
function switch to successively lower Ω
positions to obtain a higher resolution reading.

CONTINUITY CHECK

WARNING: To avoid electric shock, never measure continuity on circuits
that have a voltage potential.
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 Ω jack.
4. Touch the test probe tips to the circuit or
wire you wish to check.
5. If the resistance is less than
approximately 100Ω, the audible signal
will sound. If the circuit is open, the
display will indicate "1___".
9 Model EX310-EU-ENG – V7.2– 05/2008