Model EX330 - Version 4.0 – 05/06
7
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
Ω
position.
2.
Insert the black test lead banana plug into the
negative
COM
jack.
Insert the red test lead banana plug into the
positive
Ω
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
Ω
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
Ω
, the audible signal will sound. If the
circuit is ‘open’ (bad), the display will
indicate “OL”.
