EX570-ENG V2.3 3/09
8
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
Ω
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
Ω
, 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.
Byram
Labs