Test Products International 126 User Manual
Page 21
21
g.
CONTINUITY BUZZER
WARNING!
Do not attempt to make continuity measurements
with circuit energized.
Instrument set-up:
FUNCTION
BLACK RED
TEST LEAD
TEST LEAD
COM
V
Ω
Measurement Procedure:
1.
Disconnect power to the circuit to be measured.
2.
Plug the black test lead into the COM input jack.
3.
Plug the red test lead into the V
Ω
input jack.
4.
Set the rotary switch to the
function.
5.
Press yellow push button to activate continuity buzzer.
6.
Connect the test leads to the circuit to be measured.
7.
Listen for the buzzer to confirm continuity.
h. DATA HOLD
Press the Data Hold button at any time on any function or
range to freeze the reading on the LDC display. This func-
tion is very useful when measuring in locations where the
display is difficult to read.
20
f.
MEASURING DIODES
CAUTION!
Do not attempt to make diode measurements with
circuit energized. The only way to accurately test
a diode is to remove it completely from the circuit
before attempting to measure it.
Instrument set-up:
FUNCTION
BLACK RED
MINIMUM
MAXIMUM
TEST LEAD
TEST LEAD
READING
READING
COM
V
Ω
0.001V
2.000V
Measurement Procedure:
1.
Disconnect power to the circuit to be measured.
2.
Plug the black test lead into the COM input jack.
3.
Plug the red test lead into the V
Ω
input jack.
4.
Set the rotary switch to the
function.
5.
Connect black test lead to the banded end of the diode
and the red test lead to the non-banded end of the
diode.
6.
Reading on the display should be between
0.5 and 0.8 volts.
7.
Reverse test lead connections in 5 above.
8.
Reading on the display should be OFL (Overload).
NOTE: If diode reads 0 in both directions, diode is short-
ed. If diode reads OFL in both directions, diode is open.