Test Products International 133 - Manual (Page 18)

19 18
g. Continuity Buzzer
WARNING!
Do not attempt to make continuity measurements with
circuit energized.
Instrument set-up:
FUNCTION BLACK RED
TEST LEAD TEST LEAD
OHM( ) COM V
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 input jack.
4. Set the rotary switch on the 133 to the position.
5. Connect the test leads to the circuit to be measured.
6. Listen for the buzzer to confirm continuity.
h. Data Hold
Press the DATA-H button at any time on any function or
range to freeze the reading on the LCD display. This func-
tion is very useful when measuring in locations where the
display is difficult to read.
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
OHM( ) COM V 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
input jack.
4. Set the rotary switch on the 133 to the position.
5. Connect the 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 0.3
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.
!