INPUT
LED STATES
SOUND
SIGNAL
LO
HIGH
PULSE
Probe not connected to power.
*
Interpreting
the LEDs
LED On
LED Off
LED Blinking
No Sound
Sound
*
OPERATING INSTRUCTIONS
*
Logic tip is not connected or Logic “0” no
pulse activity.
Logic “1” no pulse activity.
Logic “0” with positive single pulses.
Logic “1” with negative single pulses.
Logic “0” with positive continuous pulses.
Logic “1” with negative continuous pulses.
This information for switch to the sound position.
-8-
Figure J
Peel the backing off of the label and stick the label onto the
top case as shown in Figure J. Then, slide on the red
tubing onto the tip as shown. Shrink the tubing by heating
it with your soldering iron. Be sure that the soldering iron
does not contact the tubing or plastic case.
Label
Red Tubing
Tip
To operate the logic probe, connect the two alligator
clips to the circuit DC power supply (the red clip to
the positive voltage and the black clip to ground). BE
SURE THE POWER SUPPLY IS UNDER 35V OR
DAMAGE MAY OCCUR TO THE PROBE. The green
LED will light. Touch the probe tip to the circuit node
to be analyzed. If the voltage of this point is > 50%
of the voltage power supply, the red LED will light to
indicate the HI level voltage. If the sound switch is in
the SOUND position, you will hear the beeper tone
for the HI level voltage. If the sound switch is OFF,
the same results occur with the LEDs but without
sound.
When there are single pulses on the probe tip, the
yellow LED will flicker with the frequency of input
pulses. For continuous pulses, the yellow LED will
stay lit.
