About this item

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Descriptions:

- Connect the RED clip to the + connector and the BLACK clip to the connection of the power source of the circuit under testing. The supply voltage should not exceed 18V DC.
- For TTL and DTL, set the top selector switch to the side marked "TTL". For COMS, set the top selector switch to the side marked "CMOS". Contact the probe pin to the point to be tested. The LEDs indicate their logical states:
A: All LEDs are off – high impedance.
B: RED LED ON ------ HIGH CONDITION [1]
C: GREEN LED ON --- LOW CONDITION [0]
D: ORANGE LED ON - PULS.
- To detect and store pulses or level transitions, place the lower selector button on the page marked "PULSE" first. Contact the probe pin to the point to be tested. The LEDs indicate their basic state. If you place the lower selector switch on the side marked "MEM", the orange LED will light up when a pulse or level change is detected. The pulse direction can be determined compared to the original ground state. After use, reset the logic probe by resetting the lower selection switch to the side marked "PULSE".