Hantek HT25COP Coil-on-Plug und Signalsonde

How does this compare to more expensive diagnostic probes?

The HT25COP offers excellent value whilst providing core functionality of premium probes. Differences mainly involve build quality, sensitivity range, and included accessories. For professional automotive diagnostics, performance is comparable to probes costing significantly more.

What safety precautions are necessary during testing?

Ensure probe insulation integrity before use. Keep away from moving belts, fans, and hot surfaces. Never touch coil terminals during operation. The probe provides electrical isolation but standard automotive electrical safety practices apply.

Can the probe be used for injector testing?

Yes, the HT25COP can detect electromagnetic pulses from fuel injectors and other inductive actuators. Position the probe near the injector solenoid to capture switching waveforms for diagnostic analysis.

How do I interpret abnormal waveform patterns?

Normal waveforms show clean firing lines (5-15kV) followed by 1.5-2ms burn time. High firing voltage indicates worn plugs or lean mixture; extended burn time suggests rich mixture; multiple firing events indicate carbon tracking or insulation breakdown.

Is the probe suitable for hybrid and electric vehicles?

The HT25COP works on any petrol engine regardless of vehicle electrification level. However, ensure proper earthing and follow manufacturer safety protocols when working on hybrid systems.

What's the difference between this and primary ignition testing?

Secondary testing shows actual spark formation and combustion chamber conditions, whilst primary testing only shows coil switching. Secondary waveforms reveal spark plug condition, mixture strength, and combustion quality that primary testing cannot detect.

Can this probe detect misfires and timing issues?

Yes, the HT25COP captures complete secondary waveforms showing firing voltage, burn time, and decay oscillations. Misfires appear as reduced or absent firing lines, whilst timing issues show irregular patterns across cylinders.

How does the probe attach to the ignition coil?

Simply position the sensor paddle against the coil housing - no physical connection required. The flexible arm allows positioning at various angles. Magnetic coupling occurs through the coil's electromagnetic field during firing.

Does the HT25COP require specific oscilloscope settings?

Recommended settings: voltage range 5-15kV, timebase 10-20ms, trigger on rising edge at 2-4kV threshold. Most automotive oscilloscopes include preset ignition modes that work effectively with this probe.

What ignition systems is the HT25COP compatible with?

The probe works with all coil-on-plug (COP) ignition systems where individual coils mount directly on spark plugs. It's also effective on conventional ignition systems with accessible high-voltage leads. Compatible with petrol engines from motorcycles to commercial vehicles.