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Hantek HT20COP probe safe to use or not?

Pappy19

I brought the PicoScope 2204a recently that has the +/- 20v max voltage input. The HT20COP secondary ignition coil probe has a 10:1 built in attenuator. 
some direct injection engine secondary coils can output up to 40kV even with a 20:1 attenuator added into the line I can potentially still damage this 20v max scope? 
Voltage max protection spec is 100v but I’d rather not use a cop probe if there’s any risk. I have the hantek HT25 ignition lead clamp pickup also that has its own ground clamp. Maybe that be safer to use. Thanks very much if anyone can point me in the right direction if I wanna use this in an automotive application. Maybe il just stick to 20:1 attenuated primary voltage patterns. I assumed a secondary COP probe touching a coil only picks up a waveform pattern until I found out it’s attenuated. I guess it just comes down to myself not knowing much about scopes in general 

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    Look carefully at the probe datasheet. If its truly an ignition coil probe, it should have more like 1000:1, which still is beyond the 20v rating of your Pico Scope. You can use a 1000:1 probe from Tektronox or LeCroy. If your ambitions and handy, you can even make your own 1000:1 probe using a large res like 100 meg to 1000 meg on the input and perhaps around a 1meg or less on the bottom. Side so your scope zin won't affect the reading too much. You'll need a compensation cap around the large input resistor if you want any accuracy beyond a few kilohertz. You can find documentation on how to compute the exact values if you look for it. And dont forget,  the compensation cap must be a high enough voltage or higher than your input hv signal.

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    Look carefully at the probe datasheet. If its truly an ignition coil probe, it should have more like 1000:1, which still is beyond the 20v rating of your Pico Scope. You can use a 1000:1 probe from Tektronox or LeCroy. If your ambitions and handy, you can even make your own 1000:1 probe using a large res like 100 meg to 1000 meg on the input and perhaps around a 1meg or less on the bottom. Side so your scope zin won't affect the reading too much. You'll need a compensation cap around the large input resistor if you want any accuracy beyond a few kilohertz. You can find documentation on how to compute the exact values if you look for it. And dont forget,  the compensation cap must be a high enough voltage or higher than your input hv signal.

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