Found cheap auto ignition probe anyone else used one before ? Hantek ht25
- Thread starter GophersGarage
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GophersGarage
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Thank you I will look for them
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2ndGearRubber
Well-known member
If your goal is only to see secondary patterns on a plug-wire equipped vehicle, life is pretty easy.
Yes, your pickup will work fine. However, looking at the details on the hantek page, we can glean how the pickup actually works. The pickup is attenuated 1000/1, so 1volt on your screen, is 1000v in the secondary pattern. An alligator clip on a standard lead, will measure a secondary pattern, assuming you can drop your scales or zoom in enough to see.
When running multiple channels, you can grab an ignition strike as a sync very easily with an alligator.
Those clips are worthwhile on most scopes, as zooming or setting the scales super tiny can be very difficult.
Yes, your pickup will work fine. However, looking at the details on the hantek page, we can glean how the pickup actually works. The pickup is attenuated 1000/1, so 1volt on your screen, is 1000v in the secondary pattern. An alligator clip on a standard lead, will measure a secondary pattern, assuming you can drop your scales or zoom in enough to see.
When running multiple channels, you can grab an ignition strike as a sync very easily with an alligator.
Those clips are worthwhile on most scopes, as zooming or setting the scales super tiny can be very difficult.
Bobioz1
Well-known member
An alligator clip on a plug wire is a really bad idea. Secondary voltage reaching a DSO will kill it in a heartbeat.
2ndGearRubber
Well-known member
Don't pierce the insulation obviously. You could even just wrap the test lead around the plug wire for a similar effect.
The purpose of the second clamp on a secondary lead, is to offer a ground path if the secondary voltage exits the plug wire and enters the lead. Obviously don't use such a method on questionable/old/crusty wires, if you're using a standard test lead without a safety clip.
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GophersGarage
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Interesting video
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GophersGarage
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But I thought that’s the point of having a Attenuators to bring things down
Ps I also bought the primary adapter
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Bobioz1
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If you want to learn something about scoping a car, google Mac Vandenbrink. Still a lot of his stuff out there.
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GophersGarage
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That was my understanding too the ground clamp is your safety net
Just to clarify so I understand things better . A secondary cable will be
Eg hantek
Scope > Ignition clamp > ground on same wire
Idea is scope picks up signal because it is before the ground clamp .
Vs let’s say you used the standard cable that comes with uscope basic (green)
The green could be used to pick up signal but you have no ground in line like a secondary cable (hantek)
Am I looking at this correctly ?
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GophersGarage
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Thanks lately been watchingDiagnose Dan also Scanner Danner since he has videos on uscope training
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Bobioz1
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Your secondary probe (hantek) is fine. A standard scope lead (green) is not fine. The uscope has a max voltage input of 80 volts. Some secondary ignition systems reach 50,000 volts (“the spark”) output. If the secondary voltage arcs to the probe the hantek probe will save the scope. The green lead will pass the voltage to the scope and let the magic smoke out of it.
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GophersGarage
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Perfect we are on the same page thank you
I think uscope max voltage with no attenuator is 40v
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2ndGearRubber
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The green lead held next to a spark plug wire will pick up a secondary pattern just fine. It just doesn't have the safety clip. Hold a lead near a plug wire, lay it on, gators, etc Set the scales with 1 volt vertical height top to bottom, so on a uscope 0.1v/division. You'll see a tiny little secondary pattern.
Yes, if ignition coil secondary output gets fired into the scope, it's over for that channel at a minimum. The smart move is using leads with the clips on them for secondary, offering an alternate path to ground. I have more secondary leads than inputs on my scope. But, yeah, in a pinch you can just toss a gator on there lightly for a sync, or even diagnostic with a scope with a big zoom or tight scales. If you need to invert, just swap the banana jacks around.
Yes, if ignition coil secondary output gets fired into the scope, it's over for that channel at a minimum. The smart move is using leads with the clips on them for secondary, offering an alternate path to ground. I have more secondary leads than inputs on my scope. But, yeah, in a pinch you can just toss a gator on there lightly for a sync, or even diagnostic with a scope with a big zoom or tight scales. If you need to invert, just swap the banana jacks around.
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GophersGarage
Well-known member
Thank you guys for confirming big help
Trying to built my uscope with accessory to make it more useful
I just ordered the AES utest kit
I already have a bunch of test leads from power probe etc but that utest kit is pretty complete set .
I am seeing some videos now on paddle probes home made pretty cool
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Trying to built my uscope with accessory to make it more useful
I just ordered the AES utest kit
I already have a bunch of test leads from power probe etc but that utest kit is pretty complete set .
I am seeing some videos now on paddle probes home made pretty cool
Sent from my iPhone using Tapatalk