Question on current ramp testing a cop.
5 months 1 week ago #65504
by Ora1996
Question on current ramp testing a cop. was created by Ora1996
Hi I was wondering if anyone could tell me is this a good wave form? it’s from a good running car that I unplugged a coil to see what a difference it made. I’m using a fuse that the cops and injectors use. And use a low amp clamp with a fuse current loop. Just asking for future tests. And yes I know the wave form is upside down. Thanks
Please Log in or Create an account to join the conversation.
- juergen.scholl
- Offline
- Platinum Member
- Active partschanger
Less
More
- Posts: 1213
- Thank you received: 453
5 months 1 week ago #65506
by juergen.scholl
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
Replied by juergen.scholl on topic Question on current ramp testing a cop.
The way you set the time base and current range will allow you to do some comparison between multiple coils. Obviously in your capture 1 of the coils is missing. You can see the amperage draw of each coil and see the consistency of the coil activations or their absence.
You would need to change at least time base and with this sampling rate to analize details of single coil's performance like saturation time, CEMF, overshoot.
Also you may consider to use peak detect on longer time bases like the one you show here.with the SO scope
You would need to change at least time base and with this sampling rate to analize details of single coil's performance like saturation time, CEMF, overshoot.
Also you may consider to use peak detect on longer time bases like the one you show here.with the SO scope
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
Please Log in or Create an account to join the conversation.
5 months 1 week ago #65507
by Ora1996
Replied by Ora1996 on topic Question on current ramp testing a cop.
Ok thanks I appreciate the reply. I’m just starting out using a scope what does peak detect do differently? Also with the one coil i unplugged is that what you would see with a coil that doesn’t put out any spark or would it just show a lower current ramp? Thanks
Please Log in or Create an account to join the conversation.
- juergen.scholl
- Offline
- Platinum Member
- Active partschanger
Less
More
- Posts: 1213
- Thank you received: 453
5 months 1 week ago #65510
by juergen.scholl
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
Replied by juergen.scholl on topic Question on current ramp testing a cop.
Peak detect puts the scope in a mode where it applies the highest available sample rate. Especially when scoping ignition events (and other fast signals)this high sample rate is necessary for true and detailed graphic representation'
A failed coil with no current flow will show up just like in your previous capture. A coil with high primary resitance and hence low current flow also will stand out, as well as a shorted secondary may be seen.
But: the coil's current draw may be perfectly fine amd yet an ignition problem can be present. You would need further testing like primary and/or secondary voltage tests to find these kinds of problems.
A failed coil with no current flow will show up just like in your previous capture. A coil with high primary resitance and hence low current flow also will stand out, as well as a shorted secondary may be seen.
But: the coil's current draw may be perfectly fine amd yet an ignition problem can be present. You would need further testing like primary and/or secondary voltage tests to find these kinds of problems.
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
The following user(s) said Thank You: Noah
Please Log in or Create an account to join the conversation.
5 months 1 week ago #65511
by Ora1996
Replied by Ora1996 on topic Question on current ramp testing a cop.
Thanks
Please Log in or Create an account to join the conversation.
Time to create page: 0.233 seconds