Search found 12 matches

by Tomblueprintauto
Wed Apr 10, 2024 10:49 pm
Forum: PicoScope 7 Automotive software
Topic: Need to know how much capture time will be saved
Replies: 1
Views: 863

Need to know how much capture time will be saved

I'm really struggling here with not being able to see how much capture time will be saved on a given setting. I've been working on a machine with a VERY intermittent fault that only occurs once per day. I had my scope all setup running on 83.3 MS (the default) and a 5 s/div. I jumped in the machine ...
by Tomblueprintauto
Mon Jul 17, 2023 9:00 am
Forum: Automotive kit hardware
Topic: Connecting to a high voltage AC supply
Replies: 2
Views: 18738

Connecting to a high voltage AC supply

Hello everyone. I want to look at the voltage and current through motor connected to mains supply. I'll have my "negative" lead connected to earth and and "positive" connected to Line (or Phase for some other countries). Supply voltage is 230V. Now, because my negative lead will actually be positive ...
by Tomblueprintauto
Thu Jul 06, 2023 8:28 pm
Forum: PicoScope 7 Automotive software
Topic: How do I know when the first frame will be overwritten?
Replies: 2
Views: 2188

Re: How do I know when the first frame will be overwritten?

Thank you for the info. That is going to be very helpful
by Tomblueprintauto
Thu Jul 06, 2023 7:28 am
Forum: PicoScope 7 Automotive software
Topic: How do I know when the first frame will be overwritten?
Replies: 2
Views: 2188

How do I know when the first frame will be overwritten?

I want to perform a parasitic drain test on a car overnight. I'll set everything up and come back 16 hours later to look at the data. The problem is that Pico7 starts to overwrite the frames when it gets full. Usually I get 64 frames but if I up the sample rate sometimes it starts to overwrite after ...
by Tomblueprintauto
Thu Sep 15, 2022 8:47 pm
Forum: Help me fix my car
Topic: Vauxhall Opel Astra 2.0 Diesel 2012
Replies: 4
Views: 4051

Re: Vauxhall Opel Astra 2.0 Diesel 2012

Are you thinking 1800 bar is too low? I'd have thought that was enough to run.
That drop in fuel pressure, is that after it dies or before?

Can you get waveform with cam or crank, injector pulses and fuel pressure?
by Tomblueprintauto
Mon Sep 12, 2022 10:41 am
Forum: PicoScope 7 Automotive software
Topic: Deep cycle battery health check
Replies: 1
Views: 2289

Deep cycle battery health check

I've been wondering if there is an accurate way of checking the RC of a deep cycle battery using a scope? Some way of avoiding the 20A discharge tests the take hours. Perhaps if we hook up a load to the battery and monitor current and voltage over time we could come up with a math channel that will ...
by Tomblueprintauto
Mon Sep 12, 2022 10:35 am
Forum: Help me fix my car
Topic: 2005 honda hrv misfire problem
Replies: 2
Views: 2943

Re: 2005 honda hrv misfire problem

Please add more channel labels and notes about what we are actually looking at. Makes it more likely that you will get good help I notice that in your secondary ignition waveform that the energy at the end of the burn time is quite high when compared with the firing voltage. The height first ...
by Tomblueprintauto
Tue Aug 16, 2022 11:47 pm
Forum: Forum feedback
Topic: How to add psdata files
Replies: 1
Views: 2690

How to add psdata files

I tried to upload a capture just before but it keeps telling me that the file is too big?

Its only a single page that had been saved so pretty hard to make the file any smaller. Is there a way to save a capture in a slightly lower quality or something?
by Tomblueprintauto
Tue Aug 16, 2022 11:45 pm
Forum: Diagnostic discussion
Topic: 1995 Toyota 4runner hard starting when cold
Replies: 3
Views: 4326

1995 Toyota 4runner hard starting when cold

Could I please get an opinion on this cranking relative compression test? It's an old diesel so injection trigger available to isolate specific cylinders This vehicle takes a long time to fire up when cold. The glow plugs have been replaced and are drawing 60A You can see that the current from the ...
by Tomblueprintauto
Wed Jun 08, 2022 9:36 pm
Forum: Automotive kit hardware
Topic: Putting a negative bias on the scope probes
Replies: 2
Views: 3446

Putting a negative bias on the scope probes

I was watching some video's of Bernie Thompsons and he's using an Escope from Automotive Test Solutions that puts a negative 2V bias on his probes somehow. This means that when you back probe a connector the voltage is lifted to 0V (or higher) and you can be confident that you have a good connection ...