PICO Scope 4425A

Mark Instructor Ontario Posted   Latest   Edited  

Does anybody know if the PICO 4425A scope requires an atenuator when hooking up to primary voltage. There is not one provided in the standard or advanced kits.

0
Dmitriy Analyst
Ontario
Dmitriy
 

Hi Mark, yes, there is an attenuation probe in the Standard kit: picoauto​.​com/products/test… If you don’t have any or have only one in your kit, you may need to buy more of those…

+1
Ð Awarded
Agree
Erik Diagnostician
Florida
Erik
 

Agreed. It looks different that past attenuators. You can use older ones but they just look awkward plugged in to BNC+, lol.

+2
Ð Awarded
Agree
Spencer Owner/Technician
Pennsylvania
Spencer
 

The old black ones are 20:1 attenuators and the newer light blue ones are 10:1 attenuators

+1
Ð Awarded
Agree
Erik Diagnostician
Florida
Erik
 

Im aware. The newest attenuator BNC+ is its own lead now also used for Flex Ray as well.

0
Ð Awarded
Mark Instructor
Ontario
Mark
 

Agreed there are attenuaters in the standard with the 4425 scope but not the 4425A which has the new self identifying leads.

0
Ð Awarded
Jay Owner/Technician
Rhode Island
Jay
 

Yes you go, anything over 200v you’ll need it. with voltage spike on primary you could damage your scope. you can use the old attenuators too. 10:1 or 20:1

0
Ð Awarded
Sergio Instructor
Florida
Sergio
 

Any attenuator works fine. Does not need to be specifically a Pico One.

+1
Ð Awarded
Agree
Philip Educator
California
Philip
 

Mark, I'm not suggesting anyone follow my bad example but I went nearly 10 years without reading the warning plainly shown on the front of my Pico about not exceeding 50v input. During that stretch, I'm afraid I routinely checked injectors and coil primary sans attenuator; however, no damage occurred to the scope. I was a bit horrified when I finally read it and began using the 20:1, but…. it…

+4
Ð Awarded
Agree
Helpful
Interesting
Jay Owner/Technician
Rhode Island
Jay
 

You won’t get a correct signal on it, I’ve done it by accident a few times. it had some crazy lines haha

0
Ð Awarded
Olle Instructor
Minnesota
Olle
 

Did the top of the signals get chopped off? It does have a limiter built in that hard limits the input signal.

0
Ð Awarded
Philip Educator
California
Philip
 

Just went off the top of the display, Olle. Since I wasn't usually concerned with peak voltage, especially on injector spikes, I just used it that way….for years! I dropped the scope on its head too many times and messed up channel A BNC some seven years in. Pico fixed it for free and returned it with a rubber protective boot. What a company!

0
Ð Awarded
Michael Mobile Technician
Illinois
Michael
 

I know that my standard kit came with one. It doesn't look anything like the old attenuator, it has is part of the lead.

0
Ð Awarded
Spencer Owner/Technician
Pennsylvania
Spencer
 

If you are going to hook up to anything heading over 200 v you need to have one hooked up This includes components that can spike over 200 v such as but not limited to ignition coils which normally spike to 350 volts and north of that.

+1
Ð Awarded
Agree
Mark Instructor
Ontario
Mark Resolution
 

The answer is yes you need an attenuator for the 4425A. The new standard kit does not include a conventional attenuator but now comes with a test lead with a 10 to 1 attenuator built in.

0
Resolution Ð Awarded
Vicken Diagnostician
California
Vicken
 

It comes with the kit. Only one though. You have to hook it up in series.

0
Ð Awarded