PICO Scope 4425A
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.
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…
Agreed. It looks different that past attenuators. You can use older ones but they just look awkward plugged in to BNC+, lol.
The old black ones are 20:1 attenuators and the newer light blue ones are 10:1 attenuators
Im aware. The newest attenuator BNC+ is its own lead now also used for Flex Ray as well.
Agreed there are attenuaters in the standard with the 4425 scope but not the 4425A which has the new self identifying leads.
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
Any attenuator works fine. Does not need to be specifically a Pico One.
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…
You won’t get a correct signal on it, I’ve done it by accident a few times. it had some crazy lines haha
Did the top of the signals get chopped off? It does have a limiter built in that hard limits the input signal.
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!
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.
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.
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.