Connect with us

Power Trip when probing Oscilloscope..

Discussion in 'General Electronics Discussion' started by jrd78ep, Mar 27, 2013.

Scroll to continue with content
  1. jrd78ep

    jrd78ep

    13
    0
    Mar 21, 2013
    Hello Guys....just wondering why the power is tripping when i probe osciloscope to measure clock signal output from PWM IC (uc3525)...Thanks in advance.
     
  2. Rleo6965

    Rleo6965

    585
    9
    Jan 22, 2012
    Oscilloscope test probe were high impedance and should not affect or loading the output of uc3525. What kind of oscilloscope your using?
    I use old model oscilloscope and I removed the Ground pin of AC plug so Oscilloscope Gnd connection will be floating. This to avoid loading or disturb the sensitive PWM circuits.
     
  3. jrd78ep

    jrd78ep

    13
    0
    Mar 21, 2013
    Tektronix tds2012...let say i don't want to remove the ground..and as per my friend advise use the 1:1 transformer between measurement....do you think it'll work? tHanks a lot.
     
  4. Rleo6965

    Rleo6965

    585
    9
    Jan 22, 2012
    Isolation transformer? That's very good advice. Buy one for your safe trouble shooting AC source devices or pwm device and your test equipment.

    Wish I can replace my 15 year old Leader 1021 Oscilloscope with Tektronix TDS2012.:D
     
    Last edited: Mar 27, 2013
  5. sheldonstv

    sheldonstv

    68
    0
    Jul 17, 2007
    ok you obviously want to release the magic smoke and loud bangs-what is the item you are trying to repair.....if it is a smps related item you must use an isolation transformer
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-