Products > Test Equipment
Broken probe, how do I argue this with warranty.
nsled:
I made a video of the problem here
And this was the response:
"I have sent your video & questions to the engineer.
Below the answer
HVP series is not able to test the switching power. It’s the passive probe, only can measure power that is insulated/grounded. (your transformer is not grounded) You need a Differential Probe for your application. You can buy our DP-50K
https://www.pintek.com.tw/productDetail/land-ctop-2/index/pscsn/17072/psn/241470
Thank you.".
Am I being gaslighted here? why would this 1000x passive probe read any different from the 10x passive probe. I don't know how to argue and demonstrate the point.
jonpaul:
Response seems correct.
See 1980s Tektronix Circuit Concepts books,
"Oscilloscope Probe Circuits"
https://w140.com/tekwiki/images/6/62/062-1146-00.pdf
"probe Measurements"
https://w140.com/tekwiki/images/1/19/062-1120-00.pdf
j
PS: poor test setup, hazardous HV at high freq.
check HV forums for precautions
nsled:
I kind of get where the argument is coming from, however I still believe its faulty. Why would 2 passive probes give completely different results? Show me a good test setup. As shown its a battery -> buck converter -> 240v inverter -> 6kV transformer.
Narrowing it down to just the 240Vrms (338Vpeak) since it's a known voltage, the 10x passive probe on the scope measures it perfectly fine with the exact same connection whereas the 1000x probe does not.
tautech:
Swap probe to another channel, reassign 1000x attenuation.
Set channel to 1V/div.
Sanity check with probe compensation output. 3V p-p 1kHz ?
nsled:
--- Quote from: tautech on July 05, 2024, 11:05:40 am ---Swap probe to another channel, reassign 1000x attenuation.
Set channel to 1V/div.
Sanity check with probe compensation output. 3V p-p 1kHz ?
--- End quote ---
The other channels are the same. The 1000x probe does not register anything at the 3V output, the 10x checks fine.
I just remembered that I put it on a plasma globe when I first got it (and took a photo), which measured 5kV. Now its measuring 10kV so it's definitely developed a fault somehow.
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