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PMK German Probes X1000 strange defect

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jonpaul:
Bonjour, HighVoltage:

Many thanks for this note: "I had very bad experience with PMK 1000x Probes and killed a few of them without obvious reasons."

Can you detail your "very bad experience" that killed them?


As  designer, and manufacturer of SMPS, HVPS, since 1970s,  we   used the classic Tektronix P6015, P6015A for decades, never any issues.
 
We   discovered the   PMK X1000 probes recently thought to try a pair, as the PMK probe  bodies and comp boxes are much smaller  than the TEK.

We find that the PMK X1000  probe tips, bodies and comp box trimmers are much  more delicate  than the TEK.

We hope that PMK Germany service can support the bad probe and fix it.


Amicalment,


Jon

HighVoltage:
Hello Jon

For high voltage measurements of up to 40kV I also use the Tektronix P6015A and never had any problems with any of them.

For anything above 40 kV and up to 80kV I use DIY capacitive dividers.

For coil measurements of up to 2kV the P6015A probe was too bulky and I got the PMK Probes X1000 and one failed right away. I got a new one under warranty and that one failed after a short time. I tried a 3rd one and that one also failed and got returned for a refund. Since they all had warranty, I never attempted to open them for analysis.

I switched to the TESTEC many years ago and and although they are only good for 2.5 kV, I never had a failure.   

jonpaul:
UPDATE 23 Oct 2023:

Problem is definitely in the probe compensation box, most likely the scale/gain trimmer.

I have received an RMA from PMK service, I shall return the defective probe to Germany soon.

I have  changed the post  title as PMK support is fine!

Shall update further after probe is returned to me.

Jon

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