Electronics > Projects, Designs, and Technical Stuff

hv probe

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m3vuv:
I dont see the problem all the punctuation is there ,If the website fails to display it correctly,then i dont see what i can do about it!!.

TimNJ:
I am really not trying to be an ass, but I agree that is is difficult to read your writing. This is meant to be constructive, so I hope I don't come off the wrong way. Periods and capital letters would help a lot!

i assume then by the time i measure 1ky the error will be 10%?any idea what value resistors i need for 1v reading for 10v in,im struggling with the maths!,cheers,btw the pcb i made is fitted into the nose of the fluke probe and is sprung loaded to stop any arcs,im sure if the original body and leads were good for measuring 20 kv then 2 kv should be well in limits...

---

I assume, then, by the time I measure 1K the error will be 10%? Any idea what value resistors I need for 1V reading for 10V in? I'm struggling with the maths! Cheers. BTW, the PCB I made is fitted into the nose of the Fluke probe and is spring loaded to stop any arcs. I'm sure that if the original body and leads were good for measuring 20KV, then 2KV should be well in limits....

Ysjoelfir:
One thing you could do is... well.. maybe stick to the standards used everywhere? like, writing the space AFTER the comma, ending your sentences with a fullstop, ending your sentences at all in a somehow understandable manner?
I mean, I can't be the only one who wants to rip out his eyes while trying to read what you tried to express?
Please note also that it is not really appealing to help someone who calls you a smartass and tells you you're waffling without being helpfull...

Your attitude seems to be like "Hey, you, yes you! Help me, I can't get this solved by myself. I mean, I actually can, since I am one of the smartest of all, but you know, you dumb uncle bumblefuck could do this work for me, for free, in your spare time, when I ask you to do so and the way I want you to do it. What, you're thinking this topic is over my capabilities? How dare you! I know exactly how this works!!!1", at least that is the impression I get from reading this topic and your older posts.

Please consider if this is the impression you want other people to have from you. It could be that this isn't the way you are in person, but maybe it's the way people see you because of the way you express yourself.

tggzzz:

--- Quote from: m3vuv on October 30, 2019, 10:39:07 pm ---I dont see the problem all the punctuation is there ,If the website fails to display it correctly,then i dont see what i can do about it!!.

--- End quote ---

Ah. You are channelling Eric Morecambe's famous joke, still remembered after 48 years: ā€œI’m playing all the right notes, just not necessarily in the right order.ā€

sourcecharge:

--- Quote from: m3vuv on October 30, 2019, 10:27:44 am ---Hi,ive a fluke 85v and want to build a high voltage probe for it,the input inpeadance is 10Mohm on the 1000v dc scale,i want to measure the grid bias on a scope,ie circa -1900v,whats the best way of doing it,looking at building a 100:1 divider anyone know what value resistors to use,also would a 10:1 divider be better,or would that load the dut to much,cheers Paul m3vuv.

--- End quote ---

Why would you want to build a probe for that low of voltage?

They readily make probes for about 100 bucks that go up to 2000v at a 100:1 ratio for oscopes and you can use an adaptor for the banana plug to CNC connection.

That way, you can use it for both an oscope (if you have one or are planning on getting one) and your Fluke 75v dimm.

Here's an example:
https://www.digikey.com/product-detail/en/b-k-precision/PR2000B/BKPR2000B-ND/3783011

PR2000B
Datasheet
https://bkpmedia.s3.amazonaws.com/downloads/manuals/en-us/PR250B_manual.pdf
Digi-Key Part Number    BKPR2000B-ND    
Manufacturer    B&K Precision    
Manufacturer Part Number    PR2000B    
Description    OSCOPE PROBE X100 200MHZ 100M    
Manufacturer Standard Lead Time    8 Weeks    
Detailed Description    100:1 Voltage Probe 200MHz 48.000" (1219.20mm) Black and Red Oscilloscope Probe Test Lead 100M Input Resistance 2000V

This one has a 200 Mhz bandwidth!
 :popcorn:

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