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How can I calibrate the High Voltage Probe FLUKE 80K-40?

Hello

What is the procedure to calibrate the High Voltage Probe FLUKE 80K-40?, because I only can reproduce 1kV with my 5520A

Is it necessary to calibrate it in the whole range from 0 V to 40kV or only from 0 to 1kV?

and if I need to calibrate from 0V to 40 kV, How can I calibrate particularly for above 1kV?

Thanks.

7 comments

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Michael Johnston

You'll need a high voltage source. If you can't get one that's accurate enough, you would need a high voltage divider to compare to. An alternative would just be to send it to a vendor with the capability to do it (would probably be cheaper).

A 1 kV test would be an ok functional check, but the Instruction Sheet from Fluke (http://media.fluke.com/documents/80k40___iseng0900.pdf) says to check it at 25 kV.

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Héctor Alejandro Raimundo Cabrejo

Let me know if i'm wrong, but I thought if I have a DC Voltmeter I would measure the Output Voltage from the High Voltage Probe, is it also necessary to have a divider to compare? and do you know some high voltage source that you can recommend to me?

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Michael Johnston

Like it says in that instruction sheet I linked in my first post, if your source is accurate to 0.25%, you wouldn't need a standard divider. The 80K-40 is spec'd at +/-1%, so you can either get standards good enough or guardband I suppose.

I don't have a recommended source. You can just search for 25 kV high voltage sources. As far as a divider if you need it, I've used Ross Engineering's dividers in the past.

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Jeff Stevens

I used to use a Valhalla high voltage meter as a monitor, which I think you can still pick up used ones. Not sure who could cal them. For high voltage sources I'd recommend Spellman: www.spellmanhv.com or Glassman; www.glassmanhv.com.

 

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Héctor Alejandro Raimundo Cabrejo

Thank you so much dmjohnston and Jeff Stevens for your help 

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William Green

http://www.rossengineeringcorp.com/products/measurement/ac-dc-digital-hipots.html

Above is a link for the Ross ACC-402 AC/DC Hipot Tester.

 Voltage accuracy: ±0.1% to ±1% with included certified correction chart. Not sure where 25kV is on the chart. I've used their Voltage Dividers for a long time. They're really good. You can call Ross Engineering if you want. If anybody can help, it's these guys.

http://www.rossengineeringcorp.com/contacts.html

80K-40's are ±1% DC and 5% AC

 See note in UUT Instruction Sheet (PN 481978): 
 
 * The input impedance of Autoranging Fluke handheld digital
 multimeters varies as a function of range. The only range that
 deviates significantly from 10 MW is the 3V (Models 21, 23, 25,
 27, 70, 73, 75, 77) or 4V (Models 10, 11, 12, 29, 79, 83, 85, 86,
 87, 88) range where the impedance is 11.11 MW. To enhance the
 measurement accuracy when using this range, apply a correction
 factor of 0.99, i.e. multiply the displayed reading by .99.
 
The Fluke 80K-40 isn't the greatest voltage divider.

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