Products > Test Equipment
HSPY Power Supply
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inzekt:
Does the sticker mean, that the voltage range on this PSU is 999.9V? I'm asking because I would like to use it as an exact 1000V DC source for matching my DMMs to my calibrated ones, so is it possible to calibrate it to output the exact voltage? Someone wrote that the PSU has some internal offset setting in the menus. How does it work? Can I go past 1000V a tad, if needed?
Kean:

--- Quote from: inzekt on June 13, 2024, 01:24:37 pm ---Does the sticker mean, that the voltage range on this PSU is 999.9V? I'm asking because I would like to use it as an exact 1000V DC source for matching my DMMs to my calibrated ones, so is it possible to calibrate it to output the exact voltage? Someone wrote that the PSU has some internal offset setting in the menus. How does it work? Can I go past 1000V a tad, if needed?

--- End quote ---

This is really not a suitable supply for comparing DMM calibration.  As mentioned above it is way too noisy, and quite probably not otherwise very stable.
inzekt:

--- Quote from: Kean on June 14, 2024, 08:08:31 am ---
--- Quote from: inzekt on June 13, 2024, 01:24:37 pm ---Does the sticker mean, that the voltage range on this PSU is 999.9V? I'm asking because I would like to use it as an exact 1000V DC source for matching my DMMs to my calibrated ones, so is it possible to calibrate it to output the exact voltage? Someone wrote that the PSU has some internal offset setting in the menus. How does it work? Can I go past 1000V a tad, if needed?

--- End quote ---

This is really not a suitable supply for comparing DMM calibration.  As mentioned above it is way too noisy, and quite probably not otherwise very stable.

--- End quote ---

Hmm, just considering, that my 87V is calibrated to spec what is 0.05%+1 with 1V of resolution in that range, I can use to validate it's value and my other 6000 count meters needed to be matched (Fluke 175, 179 and a few Brymens) has a precision like 2% (at 1000V it is like ±10V) + 2 counts, it is not that precise?
I could not find any range or any specs, but it's hard to imagine it will bounce around tens of Volts, isn't it? How stable are these PSUs anyway? If it is that bad, should I just use a simple DC-DC boost converter and make that 1000V happen within 2% at low currents?
ass20:
hi all
What is SMPS chip used in power suplly? tl494 ?
Wolfgang:
The Chinese are learning the hard way that switching MOSFETs dont last long when used as pass elements.
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