Products > Test Equipment
How good DC voltage standard do you need?
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zepto:
.02% accuracy over what time period? What are the stability specs? What are the noise specs? What is the setting resolution? 10v seems quite limiting, imo. $350 seems a lot from the limited info you gave.

Older voltage standard might have .05% annual accuracy but .001% hourly stability...aliexpress garbage not superior to these devices, despite volume of youtube shills.

An uncalibrated and inaccurate but stable source can be useful when combined with an accurate, calibrated measurement device.
fourfathom:
I'm not doing *any* voltage/current measurements that require any particular accuracy, but as an occasional check I grab all my DVMs (usually three or four, all hand-held, ranging from Fluke to cheap Amazon Chinese, from 1 to 40 years in age), and connect them in parallel to measure the output voltage of a bench power-supply, or in series with a resistor to measure the current.  As long as they agree reasonably well I am happy.  If one is a big outlier I won't use it when it matters.
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