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What is the confidence level for Keysight DMM specifications?

Question asked by JacoEngelbrecht on Aug 16, 2019
Latest reply on Aug 22, 2019 by Dr_Frank

For example, the Keysight 3458A 90-day DC Voltage accuracy specification for a 1 V nominal reading in 1 V range would be 4.9 uV. When using this accuracy specification in an uncertainty budget one needs to know what confidence level is assosiate with the specification e.g. 95,45% (k = 2) or 99% (k = 2.576)?

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