Are the uncertainty specifications at the 1-sigma (68%) or 2 sigma (95%)?
I am performing some uncertainty calculatons on my WT300E series power analyzer. Are these uncertainty specification at the 1-sigma (68%) or 2 sigma (95%)? I would assume 2-sigma but the datasheet doesn't explicitly state this so I would like confirmation.
ANSWER: The WT300 bulletin specifices accuracy, not uncertainty. The specification of accuracy is the 100% guaranteed value under the conditions specified in the data sheet, and if the error of the measured value exceeds the range of accuracy, the product will be the subject to repair. So, there is no implied statistical / distribution in our bulletin’s accuracy specification.
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- 0.1% of rdg + 0.05% of rng
- DC, 0.1Hz to 100kHz
- Standby Power, Energy Star®, SPEC Power® and IEC62301/EN50564