Dictionary
ITS-90
The International Temperature Scale of 1990: defined fixed points (e.g. the triple point of water, 273.16 K) and specified interpolation instruments through…
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8 results for “ITS-90”
…The International Temperature Scale of 1990 (ITS-90) assigns exact temperature values to a ladder of highly reproducible fixed points — the triple point of…
The interpolation instrument of the ITS-90 between defined fixed points over most of its range: a strain-free platinum resistor whose resistance ratio…
Documents
SOP 33 — Calibration Weight Carts
…When plotting each new variability value, verify that it is within previously accepted limits. Alternatively, though not preferred, 7 to 12 repeated observations are…
…2.4.3.4 Adjust the standard prover to its reference mark or record the neck reading, and then discharge into the unknown prover…
…Summary The tape to be calibrated is laid over the bench scale and sufficient tension is applied to insure that it lies flat on…
Documents
SOP 2 — Applying Air Buoyancy
…https://doi.org /10.6028/NIST.IR .6969 - 2019 If a single-pan balance with built-in weights is used, it is probable that…
Documents
SOP 31 — Scale Plate Calibration
…it will be used by placing a precision spirit or electronic digital level vertically on the neck on at least two locations, 90 degrees…