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Thermal EMF
The voltage generated when two dissimilar metals joined together are heated.
Treability
The ability to relate individual measurement results to legally defined national standards
through an unbroken chain of comparisons. Treability requires evidence produced on a
continuing basis, such as calibration records, that the measurement process is producing
results for which the total measurement uncertainty relative to national standards is
quantified.
Transfer
See "AC-DC transfer".
Transfer Error
Error induced by the process of comparing one standard or instrument with another. This
does not include the uncertainty of the transfer standard.
Transfer Stability
Change in the AC-DC Difference correction over time, with stated conditions.
Transfer Standard
Any standard used to intercompare one measurement or source device with another. Note
that a transfer standard needs only to be stable for the duration of the transfer. It does not
need an assigned value.
Transport Standard
A transfer standard that is rugged enough to allow the shipment by common carrier to
another location.
True Value
Also called as legal value, the cepted consensus, i.e., the correct value of the quantity
being measured.
Uncertainty
The range of values, usually centered on the indicated or requested value, within which
the true, cepted, or consensus value is expected to lie with stated probability or
confidence. Fluke uses 99.7 % (3 ) confidence limits. Uncertainty is a quantification of
incury.
Units
Symbols or names that define the measured quantities. Examples of units are: V, mV, A,
kW, and dBm. See also "SI System of Units".
UUT (Unit Under Test)
An abbreviated name for an instrument that is being tested or calibrated.
Glossary of AC-DC Transfer Related Terms
Appendices
A
A-9
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