“The ability to relate individual measurement results, through a contiguous sequence of measurement accuracy verifications, to nationally or internationally accepted measurement systems (e.g., NIST, ISO, quantum mechanical standards).”
[NCSL RP-1]
“The property of the result of a measurement whereby it can be related to stated references, usually national or international standards, through an unbroken chain of comparisons all having stated uncertainties.”
[VIM, 1993, Par. 6.10]
“The property of the result of a measurement whereby it can be related to appropriate standards, generally national or international standards, through an unbroken chain of comparisons.”
[ANSI/NCSL Z540-1-1994]
What is Reverse Traceability?
“The unbroken path from the calibration standard to the end user.” [NCSL Glossary of Metrology Related Terms]
InnoCal®, is traceable to the National Institute of Standards and Technology (NIST)
A2LA Scope of Accreditation (234K .pdf)