As-found and as-left data
Updated 2026-10-27
Data records
- As-found data are the readings an instrument gives, compared with the reference standard, when it arrives for calibration and before any adjustment, and as-left data are the readings after any adjustment or repair. The pair shows how far the instrument had drifted during the previous interval and the state in which it was returned to service.
- The term is written As-found and as-left data. Value: As-found and as-left data.
- A maker's description of calibration certificates lists as-found and as-left data among the usual contents of a certificate and explains that the comparison between them shows the condition of the instrument before and after calibration, and how far it had drifted if it was out of specification and required adjustment.
Sources
- Electrical Testing Reference editorial taxonomy, Electrical Testing Reference editorial taxonomy of test methods, 2026-10 edition, Electrical Testing Reference. Held as: Own observation.
- Fluke learn article, What Is a Calibration Certificate and Why Do You Need One?, web page edition, Fluke. Held as: Public page. Publisher page
Changelog (6 entries)
| Date | Revision | Change |
|---|---|---|
| 2026-10-27 | created (gloss.as-found-as-left.definition) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (gloss.as-found-as-left.definition) | |
| 2026-10-27 | created (gloss.as-found-as-left.title) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (gloss.as-found-as-left.title) | |
| 2026-10-27 | created (gloss.as-found-as-left.usage) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (gloss.as-found-as-left.usage) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"As-found and as-left data." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/glossary/as-found-as-left/.
Test Instrument Reference, As-found and as-left data (Oct. 27, 2026), https://www.testinstrumentreference.com/glossary/as-found-as-left/.
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title = {As-found and as-left data},
howpublished = {\url{https://www.testinstrumentreference.com/glossary/as-found-as-left/}},
organization = {Test Instrument Reference},
publisher = {Test Instrument Reference},
year = {2026},
note = {last substantive change 2026-10-27}
}{{cite web |title=As-found and as-left data |website=Test Instrument Reference |publisher=Test Instrument Reference |url=https://www.testinstrumentreference.com/glossary/as-found-as-left/ |date=2026-10-27 |access-date=}}