Calibration, legal verification, and the field term “검교정” look alike but mean different things. Mixing them up leads to confusion about what your instrument actually needs. Ace Electronics, a KOLAS-accredited laboratory (accreditation no. KC23-416), sorts the terms out.
Calibration determines an instrument’s error and uncertainty with no pass/fail judgment. Legal verification is a government judgment of compliance with a legal criterion. “검교정” is a colloquial term — what an accredited laboratory performs is precisely “calibration.”
The differences at a glance
| Calibration | Legal verification | |
|---|---|---|
| Purpose | Determine error and uncertainty | Judge compliance with a legal criterion |
| Result | Values provided (no pass/fail) | Pass / fail |
| Basis | Framework Act on National Standards · ISO/IEC 17025 | Measures Act and related laws |
| Performed by | (Accredited) calibration laboratory | Government / designated body |
| Document | Calibration certificate | Verification mark (stamp/seal) |
What is calibration?
Calibration establishes the relationship between the values an instrument indicates and those realized by a reference standard, determining the error and the confidence range (measurement uncertainty). The point is not to pass or fail the device but to reveal how far off it is — securing traceability to national measurement standards.
KOLAS-accredited calibration in particular follows ISO/IEC 17025 and carries international recognition (ILAC-MRA). See our KOLAS calibration certificate guide for details.
What is legal verification?
Legal verification is a government (or designated body) judgment of whether an instrument meets a legal criterion. It applies to “legal measuring instruments” used in trade or certification (gas meters, water meters, electricity meters, fuel dispensers), producing a pass/fail result — the device may be used only if it passes.
“검교정” is not a precise term
“검교정” is a field expression combining inspection and calibration; it is not part of standard metrology vocabulary. It is not wrong to use casually, but in formal documents or procurement specs it is clearer to say “calibration” (accuracy management) or “verification” (legal judgment) as appropriate. What an accredited laboratory does — issuing a calibration certificate — is precisely “calibration.”
So what does a gas detector need?
Gas detectors generally do not fall under the legal measuring instruments subject to verification under the Act on Measures. Their certification, testing, and inspection requirements can vary by product use and applicable standards, and calibration is carried out to manage measurement accuracy. In short, to keep a device reporting accurate values, periodic calibration is what you need. The exact regulations depend on the device, facility, and use — if it is unclear, contact us and we will help.
For intervals and the legal basis, see the calibration cycle guide.
