TL;DR: Legal verification (kiểm định) confirms a measuring instrument meets statutory requirements — mandatory for Group-2 instruments and performed only by state-designated bodies in Vietnam. Calibration (hiệu chuẩn) compares an instrument against a measurement standard to determine its error — voluntary, performed by ISO/IEC 17025 laboratories such as Techmaster Electronics JSC (accredited by ANAB, USA — certificate AC-1868).

Comparison: verification, calibration, testing, qualification

Criteria Verification Calibration Testing Qualification
Purpose Confirm legal compliance Determine error vs standard Evaluate technical characteristics Confirm fitness for intended use (DQ/IQ/OQ/PQ)
Mandatory? Yes (Group-2 instruments) Voluntary (ISO 9001, IATF, GMP…) Per regulation or customer Per GMP/GSP or customer
Performed by State-designated bodies (QUATEST, VMI…) ISO/IEC 17025 laboratories Accredited test labs Specialist technical providers
Output Verification stamp/certificate Calibration certificate with results Test report Validation dossier

Where to get electronic equipment verified in Vietnam

For instruments subject to mandatory verification, go to state-designated bodies such as QUATEST 1/2/3, the Vietnam Metrology Institute (VMI) or provincial standards-metrology-quality centers.

Scope note: Techmaster Electronics JSC provides ISO/IEC 17025 accredited calibration (ANAB, AC-1868) across 12 measurement fields — it is not a state verification body. For statutory verification needs, Techmaster advises customers free of charge and refers them to the appropriate designated body; for accuracy assurance of electronic instruments (oscilloscopes, spectrum analyzers, DMMs, power supplies…), calibration at Techmaster is fast and internationally recognized through ILAC-MRA.

FAQ

Can calibration replace legal verification?

No. Verification is a legal requirement for Group-2 instruments; calibration serves quality control. An instrument may need both depending on its use.

Do factory electronic instruments require legal verification in Vietnam?

Most electronic instruments used in production (oscilloscopes, DMMs, spectrum analyzers…) are not on the mandatory verification list — they only need periodic calibration under your quality system.

Are Techmaster calibration certificates internationally recognized?

Yes. Techmaster’s laboratory is ISO/IEC 17025 accredited by ANAB (AC-1868); results are recognized globally through the ILAC-MRA arrangement.