"Traceability" is more than a buzzword—it’s the golden thread linking your field instruments to global measurement certainty. In oil and gas pressure calibration, traceability ensures every reading can be validated against a recognized primary standard through an unbroken chain of comparisons.

Here’s how it works:

1. Primary Standards (e.g., Dead Weight Testers) at national labs define pressure with near-zero uncertainty.

2. Reference Standards in accredited calibration labs are calibrated against primaries.

3. Working Standards used on-site or in workshops are calibrated against references.

4. Field Instruments (gauges, transmitters) are calibrated against working standards.

Compliance with ISO/IEC 17025 and API MPMS Ch. 21.1 demands documented traceability. Any break in this chain risks measurement drift, non-compliance, and safety gaps.