Test Weight & Weight Set Calibration Services
The weights that check your scales answer to a higher standard — and wear, corrosion, and handling never stop working on them.
ACS Calibration delivers NIST-traceable, audit-ready test weight calibration, available at the ACS central lab or directly on-site at facilities across the Southeast. Every certificate is backed by real measurement data, and accredited certificates are available for instruments on our PJLA scope.
Scales & Balances We Calibrate
From 0.1 mg analytical balances to 5,000 lb floor scales — if it weighs, we calibrate it.
Frequently serviced brands: Ohaus, Mettler Toledo, CAS, A&D Weighing, Rice Lake, Health-o-meter, ULINE, KERN, Chatillon, and Seca — plus dozens more.
The Standard Behind Your Daily Checks
Test weights are where your internal weighing program touches reality: the daily balance check, the weekly scale verification, the weight the auditor asks to see the certificate for. Weights drift too — wear removes metal, corrosion and contamination add it, and a weight that’s shifted makes every check performed with it wrong in the same direction.
We verify test weights and complete weight sets against our reference mass standards, documenting NIST-traceable as-found values per weight — cast iron, stainless, and analytical classes alike — so your in-house checks rest on evidence instead of assumption. Sets return with one certificate cycle and per-piece data.
Weight sets pair naturally with the scales and balances they check — align everything to one due date and the whole weighing program audits clean.
What You Get With Every Calibration
- NIST-traceable calibration certificate with real measurement data — not just a pass/fail sticker
- As-found and as-left readings, so drift is documented
- ISO/IEC 17025 accredited certificate with reported uncertainty — on request
- Calibration label with due date, plus a reminder before your next calibration is due
Why Companies Choose ACS
NIST-Traceable, Accredited on Request
Every calibration ships with real measurement data and a NIST-traceable certificate — and accredited certificates are available for instruments on our PJLA scope.
4–6 Business Day Typical Turnaround
Keep production moving. Most instruments are typically completed in 4 to 6 business days from arrival, with rush options available when a line is down.
Flexible Logistics
Mail your instruments in, or schedule onsite calibration and we come to your floor — serving Alabama, Florida, Georgia, Mississippi, Tennessee, South Carolina, and beyond.