NABL Accredited · CC-2480 · Est. 2004 · Gujarat's Trusted Calibration Lab
NABL-accredited calibration for Leeb/rebound, UCI, and portable Rockwell testers. ASTM A956 / ISO 16859 traceable. Accepted by ISO 9001, IATF 16949 audit bodies across Gujarat.
±6 HLD
Accuracy
Leeb / UCI
Method
ASTM A956
Standard
ASTM A956
Leeb Hardness Standard
NABL Accredited
CC-2480
— WHAT IS PORTABLE HARDNESS TESTER CALIBRATION —
Think of a quality lab that relies on a portable hardness tester for daily measurements. If it has drifted even slightly from its true value, every reading becomes unreliable — leading to defective products, failed audits, or safety risks. Regular calibration is the only way to confirm your instrument is telling the truth.
Portable Hardness Tester calibration means comparing its readings against a NABL-traceable certified reference standard at multiple test points, recording the deviations, adjusting where possible, and issuing an NABL certificate — accepted by ISO 9001, IATF 16949, and all quality auditors.
Compare readings against a NABL-traceable reference standard across the full measurement range.
Adjust or document deviations so your instrument reads within accepted tolerance.
Issue a NABL-accredited certificate (CC-2480) with full traceability documentation.
— INSTRUMENTS COVERED —
Leeb / UCI / Portable Rockwell · All makes · ASTM A956, ISO 16859 · NABL accredited
Leeb rebound hardness testers for non-destructive portable hardness testing.
UCI (Ultrasonic Contact Impedance) testers for thin parts and coatings.
EQUOTIP portable hardness testers for large and heavy components.
Portable Rockwell testers for field hardness testing without fixed machine.
— OUR PROCESS —
Tester received and tagged. Impact device, probe tip, anvil, and display unit inspected for wear and battery state.
NPL-traceable portable hardness reference blocks used to measure as-found deviation on the specified scale.
Impact device or UCI probe calibrated using reference blocks at two hardness levels. Slope and offset corrections applied as required.
Converted hardness values (HRC, HBW, HV from Leeb) verified against reference values to confirm conversion accuracy.
Post-correction readings on reference blocks. Repeatability of 5 consecutive readings calculated and documented.
NABL CC-2480 certificate issued with as-found/as-left data, expanded uncertainty (k=2), applicable standard traceability.
— STANDARDS & COMPLIANCE —
ASTM A956
Leeb Hardness Testing of Steel
ISO 16859-1
Leeb Hardness Test Method
ASTM A1038
UCI Portable Hardness Testing
ISO/IEC 17025
NABL Accreditation Standard
Prism holds NABL CC-2480 under ISO/IEC 17025:2017. Portable hardness tester certificates accepted by ISO 9001, IATF 16949, and all structural steel and heavy engineering audit bodies.
— NON-NABL CALIBRATION —
For routine site checks or workshops not requiring NABL certification — same engineers, same reference blocks, lower cost.
All calibrations use NPL-traceable portable reference blocks — only the certificate type differs.
Non-NABL portable tester jobs completed quickly — ideal for large field instrument batches.
Lower cost than NABL — right for site instruments and non-critical structural verification.
We calibrate at your site across Gujarat — same specialist team, same accuracy.
— AREAS WE SERVICE —
Engineers carry certified reference blocks to your facility. Onsite portable hardness tester calibration with minimal disruption.
Why Choose Prism
Since 2004, every NABL hardness certificate issued by Prism has been accepted by ISO 9001, IATF 16949, and structural engineering audit bodies — no rejections.
— FAQ —
Get In Touch
Tell us the tester type (Leeb/UCI/Rockwell), make/model, quantity, and location. We respond within 2 business hours.
— FROM OUR BLOG —
Surface roughness (Ra, Rz) is a critical quality parameter in precision machining, sealing surfaces, and coating adhesion. NABL-certified roughness tester calibration ensures accurate surface texture measurements.
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Hardness testing is fundamental to material qualification in automotive, tooling, and steel industries. NABL-certified hardness tester calibration ensures traceable, accurate hardness values.
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Gujarat's steel and fabrication sector — from mini steel mills to pressure vessel manufacturers — requires NABL-certified calibration for BIS material testing, ISO 9001, and structural safety compliance.
Read MoreNABL Accreditation Disclaimer
Calibration services are provided under NABL Certificate CC-2480 in strict accordance with our officially approved scope of accreditation (ISO/IEC 17025:2017). Parameters or onsite conditions falling outside our active NABL scope are processed with standard metrological traceability to NPL/BIPM national standards.