NABL Accredited · Dimensional Calibration
Vernier Caliper & Micrometer Calibration
(IS 3651 / ISO 13225 — Length Calibration)
NABL-accredited calibration of Vernier calipers and micrometers per IS 3651 using NPL-traceable slip gauges — verifying scale accuracy, jaw flatness, repeatability and zero error for laboratory dimensional measurement.
IS 3651
Standard
±2μm
Accuracy
1 Day
Report TAT
NABL
Accredited
NABL Accredited Lab · ISO/IEC 17025:2017
Digital Reports via Autovity QLMS
Pan-India · 7 Lab Locations
Est. 2009 · 20,000+ Projects
Overview
What is the Vernier Caliper & Micrometer Calibration?
Vernier Calipers and Micrometers are the most widely used hand-held measuring instruments in testing laboratories — used for specimen dimension measurement, mould size verification, aggregate particle size and gauge length checking.
At Global Lab, Vernier caliper and micrometer calibration uses NPL-traceable gauge blocks (Grade 1 per IS 2984). Calibration points cover the full measuring range — jaw flatness, parallelism, zero error and scale accuracy verified. Results issued with measurement uncertainty per GUM.
Non-Destructive
Minimal surface preparation. Structure integrity is preserved throughout testing.
Fast Turnaround
On-site results within hours. Digital reports dispatched within 24 hours.
NABL Certified
All test and calibration results are backed by traceable measurements and standardized procedures.
Pan-India Coverage
Site engineers deployed across 7 lab locations and all major project sites.
Digital Reporting
Access reports anytime via Autovity QLMS client dashboard — zero paperwork.
High Accuracy
Results correlated to cube compressive strength with ±2% precision range.
Test in Action
Vernier Caliper & Micrometer Calibration — Site Images
Vernier Caliper Calibrated with Grade 1 Slip Gauges
Micrometer Zero Error and Scale Accuracy Check
NABL Certificate with Measurement Uncertainty per GUM
Test Procedure
How the Vernier Caliper & Micrometer Calibration is Conducted
-
1
Surface Preparation
A shallow groove (approx. 25mm deep) is cut into the concrete surface using a diamond-tipped cutting tool. The surface is cleaned of dust and debris. -
2
Insert Disc Placement
A specially designed steel insert disc is placed into the groove. A thin rod connects the disc to the pullout apparatus above the surface. -
3
Hydraulic Pullout Force Application
A hydraulic jack applies a steady, controlled pullout force to the insert disc via the reaction ring resting on the concrete surface. -
4
Failure Load Recording
The maximum force at which the concrete cone is extracted is recorded. A digital load indicator provides real-time readings with data logging. -
5
Strength Calculation & Reporting
The pullout force is correlated to cube compressive strength using established calibration curves. NABL-accredited reports are issued via Autovity QLMS.
Standards & Specifications
Applicable Test Standards
| Standard | Title | Scope | Type |
|---|---|---|---|
| IS 3651 | Vernier Calipers — Specification and Methods of Test | Vernier Caliper | Indian Standard |
| IS 1832 | Outside Micrometers — Specification | Micrometer | Indian Standard |
| IS 2984 | Gauge Blocks — Specification | Slip Gauges | Indian Standard |
| ISO 13225 | Dimensional Metrology — Local Calibration | Dimensional Calibration | ISO |
Applications
Where is the Vernier Caliper & Micrometer Calibration Used?
Laboratory Vernier caliper calibration for NABL annual schedule
Micrometer calibration for wire and sheet metal QC
Specimen dimension caliper calibration before concrete mix design
Aggregate particle size caliper calibration for IS 2386
ISO/IEC 17025 compliance instrument calibration
Incoming inspection caliper calibration for manufacturing QC
Why Choose Global Lab
Our Advantages
NABL Accredited CertificatesLegally valid IS 3651 certificates for NABL annual schedule.
Fast 1-Day CertificateCertificates issued within 1 working day.
Uncertainty BudgetFull GUM-compliant uncertainty in every certificate.
All TypesDigital, dial, Vernier calipers and micrometers covered.
Pan-India CoverageDimensional calibration at all 7 locations.
Batch SubmissionMultiple instruments in one submission.