NABL Accredited · CC-2480 · Est. 2004 · Gujarat's Trusted Calibration Lab
NABL-accredited calibration for single-phase wattmeters, digital power meters, kWh meters, and power transducers. W / VA / VAR / PF / kWh. IEC 62053. All makes.
±0.2%
Accuracy
0.2S–Class 2
Class
IEC 62053
Standard
IEC 62053
Power & Energy Meter Standard
NABL Accredited
CC-2480
— WHAT IS POWER METER CALIBRATION —
Think of a quality lab that relies on a power meter 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.
Power Meter 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 —
Wattmeter / Digital Power / kWh / Portable / Transducer / Smart Meter · IEC 62053 · NABL
Single-phase power meters for real-time power monitoring in residential and commercial systems.
Single-phase kWh energy meters for electricity consumption measurement.
Digital wattmeters for precise active power measurement in laboratory and field.
Power factor meters for measuring cos φ in AC circuits.
VAr meters for reactive power measurement in electrical networks.
Single-phase power analyzers for comprehensive power quality analysis.
— OUR PROCESS —
Power / energy meter received. Class designation, voltage range, current input (direct or CT secondary), and PF range documented.
NABL-traceable single-phase power standard (precision V + I synthesizer with known PF) connected to meter under test.
Active power calibrated at 5 setpoints (20%, 40%, 60%, 80%, 100% of rated power) at unity power factor.
Power calibrated at rated load at PF=0.5 lagging. VA and VAR readings verified. PF indication accuracy documented.
For energy meters: percentage error at rated load and minimum load. IEC 62053-21/22 test sequence followed.
NABL CC-2480 certificate with power data, deviations, uncertainty (k=2), IEC 62053 / IEC 61010 traceability.
— STANDARDS & COMPLIANCE —
IEC 62053-21
Class 1 & 2 Active Energy Meters
IEC 62053-22
Class 0.2S & 0.5S Active Energy Meters
IEC 60051
Analogue Indicating Instruments
ISO/IEC 17025
NABL Accreditation Standard
Prism holds NABL CC-2480 under ISO/IEC 17025:2017. Power and energy meter certificates accepted by ISO 9001, energy audit bodies, and all process industry QMS audit bodies.
— NON-NABL CALIBRATION —
For routine maintenance, bulk calibration, or internal QC checks where a full NABL certificate is not mandatory — Prism offers cost-effective non-NABL calibration using the same NABL-traceable reference standards and trained engineers.
All non-NABL work uses NABL-certified reference standards — readings are still reliable and defensible.
Without full NABL documentation, instruments return faster — ideal for urgent production schedules.
Non-NABL calibration costs less — practical for large batches or routine periodic checks.
Available at your facility or at our Vatva lab — same quality, more flexibility.
— AREAS WE SERVICE —
Courier pick-up and delivery. 1-day turnaround for most power meters.
Why Choose Prism
Since 2004, every NABL power meter certificate from Prism has been accepted by ISO 9001 and energy audit bodies — no rejections.
— FAQ —
Get In Touch
Share the make/model, class, voltage/current range, and quantity. We respond within 2 business hours.
— FROM OUR BLOG —
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Digital multimeters (DMMs) are the universal electrical measurement tool. Annual NABL calibration ensures your DMM meets specified accuracy and your electrical measurements are traceable.
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 falling outside our active NABL scope are processed with standard metrological traceability to NPL/BIPM national standards.