NABL Accredited · CC-2480 · Est. 2004 · Gujarat's Trusted Calibration Lab
NABL-accredited calibration for insulation resistance testers (megohmmeters). 100 V to 10 kV test voltage. 0.1 MΩ to 20 TΩ resistance range. IEC 61557-2. All makes.
0.1 MΩ–20 TΩ
Resistance
100 V–10 kV
Test Voltage
IEC 61557-2
Standard
IEC 61557-2
Insulation Resistance Measurement
NABL Accredited
CC-2480
— WHAT IS INSULATION TESTER CALIBRATION —
Think of a quality lab that relies on an insulation 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.
Insulation 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 —
Handheld / High-Voltage / DAR-PI / Combo / Transformer / IMD · All Makes · IEC 61557-2 · NABL
Standard megohmmeters for motor, cable, and transformer insulation testing.
High-voltage insulation testers for critical HV equipment and switchgear.
Hi-Pot testers for dielectric strength testing of electrical equipment.
Leakage current testers for safety compliance of electrical appliances.
Continuity and bonding testers for earthing and protective conductor testing.
Earth loop impedance testers for fault loop and protective conductor testing.
— OUR PROCESS —
Megohmmeter received. Available test voltages, resistance ranges, and special functions (DAR, PI) documented.
High-voltage resistance standard connected to megohmmeter output. Test voltage set to nominal value.
Insulation resistance calibrated at 3–5 setpoints per test voltage (e.g., 1 MΩ, 10 MΩ, 100 MΩ, 1 GΩ, 1 TΩ) against certified resistance standard.
Actual output test voltage measured at all nominal settings (100 V, 250 V, 500 V, 1 kV, etc.) against NABL-traceable voltmeter.
Error at each resistance setpoint documented. Expanded uncertainty (k=2) per GUM. Certificate lists each test voltage and resistance point.
NABL CC-2480 certificate with resistance data, test voltage, deviations, uncertainty (k=2), IEC 61557-2 traceability.
— STANDARDS & COMPLIANCE —
IEC 61557-2
Insulation Resistance Measurement
IEC 61557-8
Insulation Monitoring Devices
IEEE 43-2013
Motor Winding Insulation Testing
ISO/IEC 17025
NABL Accreditation Standard
Prism holds NABL CC-2480 under ISO/IEC 17025:2017. Megohmmeter and insulation tester certificates accepted by ISO 9001, IEC 60364, and all electrical safety 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 across Gujarat. Typical 1-day turnaround.
Why Choose Prism
Since 2004, every NABL megohmmeter certificate from Prism has been accepted by ISO 9001, electrical safety, and process industry auditors — no rejections.
— FAQ —
Get In Touch
Share the make/model, test voltage, resistance range, and quantity. We respond within 2 business hours.
— FROM OUR BLOG —
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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.