Quick Answer
Prism Calibration Centre (NABL CC-2480) provides NABL-certified electrical instrument calibration in Gujarat for multimeters, clamp meters, oscilloscopes, power analysers, current transformers, insulation testers, earth resistance testers, and signal generators — covering DC to 1 MHz frequency range.
Key Takeaways
- Electrical calibration scope: DC voltage (1 mV to 1000 V), current (1 µA to 1000 A), resistance (0.01 Ω to 10 GΩ).
- AC measurements calibrated at 50 Hz and up to 1 MHz frequency.
- Oscilloscope calibration covers bandwidth verification, rise time, and time base accuracy.
- Power analyser calibration covers active power (W), reactive power (VAR), power factor, and harmonics.
- Insulation resistance tester calibration for motors, cables, and transformer maintenance.
Electrical Instruments We Calibrate in Gujarat
- Digital & Analog Multimeters (Fluke, Hioki, Mastech, Kyoritsu)
- Clamp Meters / Clip-on CT meters
- Oscilloscopes (bandwidth 10 MHz to 1 GHz)
- Function / Signal Generators (sine, square, triangle waveforms)
- Power Analysers & Power Quality Analysers
- Current Transformers (CTs) and Voltage Transformers (PTs)
- Insulation Resistance Testers / Meggers (500 V to 10 kV)
- Earth Resistance Testers / Ground Resistance Meters
- Decade Resistance Boxes and Decade Capacitance Boxes
- LCR Meters and Impedance Analysers
- Frequency Counters
- Panel Meters (ammeter, voltmeter, wattmeter)
Multimeter Calibration — The Most Common Request
Multimeters are the most widely used electrical instruments in Gujarat's manufacturing, utilities, and maintenance sectors. Proper multimeter calibration ensures accuracy in fault diagnosis, quality control, and electrical safety. Prism calibrates all types of DMMs (digital multimeters) using a Fluke 5720A multi-function calibrator as the reference standard.
DC Voltage Calibration
Test at 100 mV, 1 V, 10 V, 100 V, 1000 V using precision DC voltage source traceable to NPL India.
DC Current Calibration
Test at 100 µA, 1 mA, 10 mA, 100 mA, 1 A, 10 A using precision current source and shunt.
AC Voltage Calibration
Test at 50 Hz and 1 kHz for 1 V, 10 V, 100 V, 1000 V ranges.
Resistance Calibration
Test at 100 Ω, 1 kΩ, 10 kΩ, 1 MΩ, 10 MΩ using precision resistance standards.
Electrical Calibration for Gujarat's Power Sector
Gujarat is India's power-surplus state, with GSECL thermal plants, Adani Power, Torrent Power, and a massive renewable energy sector (solar at Charanka, wind in Kutch). All power plants require NABL-calibrated electrical instruments for energy metering, protection relay testing, and maintenance. Prism provides calibration for GSECL, GUVNL, and private power producers across Gujarat.
Frequently Asked Questions
Can Prism calibrate 4.5-digit and 6.5-digit precision multimeters?
Yes. Prism calibrates multimeters from 3.5-digit handheld units to 6.5-digit bench multimeters (Agilent 34401A, Keithley 2000) using a Fluke 5720A multi-function calibrator with 10 ppm accuracy.
Does Prism calibrate oscilloscopes?
Yes. Prism calibrates oscilloscopes for DC gain accuracy, bandwidth (10 MHz to 600 MHz typical), time base accuracy, and trigger level. Brands: Tektronix, Keysight, Rigol, Siglent, GW Instek.
Is CT (current transformer) calibration available at Prism?
Yes. Prism calibrates metering-class CTs (0.1, 0.2, 0.5, 1.0, 3.0) and protection-class CTs (5P10, 5P20, 10P10) per IEC 61869-2 / IS 2705.
Can Prism calibrate meggers (insulation resistance testers)?
Yes. Prism calibrates insulation resistance testers (meggers) for DC voltage output accuracy (500 V, 1000 V, 2500 V, 5000 V, 10 kV) and resistance measurement accuracy using precision resistance standards.
How often should electrical test instruments be calibrated?
Annual calibration is the industry standard. Instruments used for safety testing (insulation resistance, earth continuity) should be calibrated every 6 months.
Written by
Er. Parthiv Kinariwala
Managing Director · Prism Calibration Centre · NABL CC-2480 · Ahmedabad
Er. Parthiv Kinariwala founded Prism Calibration Centre in 2004 and has over 20 years of hands-on experience in calibration engineering, NABL accreditation, and industrial compliance. His team performs 10,000+ calibrations annually from the Vatva GIDC laboratory, serving 5000+ industries across Gujarat.
Prism Calibration Centre — Vatva GIDC, Ahmedabad
Prism Calibration Centre
F-101, Rudraksh Complex 2, Phase 3, GIDC Vatva, Near Jasoda Nagar Cross Road, Ahmedabad — 382445, Gujarat, India
Phone: +91 98245 26444
Email: info@prismcalibration.com
NABL: CC-2480 · ISO/IEC 17025:2017
Hours: Mon–Sat, 9:00 AM – 7:00 PM