LF & HF Voltage, Current & Microwave Standards

The activity maintains one of the world's most comprehensive national capabilities for measuring electromagnetic quantities across the spectrum using established National Standards for  Low Frequency AC Voltage & Current, Microwave Power, Attenuation & Impedance  Standards along with the associated calibration facilities.
We regularly participate in BIPM and APMP key/Supplementary comparisons to establish mutual degree of equivalence with the corresponding standards of the leading NMIs and to ensure internationally recognised traceability of measurements. The CMCs registered in appendix C of BIPM-MRA has been reviewed in 2012.  

Parameters

LF Voltage

Establishing traceability and providing apex level calibration services from 1 mV to 1000 V in the frequency range of 10 Hz to 1 MHz with uncertainty from ± 10 ppm to ± 1000 ppm

LF Current

Providing traceability along with calibration services from 1 mA to 10 A in the frequency range of 40 Hz to 10 kHz and 20 A upto 5 kHz with uncertainty from ± 20 ppm to ± 100 ppm.

HF Voltage

Traceability of high frequency thermal voltage converters against the primary standard of HF voltage based on calorimetric principle has been established in the voltage range from 1 mV to 50 Volt upto 1000 MHz with ±1.2 % uncertainty.

Microwave Power

Providing apex level calibration services and dissemination of standards for maintaining the traceability in power measurements upto 10 mW in the frequency range of 1 MHz to 18 GHz with uncertainty upto ± 1.5 %.

Microwave Attenuation

Establishing traceability in attenuation using 30 MHz WBCO attenuator and providing apex level calibration services from 0.05 dB to 60 dB at 30MHz, 1GHz to 18 GHz with uncertainty of ±0.02 dB/10 dB.

Microwave Impedance

Providing apex level calibration services and dissemination of standards for maintaining the traceability in impedance(reflection coefficient/VSWR) measurements in the frequency range 2 GHz to 18 GHz, in coaxial with uncertainty of ±0.02 in VSWR and in the frequency range 5.8 GHz to 18 GHz in waveguide with uncertainty of ±0.002 to 0.004 in reflection coefficient magnitude.

Key Comparisons

People:

Scientists:

Mr. P.S. Negi
Mr. Saood Ahmad
Dr. S.K. Dubey

Technical :

Mr. Bijendra Pal
Mrs. Archana Sahu
Mrs. Sunidhi Luthra

Contact Person:
Mr. P. S. Negi
Email ID: psnegi@nplindia.org

CONTACT INFORMATION