Electrical Metrology Division

Introduction

ElecElectrical Metrology Division of National Physical & Standards Laboratory (NPSL) is mandated to disseminate and maintain National Standards for DC Voltage & Resistance, Current, Inductance Capacitance and Power. In addition to this Laboratory Quality management System (LQMS) is being practiced to remain in accordance and fulfill requirements of ISO 17025

Functions of EMD

• Realizing the primary standards and maintaining the national / reference standards in the field of electrical measurements>
• Maintaining the traceability of electrical standards through ILCs and bilateral arrangements with NMIs of other countries
• To improve and develop measurement techniques for Test / calibration in the field of electrical metrology
• To provide test and calibration services to public / private industrial sector, especially to the defence organizations of the country
• To carry out testing & standardization of electrical home appliances like PVC cables, electronics blasts and vinyl tiles
• To provide training, consultancy and advisory services to different public and private departments / organizations of the country in the field of electrical metrology
• Conducting specific R & D work to develop and improve the in use calibration techniques and supporting instrumentation in the field of electrical metrology
• Realizing and establishment of primary standards of voltage through Josephson Voltage Standard (JVS) system for 1 Volt and 10 Volt.

Future Goals / Targets / Plans

• • To establish facilities for on-site calibration to the customers in the field of electrical metrology
• • To enhance the electrical measurement capabilities and facilities regarding range & Accuracy for:
  AC/DC Voltage. Up to 50 kV
  AC/DC Current. Up to 100 A
• Improvement in existing measurement techniques including uncertainty budget in the field of electrical measurement
• Visit to concerned local industries to find out their problems related to trade and to extend expertise to them.
• In-house training of the metrologists on calibration techniques in electrical measurements under provision of BMR Project
• To enhance the range and accuracy of the parameters in the accredited scope related with Electrical Metrology
• Participation in national / international ILC and key comparison in electrical parameters arranged by concerned metrology bodies and NMIs
• Training of the metrologists on improved calibration techniques in electrical measurements from NMIs of the Asia Pacific Region and the developed countries
• Interaction with other NMI’s and metrology institutes regarding expert visits and the latest calibration techniques

PNAC Accredited Calibration Facilities

Parameter	Range	Uncertainty
DC Voltage	0 ---1200 V	±3 x 10 -4
AC Voltage	0 – 1050 Volts (10 HZ – 1.5 MHz)	± 0.01 %
DC Current	0 – 20 Amps 20 -1000 Amps (with Coils)	± 0.14 % ± 0.015%
AC Current	0 – 20 Amps (10 Hz –30KHz) 20 -1000 A (with Coils)	± 0.05 % ± 0.07 %
Resistance	0 Ω – 100 KΩ 100 kΩ– 1MΩ 1 MΩ–400MΩ	± 1 PPM– -8PPM ± 16PPM ± 0.02%
Inductance	1 µH – 100 H	± 0.03 %
Power (DC / AC)	1 mW – 20 KW	± 0.03 % (DC)

Equipment

Contact Personnel

Head Electrical Metrology Division
Phone: +92 51 9257462-7, Ext. 228, 241
Fax: +92 519258162