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Institutul National de Metrologie
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ELECTRICAL MEASUREMENTS LABORATORY

INM LABORATORIES

General Information • The Management Team
Organizational Chart

 

 

Goals:

  • [image]development and maintenance of the national references - national and reference measurement standards of Romania - for the units of the following quantities: DC voltage, DC resistance, DC current, impedance (AC resistance, capacitance, inductance), AC voltage, AC current, AC power and energy, AC high voltage, AC voltage ratio, AC current ratio
  • dissemination of the units, at the required accuracy level, through calibration services, whose results are traceable to the SI.
  • development of measuring techniques and procedures, including uncertainty analysis methods, participation in international, regional and bilateral comparisons
  • [image]consultancy and training on issues related to the measurement theory and practice
  • pattern evaluations and metrological verifications

 

The Electrical Measurements Laboratory includes the following groups:

 

Contact persons:

Head of laboratory, Gelu Popovici, tel. 334 48 30 ext. 153, 174, e-mail: gelu.popovici@inm.ro
Deputy head of laboratory, head of Direct Current Group, Quality Assurance Manager, Livia Dragomir, ext. 153, 174, e-mail: livia.dragomir@inm.ro
Head of Alternative Current Laboratory, Liviu Doru Popescu, ext. 140, 177, e-mail: liviu.popescu@inm.ro
Head of Parametric Quantities Group, Anca Elena Nestor, ext. 170, e-mail: anca.nestor@inm.ro
Head of High Voltage Group, Florin Mirea, ext. 198, 104, e-mail: florin.mirea@inm.ro

 

IMPORTANT: The calibrations are performed by the Electrical Measurements laboratory according to the requirements of SR EN ISO 17025/2005. The Quality Management System implemented in the laboratory is accepted within the EURAMET.

 

The laboratory is DKD accredited for the following quantities:

Quantity Item Calibration range Measurement uncertainty
(k=2)
DC Voltage Digital multimeter 0,1 mV ÷ 1000 V 4´10-6 ¸ 12´10-6
Calibrator 0,1 mV ¸ 1000 V 4´10-6 ¸ 10´10-6
DC Current Digital multimeter 100 µA ÷ 10 A 50´10-6¸ 0,5´10-3
Calibrator 100 µA ÷ 10 A 20´10-6 ¸ 0,12´10-3
DC Resistance Standard resistor 1 mΩ ÷ 100 TΩ 5´10-6 ¸ 30´10-3
Digital multimeter 100 mΩ÷ 100 MΩ 6´10-6 ¸ 130´10-6
Calibrator 1 Ω÷ 100 MΩ 6´10-6 ¸ 200´10-6
AC Voltage Digital multimeter 20 mV ÷ 750 V
f = 10 Hz…300 kHz		 60´10-6 ¸ 2,4´10-3
Calibrator 20 mV ¸ 20 V
f = 10 Hz…300 kHz
200V ¸ 750 V
f = 40 Hz…100 kHz		 60´10-6 ¸ 1,8´10-3 80´10-6 ¸ 2,7´10-3
AC Current Digital multimeter 10 mA ÷ 1 A
f = 10 Hz…10 kHz
10 A
f = 40 Hz…1 kHz		 210´10-6¸ 7´10-3  9´10-3
Calibrator 10 mA ÷ 1 A
f = 10 Hz…5 kHz		 240´10-6¸ 0,6´10-3
Capacitance
1 kHz  		 Standard capacitor 10 pF … 10 nF (8…10)  x10-6
C - meter 10 pF … 100 µF 10 x 10-6
Inductance
1 kHz		 Standard inductor 20 µH … 1 H (5 … 10) x 10-6
Digital RLC-meter 10 µH … 10 H *) 1,2 x 10-4
AC Resistance
f=1 kHz		 Digital RLC-meter 0.01 Ω … 10 kΩ *) 1,0 x 10-4

*) calibration in discrete points

The DKD-accredited field can be found at the address: http://www.dkd.info/english/deutsch/pdf/39701.pdf

 

The Electrical Measurements Laboratory maintains and uses six national standards as well as a large number of reference measurement standards.

 

National standards:

No. Quantity Components SI traceability route
1 DC Voltage Group of 4 Zener Diode standards 1.018V and 10 V BIPM
2 DC Resistance Group of 8 standard resistors 1Ω
Group of 4 standard resistors 10 kΩ		 BIPM
3 AC Voltage Single-junction thermal converters of  1V, 2V NMIs, members of EURAMET
4 Capacitance Group of three 10 pF fused silica standard capacitors BIPM
5 Inductance Group of two 10mH standard inductors NMIs, members of EURAMET
6 AC Voltage ratio up to 110 V Single decade inductive voltage divider NMIs, members of EURAMET

 

Reference measurement standards:

No. Quantity Components SI traceability route
1 DC Voltage Zener Diode standards
1.018V and 10 V		 BIPM
2 DC Resistance Groups of standard resistors
0,1 mΩ ÷ 100 TΩ		 BIPM and NMIs, members of EURAMET
3 DC Voltage
DC Current
AC Voltage
AC Current		 Multifunction calibrator NMIs, members of EURAMET
4 AC Power and energy
single and three phase
sinus
f = 50 Hz		 Digital comparator
50 V…480 V
10 mA…120 A
φ = φº…360º		 NMIs, members of EURAMET
5 AC Power and energy
single and three phase
non – sinus
f = 50 Hz		 Electrical power standard
1 V…1008 V
10 mA…80 A
φ = + 90º
f0 = 16 Hz … 850 Hz
nmax=100		 UKAS accredited laboratory
6 AC Resistance Group of standard resistors
1 kΩ and 10 kΩ		 NMIs, members of EURAMET
7 Capacitance Groups of standard capacitors
100 pF, 1 nF and 10 nF		 NMIs, members of EURAMET
8 Digital capacitance bridge
1 pF ÷ 10 μF
50 Hz ÷ 20 kHz		 NMIs, members of EURAMET
9 Inductance Groups of standard inductors
1 mH ÷ 1 H		 NMIs, members of EURAMET
10 Current transformers
 f=50 Hz		 Standard current transformer
Ip = 5 A ... 1 000 A*)
Is = 1 A, 2 A, 5 A *)		 NMIs, EURAMET members
11 Voltage and current
transformers
f=50 Hz		 Standard voltage and current transformer bridge NMIs, members of EURAMET

*) calibration in discrete points

 

DIRECT CURRENT GROUP

 

Services:

[image]a) calibration of:

  • direct current and voltage calibrators
  • digital multimeters
  • single-value standard resistors
  • resistance bridges
  • resistance boxes
  • standard cells
  • direct current potentiometers
  • resistive dividers
  • analogue instruments for the measurement of current, voltage and electrical power

 

b) metrological verification and pattern evaluation of:

  • [image]megohmeters
  • earth testers

 

c) high-accuracy measurements and technical assistance

 

For the full list of calibrations and charges, see the List of measuring means for which the Romanian Bureau of Legal Metrology performs calibrations, LE 2006.

 

Personnel, positions, contact details

Gelu Popovici, senior scientific researcher II, head of laboratory, tel. 334 48 30 ext. 153, e-mail: gelu.popovici@inm.ro
Livia Dragomir, Ph. D, senior scientific researcher III, head of group, tel. 334 48 30 ext. 153, e-mail: livia.dragomir@inm.ro
Liliana Cîrneanu, senior scientific researcher III, tel. 334 48 30 ext. 153, e-mail: liliana.cirneanu@inm.ro
Marciana Simionescu, senior scientific researcher III, tel. 334 48 30 ext. 153, e-mail: marciana.simionescu@inm.ro
Beatrice Ruşescu, technician, tel. 334 48 30 ext. 174
Viorica Oană, technician, tel. 334 48 30 ext. 174

 

ALTERNATING CURRENT GROUP

 

Services:

[image]a) calibration of:

  • AC current and voltage calibrators
  • AC current and voltage calibrators
  • digital multimeters
  • multifunction calibrators
  • single-junction thermal converters Un = 1 V; 2 V
  • wattmeters and single - and three - phase standards for active power and energy
  • Varmeters and single - and three-phase standards for reactive power and energy
  • digital phasemeters and power factor meters
  • [image]single- and three - phase testing equipment for electrical energy meters
  • equipment for the calibration of instrument transformers

 

b) metrological verification and pattern evaluation:

  • single- and three-phase meters for active electrical energy
  • single- and three-phase meters for reactive electrical energy

 

c) high-accuracy measurements and technical assistance

 

[image]d) other activities

  • initial or after-repair putting into service of single- and three-phase testing equipment for electrical energy meters
  • metrological evaluation of measuring chains in the automated control systems

 

For the full list of calibrations and charges, see the List of measuring means for which the Romanian Bureau of Legal Metrology performs calibrations, LE 2006.

 

Personnel, positions, contact details

Liviu Doru Popescu, senior scientific researcher III, head of group, tel. 334 48 30, ext.140, e-mail: liviu.popescu@inm.ro
Ioana-Izabela Odor, Ph.D, senior scientific researcher II, tel. 334 48 30, ext. 177, e-mail: ioana.odor@inm.ro
Sorin Niculescu, senior scientific researcher III, tel. 334 48 30, ext. 140, e-mail: sorin.niculescu@inm.ro
Elvira Buzac, senior scientific researcher III, tel. 334 48 30, ext. 140, e-mail : elvira.buzac@inm.ro
Dorin Flămînzeanu, senior scientific researcher III, tel. 334 48 30, ext. 177, e-mail: doru.flamanzeanu@inm.ro
Ileana Stuhlmüller, technician, tel. 334 48 30, ext. 140
Ioan Gliga, technician, tel. 334 48 30, ext. 140
Cornel Băltăţeanu, technician, tel. 334 48 30, ext. 177

 

PARAMETRIC QUANTITIES GROUP

 

Services:

a) calibration of:

  • single-value and decade standard capacitors
  • single-value and decade standard inductors
  • high-voltage standard capacitors
  • RLC meters
  • inductive voltage dividers
  • capacitance and loss factor (tan δ) bridges
  • current transformers and/or voltage transformers measuring instruments
  • power transformers measuring instruments
  • capacitive unbalance measurement instrument
  • measuring amplifiers for strain gauge measurements
  • synchro-resolver standards and angle position indicators

 

b) high-accuracy measurements and technical assistance

 

For the full list of calibrations and fees, see the List of measuring means for which the Romanian Bureau of Legal Metrology performs calibration, LE 2006.

 

Personnel, positions, contact details

Anca Nestor, Ph.D, senior scientific researcher III, head of group, tel. 334 48 30, ext. 170, e-mail: anca.nestor@inm.ro
Vasile Şerban, technician, tel. 334 48 30, ext. 170

 

HIGH VOLTAGE GROUP

 

Services:

a) calibration of:

  • kilovoltmeters
  • voltage transformers accuracy (0.1 to 0.5) %
  • current transformers accuracy (0.05 to 0.5) %

  b) metrological verification and pattern evaluation:

  • current transformers
  • voltage transformers

  c) high-accuracy measurements and technical assistance

 

For the full list of calibrations and fees, see the List of measuring means for which the Romanian Bureau Legal Metrology performs calibrations, LE 2006. 

Personnel, positions, contact details

Florin Mirea, engineer, tel. 334 48 30, ext. 104, e-mail: florin.mirea@inm.ro
Dragoş Alexandrescu, engineer IA, tel. 334 48 30, ext. 104
Gabriel Popp, technician, tel. 334 48 30, ext. 104
Sorin Voinea, technician, tel. 334 48 30, ext. 104

 

 

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