ГЭТ 14-2014 (НИЛ 2202)
Standard name:
- ГЭТ 14-2014 State Primary Standard of the Unit of Electrical Resistance
Type of measurement:
- Measurements of electrical and magnetic quantities
Structural division: name НИО\НИЛ:
- Research Laboratory of State Standards in the Field of Measurement of Electrical Circuit Parameters
Guardian Scientist:
- Ploshinsky Alexander Vladimirovich, Ph.D.
Year of creation:
- 1970
Year of re-confirmation:
- 2015
Operating principle:
The State Primary Standard of the Unit of Electrical Resistance reproduces the unit of electrical resistance based on the values of physical constants – the electric charge of an electron (e) and Planck's constant (h), in accordance with their definition in the SI system, through the implementation of the integer quantum Hall effect in a one-dimensional electron gas in a strong magnetic field (7.5 T) at cryogenic temperature (1.5 K).
Composition of the standard:
- Cryomagnetic unit Measurements International Ltd. 6800A, including a superconducting magnet and vacuum path;
- Digital automatic resistance bridge comparator Measurements International Ltd. 6010Q;
- Magnicon Gmbh Cryogenic Comparator Bridge CCC 2010-01;
- Transitional Electrical Resistance Standards in the Nominal Value Range from 1 Ohm to 1 Mohm;
- Groups of 4 electrical resistance standards, each with nominal values of 1 Ohm, 100 Ohm, 1 kOhm, 10 kOhm, and 12.9 kOhm.
- Guidline and M-301 Liquid Thermostats;
- Agilent 34401A, 34410A Multimeters and KTSP-25 and PTS-10 Contact Platinum Thermometers.
Main metrological characteristics
| Characteristic Name | Value |
|---|---|
| Nominal values of electrical resistance at which the unit is reproduced | 12906 kOhm 6.453 kOhm |
| Nominal values of electrical resistance stored in groups of measures | 1 Ohm, 100 Ohm, 1 kOhm, 10 kOhm, 12.9 kOhm |
| Unit transmission range from the GPE | From 0.1 Ohm to 1 MOhm |
| The unit reproduction with the mean relative square deviation of the measurement result So in thirty (n=30) independent measurements does not exceed | 6·10-9 |
| The unexcluded relative systematic error Θo does not exceed | 24 x 10-9 |
| The standard uncertainty assessed according to Type A, uAo, does not exceed | 6 x 10-9 |
| The standard uncertainty assessed according to Type B, uBo, does not exceed | 10 x 10-9 |
| Total standard uncertainty | 12 x 10-9 |
| Expanded uncertainty (at k = 2) | 24 x 10-9 |
| Instability of νо storage of a unit by group standards over a year | (30 x - 80) 10-9 |
Verification diagram:
- Heads the State Verification Scheme for Instruments Measuring Electrical Resistance of Direct and Alternating Current
Scope of application:
Aerospace industry; defense industry; shipbuilding; electric power; nuclear power; mechanical engineering; electronics industry
Results of applying the standard:
S Primary S the unit of electrical resistance is one of the basic standards in the SI system, transferring the unit not only to secondary and working standards of electrical resistance in accordance with the verification scheme, but also defining a whole range of units both in the field of electromagnetism (for example: electrical capacitance, inductance, power, current, magnetic induction), and units of other physical nature (for example, temperature).
The transfer of the unit of electrical resistance is carried out from the State Primary Standard through the State Secondary Standards in the range:
- 1 μΩ to 10 pOΩ (DC);
- 1 mΩ to 100 MΩ (AC, frequency range from 50 Hz to 10 MHz);
- 1 μΩ to 1000 Ω (reference shunts)
The total number of measuring instruments traceable to ГЭТ 14-2014:
Over a million
Ensuring the uniformity of measurements, participation in the CIPM MRA program:
33
- CCEM-K1 (1990 - 1991); Comparison of resistance standards. Resistance: 1 ohm and 10 kiloohms; participants: BIPM; A.S.M.W.; BNM-LCIE; CSIRO-NML; IEN; JV; METAS; MIKES/VTT; NIM; NIST; NMIJ AIST; NMi-VSL; NPL; NRC; PTB; SP; VNIIM,
- Tripartite comparisons 1999; KRISS (Korea), NIM (China), VNIIM,
- CCEM-K2 (1996 - 2000); Comparison of resistance standards Resistance: 10 megaohms and 1 gigaohm, Voltage: 10 V, 50 V, 91 V or 100 V; participants: NIST; BNM-LCIE; CSIR-NML; CSIRO-NML; IEN; KRISS; METAS; MSL; NIM; NMi-VSL; NPL; NRC; PTB; SP; VNIIM
- CCEM-K2.2012 (2012 - 2015); Comparison of resistance standards Resistance 10 MΩ and 1 GΩ, Voltage: 10 V to 100 V; participants: NRC; CENAM; INTI; METAS; NIM; NIST; NMISA; NPL; PTB; VNIIM; VSL
- EUROMET. EM-K2 (2005 - 2007); Comparison of resistance standards. Resistance: 10 megaohms and 1 gigaohm; participants: METAS; BEV; CEM; CMI; INETI; INM; JV; LNE; LNMC; MIKES; MIRS/SIQ; NML(IE); NPL; OMH; PTB; SMD; SMU; UME; VMT/PFI; VNIIM; VSL
- EUROMET.EM-K10 (2003 - 2005); Comparison of resistance standards. Resistance: 100 ohms; participants: PTB; MIKES; SP; JV; DFM; VNIIM; OHM; SASM; GUM; VMT; LNMC; EIM; INRIM; CEM; INETI; METAS; SIQ; DMDM; NPL; NML; LNE; BIPM; SMD; CMI; UME; NMISA; NMI; BEV
- APMP.EM-K2 (2010 - 2011); Comparison of resistance standards. Resistance: 10 megaohms and 1 gigaohm; members: KRISS; CMS; MSL; NIM; NIMT; NMC, A*STAR; NMIA; NMIJ AIST; NMISA; NML-SIRIM; SCL; VNIIM
- COOMET. EM-S19 (COOMET 624/GE-a/13); (2015 - 2017); Comparison of electric resistance standards. DC electric resistance, 100 ohm and 100kohm; participants: GEOSTM; AZSTAND; BelGIM; FTMC; IMBIH; INIMET; KazStandard; MASM; NMI (MD); VNIIM
Unique technical installations as part of the standard:
None
PHOTO:
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