ГЭТ 88-2014 (НИЛ 2201)
Standard name:
- ГЭТ 88-2014 State primary special standard of the unit of electric current in the frequency range (20 - 1·10^6) Hz
Type of measurement:
- Measurements of electrical and magnetic quantities
Structural division: name НИО\НИЛ:
- Research Laboratory of State Primary Standards in the Field of Measurements of Electrical Circuit Modes
Guardian Scientist:
- Shevtsov Vladimir Ivanovich, Candidate of Technical Sciences, Associate Professor
Year of creation:
- 1975
Year of re-confirmation:
- 2015
Operating principle:
The standard's operation is based on the method of comparing the root-mean-square value of alternating current with the value of direct current at different times.
Composition of the standard:
- Reference AC Current Thermocouple Sets for Current Ranges from 1 10-3 to 0.1 A and Frequency Ranges from 20 to 1 106 Hz;
- Reference AC Current Thermocouple Sets for Current Ranges from 0.3 to 20 A and Frequency Ranges from 40 to 2 104 Hz;
- Fluke A40B AC Current Shunt Set for Frequency Ranges from 20 Hz to 100 kHz and Current Ranges from 1 mA to 100 A;
- Highly Stable AC/DC Current Source;
- AC to AC converter with a frequency range from 1 to 1000 kHz;
- Clarke Hess 8100 voltage-controlled current amplifier;
- 34420A nanovoltmeter/microohmmeter;
- 792A precision AC voltage converters;
- Electrical resistance meters;
- Air parameter meter for monitoring environmental parameters.
Main metrological characteristics
| Name | Value |
|---|---|
| Estimated Unexcluded Systematic Reproduction Error | (3 x 10-6 - 5 x 10-5) relative units at a current of (1 x 10-3 – 0.1) A in the frequency range of (20 - 1 x 106) Hz (5 x 10-5 - 1 x 10-4) relative units at current (0.1 – 100) A in the frequency range (40 - 1 105) Hz |
| Estimation of random error of unit reproduction | (1 10-6 - 2 10-5) rel. units at current (1 10-3 – 0.1) A in the frequency range (20 - 1 106) Hz (2 10-5 - 5 10-5) rel. units at current (0.1 – 100) A in the frequency range (40 - 1 105) Hz |
| Type A standard uncertainty | (1 10-6 - 2 10-5) rel. units at current (1 10-3 – 0.1) A in the frequency range (20 - 1 106) Hz (2 10-5 - 5 10-5) rel. units at a current strength of (0.1 – 100) A in the frequency range of (40 - 1 105) Hz |
| Type B standard uncertainty | (1.7 x 10-6 - 3 x 10-5) rel. units at a current of (1 x 10-3– 0.1) A in the frequency range of (20 - 1 x 106) Hz (3 x 10-5 - 6 x 10-5) rel. units at current (0.1 – 100) A in the frequency range (40 - 1 105) Hz |
| Total standard uncertainty | (2 10-6 – 3.6 10-5) rel. units at current (1 10-3 – 0.1) A in the frequency range (20 - 1 106) Hz (3.6 10-5 – 7.8 10-5) rel. units at current (0.1 – 100) A in the frequency range (40 - 1 105) Hz |
| Expanded uncertainty with coverage factor k=2 | (4 10-6 – 7.2 10-5) rel. units at current (1 10-3 – 0.1) A in the frequency range (20 - 1 106) Hz (7.2 10-5 – 1.6 10-4) rel. units at a current strength of (0.1 – 100) A in the frequency range of (40 - 1 105) Hz |
Verification diagram:
- Heads the state verification scheme for measuring instruments of alternating electric current from 1 x 10^-8 to 100 A in the frequency range from 1 x 10^-1 to 1 x 10^6 Hz
Scope of application:
- Electric Power and Energy-Saving Technologies;
- Instrument and Precision Engineering;
- Electronic, Space, and Defense Technologies;
- Construction;
- Metallurgy;
- Medicine;
- Food Industry.
Results of applying the standard:
Metrological support for AC current measurements:
- 2 secondary standards;
- approximately 300 first-class working standards;
- over 1,000 second-class working standards.
The total number of measuring instruments traceable to ГЭТ 88-2014:
According to expert estimates, there are more than 10 million units - calibrators, multimeters, current converters, AC shunts, panel ammeters, etc.
Ensuring the uniformity of measurements, participation in the CIPM MRA program:
Comparisons: CCEM-K12. CMC string: COOMET-EM-RU-00000KYA-1.
PHOTO:
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General appearance of the standard ГЭТ 88-2014