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State Primary Standard of the Unit of Harmonic Coefficient

Reproduction and maintenance of total harmonic distortion unit.

Transferring of total harmonic distortion unit to the secondary standard and working standards by means of the method of direct measurements and to the working measuring instruments by means of the method of direct comparison in accordance with DSTU 3391-96 (GOST 8.110-97) ”Metrology. National verification scheme for measuring instruments of total harmonic distortion”.

Metrological characteristics
Range	0,01 kHz	0,02 kHz	0,2 kHz; 2 kHz; 20 kHz	100 kHz	200 kHz
Uncertainty by type А (u_A)	0,0003·К_Г	0,0003·К_Г	0,0003·К_Г	0,0003·К_Г	0,0003·К_Г
Uncertainty by type В (u_B)	0,0016+0,0052·К_Г	0,0005+0,0026·К_Г	0,0002+0,0016·К_Г	0,0005+0,0031·К_Г	0,0016+0,0031·К_Г
Total standard uncertainty (u_C)	0,0016+0,0052·К_Г	0,0005+0,0026·К_Г	0,0002+0,0016·К_Г	0,0005+0,0031·К_Г	0,0016+0,0031·К_Г
Extended uncertainty (U)	0,0031+0,011·К_Г	0,0010+0,0052·К_Г	0,0003+0,0031·К_Г	0,0010+0,0063·К_Г	0,0031+0,0063·К_Г