Measuring standards

№	NAME OF STANDARDS	MEASUREMENT RANGE	ERROR
1.	National reference standard of unit of length	0.1 to 100 mm	± (0.02÷0.03) μm
2.	National reference standard for unit of mass	from 1 mg to 20 kg	± (0.03÷1) mg
3.	National reference standard for units of time and frequency	“5 MHz; 100 MHz; 1 Hz; 5 MHz and 100 MHz, (1 ± 0.2) V”	± 1∙10-12
4.	National reference standard for the unit of electrical capacity	“from 1000 to 100000 pF”	“from 2.0∙10-2 to 2.0∙10-1%”
5.	National reference standard for the unit of inductance	0.1 μH to 1.0 H	± (0.2÷0.5)%
6.	National reference standard of pressure unit	0.02 to 60 MPa (0.2 to 600 bar)	5∙10-4
7.	National reference standard for AC voltage unit	0.1÷300 V	± 5∙10-4%
8.	National reference standard for unit of flow and quantity of liquid	from 0.02 to 200 m3/h	0.3%
9.	National reference standard for units of mass fraction of ammonia, hydrocyanic acid, nitrogen dioxide, sulfur dioxide and chlorine in air	0.5 to 20 mg/m3, 2 to 20 mg/m3, 1 to 10 mg/m3, 1 to 100 mg/m3, 0.15 to 1.50 mg/m3	“± 8%, ± 5%”
10.	National reference standard for spectral directional transmittance and optical density	“from 185 to 3300 nm, from -6 to 6 Abs”	± 0.003 Abs
11.	National standard of units of kerma in air, exposure dose and their rates of X-ray and gamma radiation	“from 7 ∙ 10–9 to 3 ∙ 106 Gy from 7 ∙ 10–10 to 45 Gy/s from 33 to 1250 keV”	± 0.5%
12.	National reference standard for temperature unit-Kelvin	“from minus 38.8344 °С to 961.78 °С”	(0.0002 ÷ 0.01) °С
13.	Standard unit of absolute pressure	1 10-8-4 105 Pa	0.310-2 – 0.3 Pa
14.	Platinum resistance thermometers for reference purposes	0-630.74 °C	0.01 °C
15.	Standard unit of pressure	0.007 – 7 MPa	3 10-4 MPa
16.	An exemplary force measuring unit	20 – 1000 kN	0.02%
17.	Comparator for checking and calibrating gage blocks	up to 100 mm	1st rank
18.	Sample for photometric measurements	175 — 3300 nm	±0,0003 А