Federal Agency
in Technical Regulation and Metrology
FSUE «VNIIFTRI»
Major divisions » Division of physicotechnical measurements №15 » Prospects for the development of hygrometry in the East-Siberian branch »

Prospects for the development of hygrometry in the East-Siberian branch

  • Improvement of the National primary standard of gas humidity GET 151:

– reproduction of three highly sought units of gas humidity: relative humidity, molar (volume) part of moisture, dew/frost-point temperature;

– broadening of measurement range of GET 151;

– broadening of operating ranges of temperature up to+ 90 0С;

– control automation of operating process, information collection and processing of GET 151;

– development of  standard generator of low dew/frost-point temperatures;

– broadening of operating ranges of temperature up to -70 0С (- 90 0С);

– mutual comparison  of standard generators of GET 151;

– productivity boosting of calibration works by three times.

Modern and perspective characteristics of the National primary standard of  gas humidity  GET 151

Value

Year

Range

Residual bias

Relative humidity  j , %

2008

5 ÷ 98

0,1 ÷  0,2

2010

5 ÷ 98

0,02 ÷ 0,2

Molar part of moisture Xn , mln-1

2008

0,6 ÷ 700000

0,13 ÷ 1,4

2010

0,01÷ 700000

0,13 ÷ 1,5

Dew/frost point temperature         Td , °C

2008

-80 ÷ +90

0,04 ÷ 0,08

2010

-100÷ +90

0,04 ÷ 0,10

  • Development of generators and investigation of moist gas  properties at high-pressure
  • Development of moist-gas generators for trace concentration
  • Formulation of GSSD in order to measurement assurance of moist process gas qualities