State primary gas flow standard-ДЕТУ 03-01-15


Accuracy:

The standard provides reproduction of measurement units with a standard deviation of the measurement result for 40 independent observations which does not exceed:

  • gas volume - 0.025%;
  • flow rate - 0.025%.

Unrecovered systematic error does not exceed:

  • gas volume - 0.04%;
  • flow rate - 0.045%.

Uncertainty of measurement

gas volume:

  • by type A - 0.025%,
  • by type B - 0.023%,
  • total standard uncertainty - 0.035%;
  • extended uncertainty - 0.07% (with coverage ratio K = 2 and confidence level P = 0.95).

flow rate:

  •  volume flow rate of gas by type A - 0.025%,
  • by type B - 0.026%,
  • total standard uncertainty - 0.036%;
  • extended uncertainty - 0.072% (with coverage ratio K = 2 and confidence level P = 0.95).

Flow range (m3/h):

1.0 - 250.0

Means that can be calibrated on the standard:

critical flow nozzles, reference gas meters

Connecting dimensions (DN, mm):

25, 32, 50, 80, 100, 150

Scientific keeper of the standard:

Denys Serediuk, Ph.D.