Graph 2 lukewarm press compensation intelligence flow to accumulate block diagram of principle calculating appearance

4 Use circumstance

① general situation The civil air to solve a wide place in the road is metric problem (day air feed estimates range of lesser, flow fluctuation bigger) , arrive from August 1997 now, the intelligence that our altogether used Zhejiang day to believe instrument limited company to produce come back into vortical flowmeter more than 50, the discharge of use dot measures limits to all be in 100~3000m³/ between D, air feed presses force ≤1.0MPa, among them the smallest norms is DN25; The biggest norms is DN50.

② medium condition The medium that be measured basically is the natural gas after purifying, its firedamp (CH₄) content ≥95 ％ , carbon dioxide (CO₂) reach nitrogen (N₂) content all hydrogen of ≤5 ％ , vulcanization (H₂S) content ≤30mg/m³, opposite density (Cr) for 0.55~0.58.

③ uses the effect As long as appearance type selecting is reasonable and fall in stability drifting voice and the condition that did not violate apparently, this watch moves relatively stable, reliable. In some metric dot, be opposite via be being compared with series connection of orifice plate flowmeter, it is better that both measures result be identical, if express,1 is shown.