摘要 |
A gas turbine meter (20) includes a measuring cartridge (36) which has a measuring ro-tor (38) that rotates in one direction at a speed approximately proportional to the velocity of gas flowing through the meter (20) and a reference rotor mounted downstream of the measuring rotor (38) which rotates in the opposite direction from the measuring rotor. An inlet flow straightener (28) upstream of the measur-ing rotor causes gas to flow substantially axially within the meter, and a reference flow straight-ener mounted between the measuring rotor and the reference rotor also causes gas to flow substantially axially within the meter. A signal pro-cessor provides an indication of the accuracy of the gas turbine meter based on the quotient of a measuring signal, which is proportional to the speed of rotation of the measuring rotor, divided by a reference signal, which is proportional to the speed of rotation of the reference rotor.
|