Orifice Meter - Causes of Bias
Orifice Meter - Causes of Bias
(OP)
I've got AGA3 in front of me and a bunch of other reference material but the answer I need is not jumping out at me. Could anyone out there give me the Readers Digest version of what factors contribute to bias errors as opposed to random +/- errors. Are there particular items that will consistently make the flow measurement higher than actual? The installations specifically are field gas gathering orifice meters.
Thanks in advance.
Thanks in advance.





RE: Orifice Meter - Causes of Bias
- backwards plate
- plugged sensing lines
- swirl in the flow
- bowed plate
I've attached a cartoon I use in my Primary Element talk to illustrate that the things we check in a calibration are just the tip of the iceberg.
David
RE: Orifice Meter - Causes of Bias