Panametrics Flow Computer

alexFSC · Apr 19, 2011

Hello everyboby, I have a GE GF-868 Panametrics flow computer and with no flow going to the pipe I am getting a Velocity reading in the Flow Computer.

What can make that happen ?

danw · Apr 19, 2011

Ultrasonic in general, not GE specific:

1) Zero is not zero, therefore an offset looks like a flow.

2) The pump isn't on and you think there is no flow, but there really is a flow, pressure or thermal siphon, leakage, somewhere there's a differential pressure created that creates flow. The pump not being on is not the same as a block valve being closed.

Ultrasonic transit time is VERY sensitive and good at low flow, so it can pick up flow in the pump off state.

alexFSC · Apr 20, 2011

I am having a flow rate of 198.1 KFCF/Day on a 16" pipe I would thing we sure hear that much flow going thrugh the meter/pipe.

widelto · Apr 20, 2011

Is your flowmeter located in such a way that the flow is going upward ?. This is mandatory for my flowmeters. Look attached file.

alexFSC · Apr 20, 2011

The Gas Meter is horizontal with about 25 ft on each side of the probes. Now at about 25 ft from the meter on one side i have an elbow going down( that is where the flow is comming from), and on the other side of the meter run at about 25 ft I have an elbow going up(that is where the flow is going to).

Mickey · Apr 20, 2011

I don't have a upstream valve or downstream valve to shut off, and i do have a stable Temp

I worked in the natural gas business for 34 years. It seems very unusual
you don't have block valves for your meter run.

alexFSC · Apr 20, 2011

No. the meter is on a Flare and before the Flare is a scrubber Vessel

danw · Apr 20, 2011

KFCF is ?

1,000 ___ ____ _____ ?

Panametrics Flow Computer

alexFSC

Member

danw

Lifetime Supporting Member

alexFSC

Member

widelto

Member

alexFSC

Member

Mickey

Lifetime Supporting Member

alexFSC

Member

danw

Lifetime Supporting Member

Similar Topics