Rosemount electromagnetic flow meters show false flow readings; how to handle this?
Thread Content
After closing the inlet valve, an Rosemount 8705 electromagnetic flowmeter still indicated an instantaneous flow rate of 1400–1500 L/H (with a range of 0–1500 L/H). When the inlet valve was opened, the instantaneous flow rate gradually increased from 100. The flow meter is grounded; the other 3 units of model 8705 at the same location do not have this issue. My colleague said that this problem can be resolved by changing a parameter in the settings, and I would like to know which parameter should be changed. The converter used is model 8732
Use the hand controller to adjust the damping. If it doesn’t work, just buy a new one.
It shows 1500 L/h; this is not the full range – the tube isn’t filled to capacity, right?
Are there any alarm messages? Is it dissatisfaction with the fault status remaining?
Disable the empty pipe alarm by finding the corresponding parameters.
Try going to Diagnostics — Variables — Empty Pipe Detection and turning it off