Turbine Meters Vs PD meters
Turbine Meters Vs PD meters
(OP)
we used Smith Turbine meters for loading of Tank Truck. the product is Diesel. the piping network is such that one pump feeds multiple loading arms. we observe variation of about 60- 100 litres on filling of 24000 litres. will any one tell us solution for this. either meter are required to be replaced or the any thing else.





RE: Turbine Meters Vs PD meters
-Taylor
RE: Turbine Meters Vs PD meters
You may have a ramp down function for the end of batch rather than a simple stage closure of the shut off valve.
In either case if the flow conditions vary due to the load on the pump then many of the end of batch sequence settings may be affected. It all depends on how sophisticated or otherwise your batch controller is.
For example, the final close signal may be set to initiate as the batch reaches the end point or at a pre-set value before the end point to allow for a finite close time with a finite amount of fluid flowing during this final stage. Flow rate changes may affect this even if they are within the accurate range for the meter.
JMW
www.ViscoAnalyser.com
RE: Turbine Meters Vs PD meters
To do better you would have to go to a device with lower uncertainty. Maybe a truck scale?
David
RE: Turbine Meters Vs PD meters
I interpreted you to mean that your meter readings varied by this amount i.e. batch set 24000 litres against batch delivered 23900-24100; in other words undershoot or overshoot errors in the batch control.
Many batch controllers have sophisticated shift down sequence control that compensates for closure time, was the point I was making, and variable f;low rates due to other demands on the pump will affect these settings.
JMW
www.ViscoAnalyser.com