WHAT IS A FTI TURBINE FLOW METER AND WHY CALIBRATE IT?

A Flow Technology (FTI) turbine flow meter measure the flow of liquids and gases, usually through pipes. FTI turbine flow meters measure flow on a volumetric basis and are known to be extremely accurate. In order to ensure a turbine flow meter lives up to its accurate reputation, frequent calibration of the device is necessary.

HOW A TURBINE FLOW METER WORKS

A turbine flow meter consists of a multi-bladed rotor and bearing assembly, which is mounted to a support device. This assembly is then mounted inside a housing unit that has a known internal diameter. As fluid runs through the housing unit, the rotor spins at a proportional rate. This rate is consistent with the volume of liquid passing through the housing unit. To detect the passage of each rotor blade, a magnetic carrier pick-off sensor is used. This sensor also helps to generate the frequency output. Once the frequency output is generated, it can be read directly with the end users electronics or it can be further processed to convert it to an analog output.

WHY CALIBRATE A TURBINE FLOW METER?

Comparable to many other measuring devices, turbine flow meter calibration can and will drift. Here are some common reasons flow meters drift and when they should be calibrated:

At what point do you need to change your calibration intervals?
Read our guide to find out.