Technical Information - WEBTEC GF Serie Manual Del Usuario

Technical information

All flow meters are calibrated at 21 cSt as standard. Special calibration is available over a custom flow range or at a
different viscosity, please contact sales to discuss your application.
Fluid viscosity
The performance of the flow meter can be affected by the viscosity of the fluid in use. Our gear flow meters are
calibrated at between 19 and 23 cSt as standard (a mean viscosity of 21 cSt), which is the typical kinematic viscosity for
a hydraulic fluid operating at 50 °C. The kinematic viscosity of all hydraulic fluids is related to the fluid temperature and
the table below shows the effect of temperature on the kinematic viscosity of a range of typical grades of hydraulic oil.
The shaded area of the table shows the range of viscosities that can be measured by a flow meter with standard
calibration with minimal effect on the accuracy (less than ± 0.5% FS). The meters will work with less leakage at higher
viscosities and are capable of running up to 10,000cSt, pressure drop permitting.
Flow meters can be specially calibrated at a different viscosity to the standard or we can advise on the expected error
when the flow meter is used at other viscosities, please contact sales for further information.
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