EF200W-C
5
Temperature measurement
The measuring device can also measure the temperature of the medium.
The temperature is measured via Pt 1000 temperature sensors. These are located in the paddle of
the DSC sensor and are therefore in the direct vicinity of the fluid.
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A0034068
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DSC sensor
Lifelong calibration
Experience has shown that recalibrated measuring devices demonstrate a very high degree of
stability compared to their original calibration: The recalibration values were all within the original
measuring accuracy specifications of the devices. This applies to the measured volume flow, the
device's primary measured variable.
Various tests and simulation have shown that once the radii of the edges on the bluff body are less
than 1 mm (0.04 in), the resulting effect does not have a negative impact on accuracy.
If the radii of the edges on the bluff body do not exceed 1 mm (0.04 in), the following general
statements apply (in the case of non-abrasive and non-corrosive media, such as in most water and
steam applications):
• The measuring device does not display an offset in the calibration and the accuracy is still
guaranteed.
• All the edges on the bluff body have a radius that is typically smaller in size. As the measuring
devices are naturally also calibrated with these radii, the measuring device remains within the
specified accuracy rating provided that the additional radius that is produced as a result of wear
and tear does not exceed 1 mm (0.04 in).
Consequently, it can be said that the product line offers lifelong calibration if the measuring device is
used in non-abrasive and non-corrosive media.
Air and industrial gases
The measuring device enables users to calculate the density and energy of air and industrial gases.
The calculations are based on time-tested standard calculation methods. It is possible to
automatically compensate for the effect of pressure and temperature via an external or constant
value.
This makes it possible to output the energy flow, standard volume flow and mass flow of the
following gases:
• Single gas
• Gas mixture
• Air
• User-specific gas
For detailed information on the parameters, see the Operating Instructions.→ See page 52
