Additional application diagnostics are now available on the Krohne H250 M40 variable area flowmeter for more reliable applications. This is in addition to electronic device diagnostics. These new functions are performed by intelligent software algorithms that analyze the magnetic field information signals from the sensors.
The existing NE107 device diagnostics has been extended to include application-specific diagnostics functions for variable area flowmeters: the device is now able to detect float blockages caused by impurities in the product to be measured, or by repeated, violent water hammer, for example. It also detects pulsations in liquid measurements with positive displacement pumps, and oscillations due to compression in gas measurements. In addition, the system generates a message if the float is installed upside down in the measuring cone, or if it is completely missing after maintenance or cleaning. The severity of individual diagnostic functions can be configured according to Namur NE107 categories: from "for information" to "maintenance required" or from "out of specification" to "failure", with activation of the failure signal.
These new functions not only improve application reliability, but also optimize the measurement accuracy and service life of Krohne variable-area flowmeters by implementing appropriate corrective measures. Existing devices can be upgraded by replacing modules on site.
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