Multifrequency technology
What does the term mean?
A multifrequency measuring system examines material at several microwave frequencies. This provides different signal observations for joint evaluation. The particular measurement and evaluation method determines how these observations contribute to a process value.
Relevance to process measurement
Several frequencies provide more data but do not replace product trials. Their number alone establishes neither a fixed accuracy nor a universal measuring range. What matters is suitability for the intended materials and operating conditions.
How is the benefit of several frequencies assessed?
Assess the complete system for the actual task, including signal quality, geometry, product properties and reference measurements. Compare results across the real working range, including expected temperature and recipe changes.
Check calibration with independent samples. The multifrequency technology described for MicroSinus in MWM product information is a feature of its measurement method. Select the configuration and settings through project planning and the applicable technical documentation.
Evaluate measurement methods using reference samples
The term ‘multi-frequency technology’ initially describes the use of several frequencies to analyse the medium. However, for operational assessment, it is the result of the entire measuring system that counts. A meaningful comparison therefore involves the same products, the same operating range and the same reference method. If different measuring methods are tested on different samples or at different times, deviations cannot be clearly attributed to the respective method. The number of frequencies used does not replace these comparison conditions.
In addition to typical operating conditions, take into account the intended limits of the application. These include changes in temperature and formulation, insofar as they occur during normal operation. Use independent samples to verify that the correlation between the signal and the target variable remains valid within these ranges. Values outside the range under investigation should not be considered confirmed solely on the basis of an unremarkable display reading.
When making an enquiry, a specific description of the measurement task is therefore more helpful than simply stating a desired number of frequencies. Please specify the medium, target parameter, measurement range, installation requirements and any existing laboratory reference data. For MicroSinus, the valid technical documentation and application-specific project planning form the basis for determining a suitable design and its testing.