TAPIO Paper Machine Analyzer (PMA) and TAPIO TS Profiler for paper quality measurements

TAPIO Paper Machine Analyzer (PMA) can be used to measure both paper and printed paper with very high resolution both MD and CD direction (Figure 1).

TAPIO TS Profiler is a cost effective solution for paper mills or institutes needing the capabilities of TAPIO PMA but main concern is placed on CD variation and troubleshooting.

TAPIO Profiler is basically TAPIO PMA having most of the PMA features in a smaller package. Unit is a "desk top" design and uses exactly the same sensors as the "big brother" TAPIO PMA. This means that profiler is easily upgradeable to the PMA if further capabilities on MD side are later needed.

Both analyzers are able to measure all levels of variation (CD, MD, random/residual). The measurement steps start as low as 17 m and with lighter sheet weights, sample lengths as long as 7 km. (4,4 miles) can be measured (PMA). With this measurement range, the unit is able to cover the whole range of variation spectrum ranging from the long term (0.003 Hz to the very short term 40 000 Hz). Figure 3 illustrates that with this wide frequency analysis range basically all paper machine component frequencies, as well as control type ones, fall within this range. This wide frequency range makes it possible to solve various processes and printability problems related to basic papermaking.

The distances between each of the sensors of TAPIO PMA and Profiler are exactly known. In the software these distances are accurately zeroed, resulting in the exact same point of the paper being measured with each sensor. This ensures that the user always knows how the measured values compare to one another at any point during the measurement, both on a "micro and macro" level and that accurate paper machine diagnostics can be achieved.

TAPIO PMA can house even ten or more sensors while TAPIO Profiler can have up to four sensors- one should note that all of these sensors are always active i.e. measuring at the same time. This means that the user gets all the measurement data in very short time period compared to traditional laboratory measurements. Due to the high-speed sensors the paper can be moved also very fast - even 1 m/s speed through the analyzer- so that large amount of data can be acquired in relatively short time period.

Figure shows how the variation frequency generated by various machine components range from long term to very short term. The analyzers wide frequency measurement range is able to pinpoint all of these machine component sources.

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