38 food & drINK ProCESSINg
Online viscosity control increases
process productivity and efficiency
key parameter in food process proved its worth in numerous installations
In every process there are
certain critical, ‘make or
break’ parameters which
A
monitoring and quality control is around the world, with a clean-in-place solid-rod
viscosity. It is directly related to the sensor that presents minimal possibilities of
flow characteristics of the product, fouling. The instrument has a truly hygienic
directly determine
influencing such properties as pumpability, design, with a crevice-free all-welded 316
product quality. With
better understanding and
pourability and spreadability. But the food stainless steel construction which eliminates the
control of such
processing environment presents a number of risk of material entrapment or ‘dead’ spaces
parameters come
challenges to viscosity measurement, including where microorganisms could propagate.
improvements in
hostile process conditions and the complex and The XL7 viscometer can be mounted in any
efficiency and often unpredictable rheological properties of orientation and in any location using any size or
productivity, reductions in
fluid foods. Offline viscosity measurement type of fitting, including sanitary types such as
reject rates and greater
techniques are generally cumbersome, quick-release tri-clamp, RJT, IDF or DIN. The
potential for automation,
labour-intensive and prone to operator error. measurement technique deters material build-up
with all the cost benefits
Online viscometers have to deliver continuous on the sensor but has no effect on the fluid.
these imply.
measurement day after day with excellent Although the XL7 has very high sensitivity, it
repeatability but minimal maintenance. They naturally rejects plant noise and vibration and is
Chaque processus
should combine ease of cleaning in place with unaffected either by fluctuations in flow or the
comporte certains minimal risk of fouling and must also meet strict presence of bubbles or solid particles.
paramètres critiques sanitary requirements. Factory-calibrated using certified viscosity
qui vont déterminer
Few instruments can satisfy such tough standards traceable to NIST, the XL7 requires no
directement la qualité du
demands. Those that do quickly pay for field calibration. With no moving parts, seals or
produit. Une meilleure
themselves many times over. Now that online bearings it is virtually maintenance-free, giving a
compréhension et un
viscometers capable of accurate, reliable and very low total life-cycle cost.
plus grand contrôle de
ces paramètres permet
trouble-free operation are becoming available, Outputs include a 4–20 mA analogue viscosity
d’améliorer l’efficacité
food processing companies around the world signal and a more comprehensive RS232 serial
et la productivité, de
have been quick to seize the opportunity they data link for remote monitoring or viscosity
réduire les taux de rejets offer to monitor and control viscosity in real control.
et d’accroître le potentiel
time. The benefits are such that no processing
d’automatisation,
engineer can afford to ignore them.
Pizza sauce
avec tous les bénéfices
The Hydramotion XL7 online viscometer is A team at University College, Dublin compared a
financiers que cela
designed to satisfy the most demanding number of sensors, including the Hydramotion
implique.
requirements of the food processing industry. It XL7, while looking for a reliable method of
is a rugged ‘fit-and-forget’ instrument that has continuously determining the viscosity of pizza
In jedem Prozess gibt es
bestimmte „Alles oder
Nichts“-Kernparameter,
die sich direkt auf
die Produktqualität
auswirken. Ein tieferes
Verständnis und eine
optimierte Steuerung
dieser Parameter führt zu
verbesserter Effizienz und
Produktivität, niedrigeren
Ausschussraten und
einem größeren
Fig. 1. A diagram
Automatisierungs-
of a pizza sauce
potenzial, wodurch
production line
wiederum Kostenvorteile
entstehen.
showing where
the Hydramotion
XL7 online
viscometer fits in.
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