Signal conditioning
dozen into the crate, so there is no precise control over their release. This does not matter though, as the crates do not contain a specific number of sweets. What really matters is that we know the precise weight of each crate. The load cell needs to have a high level of accuracy and good repeatability - and obviously it must be sturdy because it is used a lot. The filling process for a crate takes a few seconds and - during this period of time - the cell weighs the empty crate before it’s filled. It carries out dynamic weighing to decide when to stop filling and then weighs the crate once it’s full.”
Flexlink's Collaboration with hbM
Integration was not very difficult. To carry it out, FlexLink used the skills of HBM: “Our contact chose the most suitable components for our case and provided us with on-the-job training (over several hours) which now allows us to operate independently,” concludes Hacquin. The HBM contact in question was Bernard Vindret, an expert in dynamic weighing. The technical choice - as always - was dictated by the needs of the application. Here there was a need to carry out high-speed dynamic weighing and the load cell needed to be able to connect to the machine’s PROFINET fieldbus. At the time of selection, there was no digital load cell with such an interface, but HBM had a solution. “We have used a classical approach, with an analogue sensor combined with a digital conditioner,” states Vindret. “Or - more specifically - the PW18 (analogue) sensor combined with a ClipX BM40IE smart amplifier.” And what are its dynamic characteristics? “It is a subject to which HBM attaches a great
PW18 single point load cell in use
deal of impor tance,” Bernard Vindret. “As the market is very demanding. The PW18 is able to meet dynamic needs properly thanks to its very high natural frequency (or stiffness). Once it receives a load, stability is achieved within a few dozen milliseconds or even less. Therefore, the sensor regains its balance quickly and saves energy between both weighings, which contributes to its longevity for applications that are frequently used, such as FlexLink’s model for Carambar.”
HBM
www.hbm.com A precise And eAsily integrAble signAl conditioner
adapts to any measurement task, regardless of whether it is used with single- or multiple-channel applications, manufacturing machines, or production monitoring. ClipX allows for easy implementation of any number of individual, stand-alone measurement chains or measurement systems with up to six devices that can communicate with each other. The signal conditioner provides all the latest automation interfaces to integrate the device into comprehensive, digital control concepts (PROFINET, PROFIBUS, Ethernet/IP, EtherCAT, current, and voltage). Both analogue and digital measurement chains can be built
W
up with ClipX. HBM’s sensors are optimally matched to the ClipX signal conditioner and provide interference-proof measurement results. ClipX already fulfills the requirements of the future networked
production. A particular feature is the intuitive web interface that also allows remote operation, parameterisation, and diagnosis. ClipX is self-monitoring and helps prevent machine downtime due to the early detection of faults (predictive maintenance). This is possible due to Smart Functions such as health monitoring, remote diagnosis, and pre-calculated channels.
Instrumentation Monthly August 2020
HBM, in addition to its range of signal conditioners and data acquisition systems, also offers sensors for measuring torque, force, displacement and other mechanical quantities. Customers benefit from a complete solution for industrial measurement and control with fast set-up times, high measurement data quality and meaningful results across the entire measurement chain.
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ith an accuracy class of 0.01 and digital working standard calibration certificate included, HBM’s ClipX is setting new standards in industrial process control. The module
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