Reached the leadership in the Italian market, we are now approaching the European market, participating at one of the most prestigious international fairs. We thank all our visitors for the interest in our production. This participation was also an opportunity to present the new product BataCAP60-3G and BetaCAP60X100 : the visitors did appreciate the power of those products and the friend human interface
In the standard version, the materials in touch with gases are fluorinated plastics, highly corrosion resistant. The effects of some characteristics of these materials (in particular the permeability) make them unsuitable for some specific application:
measurement of oxygen in ppm. In this case, in spite of the overpressure of the internal circuits with respect to the environment, some of the oxygen contained in air permeates through the tubes polluting the sample.
some components, such as HF, HCl and HN3 have the characteristic of saturate the surface porosity of the plastics. The adsorption process takes long time and, particularly when concentration is low, the selective subtraction of molecules causes an important concentration reduction that return regular only when plastics are saturated (up to a couple of hours time).
We then made available execution "All steel" for internal modules, which are connected together and to the interface panel with stainless steel 1/8" tubes and compression fittings. All these components are made by AISI 316L , pickled and electropolished. Made by plastic material (PEEK) remains only the body of the solenoid valves, while all the seals are fluorinated elastomers. To achieve significant reductions in response times it is necessary that also the connections towards the external cylinder of "Span" and to the analyzer are steel made . The counterpart over the use of plastics is a moderate increase in the cost (10%) and weight (25%) and the lower flexybility of the external connections.
It's a tool of our design that converts a capillaries lot "as is" with characteristics dispersed in a series of groups of homogeneous capillaries. The selection process is made in a continuous way, through a series of steps: extraction and positioning of the capillary, insertion in the measuring head, compression and verification of the seals, flow measurement at constant pressure applied, verification of alignment of the measurement system with a capillary fixed reference, positioning of the multi-compartment on the XY plane, according to measurements obtained and finally drain the capillary in the proper sector.
We have long felt the need to overcome the manual method of selection for the capillaries: for a thousand capillaries (this is the typical size of a lot) were needed several days of tedious work, subject to approximations due to temperature changes (also those due to the heat of the operator fingers) and the inevitable human errors. Only with a second cycle of selection, on lots already preselected it was possible to obtain the degree of the required accu-racy. The availability of funding on a regional share of investments made led us to proceed. The benefits of the automated solution are even more significant from the quality point of view.
The PC that manages the automation receives for each measure a series of values that are averaged and corrected on the basis of the reference measurement. The area of measurement is thermostat-regulated so as not to be affected by the environmental conditions and the operator does not enter into physical contact with the capillaries if not the time of loading in the hopper and the substitution of the multi-compartment tray.
From the point of view of the documentation quality, a report is available for each selection process, representing the different sectors of the output tray and the respective numbers (amount and flows). Nevertheless, in the construction of one or more gas dividers, anoter selection step is required. Starting from one or more classes of pre-selected capillaries, testing them one by one, the capilla-ries "off-specification" are replaced up to the achievement of a lot with the characteristics of uniformity unintended. Even this latter gear is operated by the PC with another tool for 36 capillaries at a time. Both for the scanning phase, leak detection and measurement of the 36 capillaries, take a short time but are very accurate. The shortness of the scanning time eliminates the need for temperature control. It should also be considered that, in any case, the required accuracy is not about absolute measurements of flow, but exclusively about comparative measurements: the objective is the attainment of homogeneity of the characteristics in the lot to be used for the construction of each diluter.