DIN 66165 DOWNLOAD
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Designation standards: DIN 66165-2:1987-04 Note: WITHDRAWN Publication date standards: 1.4.1987 SKU: NS-212268 The number of pages: 4Approximate weight : 12 g (0.03 lbs) Country: German technical standard Category: Technical standards DIN
FRITSCH Advantage AMPCONTROL for setting a constant amplitude, which is automatically monitored and regulated. Your advantage: guaranteed constant amplitude, meaning precisely reproducible sieving results in accordance with DIN 66165-1 and the possibility to calibrate and validate your ANALYSETTE 3 PRO as an inspection instrument in inspection of measuring and testing equipment according to ISO 9001.
Die Siebanalyse (selten auch Analysensiebung) ist ein Verfahren der Partikelmesstechnik zur Ermittlung der Korngrößenverteilung von Schüttgütern. Sie ist ein wichtiges Verfahren bei der Qualitätssicherung und wird in der Deutschen Norm DIN 66165 beschrieben. Die Norm besteht aus zwei Teilen; DIN 66165-1 definiert die Grundlagen, DIN 66165-2 die Durchführung der Siebanalyse.
The selection of the sieves depends on the sample quantity and on the approximate particle size distribution. To cover the complete particle size range of the sample, the increments of the mesh apertures should follow a logarithmic series. This is frequently done with the help of the Renard series, for example R10/3. The standard DIN 66165 contains some guidelines on the selection of sieve diameters and mesh sizes. It also stipulates the maximum sample load permitted for different mesh sizes and also the maximum particle size.
The maximum sieve oversize permitted on a sieve can be approximately calculated with the formula R = 0.00178 x D2 x w0.667 x ρwith R being the maximum permitted sieve oversize in [g]. D stands for the sieve diameter (200 mm / 300 mm etc.), w is the mesh size in [mm - (the value is used in the formula without unit)] and ρ describes the material density. In the standard 66165 and in the above example a density of 1 kg/dm3 was assumed. The standard also describes the maximum load per sieve which should not exceed the maximum sieve oversize R by more than twice the amount.The maximum particle size permitted can be calculated by using this formula xmax = 10 x w0.7 with xmax [mm] being the maximum particle size permitted, and w describing the nominal mesh size of each sieve (the value is used in the formula without unit). For a sample on a sieve with an aperture size of 250 microns the following calculation is used to determine the maximum particle size permitted:xmax = 10 x w0.7xmax = 10 x 0.2500.7 xmax = 3.79 (unit = mm)
Sieving time:According to DIN 66165 the sieving process is considered as finished when, after one minute of sieving, less than 0.1% of the feed quantity passes the sieve. If the undersize is larger the sieving time needs to be extended. Experience has shown that vibratory sieving in 3 dimensions is particularly suitable for achieving a sharp separation of fractions in a very short time.
The sample is fed in from the funnel and feed channel so that all particles fall through the measurement field. During the measurement procedure the two cameras (CCD) take over different jobs: the Basic Camera (CCD-B) records large particles, the Zoom Camera (CCD-Z) detects fine particles (figure 4). The contactfree optical measurement is carried out in real time and simultaneously ascertains all the required information about particle size and shape. To make this possible in the context of an automated continuous analysis, an online version was developed which can be customized to the particular requirements. The obtained results can be presented graphically and in tabular form as size fractions, frequency distribution or cumulative distribution. In addition, the CAMSIZER can determine the number of particles as well as the specific surface, the density and also the transparency of the sugar crystals. All parameters are ascertained with great precision and excellent reproducibility. The CAMSIZER software also allows the presentation of daily reports, trend analyses, mean value calculations and much more. In accordance with DIN 66165, a well structured customized measurement protocol can be generated. The CAMSIZER is also highly suitable for the size and shape analysis of beet seeds which can be measured raw and with coating finish. 153554b96e
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