| Abstract: | Continuous Volume and Density Measurement of Starch Suspensions. This contribution deals with continuous volume and density measurements of starch suspensions. After a foreword as introduction and presentation of the problem range the inductive volume, radiometric density and gravimetric density measurements are discussed in three different chapters. In each of these chapters first the principal of the measuring system as well as the construction and operation of the measurement unit tested are described. A detailed report on the performance of the tests finally is followed by the discussion of the results which can be summarized as follows: Apart from restrictions and difficulties demonstrated in detail no apparatus trouble did occur. Refered to the obtained test data all measurement units are to be evaluated as absolutely suitable for continuous volume and density measurements as absolute measurements. With regard to the inductive volume measurements the sediments amounted on the average less than 1,0% thus remaining within the measuring tolerance of ±1,25% as indicated by the manufacturing company. Also the radiometric density measurements on the average resulted in maximum divergences of only ±0,10% with the radiometric density measurement unit I and of likewise only ±0,15% with the radiometric density measurement unit II, thus again remaining within the measuring tolerance of ±1,0% of the measuring result as given by the two manufacturers. The observed divergences of the gravimetric density measurements as result of sediments in the measuring section stayed after one-week test period within the error limit of ±1,0% as limited by the manufacturing company. The determined measuring accuracy, therefore also was fully sufficient provided that the measuring divice was carefully rinsed once a week. |
