Operation Manual for - Mrclab.com

Ultrasonic milk analyzerFor exampleМ% of the reference samples: 2,20 3,00 3,80 4,60 5,20М%average when measuringwith the analyser: 2,38 3,17 4,01 4,79 5,42Difference: 0,18 0,17 0,21 0,19 0,22Conclusion: the difference is relatively constant value and correction ispossible to be done with – 0,2 % (see Corrections, p6.3.3)6.2.2.2. If the differences are not a constant value it is necessary recalibrationto be done.For example.М% of the reference samples: 2,20 3,00 3,80 4,60 5,20М% when measured with theanalyser: 2,02 2,93 3,76 4,75 5,44Difference: -0,18 -0,07 -0,04 0,15 0,24Conclusion: It is obvious that the difference is variable value andrecalibration have to be done (See Recalibration, p.6.4).6.3. Making corrections6.3.1. Possible corrections, limits and changing stepsEvery parameter from each calibration may be separately corrected. Below isthe table with possible corrections, limits and changing steps:Parameter Increasing Decreasing StepFAT 0.95% 0.95% 0.01%SNF 4.75% 4.75% 0.05%Density 4.75% 4.75% 0.05%Lactose 0.95% 0.95% 0.01%Salts 0.95% 0.95% 0.01%Proteins 0.95% 0.95% 0.01%Added water 9.00% 9.00% 1.00%Sample’s temperature 9.90 o С 9.90 o С 0.1 o СOperation manual 26/98