They differ in the methods of analysis. On this basis, analyzers can be divided into devices using “standard” methods (weighing, extraction) and devices with indirect data collection methods.
As an example of the first type, you can enter Kjeldahl devices. They calculate the mass, the temperature of the sample and the chemical composition. Instruments of the second type are used in the work of such methods of analysis as ultrasound, optical activity, spectroscopy.
Analyzers also differ in power. Some can perform 50 tests per day, others – 100, and others – 200. The speed of measuring the parameters is also different: from 15 seconds to three minutes.
The devices have a different configuration. You can only buy a milk quality analyzer without additional features. You can purchase a device that prints the results with the included laptop, computer software, or a pipeline.
The device can be powered from the mains with a voltage of 220 volts and can be combined. It will then operate from the car network.
Finally, analysts are imported and Russian. The latter are better in terms of maintenance: you can always call the manufacturer and have no problem talking to specialists.
How to use the milk analyser
Improper handling of the device, you may receive incorrect data. That is why it is important to carefully study the rules of operation of analysts.
Different models may have some nuances in use, but in general the work follows the same pattern. The device is placed on a flat, stable surface in a vertical position. Then you need to warm up. Some start to heat up immediately after connecting to the mains, others have to give the appropriate “command”. Warming up can take up to 20 minutes. More details here: https://profitechs.com/product-category/milk-analyzers/
The test product is then placed in a sample container and then in the apparatus. It is important that the samples are at the appropriate temperature (this is stated in the instructions). If the analyzer is using a suction pump, close and select the mode you need. Insert the measuring vessel with the product from which the sample was taken. When the analysis is complete, the device will show the result on the display and if there is a thermal printer, the data can be printed. They can also be saved on a computer. It is important to wash all pipes and the measuring chamber after using the device, otherwise the following data will be in question.
Note that after washing, the results of the first test are not taken into account, as there may be water left in the analyzer to affect the figures.
Why and how often calibration is needed
When buying a milk quality analyzer, you must remember the calibration, otherwise there may be errors in the results. Some devices are calibrated by the manufacturer, but you still have to do it yourself. After all, the plant procedure is performed with milk samples taken in the manufacturer’s area. It is no secret that the composition of the product can vary considerably, because it is geographically dependent on feed, time of year and other conditions.
For the same reason, calibration is often performed for instruments using daily spectroscopy. Analyzers of the second type (with ultrasound) are not so capricious, are not so sensitive to the conditions of the analysis and it is more difficult to “confuse” with them. However, they also need calibration, usually twice a week.