2.1 Preparation of the analyzer for work

Install the analyzer on the horizontal plane, having provided convenience of work and a condition of natural ventilation. Install the sample receptacle in the holder. Connect the power supply unit to network ~ 220 V or a cable for food from onboard network of the car to the car lighter 12 V. Connect the output connector of the power supply unit (or a cable for food from onboard network of the car) to the socket of connection of the power supply of the analyzer 1. On the display the message will appear:

In 2 seconds in the lower line of the display serial number of your analyzer, and then number of the current analyzed product (number of graduation) appears. The analyzer will include the mode of warming up and on the display the message will appear:

On warming up of the analyzer no more than 5 minutes will leave.After warming up on the display to appear the message:

The entrance to the service menu is carried out as follows: press at the same time the INPUT and START buttons, then release the START button, continuing to hold the ENTER button until on the indicator the inscription appears:

Press the button <or> for the choice of a menu item.

The menu consists of two points:

1. Choice of a product (graduation choice). If your analyzer calibrated for measurement more than one type of products (or has several options of graduation), you can choose the necessary product (one of five).

2. Language of messages. In this point it is possible to change language of the messages displayed on the display (Russian/English). During the work with the menu the following buttons are used:

"INPUT" - confirmation of the selected item.

<or> - the choice of the necessary point.

For an exit from the menu press the START button.

2.4 Use of the analyzer

Make sure that the analyzer is ready to work - on the display the message has to be displayed:</or></or>

Pour test in a probopriyemnik. The analyzer will begin measurement automatically. On the display the message will appear:

During measurement the lower line of the display will be filled with rectangles. Process of measurement will come to the end when all lower line is filled with rectangles. After the end of measurement on the display results will appear:

Where: F– fat; With - SOMO; In W– water; П – density.

Washing

• disconnect a food cord from network;

• warm up clear water to 50-60 °C and part in it the Reactant No. 1 (0,5g. on 100 ml. waters);

• pour into a sample receptacle of this solution (wash solution № 1);

• connect the syringe for washing to the union and make the piston of the syringe of 10-15 back and forth motions;

• replace flushing solution and repeat washing;

• change water until water doesn't become transparent;

• wash out the measuring channel of the analyzer the distilled water;

• blow the channel the empty syringe.

Report on performance of a task

By results of tests write a conclusion.

Control questions:

1. What it is based analysis BONDS methods on?

2. What parameters measure BONDS methods?

3. What requirements are imposed to the made milk on physical and chemical indicators?