LactoScope Filter
 
Calibration

Calibration Procedure
When making a new calibration it is good practice to obtain a printed copy of the current calibration data prior to adjustment. If an existing calibration is suspect then it may be necessary to set the slope and bias figures back to their default values (1 and 0). First select the product to be adjusted then perform the following procedures:-

To make a printout press 4 - SetUp followed by 2 - SetUp then 3 - Print Menu and finally 1 - Print Products. This procedure will print the existing slope and bias values. Return to the main menu by pressing 4 - Back.

If required, reset the slope & bias press 4 - SetUp followed by 3 - Adjust Product. It is then necessary to enter the password to reach the calibration menu. From this menu select 3 - Manual and proceed to change the slope values to 1.000 and bias values to 0.000, for each component to be calibrated in turn, pressing enter after each change. Return to the main menu by pressing 4 - Next then 4 - Back.

Skim Milk Fat Single Standard
1/ Select Calibration for Fat free milk.

2/ Zero with water (minimum of three times) and ensure repeatability.

3/ Analyse a skim milk standard three times.

4/ Calculate the average Fat value of the three measured values.

5/ Flush the system.

6/ Select 4 - SetUp followed by 3 - Adjust Product and enter the password.

7/ From the calibration menu. Select 3 - Manual and press enter to accept the current Slope. Then calculate the new bias setting by subtracting the average measured Fat value from the value of the chemical standard.

8/ Enter this figure as the new bias.

   
Note: The slope for Skim milk should be kept at 1.000. Example:
Average measured value = 0.08%
Chemical value = 0.11%
Add 0.03% to the old bias value
 

Milks
1/ Select the product to be adjusted

2/ Zero with water (minimum of three times).

3/ Analyse all the standards in duplicate, in their recorded numeric order.

4/ Perform a 1 - Clean cycle to remove all traces of Milk from the system.

5/ Select 4 - SetUp followed by 3 - Adjust Product and enter the password.

6/ From the calibration menu select 1 - Calib then type in a number equivalent to the quantity of standards analysed.

7/ Now enter the mean values found by the LactoScope analysis followed by the values for the standards, all in their recorded numeric order.

8/ After accepting these values the regressions are calculated and accepted if within required limits.

Creams
1/ Select the product to be adjusted.

2/ Zero with water (minimum of three times).

3/ With the cream standards warmed to approximately 40oC (+/- 3oC) analyse each standard in duplicate, in their recorded numeric order.

4/ Perform a 1 - Clean cycle to remove all traces of Cream from the system.

5/ Select 4 - SetUp followed by 3 - Adjust Product and enter the password.

6/ From the calibration menu select 1 - Calib then type in a number equivalent to the quantity of standards analysed.

7/ Now enter the mean values found by the LactoScope analysis followed by the values for the standards, all in their recorded numeric order.

8/ After accepting these values the regressions are calculated and accepted if within required limits.

Calibration Control Adjustment
1/ Select the product method to be adjusted.

2/ Analyse the control standard twice.

3/ Select 4 - SetUp followed by 3 - Adjust Product and enter the password.

4/ From the calibration menu select 2 - F-Calib.

5/ Using the ← → keys move to the component to be adjusted.

6/ Now with the ↑ ↓ keys, alter the measured value on the display to correspond with the value of the standard.

7/ Pressing enter twice will accept an adjusted calibration.