LABEC M-MIA-LA User Manual

INSTRUCTION MANUAL

Laboratory Equipment Pty Ltd
email: [e-mail]
Ph: 02 9560 2 811 • Fax: [phone]

www.labec.com.au

2014

Operation Manual for

Milk Analyzer

MIA-LA

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION

Ultrasonic milkanalyser

Switching Adapter

• Input: 100 - 240 V ~1.6 A max.
50-60 Hz

• Output: +12 V

4.17А min.

• Output power: 50 - 65 W

Measurement modes

• cow milk

• sheep milk

• UHT milk

• goat milk

• buffalo milk

• cream

• whey

• recovered milk

• other /pasteurized milk/

CAUTION!

Keep the switching adapter dry!

Please, read and follow strictly all the instructions in the manual.

Due to continuous improvement in milk analyser, information contained in this

manual is subject to change without notice. Contact producer for revisions

and corrections

Ultrasonic milkanalyser

SAFETY INSTRUCTIONS

1. Read this manual carefully and make sure that you understand all the
instructions.

2. For safety purposes the device is equipped with grounded power
cable. If there is no grounded electrical outlet where the device will
be used, please, install such before using the device.

3. Place the device on leveled and stable plate. In case it falls or is
severely shocked it may be damaged.

4. Connect to the electrical network in such a way that the power cable
to stay away from the side for accessing the device and not to be
stepped on.

5. Every time before cleaning the device switch it off and unplug it from
the electrical outlet. The device has to remain unplugged till the
cleaning completion.

6. Do not disassemble the unit in order to avoid possible electrical
shock. In case of malfunction contact your local dealer.

7. Handle the liquids the device works with carefully, following all the
instructions for their preparation.

8. Place the switching adaptor in such a way as to be protected from
overflow and spillage of liquids.

Ultrasonic milkanalyser

PARTS AND ACCESSORIES

In the table below the standard delivery configuration of the milk analyser is
listed:

№ Description

Item № pcs

1. Ultrasonic portable milk analyzer LSLA001 1

1 sample measurement time

90 sec.

60 sec
30 sec

2. Operation manual LSLA002 1

3. Plastic sample holder LSLA003 2

4. Spare Pipes LSLA004 2

5. 12 V DC Power Supply Cable LSLA005 1

6. Alkaline cleaning solution Lactodaily 100 g 1

7. Acidic cleaning solution Lactoweekly 100 g 1

In the table below the milk analyser spares and accessories, which are
delivered on customers’ request are listed:
№ Description

a) included in the set:

Item № pcs

/

b) not included in the set (may be

additionally bought):

8. RS232 Interface Cable - Analyser-IBM PC LSLA006

9. Service Pack - CD LSLA007

10. pH measuring system LSLAS009 1

11. pH probe with cable and holder LSLA010 1

12. Buffer solution Ph 60 ml

LSLA011 1

(pH7.00±0.01/20˚C)

13. Buffer solution pH 60 ml

LSLA012 1

(pH4.00±0.01/20˚C)

14. Milk conductivity measuring system LSLA013 1

15. Buffer solution conductivity 50 ml (5.02

LSLA014 1

(±5%) mS/cm (18±0.1˚C)

16. Real time clock LSLA015 1

17. High-fat measuring function LSLA016 1

Ultrasonic milkanalyser

18. ECS POS Serial Printer LSLA017 1

19. 12 V Serial Printer Power Supply Cable LSLA018 1

20. RS232 Interface Cable - Milk Analyser –

Serial Printer

21. Power supply from embedded accumulator
with charger

LSLA019 1

LSLA021 1

1

22. Plug type

1

Ultrasonic milkanalyser

1. FUNCTION

The function of the milk analyser is to make quick analyses of milk on
fat (FAT), non-fat solids (SNF), proteins, lactose and water content

o

percentages, temperature (

С), pH, freezing point, salts, conductivity as
well as density of one and the same sample directly after milking, at
collecting and during processing.

Ultrasonic milkanalyser

2. TECHNICAL PARAMETERS

2.1. Working modes characteristics:

The program of the milk analyser has four working modes.

2.1.1. Measurement mode milk / dairy product – first type

2.1.2. Measurement mode milk / dairy product – second type

2.1.3. Measurement mode milk / dairy product – third type

These modes have been calibrated on customers’ request for 3 milk types
from the following: cow, sheep, UHT, buffalo, goat, camel milk, cream, ice
cream mixtures, whey, recovered milk, etc. before leaving the production
facilities and the text on the display will be for the corresponding types, as is
indicated on page 2 Measurement modes.

2.1.4. Cleaning

2.1.4.1. Current

2.1.4.2. Final

Ultrasonic milkanalyser

2.2. Measuring range:

Fat ………………..................... …………..from 0.01% to 25% (45%*)

SNF ……………………………… ...…………………....from 3% to 40%

Density ** ………………………. ……...…….from 1000 to 1160 kg/m3
Proteins …………………………. ……………………..from 2% to 15%
Lactose ………………………... …………………from 0.01 % to 20 %
Water content ………………… ……………...……..from 0 % to 70 %
Temperature of milk …………… from 5oC to 40oC (if measurement is

30 sec, then t° is from 15 to 40°)
Freezing point ****……………… …………..from – 0,400 to – 0,700oC
Salts ……………………………. …...…………...………from 0,4 to 4%
PH***……………………………... …………………..………from 0 to 14
Conductivity** ………………… ……………...…from 2 to 14 [mS/cm]

* Option, on customers’ request

** Density data are shown in an abbreviated form. For example 27.3 have to

3

be understood as 1027.3 kg/m

. To determine the milk density, write down
the result from the display and add 1000.
Example: result 21,20; density = 1000 + 31,20 = 1031,2 kg/m

3

The abbreviated form of the density is used also when entering data for
samples in working mode Recalibrate, for example:
If the measured sample density is 1034.5 kg/m3, then in the menu for
entering the samples parameters used for calibration, across the parameter
Den = , you have to enter 34.5.

*** pH and conductivity measurements are optional and are embedded in the
device on customers' request.

**** Please, carefully read Appendix Freezing Point.

Ultrasonic milkanalyser

2.3. Accuracy:

Fat …..………………………………..
SNF …………………………………..
Density ………………………………
Proteins ……………………………...
Lactose ………………………………
Water content ……………………….
Temperature of milk ………………..
Freezing point………………………..
Salts ………………………………...

…...………………….…...± 0.06%
…………...………….…...± 0.15%
………………………..± 0.3 kg/m
……...……………….…...± 0.15%
.…………………………...± 0.20%
.…………………………….± 3.0%
.………………………………± 1
..……...…………………± 0.005

…..…………...…………...± 0.05%
PH** …………………………………. ………………………………±0.05
Conductivity** ………………………. ……………………..±0.05[mS/cm]

o

o

3

C

C

Accuracy values in point 2.3 are in dependence on the correctness of the
corresponding chemical method, used for component content determination.
In point 2.3. are used the following reference methods: Gerber – for fat,
gravimetric – for SNF, Kjeldahl – for protein. The boundary for maximum
variation of repeatability when the power supply voltage is from +10 to – 15%
from the nominal voltage values (220V) have to be no more than 0.8
accuracy according point 2.3. The analyser is used in conditions free of outer
electrical and magnetic fields (except the magnetic field of the Earth) and
vibrations.

2.4 Correct ambient conditions:

Accuracy is guaranteed in case of normal ambient conditions:

Air temperature………………………… ….…from 10

o

C to 40oC (43 oC)
Relative humidity ……………………… ……………...from 30% to 80%
Power supply ………………………… …………………...220V (110V)
extent of contamination at normal environmental conditions…………..2

2.5. Dimensions:………………………….250/290/300 mm, mass 4,0 kg

2.6. Continuous working time:

………….………………………….…...……....non-stop

2.7 Milk sample volume per one measurement:

3

………………………………..………..15 cm

(= 15 ml)

Ultrasonic milkanalyser

Fig.1 Front panel

1. Button Up 6.pH probe holder

2. Display 7.input pipe

3. Button Enter 8. sample holder

4. Button Down 9.waste liquid pipe

5.pH probe 10. ss grid

Ultrasonic milkanalyser

Fig.2 Back panel

1. Power switch 8. Com Port 2

2. AC adaptor input 9. Com Port 1

3. DC Power Supply output 10. Connector for the cleaning solution

4. Parallel printer connector 11. Plastic pipe

5. pH probe input (option) 12. Metal pipe

6. Weigh Scale input (option) 13. Switching adapter

7. pH probe

Ultrasonic milkanalyser

Fig 3 Principle working scheme

Ultrasonic milkanalyser

Fig. 4 Connecting peripheral devices

Ultrasonic milkanalyser

Fig. 5 Cable Description
Art. Number 30011

RS232 Interface Cable - Milk Analyser – Serial Printer

Art. Number 30012

RS232 Interface Cable - Milk Analyser – IBM PC

2. TxD

3. RxD

5. GND

Milk
Analyser
DB 9-pin

male

PC

DB 9-pin

female

2. Receive Data
(RxD)

3. Transmit Data
(TxD)

5. Signal Ground

(GND)

Art. Number 10128

Probe pH with cable

Art. Number 30030

DC 12V Power Supply Milk Analyser Cable

1. GND

2. No connection

3. No connection

4. 12V DC

Ultrasonic milkanalyser

3. QUALIFICATION OF RAW MILK, THERMALLY TREATED
MILK, OTHER DAIRY PRODUCTS AND DERIVATIVES

3.1. Taking samples and preparation for analyses

In order to receive reliable results in qualification of milk, dairy products and
derivatives are needed: precise samples taking; correct samples storing (in
need to be preserved); correct preparation before making measurement. The

rules and requirements for this are described in details in Appendix Milk

sampling.

3.2. Making the measurement.

3.2.1. Preparing the analyser for working mode

3.2.1.1. Put the analyser on the working place, providing good ventilation and

not in the vicinity of heat providing devices or sources. The temperature in the
premises has to be in the boundaries 10-40

3.2.1.2. Check if the power switch is in "0" position and that the outlet voltage
complies with the voltage indicated on the switching adapter of the analyser

3.2.1.3. Switch on the “POWER” button, which starts the identification
procedure. For a short time the display shows the number of the software
versions, for example:

Milk analyser xxx
LCD vers xx
MA vers yy
MA ser. N. xxxx

Where:

Milk analyser xxx - is the time for measurement.
LCD vers XX - is display control software version.
MA vers YY - is the motherboard software version.
MA ser. N. xxxx - is the serial number .

o

C.

Ultrasonic milkanalyser

If in the process of exploitation there is a need to ask a question the
company-producer, you have to send the data, written on the display during
the above described initialization procedure.

3.2.1.4.Till the analyser is prepared for work (at about 5 minutes) the
following message is written on the display: “Getting ready”. Above pointed
time is in dependence of the environmental temperature and increases with
decreasing the temperature.

3.2.1.5. When the device is ready for work, a beep is heard and the display
shows: “Ready to start”. The analyser is ready to make analyses in mode 1
(normally Cow)

3.2.1.6. If you want to pass to another mode press the button Enter and hold
it pressed. The following message appears on the display:

Release button to

start menu

Release the button Enter. The display shows the possible working modes:

Milk selector
Cal1 – Cow
Cal2 – Sheep
Cal3 – UHT

-----------------------------­Cleaning
Final clean

Using “up”▲and”down”▼buttons choose the working mode and press Enter
in order to start it.

3.2.2. Making analyses

Ultrasonic milkanalyser

Make sure the analyser is still during measurement. Vibrations may lead to
inaccurate results.

To start measurement:

- pour the preliminary prepared sample in the sample holder (now you may
use holders with different size - plastic and glass 100 ml);

Fig.6 Input pipe

The input pipe of the analyser is knee-joint (mobile). Move it forward in order
to be possible to dip its end in the milk sample and place the sample holder in
the recess of the analyser..

- press the button Enter.
The analyser sucks the milk, makes the measurement and used milk sample
is poured through the holes of the grid below the input pipe of the analyser
and enters the vessel for collecting waste liquids (see Fig. 3 Principle working
scheme of the analyser). During the measurement the temperature of the
sample is shown on the display.
Ignore the results received immediately after switching on the analyser and
after measuring distilled water. Make a second measurement with new
portion of the same sample.

3.2.3. Displaying the results

3.2.3.1. When the measurement is finished, the sample returns in the

sample-holder and the display shows the results. For example:

Results:
F=ff.ff S=ss.ss
D=dd.dd P=pp.pp
L=ll.ll W=ww.ww

Where:

Ultrasonic milkanalyser

F= ff.ff - measured FAT in percentage;
S= ss.ss - measured SNF in percentage;
D= dd.dd - measured density in percentage;
P= pp.pp - measured protein in percentage;
L= ll.ll - measured lactose in percentage;
W= ww.ww - measured sample’s added water in percentage;

By pressing the button” Down” ▼ the display shows the second page,
containing the results:

Page 2 Results:
T=tt.tC pH=pp.pp
FP=-0.fff sol=0.sss

Where:

tt.tC - sample’s temperature;
pp.pp - sample’s pH result – if there is a pH probe connected;

-0.fff - measured sample’s freezing point;

0.sss - measured salts values;

By pressing the button”Up” ▲ display shows the third page with results:

Page 3 Results:

L=l.ll

Where:
L= ll.ll - measured Lactose in %;

By pressing the buttons “up”▲ and”down”▼, the operator has the possibility
to pass from one page result to another.

If the device has an embedded option “Conductivity” and "conductivity
measurement" started, the result is shown on the display, showing the basic
results replacing lactose results in the following way:
C=xx.xx
In this case the Lactose result is shown on a new page - Page 3 Results.
xx.xx is the measured milk sample’s conductivity in [mS/cm]. If the results are
outside the limits for this type of sample (see table from the Appendix

Ultrasonic milkanalyser

Conductivity measurement), the cursor flashes after the letter С, reminding
that the sample is not correct. On the printout it is printed as !!!.
If the conductiity value is outside measuring range (2-14 mS/cm), the
following message appears on the display:
C=OutRg (Out of Range), and on the printout there isn’t any line with
conductivity value.

3.2.3.2. Write down the results in the form. The results remain on the display
till a new measurement is started. If the analyser is connected to a computer,
it automatically sends the data to the computer and/or prints them.

Ultrasonic milkanalyser

4. CLEANING THE ANALYSER

This procedure prevents gathering milk fat residues and milk stone on the
sensor. The milk stone consists of milk solids, calcium, iron, sulphates,
magnesium, etc. All these substances form layer on the pipe and sensor’s
walls, which leads to deviations in the measurement results and blocking up
the piping.

The company-producer recommends usage of the chemicals, supplied with
the analyser – alkaline and acidic (Lactodaily and Lactoweekly). You may
order them separately or together with the analyser. Try to use only these
chemicals for cleaning the analyser.

In case you missed to order these chemicals the alternative is to use alkaline
and acidic cleaning solutions for dairy, produced by one the companies,
supplying such chemicals:

http://www.johnsondiversey.com/Cultures/en-GB/OpCo/Your+Business/Dairies.htm
http://www.ecolab.com/SolutionGuide3.asp?name=1345&PS_GRP_CD=FDBV&BUS_NM
http://www.calvatis.com/documents/products/produkte_farm_melkhygiene.pdf

4.1. Automatic cleaning the analyser

Analyser's contamination as a result of the irregular cleaning is the basic
reason for inexactness during measurement. In order to be avoid this, in the
milk analysers with peristaltic pump is embedded automatic cleaning. For this
purpose the analyser has to be prepared on the following way:

The reservoir with the cleaning solution have to be connected towards the
analyser and outgoing pipe towards reservoir for collecting the measured
samples and used cleaning solution, as is shown on Fig.2.

Pay attention to the pipes in both reservoirs. The pipe in the reservoir with the
cleaning solution has to be well dipped in the cleaning solution while the pipe
in the reservoir with the already used samples and cleaning solution MUST
NOT be dipped in the liquid.
Pay attention to the level of the cleaning solution in the reservoir. Add
solution when the level is below 2/3!

Description of the cleaning procedures:

Ultrasonic milkanalyser

There are two ways of cleaning the analyser embedded in it – current and
end (final) cleaning.

4.1.1. Current cleaning.

4.1.1.1. Automatic start
The current cleaning is made with alkaline solution (for working solution
preparation see 4.2.1.), with which the reservoir for the cleaning solution is
filled in.
It is automatically started, without operator's interference after the set time
intevals elapse

1. 55 min. after switching on the power supply of the analyser,
but idle work;

2. 15 min. after the last measurement of real milk sample.

After cleaning a new measurement is started in the above described
intervals.
The display shows the following message and a sound signal is emitted:

Auto clean

started!

Put empty glass

After this the cleaning is started. The display shows:

Cleaning

Please wait

If there is a glass with sample it is completely emptied and then the analyser
automatically fulfills procedure for sucking the cleaning solution and c rinsing
the analyser's inner system. In order the input metal pipe to be cleaned out
for a short time a cleaning solution is pumped out for a short time in the
already empty glass or in case there is no empty glass there – in the funnel
for the waste liquids. It is filled to the middle and then is sucked back and
poured in the reservoir with the used liquids. In case that you are sure that
you’ll not use the analyser for a longer period, but it will be connected to the
power supply and switched on, which means that the process of automatic
clean will be active, do not leave sample holder in the recess of the analyser,
in order not to be overfilled during cleaning from the output pipe. Then the
cleaning solution will be directly poured in the funnel for waste liquids.

Ultrasonic milkanalyser

After the cleaning is finished the displays shows the following:

End of cleaning

After 2 seconds the display shows:

Analyser ready

Then the analyser is ready for normal measurement.

4.1.1.2. Manual start
The current cleaning may be completed by manual start of the menu
Cleaning. It is used before starting the menu Final Clean. It serves for
cleaning the fats from the measuring tract with alkaline cleaning solution with
which the canister is filled in. It is started using the menu for choosing the
working mode of the analyser. After the measurement is completes, by
continuous pressing the button Enter, the possible analyser operation modes
are shown on the display.

Cow
Sheep
UHT
Cleaning
Final Clean

By choosing Cleaning the current cleaning is started. The display shows the
following:

Auto clean

started!

Put empty glass

In this way the current cleaning is started. The procedure and operator’s
actions are described above.

Ultrasonic milkanalyser

Do not switch off the device at the end of the working day before the
automatic cleaning procedure is completed. If it is not automatically cleaned
and there is not a possibility to wait starting the automatic cleaning, then start
manually the cleaning procedure with alkaline cleaning solution and if it is
necessary with acidic cleaning solution as it is described below.

4.1.2. End (final) cleaning.

4.1.2.1. Final cleaning.
It is done with acidic cleaning detergent (for working solution preparation see

4.2.2.). It is done daily. Serves for cleaning the protein deposits from the
measuring system of the analyser, which were not removed during work with
the alkaline cleaning solution and removing milk stone layers.

Do not use chemicals, which are not intended for milking equipment and
vessels in dairy industry. Pay particular attention to the acidic cleaning
solution concentration. The higher concentration may damage the measuring
sensor.

Always before the final acidic cleaning rinse the device with alkaline cleaning
solution by manual starting if it was not already automatically cleaned. It is
necessary to be done in order to remove the milk residues which could react
with the acidic cleaning solution.

Do not forget to rinse with clean water!

It is started using the working modes menu. After the measurement is
completed, by pressing and holding pressed the button Enter, the display
shows the possible working modes of the analyser.

Cow

Sheep

UHT

Cleaning

Final Clean

Ultrasonic milkanalyser

1. Choose Final Clean. After choosing the final cleaning, the following
message appears on the display:

Put filled with

Water glass

and press Enter

to Continue

2. Put a glass filled with water and press the button Enter in order to continue

the procedure. Then the following message appears on the display:

Cleaning

Please wait

Do not miss to clean with water because the residues from the alkaline
cleaning solution could react with the acidic solution, which will lead to gas
and sediment formation.

After rinsing with water, the display shows the following:

Put filled with
Detergent glass
and press Enter

to Continue

3. Pour warm alkaline solution in the glass and press the button Enter, in

order to continue the cleaning.
Then the following message appears on the display:

Cleaning

Please wait

Ultrasonic milkanalyser

Follow repeatedly sucking/pouring out the cleaning solution and heating it up.
After the cleaning is finished, the cleaning solution is emitted in the reservoir
with the waste liquids.

For maximum cleaning effect it is recommended the cleaning solution to be
preliminary heated up to 40-50 degrees centigrade.

Follows rinsing with water:

4. Put a glass with water for rinsing the device.

Put filled with

Water glass

and press Enter

to Continue

After rinsing the display shows the following:

End of cleaning

After 2 seconds the following appears on the display:

Analyser ready

After this the analyser is ready for normal measurement or to be switched off
from the power supply.

Ultrasonic milkanalyser

4.2. Preparation of cleaning solution

4.2.1. Preparation of alkaline cleaning solution

Preparation of 1 % alkaline solution of Lactodaily for circulation cleaning in
the milk analyser:

1. Take the package 100 g concentrated powder chemical Lactodaily

2. Carefully cut the upper end, paying attention not to spill it.

3. In appropriate vessel (for example bucket) pour 1 l water.

4. Add the powder and then again water up to 10 l.

Then follow the instruction for milk analyser cleaning.

4.2.2. Preparation of acidic cleaning solution

Preparation of 1 % acidic solution of Lactoweekly for circulation cleaning in
the milk analyser:

1. Take the package 100 g concentrated powder chemical Lactoweekly

2. Carefully cut the upper end, paying attention not to spill it.

3. In appropriate vessel (for example bucket) pour 1 l water.

4. Add the powder and then again water up to 10 l.

Then follow the instruction for milk analyser cleaning.

For final cleaning with the syringe it is recommended to use 1% acidic
solution of Lactoweekly, preliminary heated up to 70 ˚C.

Fig. 7 Labels for acidic cleaning chemical Lactoweekly and alkaline
cleaning chemical Lactodaily

Ultrasonic milkanalyser

4.3. Working with the peristaltic pumps

There are two peristaltic pumps in the analyser – 1 for the sample and 1 for
the cleaning.

Fig.8 Peristaltic pumps

Ultrasonic milkanalyser

Fig. 9 Peristaltic pump SL 16

Ultrasonic milkanalyser

5. POSSIBLE MALFUNCTIONS AND ERROR MESSAGES,
TROUBLESHOOTING

In the table below are described the possible malfunctions during the milk
analyser’s exploitation and ways for their repair/remedy. If the problem
persists after all recommended measures are taken, please, connect the
nearest service center.

Error

message

MA

overheated

Accompanied

by a

continuous

sound signal

Empty

Camera

Sample

Overheat

Possible

problem /cause

Overheated milk

analyser

Insufficient

quantity of the

milk sample

sucked in the

system or air in

the sample

Sucked

overheated

sample

Repair/remedy

Immediately switch off the analyser.
Pay attention the analyser to be situated away from
direct sunlight or heating devices.
Wait 5-10 minutes the device to cool down or to be
normalized the ambient temperature and switch it on
again.
The analyser is ready to measure the next sample.
In order to avoid the future appearance of the same
error message, please, check the following:

- The sample is prepared according the
instructions and there aren’t air bubbles in it.

- There is a real suction of the sample after
starting measurement, i.e. it is obvious that the
level of the milk sample in the sample holder
decreases. In other case – there is damage in
the suction system.

- Avoid the end of the suction pipe to be above
the surface of the liquid (not dipped enough).

- Avoid curdling of the milk sample. Clean
immediately if there is a sample curdled in the
system.

- In mode Measurement, after starting the
measurement, remove the sample holder and
see if there is no milk poured back in the
sample holder.

The analyser is ready to measure the next sample.
In order to avoid the future appearance of the same
error message, please, check the following:

-The sample is prepared according the instructions

and its temperature does not exceed the maximum
permissible sample’s temperature.

-Complete the procedure for checking the analyser

in case of error message Empty Camera.