LABEC M-MIA-A User Manual

INSTRUCTION MANUAL

Laboratory Equipment Pty Ltd email: sales@labec.com.au Ph: 02 9560 2 811 • Fax: 02 9560 61 3 1

www.labec.com.au

2014

Ultrasonic milk analyser

0,$-A

MILK ANALYZER

LCD display – 4 lines x 16 characters

Operation manual

Ultrasonic milk analyser

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 the device, information contained in this manual is subject to change without notice. Contact the company-producer

for revisions and corrections

MRC Ltd

OFFICES: HAGAVISH 3, HOLON 58817

P.O.B. 111, HOLON 58100, ISRAEL TEL: 972-3-5595252 FAX: 972-3-5594529

Ultrasonic milk analyser

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 milk analyser

PARTS AND ACCESSORIES

In the table below the standard delivery configuration of the milk analyzer is listed: № Description

Item № pcs

1. Ultrasonic portable milk analyzer

LSSA001

1 sample measurement time

2. Operation manual

3. Plastic sample holder

4. Spare Pipes

5. 12 V DC Power Supply Cable

90 sec.

60 sec

30 sec

LSSA002

LSSA003

LSSA004

LSSA005

6. Alkaline cleaning solution Lactodaily 100 g 1

7. Acidic cleaning solution Lactoweekly 100 g 1

In the table below the milk analyzer 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):

1 2

2 1

8. RS232 Interface Cable - Analyser-IBM PC

9. Service Pack - CD

10. Handle

11. pH measuring system

12. pH probe with cable and holder

13. Buffer solution Ph 60 ml

LSSA006

LSSA007

LSSA008

LSSA009

LSSA010 LSSA011

(pH7.00±0.01/20˚C)

14. Buffer solution pH 60 ml

LSSA012

(pH4.00±0.01/20˚C)

15. Milk conductivity measuring system

16. Buffer solution conductivity 50 ml (5.02

LSSA013

LSSA014

(±5%) mS/cm (18±0.1˚C)

17. Real time clock

LSSA015

1 1 1

Ultrasonic milk analyser

18. High-fat measuring function

19. ECS POS Serial Printer

20. 12 V Serial Printer Power Supply Cable

21. RS232 Interface Cable - Milk Analyser – Serial Printer

22. Carrying case – plastic

LSSA016

LSSA017

LSSA018

LSSA019

LSSA020

1 1

1 1 23. Plug type

Ultrasonic milk analyser

2. TECHNICAL PARAMETERS

2.1. Working modes characteristics:

The program of the milk analyzer 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 UHT 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 milk analyser

2.2. Measuring range:

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

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

Density ** ………………………. ……...…….from 1000 to 1150 kg/m Proteins …………………………. ………………………..from 2% to 7% Lactose ………………………... …………………from 0.01 % to 20 % Water content ………………… ……………...……..from 0 % to 70 %

Temperature of milk …………… from 1

C to 40oC (if measurement is

30 sec, then t° is from 15 to 40°)

Freezing point ****……………… …………..from – 0,400 to – 0,700

C 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

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

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 milk analyser

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]

2.4 Correct ambient conditions:

Accuracy is guaranteed in case of normal ambient conditions:

Air temperature………………………… ….…from 10

C to 40oC (43 oC) Relative humidity ……………………… ……………...from 30% to 80% Power supply ………………………… …………………...220V (110V)

extent of contamination at normal environmental conditions…………..2

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.

2.5. Dimensions: ……………………………..240/220/100 mm, mass 3,0 kg

2.6. Continuous working time:……………………………………… non-stop

2.7 Milk sample volume per one measurement: ……….15 cm3 (= 25 ml)

Ultrasonic milk analyser

fig.1 Front panel

1. Display 6. Input pipe

2. Button “down” 7. Hanger

3. Button “Enter” 8. Sample holder

4. Button “up”

Ultrasonic milk analyser

fig. 2 Back panel

9.12 V Power supply input 15. Serial interface RS232

10. pH-probe ∅12 Holder (option)

16. 12 V printer output

11. pH-probe (option) 17. Waste solution output pipe orifice

12. Handle (option) 18.Cleaning solution input pipe orifice

13. pH-meter input (option) 19. Power switch

14. Serial printer connector 20. Switching adapter

Ultrasonic milk analyser

Fig 3. Principle working scheme

Ultrasonic milk analyser

Fig. 4 Connecting peripheral devices

Ultrasonic milk analyser

Fig. 5 Cables description

90-1801-0008

RS232 Interface Cable - Milk Analyser – Serial Printer

90-1801-0010

RS232 Interface Cable - Milk Analyser – IBM PC

2. TxD

3. RxD

5. GND

Milk Analyser DB 9-pin

male

DB 9-pin

female

2. Receive Data (RxD)

3. Transmit Data (TxD)

5. Signal Ground

(GND)

90-2001-0001

Probe pH with cable

90-1801-0009

DC 12V Power Supply Milk Analyzer Cable

1. GND

2. No connection

3. No connection

4. 12V DC

Ultrasonic milk analyser

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 analyzer for working mode

3.2.1.1. Put the analyzer 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 10-30

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 rating plate of the analyzer. Connect the switching adapter.

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:

Milkanalyzer xxx LCD vers xx MA vers yy MA ser. N. xxxx

where:

Milkanalyzer 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 – written on the rear panel of the

analyzer.

Ultrasonic milk analyser

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 analyzer 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 the display shows: “Ready to start”.

The analyzer 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 cleaning

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

3.2.2. Making analyses

To start measurement:

- pour the preliminary prepared sample in the sample holder of the analyzer;

- put the sample holder in the recess of the analyzer;

- press the button Enter.

Ultrasonic milk analyser

The analyzer sucks the milk, makes the measurement and returns the milk in the waste liquid reservoir. During the measurement the temperature of the sample is shown on the display. Ignore the results received immediately after switching on the analyzer 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:

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;

Ultrasonic milk analyser

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 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 analyzer is connected to a computer or a printer, it sends the data to the computer or prints them.

Ultrasonic milk analyser

4. CLEANING THE ANALYZER

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.

4.1. Automatic cleaning the analyzer

Analyzer'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 analyzers with peristaltic pump is embedded automatic cleaning. For this purpose the analyzer has to be prepared on the following way:

Fig.6 Additional pipe to the input pipe for

94 - additional pipe, connected towards input pipe

automatic cleaning

Please, pay attention to the additional pipe, connected towards the input pipe. It has to be long enough to suck all the content in the glass, but to be bent in order not to impede the pump function.

Ultrasonic milk analyser

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 the scheme:

Fig.7 Connecting the reservoirs towards the milk analyzer

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!

1 - cleaning solution input 2 - used samples and used cleaning solution output

Description of the cleaning procedures: There are two ways of cleaning the analyzer embedded in it – current and end (final) cleaning.

4.1.1. Current cleaning.

4.1.1.1. Automatic start

Ultrasonic milk analyser

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.

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 analyzer'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. It is filled to the middle and then is sucked back and poured in the reservoir with the used liquids. If there wasn't glass before the start of the automatic cleaning and if you do not replace it or put an empty glass then the cleaning solution will be poured in front of the device.

After the cleaning is finished the displays shows the following:

End of cleaning

After 2 seconds the display shows:

Ultrasonic milk analyser

Analyzer 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. It is started using the menu for choosing the working mode of the analyzer. 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.

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.

Ultrasonic milk analyser

4.1.2. End (final) cleaning.

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

4.2.2.). It is daily. Serves for cleaning the protein deposits from the measuring system of the analyzer, which were not removed during work with the alkaline cleaning solution.

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.

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

After choosing the final cleaning, the following message appears on the display:

Put filled with

Water glass

and press Enter

to Continue

Ultrasonic milk analyser

The operator has to put a glass filled with water and to 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

The operator has to pour alkaline solution in the glass and to press the button Enter, in order to continue the cleaning. Then the following message appears on the display:

Cleaning

Please wait

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.

Ultrasonic milk analyser

Follows rinsing with water:

The operator has to 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:

Analyzer ready

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

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 analyzer:

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 analyzer cleaning.

4.2.2. Preparation of acidic cleaning solution

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

1. Take the package 100 g concentrated powder chemical Lactoweekly

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

Ultrasonic milk analyser

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 analyzer cleaning.

Fig. 8 Labels for acidic cleaning chemical Lactoweekly and alkaline cleaning chemical Lactodaily

Ultrasonic milk analyser

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.9 Peristaltic pumps

Ultrasonic milk analyser

Fig. 10 Peristaltic pump SL 16

Ultrasonic milk analyser

5. POSSIBLE MALFUNCTIONS AND ERROR MESSAGES, TROUBLESHOOTING

In the table below are described the possible malfunctions during the milk analyzer’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

overheated

Accompanied

by a

continuous

sound signal

Empty

Camera

Sample

Overheat

Possible

problem /cause

Overheated milk

analyzer

Insufficient

quantity of the

milk sample

sucked in the

system or air in

the sample

Sucked

overheated

sample

Repair/remedy

Immediately switch off the analyzer. Pay attention the analyzer 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 analyzer 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.

- Check the pipe, connecting orifices for cleaning solution and waste liquid (on the analyzer’s rear panel.

- 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 analyzer 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 analyzer

in case of error message Empty Camera.

+ 71 hidden pages

LABEC M-MIA-A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual