MRC MIA-LA Operation Manual
Operation manual 1/92
MIA-LA
MILK ANALYZER
LCD display – 4 lines x 16 characters
Operation manual
Ultrasonic milkanalyser
Operation manual 2/92
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
3, Hagavish st. Israel 58817 Tel: 972 3 5595252, Fax: 972 3 5594529 mrc@mrclab.com
MRC.1.18
Ultrasonic milkanalyser
Operation manual 3/92
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
Operation manual 4/92
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
50 sec
30 sec
2.
Operation manual
3.
Plastic sample holder
LSLA003
1
4.
Spare Pipes
LSLA004
2
5.
12 V DC Power Supply Cable
LSLA005
2
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:
b) not included in the set (may be
additionally bought):
Item №
pcs
/
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
(pH7.00±0.01/20˚C)
LSLA011
1
13.
Buffer solution pH 60 ml
(pH4.00±0.01/20˚C)
LSLA012
1
14.
Milk conductivity measuring system
LSLA013
1
15.
Buffer solution conductivity 50 ml (5.02
(±5%) mS/cm (18±0.1˚C)
LSLA014
1
16.
Real time clock
LSLA015
1
17.
High-fat measuring function
LSLA016
1
Ultrasonic milkanalyser
Operation manual 5/92
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
LSLA019
1
21.
Power supply from embedded accumulator
with charger
LSLA021
1
22.
Plug type
1
1
23.
Spare O-ring for the pH probe
1
24.
USB flash drive option
1
Ultrasonic milkanalyser
Operation manual 6/92
1. FUNCTION
The function of the milk analyser is to make quick analysis of milk on
fat (FAT), non-fat solids (SNF), proteins, lactose and water content
percentages, temperature (oС), pH, freezing point, salts, total solids,
conductivity as well as density of one and the same sample directly
after milking, at collecting and during processing.
Ultrasonic milkanalyser
Operation manual 7/92
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
Note:
For devices with a 5 button keypad on the front panel by pressing the extra
buttons, you can run the following commands: Pressing the button labeled A start re-printing the results Pressing the button labeled B - start of flushing
(2.1.4.) These commands are possible when the unit is in Idle mode, i.e.
expecting command for measuring sample.
Ultrasonic milkanalyser
Operation manual 8/92
2.2. Measuring range:
Fat ……………….....................
…………..from 0.01% to 25% (45%*)
SNF ………………………………
...…………………....from 3% to 40%
Density ** ……………………….
……...…….from 1000 to 1160 kg/m3
Protein ………………………….
……………………..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 3 to 14 [mS/cm]
Total Solids *…………………….
………………………...from 0 to 50 %
* Option, on customers’ request
** Density data are shown in an abbreviated form. For example 27.3 have to
be understood as 1027.3 kg/m3. To determine the milk density, write down
the result from the display and add 1000.
Example: result 21,20; density = 1000 + 21,20 = 1021,2 kg/m3
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
Operation manual 9/92
2.3. Accuracy:
Fat …..………………………………..
…...………………….…... 0.06%
SNF …………………………………..
…………...………….…... 0.15%
Density ………………………………
……………………….. 0.3 kg/m3
Proteins ……………………………...
……...……………….…... 0.15%
Lactose ………………………………
.…………………………... 0.20%
Water content ……………………….
.……………………………. 3.0%
Temperature of milk ………………..
.……………………………… 1oC
Freezing point………………………..
..……...………………… 0.005oC
Salts ………………………………...
…..…………...…………... 0.05%
PH ………………………………….
………………………………±0.05
Conductivity ……………………….
……………………………...±0.05
Total solids ………………………….
…………………………… 0.17%
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:
………………………………..………..15 cm
3
(= 25 ml)
Ultrasonic milkanalyser
Operation manual 10/92
Fig.1 Front panel
1. pH probe & holder (option)
10. sample holder
2. Printer
11. ss grid
3. Display
12.waste liquid pipe
4-8 Buttons
13. USB flash-drive slot
9. input pipe
Ultrasonic milkanalyser
Operation manual 11/92
Fig.2 Back panel
1. pH probe (option)
6-7 connectors for the cleaning
solution/waste liquid
2. weight scales input (option)
8.DC Power Supply output
3. pH probe input (option)
9. Switching adapter
4. USB/RS232 (option)
10. Power switch
5. RS232/printer
11. DC Power Supply input
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Operation manual 12/92
Fig 3 Principle working scheme
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Operation manual 13/92
Fig. 4 Connecting peripheral devices
Ultrasonic milkanalyser
Operation manual 14/92
Fig. 5 Cable Description
90-1801-0008
RS232 Interface Cable - Milk Analyser – Serial Printer/ IBM PC
90-1801-0009
DC 12V Power Supply Milk Analyzer Cable
1. GND
2. No connection
3. No connection
4. 12V DC
There’s an option in the analyser – embedded USB interface (USB to
RS232 Serial Converter) for connection with computer type IBM PC. It is
intended for connecting computers from laptop type, which have no RS 232
interface (COM Ports – DB9 Connector). This option may be available
together with the standard RS232 – connector DB9, which always exists in
the analyzers. At one and the same time, connection analyzer – computer,
can be established only through one of the couplings – either only DB9, or
only USB, i.e. analyzer could not be connected at one and the same time,
using one of the interfaces with one and using the other interface to another,
second computer. The coupling for this option (Printer Type) is at the back of
the analyzer, next to the standard RS232 DB9 connector. Other USB devices
like printers, keypads etc COULD NOT be connected to this coupling.
Ultrasonic milkanalyser
Operation manual 15/92
USB interface is based on the element MCP2200 of the company
Microchip Technology Inc. – site: http://www.microchip.com. For establishing
a connection through this interface a driver has to be installed for MCP2200
in the correspondent computer, which will be connected with the analyzer.
Please, follow the procedure, from the Internet site of the producer:
http://www.microchip.com/wwwproducts/devices.aspx?ddocname=en546923,
by choosing the suitable for your operation system driver.
After installing the driver, choose the СОМ port, which will be used for
the real communication. For Win XP it is done by executing the following
commands: Start -> Settings -> Control panel -> System -> Hardware ->
Device Manager -> Ports (COM and LPT) – Right Click -> Properties -> Port
Settings -> Advanced -> COM Port Number. Choose Number 1 or if another
number is chosen, for example 3, then, when working with the software tools,
in the field COM Port (upper right corner), you have to set the new number of
the port, in this case 3.
Ultrasonic milkanalyser
Operation manual 16/92
3. QUALIFICATION OF RAW MILK, THERMALLY TREATED
MILK, OTHER DAIRY PRODUCTS AND DERIVATIVES
3.1. Taking samples and preparation for analysis
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 10-40oC.
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:
Milkanalyzer xxx
Vers: yy dd-mm-yy
Ser. N. xxxx
Where:
Milk analyser xxx - name of the analyzer, type and time for
measurement.
Vers: yy dd-mm-yy – motherboard software version, date for the version
ser. N. xxxx - serial number .
This information is called informational identity (Identity) of the analyser
Ultrasonic milkanalyser
Operation manual 17/92
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 analysis 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 analysis
Ultrasonic milkanalyser
Operation manual 18/92
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
Operation manual 19/92
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
s=0.sss A=aa.aa
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;
aa.aa - measured total solids
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.
Ultrasonic milkanalyser
Operation manual 20/92
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 conductivity 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
Operation manual 21/92
4. CLEANING THE ANALYSER
Fig. 7 Connecting the container with detergent
1. Connector for the cleaning solution
4. Vessel for waste solution
2. Connector for the waste liquids
5. Vessel for the cleaning agent
3. metal pipe
Ultrasonic milkanalyser
Operation manual 22/92
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). They can be
ordered 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 equipment by one the companies,
producing such chemicals, as for example:
http://www.diversey.com
http://www.ecolab.com
http://www.calvatis.com
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 has 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.7.
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:
There are two ways of cleaning the analyser embedded in it – current and
end (final) cleaning.
Ultrasonic milkanalyser
Operation manual 23/92
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
intervals 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.
*Idle Mode is that part of the standard working mode, when the analyser is
not making measurements. There’s embedded in the analyser system for
measurement of the idle time. The idle time is measured starting from the last
action of the operator. In dependence of it (what the operator last did), are
taken decisions regarding the cleaning.
There are 2 options:
Option A: If the analyser:
1. Was only switched on but was not started in measurement mode,
2. Or the last action was cleaning,
3. Or the last action was measuring sample with very low Fat (similar to
water)
Then the automatic cleaning is started after 55 min.
Option B: If the last thing done with the analyser was measurement of normal
milk sample, the automatic cleaning is started after 15 min.
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:
Ultrasonic milkanalyser
Operation manual 24/92
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.
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.
Ultrasonic milkanalyser
Operation manual 25/92
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.
4.1.2. End (final) cleaning.
4.1.2.1. Final cleaning.
It is done with 3% 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.
Ultrasonic milkanalyser
Operation manual 26/92
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
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.
3. The hose from the Waste pipe has to be placed in the vessel for waste
liquids.
Ultrasonic milkanalyser
Operation manual 27/92
Fig 8. Rinsing with water
3. 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:
Ultrasonic milkanalyser
Operation manual 28/92
Glass Alcal Deterg
Waste pipe Glass
press Enter
5. Place glass filled with alkaline cleaning solution.
6.The pipe, coming from the orifice with inscription Waste Pipe has to be
placed in the glass.
Fig 9. Cleaning
7. Pressing button Enter starts the procedure for cleaning with alkaline
solution.
The following appears on the display:
Where, changing number shows number of cycles done by the pump.
Cleaning: 1
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