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
4, Narodni Buditeli Str.
8900 Nova Zagora
BULGARIA
Phone/Fax: + 359 457 67082
e-mail: office@lactoscan.com
www.lactoscan.com
www.milkotronic.com
Operation manual 11.04.19 2/110
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 suc h be f ore 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 electri cal network in such a wa y that the power cable
to stay away from the side for accessing the device and not to be
stepped on.
5. Every time before cleani ng the device swit ch 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 malfunct ion 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.
Operation manual 11.04.19 3/110
Ultrasonic milk analyser
№
Description
Item №
pcs
1.
Ultrasonic portable milk analyzer
LSSA001
1
50 sec
30 sec
Operation
manual
LSSA00
2.
Plastic sample holder
LSSA003
1
3.
Spare Pipes
LSSA004
2
4.
12 V DC Power Supply Cable
LSSA005
2
5.
Alkaline cleaning solution Lactodaily
100 g
1
6.
Acidic cleaning solution Lactoweekly
100 g
1
№
Description
not included in the set (may be
Item №
pcs
7.
RS232 Interface Cable - Analyser-IBM PC
LSSA006
8.
Service Pack - CD
LSSA007
9.
pH measuring system
LSSA009
1
10.
pH probe with cable and holder
1
11.
Buffer solution Ph 60 ml
(pH7.00±0.01/20˚C)
LSSA011
1
12.
Buffer solution pH 60 ml
(pH4.00±0.01/20˚C)
LSSA012
1
13.
Milk conductivity measuring system
LSSA013
1
14.
Buffer solution conductivity 50 ml (5.02
(±5%) mS/cm (18±0.1˚C)
LSSA014
1
15.
Real time clock
LSSA015
1
16.
High-fat measuring function
LSSA016
1
17.
ECS POS Serial Printer
LSSA017
1
PARTS AND ACCESSORIES
In the table below the standard delivery configuration of the milk analyzer is
listed:
1 sample measurement time
2
In the table below the milk analyzer spares and accessories, which are
delivered on customers request are listed:
a) included in the set:
b)
additionally bought):
LSSA010
/
Operation manual 11.04.19 4/110
Ultrasonic milk analyser
18.
12 V Serial Printer Power Supply Cable
LSSA018
1
19.
RS232 Interface Cable - Milk Analyser –
Serial Printer
LSSA019
1
20.
Carrying case
LSSA020
1
21.
Plug type
1
1
22.
Spare O-ring for the pH probe
1
23.
USB flash drive (slot)
1
Operation manual 11.04.19 5/110
Ultrasonic milk analyser
1. FUNCTION
The function of the milk a na lyzer is to make quick analysis of mil k on f a t
(FAT), non-fat solids (SNF), proteins, lactose and water content
percentages, temperature (
conductivity as well as density of one and the same sample directly
after milking, at collecting and during processing.
o
С), pH, freezing point, salts, total solids,
Operation manual 11.04.19 6/110
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
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.
Operation manual 11.04.19 7/110
Ultrasonic milk analyser
Fat ………………........... .. ........
…………..from 0.01% to 25% (45%*)
SNF ………………………………
...…………………....from 3% to 40%
Density ** ……………………….
……...…….from 1000 to 1150 kg/m3
Proteins ………………………….
………………………..from 2% to 7%
Lactose ………………………...
…………………from 0.01 % to 20 %
Water content …………………
……………...……..from 0 % to 70 %
Temperature of milk ……………
from 1oC 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 %
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%
2.2. Measuring range:
* 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
3
. 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/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.
extent of contamination at normal
environmental conditions
…………………….…………..2
2.4 Correct ambient condit ions:
Accuracy is guaranteed in case of normal ambient conditions:
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 ti m e : ………………………………………non-stop
2.7 Milk sample volume per one measurement: ………..15 cm3 (= 25 ml)
Operation manual 11.04.19 9/110
Ultrasonic milk analyser
1. pH probe(option)
10. Sample holder
2. printer (option)
11 Input pipe
3. keypad (option)
12. Hanger
4. Display
13. USB f lash drive (slot)
5-9. Buttons
Fig.1 Front panel
Operation manual 11.04.19 10/110
Ultrasonic milk analyser
1. keypad (option)
8. Serial printer interface/RS232
2. Printer (option)
9. Waste solution output pipe orifice
3. pH-probe (option)
10. Cleaning solution input pipe orifice
4. Weigh Scale input (option)
11. Switching adapter
5. AC adaptor input
12. Power switch
6. DC Power Supply output
13. pH-meter input (option)
7. USB (option)
fig. 2 Back panel
Operation manual 11.04.19 11/110
Ultrasonic milk analyser
Fig 3 Principle working schem e
Operation manual 11.04.19 12/110
Ultrasonic milk analyser
Fig. 4 Connecting peripheral de vi ce s
Operation manual 11.04.19 13/110
Ultrasonic milk analyser
Fig. 5 Cables description
90-1801-0008
RS232 Interface Cable - Milk Analyser – Serial Printer/ IBM PC
The connection of the analyser with other devices via RS232 Interface is
made through the coupling DB9 on the back panel of the device. In it can be
plugged only the cable, supplied by the producer with the analyser (or
produced by the customer as per above scheme). The coupling from the
cable, marked on the scheme with „TO LACTOSCAN” must be plugged in the
computer. If due to some reason is used an external cable USB to RS232
Converter (usually when working with a laptop the customers buy such
cables from the market), it must be plugged in the coupling “TO PC” of the
original cable, not directly in the device.
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
Operation manual 11.04.19 14/110
Ultrasonic milk analyser
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. Ot her USB devices
like
printers, keypads etc COULD NOT be connected to this coupling.
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:
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.
Operation manual 11.04.19 15/110
Ultrasonic milk analyser
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 a na lyzer 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:
o
C.
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.
Operation manual 11.04.19 16/110
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 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 cleaning
Using “up”▲and ”down”▼buttons, choose the working mode and press Enter
in order to start it.
3.2.2. Making analysis
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.
Operation manual 11.04.19 17/110
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 r e s ult s
3.2.3.1. When the measurement is finished, the sample returns in the
sample-holder and the display shows the results. For example:
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:
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
Operation manual 11.04.19 18/110
Ultrasonic milk analyser
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
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.
Operation manual 11.04.19 19/110
Ultrasonic milk analyser
Time: xx:xx:xx
Conduct.(mS/sm)…………..xx.xx
Fig. 6 Printing the results
For more information for the printer see 8.2. Working with Printer.
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 equipment by one the companies,
producing such chemi ca l s , as for example:
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.7 Additional pipe to the input pipe for
automatic cleaning
94 - additional pipe,
input pipe
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.
Operation manual 11.04.19 21/110
Ultrasonic milk analyser
Pay attention to the
ith 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
Pay attention to the level of
the cleaning solution in the
reservoir. Add solution when
used samples and used
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.8 Connecting the re s er voi rs towards the milk analyzer
pipes in both reservoirs. The
pipe in the reservoir w
dipped in the liquid.
the level is below 2/3!
1 - cleaning solution input
2 cleaning solution output
Description of the cleaning procedures
There are two ways of cleaning the analyzer embedded in it – current and
end (final) cleaning.
Operation manual 11.04.19 22/110
:
Ultrasonic milk analyser
4.1.1. Current cleaning.
4.1.1.1. Auto matic start
The current cleaning is made with 3% 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.
*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.
The display shows the following message and a sound signal is emitted:
Auto clean
started!
Put empty glass
After this the cleaning i s started. The display shows:
Operation manual 11.04.19 23/110
Ultrasonic milk analyser
Cow
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:
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.
Sheep
UHT
Cleaning
Final Clean
Operation manual 11.04.19 24/110
Ultrasonic milk analyser
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.
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!
Operation manual 11.04.19 25/110
Ultrasonic milk analyser
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.
4. 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:
Operation manual 11.04.19 26/110
Ultrasonic milk analyser
Cleaning: X
Glass Alcal Detrg
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:
Operation manual 11.04.19 27/110
Ultrasonic milk analyser
Glass Acid Detrg
End of Cleaning
Cleaning: X
Where, X is changing number showing number of cycles done by the pump.
8. After the cleaning procedure is finished, the following message appears,
reminding the analyzer needs rinsing.
9. Rinsing procedure is executed, described in p. 2. After it is finished, the
display shows:
Waste pipe Glass
press Enter
10. Place glass filled with acidic cleaning solution.
11. The pipe, coming from the orifice with inscriptionс Waste Pipe has to be
placed in the glass.
12. Pressing button Enter starts the procedure for cleaning with acidic
solution.
The following appears on the display:
Where, X is changing number showing number of cycles done by the pump.
13. After the c leaning procedure is finished, the following message appears,
reminding the analyzer needs rinsing.
14. Rinsing procedure is executed, described in p. 2. After it is finished, the
display shows:
Ready to Start
15. Procedure Final Clean is finished.
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:
Operation manual 11.04.19 28/110
Ultrasonic milk analyser
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.
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.
Operation manual 11.04.19 29/110
Ultrasonic milk analyser
4.2. Preparation of cleaning s olution
For a single cleaning cycle you need only 25 ml cleaning solution. We
recommend you to prepare working solutions of cleaning chemicals, enough
for normal work for 1 week, because, during their stay unused, the working
solutions loose their strength and also is difficult to store them.
Preparation of 3 % alkaline solution of Lactodaily for circulation cleaning in
the milk analyser:
1. Take the package concentrated chemical Lactodaily
2. In appropriate vessel (for example bucket) pour 1 l water.
3. Add the chemical and then again water up to 3 l.
Then follow the instruction for milk analyser cleaning.
4.2.2. Preparation of acidic cleaning solution
Preparation of 3 % acidic solution of Lactoweekly for circulation cleaning in
the milk analyser:
1. Take the package concentrated chemical Lactoweekly
2. In appropriate vessel (for example bucket) pour 1 l water.
3. Add the chemical and then again water up to 3 l.
Then follow the instruction for milk analyser cleaning.
Fig. 10 Labels for acidic cleaning chemical Lactoweekly and alkaline
cleaning chemical Lactodaily
The following procedure is executed:
1. Rinsing the milk residues:
Fill in the glass with water. Put it in the recess of the analyser and start
command Cleaning from the main menu. After finishing it pour out the
contaminated water.
Operation manual 11.04.19 30/110
Ultrasonic milk analyser
repair has to be paid.
2. Cleaning with acidic solution
Fill in the glass with warm (50-60 С) acidic cleaning solution. Put it in the
recess of the analyser and start the command Cleaning from the main menu.
After finishing it, pour out the contaminated liquid.
3. Rinsing with water
Fill in the glass with water. Put it in the recess of the analyser and start
command “Cleaning” from the main menu. After finishing it pour out the
contaminated water. Now the device is ready for work.
Please, pay attention that, when the analysers gives a signal for need of
cleaning 15 min after the last measurement of real milk samples or 55 min.
after being powered and not used, cleaning is made ONLY with alkaline
solution in concentration 1-3%.
During the basic/final cleaning sequence is: alkaline solution – water – acidic
solution - water
IMPORTANT
THE MAIN REASON FOR MALFUNCTIONING OF THE
DEVICE IS THE BAD CLEANING OF THE SYSTEM AFTER
MAKING ANALYSIS.
In case of malfunction due to the bad cl e a ning of t he
analyser your guarantee is not valid anymore and any
Operation manual 11.04.19 31/110
Ultrasonic milk analyser
4.3. Working with the peris t al t ic pumps
There are two peristaltic pumps in the analyser – 1 for the s ample and 1 for
the cleaning.
Fig.11 Peristaltic pumps
Operation manual 11.04.19 32/110
Ultrasonic milk analyser
Fig. 12 Peristaltic pump SL 16
Operation manual 11.04.19 33/110
Ultrasonic milk analyser
Error
message
Possible
problem /cause
Repair/remedy
2. MA
sound signal
Immediately swi tc h off the analy z er .
again.
The analyzer is ready to measure the next sample.
The sample is prepared according the
milk sample in the sample holder
there is damage in
Avoid the end of the suction pipe to be above
Avoid curdling of the milk sample. Clean
a sample curdled in the
In mode Measurement, after starting the
measurement, remove the sample holder and
k in the
sample holder.
The analyzer is ready to measure the next sample.
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.
overheated
Accompanied
by a
continuous
3. Empty
Camera
Overheated milk
analyzer
Insufficient
quantity of the
milk sample
sucked in the
system or air in
the sample
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
In order to avoid the future appearance of the same
error message, please, check the following:
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
decreases. In other case –
the suction system.
the surface of the liquid (not dipped enough).
immediately if there is
system.
- Check the pipe, connecting orifices for cleaning
solution and waste liquid (on the analyzer’s rear
panel.
-
Sucked
4. Sample
Overheat
Operation manual 11.04.19 34/110
overheated
sample
see if there is no milk poured bac
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.
Ultrasonic milk analyser
6. MAKING CORRECTIONS AND RECALLIBRATION OF THE
DEVICE
In the process of work with the analyser there is a possibility the results to
start differing between the data for some of the measuring parameters when
measured with the milk analyzer and the corresponding reference method of
analysis (Gerber for fat, Kjeldhal for proteins etc). In order to establish the
possible discrepancy and to correct the readings of the milk analyser do the
following:
6.1. Taking samples and pr e par a ti on of s a m ples for checking the
accurracy of the milk analyser, making corrections and
recalibration
This is a basic moment for the correct checking the accuracy of the analyser
and for making correct and precise correction and calibration. It is
accomplished according Appendix Sampling and preparation of samples for
verification the accuracy of the milk analyzer, making corrections and
recalibration.
6.2. Determination the type of the discrepancy:
6.2.1. Making measurements
Make measurements with different samples (not less than 3) with known
values of a separate parameter (for example fat content), determined by the
known reference methods of analysis (for example Gerber's method for
determination of fat content). For more accuracy it is recommended among
these samples to be also such with values, close to the lowest and highest
bounds for the measured parameters.
Make 5-time measurement for each of the samples. Calculate the average
value for each sample parameter, without taking into consideration the first
measurement for each sample.
6.2.2. Analysing the measurement results
Make comparison between the values of the parameter from the reference
sample and measured with the analyser. Make analysis of the difference
received.
6.2.2.1. If the received differences are relatively constant value for samples
with different content of the analysed parameter, it is necessary to make
correction.
Operation manual 11.04.19 35/110
Ultrasonic milk analyser
Parameter
Increasing
Decreasing
Step
FAT
0.95%
0.95%
0.01%
SNF
4.75%
4.75%
0.05%
Density
4.75%
4.75%
0.05%
Lactose
0.95%
0.95%
0.01%
Salts
0.95%
0.95%
0.01%
Proteins
0.95%
0.95%
0.01%
Added water
9.00%
9.00%
1.00%
Sample’s temperature
9.90oС
9.90oС
0.1oС
For example
М% of the reference samples: 2,20 3,00 3,80 4,60 5,20
М%average when measuring
with the analyser:
2,38 3,17 4,01 4,79 5,42
Difference: 0,18 0,17 0,21 0,19 0,22
Conclusion: the difference is relatively constant value and correction is
possible to be done with – 0,2 % (see Corrections, p6.3.3)
6.2.2.2. If the differences are not a constant value it is necessary recalibration
to be done.
For example.
М% of the reference samples: 2,20 3,00 3,80 4,60 5,20
М% when measured with the
analyser:
2,02 2,93 3,76 4,75 5,44
Difference: -0,18 -0,07 -0,04 0,15 0,24
Conclusion: It is obvious that the difference is variable value and
recalibration have to be done (See Recalib ration, p.6.4).
6.3. Making corrections
6.3.1. Possible corrections, limits and changing steps
Every parameter from each calibration may be separately corrected. Below is
the table with possible corrections, limits and changing steps:
Operation manual 11.04.19 36/110
Ultrasonic milk analyser
Corrections:
6.3.2. Preparing the a na lyzer for mode Corrections
6.3.2.1. Press the button Enter and without releasing it switch on the power
supply of the device, wait for the starting identification messages and release
the button after the following message appears on the display:
Release button
to start setup
After releasing the button on the display is shown:
Setup Menu
followed by possible to be entered by the operator menus:
6.3.2.2. By using buttons “up” ▲ and “down” ▼position on Corrections and
press Enter.
6.3.3. Making correction
6.3.3.1 Determining t he c orrection mode
When starting Corrections, the following appears on the display:
Special modes
Corrections
Setting
s
-----------------------------Tests
pH & Co Meter
Accessories
Exit
Measurement
Temperature
Cond measure
Exit
Operation manual 11.04.19 37/110
Ultrasonic milk analyser
Cal1 Cow
Position on Measurement and press Enter. By using buttons “up”▲ and
”down”▼position on the corresponding calibration (for example Correction 1
– cow) and press Enter.
6.3.3.2. Choosing correction parameter
After choosing calibration mode the display shows the following:
Param:Fat
Correct=00.00
Edit OK Next
Using the buttons “up”▲ and ”down”▼position on the action you want to take
(for example Edit) and press the button Enter.
6.3.3.3. Making correc t ion
After choosing parameter (for example fat) the display shows the following:
Using the buttons “up”▲ and ”down”▼is possible to increase or decrease the
value of the measured parameter in the above pointed limits. Leaving this
mode means saving the correction value and activating it.
6.3.3.4. Making verifica tion
After the corrections are made put the milk analyser in working mode and
make several times measurement of reference samples with known values of
the corrected parameter. If the difference between the values of the
parameter from the reference methods and milkanalyser are in the limits for
the parameter it may be considered that the correction is successfully made.
If the discrepancy between the measurements from the milk analyser and
classical methods is bigger than is necessary to make second correction
according above described way.
If after the second correction the results are unsatisfactory we recommend
making a calibration of the analyser. In dependence of the conditions and
Cal:….
Param:….
Correct= 00,00
- OK +
Operation manual 11.04.19 38/110
Ultrasonic milk analyser
your requirements you may make the calibration using a personal computer
type IBM PC and the company's calibration program or autonomous - by
recalibration.
When making corrections or calibrations be 100% sure in the accuracy of the
reference methods result.
6.4. Recalibrating the milk analyser
6.4.1. Running the analyser in mode Recalibrate
6.4.1.1. Press the button Enter and without releasing it switch on the power
supply of the device, wait for the starting identification messages and release
the button after the following message appears on the display:
Release button
to start setup
After releasing the button on the display is shown:
Setup menu
Followed by the possible to be entered by the operator menus:
Special modes
Corrections
Setting
s
-----------------------------Tests
pH & Co Meter
Accessories
Exit
6.4.1.3. In the newly opened menu, position on Recalibrate and press the
button Enter.
Operation manual 11.04.19 39/110
Ultrasonic milk analyser
Cal: 1 Cow
Prev OK Next
Cal1 Cow
Edit OK Next
Cal1 Cow
- OK +
Cal1 Cow
Edit OK Next
6.4.2. Making recalibration
6.4.2.1. Choosing the calibration mode
After starting Recalibrate, the display shows the following:
You can choose the type of milk to be calibrated. By pressing
▼ (Next) you can
switch between Cal: 1, Cal: 2 or Cal: 3.
By pressing the button ОК you are choosin g t he type of calibration.
6.4.2.2. Entering values for the separate sample parameters
The following menu is displayed:
High
FAT=f.ff
In this display the results, received by using the corresponding reference
methods from Appendix Methods for
high-fat milk analysis must be
entered.
In this menu, with button ▼ (Edit) must be entered the values of the high fat
milk sample
For example:
FAT=05.29
High
FAT=f.ff
With buttons ▼(-),▲(+) set the needed value. With next pressing of Enter the
cursor is moved to the next number. After needed value entering completion for
FAT, press Enter(ОК) and you are going back to t he previous menu:
Operation manual 11.04.19 40/110
High
FAT=05.29
Ultrasonic milk analyser
Cal1 Cow
Edit OK Next
You Must Enter
Cal1 Cow
Edit OK Next
With the button ▲(Next), choose SNF and in the same as above
described procedure, enter the value for SNF. After it is finished, press
“Enter” (OK) and you are going back to the previous menu. With button
▲ (Next), choose DEN (density) and enter the value for density; the rest
of the parameters are entered in the same manner – LAC (lactose), SOL
(salts), PRO (protein)
High
PRO=f.ff
If you miss to enter some of the parameters of milk, the following warning
message will appea r:
Values > 00.00
Try Again
Then you must pres s the button Enter (ОК) and enter the missed parameters.
After all the paramet ers are entered, press Enter (ОК).
You must enter values for all the measured milk parameters!!!
The screen for entering the results, received with the corresponding
reference methods (See Appendix Methods) for the
low-fat milk is displayed:
Low
FAT=f.ff
In the same way the val ues of milk with low fat sample are entered.
You must enter values for all the measured milk parameters!!!
Operation manual 11.04.19 41/110
Ultrasonic milk analyser
Cal: Cow
Cow
In other case the cali brat ion will not be corre ct.
6.4.2.3. Making recalibration with the available samples
After entering the values for the separate parameters of the sample, pressing
Enter (OK) will display the following menu:
Cal: Cow
Put sample High
5 times
which reminds us to put 5 times the sample with high FAT.
The sample has to be with temperature in the boundaries 15-25°С.
Before each milk measurement stir 2-3 times the milk sample by pouring it
from one vessel to another. The needed quantity is poured in the sampleholder and it is put in the recess of the analyser. Start the measurement by
pressing the button Enter. The sample is sucked. Appears the following
menu:
Put sample: High
5 times
Temp=….
After the samp l e is measured, appears the following menu:
High
1=….. 2=…….
N
Cal meas=1/5
which reminds us to make the next measurement. Before each measurement
the milk is stirred by pouring it 2-3 times from vessel to vessel. Continue the
procedure till the 5th measurement.
Operation manual 11.04.19 42/110
Ultrasonic milk analyser
5 times
Cal: Cow
After 5th measurement completion automatically appears the menu, which
reminds us to place the
Low fa t milk sample:
Cal: Cow
Put Sampl: Low
Stir 2-3 times the milk sample before each measurement by pouring it from
one vessel to another. The needed quantity is poured in the sample-holder
and it is put in the recess of the analyser. Start the measurement by pressing
the button Enter. The sample is sucked. Appears the following menu:
Make 5 times measurement of the low FAT sample.
After 5th measurement completion automatically appears the menu:
Put sample: Water
5 times
Which reminds for 5-times water measurement.
After the 5
th
measurement appears the menu:
Recalibrated
Power Off-On
This means that the calibration was completed successfully and the analyzer
is recalibrated for cow milk, marked as “Cal: Cow”.
Switch off the power supply of the device and switch it on again.
The device is ready to work with the new calibration.
Next time when the analyser is switched on, it will be ready for work with
those milk types it was just calibrated with.
If calibration with another milk type is needed, do not forget to change the
calibration number for the new type of milk.
Calibration for Sheep milk will be saved as second calibration, UHT – as
third. This sequence may not be followed and calibrations can be saved in
whichever order is needed. Calibration can be done with different liquid dairy
products using 2 representative samples.
Checking the calibration
1. Switch on the calibrated device.
Operation manual 11.04.19 43/110
Ultrasonic milk analyser
2. Make sure it shows the same serial number as this already calibrated.
For checking, use the third sample with medium FAT content.
3. Measure the milk 5 times in the mode you’ve calibrated it.
In case that the device is not connected towards printer write down the
results.
4. Ignore the first two results.
The rest three could not differ more than 0,05% FAT, 0,07% SNF, 0,7%
Density one from another
Operation manual 11.04.19 44/110
Ultrasonic milk analyser
7. STARTING THE DEVICE IN A SERVICE TEST/SETUP
OPERATIONAL MODE. MENUS DESIGNATION
7.1. Starting the device in a service Test/Setup operational mode.
In order to start the Setup of the device the operator has to press the button
Enter and without releas ing it to switch on the power supply of the device, to
wait for the starting identification messages and to release the button after
the following message appears on the display:
Release button
to start setup
After releasing the button on the display is shown:
MA Setup
Followed by possible to be entered by the operator menus:
Special modes
Corrections
Setting
s
-----------------------------Tests
pH & Co Meter
Exit
You may move in the menus by using buttons “up” ▲ and “down” ▼.
If by pressing the button Enter you choose a menu, each menu offers new
points/submenus. When Exit is chosen the device leaves the Setup mode
and returns to normal work.
7.2. Menus Function:
7.2.1. Special modes.
Operation manual 11.04.19 45/110
Ultrasonic milk analyser
Serve for choosing special (technological) working modes. After starting it the
following appears on the display:
Special modes
Calibration
Cycle
Fast cycle
Exit
This mode is normally used in production conditions.
7.2.1.2. Calibration mode
In mode Calibration the analyzer is ready to make measurement and to send
the received results towards the technological milk analyzers calibration
system. For this purpose you need personal computer type IBM PC,
company’s calibration system LSC.EXE and methods for calibration of milk
analyzers (see the corresponding documents). To start measurement in this
mode, the operator has to put a sample-holder containing milk sample in the
recess of the analyzer and to press the button Enter.
7.2.1.2. Cycle mode / Fast cycle mode
Mode Cycle serves for training the analyzers. When you start this mode, the
analyzer, without additional commands, sucks the sample, makes the
measurement, pours the sample out in the sample-holder and displays the
received results cyclically.
7.2.2. Corrections
Serves for entering corrections in the measured data. Detailed description in
point 6.3.2 and 6.3.3.
7.2.3. Settings.
Serve for assigning different working parameters (modes).
7.2.3.1. Net number.
Serves for assigning the device network number when connecting it in the
production network. The possible numbers are from 0 to 15 including.
After starting this function the display shows the following:
Operation manual 11.04.19 46/110
Ultrasonic milk analyser
Save
Restore
Net number
0
- OK +
By using the button “up”▲ the operator has the possibility to increase the
number, showing the channel’s number, and by button “down”▼, to decrease
it. Pressing the button Enter saves the chosen channel and exits the function.
When connected in the production network each device has to have a unique
number.
7.2.3.2.Recalibrate.
Serves for changing definite calibration. Methods are described in point 6.4.
7.2.3.3. Save/Rest Cal.
Through this menu you may save the new calibration in the device or to
restore the old one (factory) calibration. This is necessary in case that you’ve
calibrated the device for cow milk, but after that the device is not measuring
correctly and you decide to restore the factory calibration settings. Position
the cursor across “Restore calibration” an d press “Enter”
Possibilities:
Save calibration – saves the chosen calibration in an internal buffer.
Restore calibration – restores the chosen calibration from the internal
buffer.
The procedure Save/Restore is done for each calibration separately.
Current working
calibration (1,2 or 3)
Internal storing
buffer
Current calibration content is not changed, the analyzer continues using it,
but there is a reserve copy in an internal buffer.
Current working
calibration (1,2 or 3)
Internal storing
buffer
Operation manual 11.04.19 47/110
Ultrasonic milk analyser
Exit
Large Results
The current calibration is replaced with the calibration from the internal buffer
and the analyzer starts working with it. The content of the internal buffer is not
changed.
If after recalibration “Save calibration” is pressed the new calibration
settings will be saved over the factory settings. After that is impossible
to restore the factory settings of the calibration. Save the newly made
calibration only if you are sure about its correctness.
7.2.3.4. Settings Page 2.
After this menu is started the display shows the f ollowing:
Settings Page2
Set Calibr Name
Select High Fat
HFSpeed for Cal
Result Precision
PCB Main Identi
Larg Res En/Dis
Now there is a possibility one of the follow ing opt i ons to be set:
7.2.3.4.1. Larg Res En/Dis.
The format of the measurement data send towards the c omputer is set.
If the option Large Disable, is chosen, then only the main results are send to
the computer – Fat, SNF, Density, Lac, Proteins, Added Water, sample
temperature, devi ce serial number and calibration num ber.
If the option Enable, is chosen, except the above mentioned parameters also
data for Salts, Freez ing Point, pH, Conductivity will be send to the computer. In
this case is necessary the software in the computer to be conformable to the
format of the sent dat a. After starting the menu, the display shows (for example):
Operation manual 11.04.19 48/110
Ultrasonic milk analyser
No
No OK Yes
7.2.3.4.2. Select High Fat
If the analyzer has embedded function for measurement of high fat products, by
this menu the calibration, with which this measurement to be made is chosen.
What is seen when this option is turned on is an obvious slowdown of the
sample’s suction speed.
7.2.3.4.3. HFSpeed for Cal
If the analyzer has embedded function for measurement of high fat products,
and a new calibration for high fat measurement is needed, before starting the
new calibration the operator has to start this menu. What is seen when this
option is turned on is an obvious slowdown of the sample’s suction speed during
calibration.
Please, pay attention to the fact that switching off the power supply cancels this
command action.
7.2.3.4.4. Reslt Precision
Serves for setting the precision of the measured results shown on the display. It
is set separately for every parameter, the precision could be 0.01 (standard) or
0.1.
7.2.3.4.5. PCB Main Identi
Gives information a bout the type and the version of the analy ser (LS I dentity).
7.2.3.4.6. Set Calibr Name.
Sets the names of the separate calibrations. The name could be chosen from
the group of predefined calibrations names or to edit a new one. When editing
the new name there is a possibility all ASCII codes to be used, as letters (caps
and normal), numbers and punctuation marks and popular symbols. The
calibration name consists of 8 symbols.
After starting this menu the display show s:
Select Calibr
Cal1: Sheep
Exit Yes Next
Operation manual 11.04.19 49/110
Ultrasonic milk analyser
There are the following possibilities:
With button Exit – to leave the menu.
With button Yes – to confirm the chosen for editing calib rat i on name.
With button Next – to choose the next calibration nam e for editing.
If a calibration for change or edit of name is chosen, the display shows
(example):
Cal:Sheep
PreDef Exit Edit
There are the following possibilities:
With button PreDef – to choose a calibration name from the list of preliminary
given names.
With button Exit – to leave the menu.
With button Edit – to edit the new calibration name.
If a name from the preliminary given names list is chosen, the display shows:
Cal1: Sheep
UHT
Exit Yes Next
There are the following possibilities:
With button Exit – to leave the menu.
With button Yes – to confirm the chosen from the list calibration name.Now the
program returns to the beginning of the menu for setting calibrati on names.
With button Next – to show the next calibration name from the li st.
If it is decided a new calibration name to be edited, the display shows:
Cal1: Sheep
User Edited
Name:
Prev Set Next
There are the following possibilities:
With button Prev – to display the previous ASCII symbol.
Operation manual 11.04.19 50/110
Ultrasonic milk analyser
With button Set – to confirm the ASCII symbol, shown on the display and
passes to editing th e next symbol from the cali bration name.
With button Next – to show the next ASCII symbol.
After editing the last (eighth) name symbol, the display shows:
Cal1: Sheep
User Edited
Name:MilkShp
Exit Save
There are the following possibilities:
With button Exit – to leave the menu.
With button Save – to confirm already edited calibration name and to save it in
the device. The program returns to the beginning of the menu for setting
calibration names.
7.2.3.5. Set Base FrPnt
Through this menu you have the possibility to enter the basic freezing point
separately for each calibration. For more information, see Appendix Freezing point. After choosing the menu the following is displayed:
After choosing freezing point for the calibration, the following is displayed:
FrPoint Calibrx
-0.fff
- OK +
Where:
Calibrx - basic freezing point to be edited for chosen calibration;
-0.fff - basic freezing point current value;
Operation manual 11.04.19 51/110
Ultrasonic milk analyser
By pressing the buttons:
“up”▲- you may increase the absolute value of the freezing point;
”down”▼- you may decrease the absolute value of the freezing point;
“Enter” - saves the edited value and exits the menu;
7.2.4. Tests.
Start different tests. Possibilities:
7.2.4.1. Test pump.
Starts pump’s test. The number of the completed suction/display cycles is
indicated.
7.2.4.2. Ultrasound.
Test for the ultrasonic system. Used in production conditions.
7.2.4.3. Set Amplitude.
Serves for ultrasound amplitude adjustment. It is used under production
conditions or by the customer (after sensor change) according the
instructions in the document SetCell.pdf.
7.2.4.4. RS232 COMPort
7.2.4.5. Keypad
7.2.4.6. USB Flash
Please, use this menu only after reading the above pointed document
SetCell.pdf
7.2.5. pH meter & Co meter
Ph and conductivity measuring are additional possibilities for the analyser
and are optional. Their usage is described in Appendices PH Measurement
and Conductivity Measurement.
Operation manual 11.04.19 52/110
Ultrasonic milk analyser
Special
modes
Calibration
Shut Down
Corrections
Calibration 1
Fat
Water
Calibration 2
Fat
Water
Calibration 3
Fat
Water
Temperature
Cond
measure
Settings
Net number
LCD Setup
Contrast fast
B.Light fine
Recalibrate
7.2.6. Exit
By pressing the button you may leave the program and pass towards another
menu.
Save Calibr 2
Save Calibr 3
Rest Calibr 1
Rest Calibr 2
Offs
Settings
Auto Print Res
Larg Res En/Dis
Set Calibr Name
Speed for Cal 2
Speed for Cal 3
HFSpeed for Cal
Precision
SNF - Precision
Den - Precision
Lac - Precision
Sol - Precision
Pro - Precision
Operation manual 11.04.19 54/110
Ultrasound
Ultrasonic milk analyser
KeyPad
Parallel Prn
pH & Co
Meter
pH
En/Dis
Accessories
Weight scale
Raw Test
On Line En/Dis
Battery
Measure Bat U
Ctrl Enabl/Dis
RT Clock
Display Time
Adjust Date
Displays
Calibration
pH
Measuring
pH
En/Disable
pH U Display
pH Test U[V]
Co Meter
Calibr
Co Meter
Test
Co Meter
Calibration
Measure
Adjust Time
Operation manual 11.04.19 55/110
Ultrasonic milk analyser
8. ENTERING DATA WITH THE KEYPAD AND PRINTING OUT
THE RESULTS
8.1. Working with the keypad
To make the operation easier there is embedded keypad in the device.
Via it one may enter 4 digit number of the milk supplier (from 1 up to 9999)
and the delivered by this milk supplier liters of milk (from 0.1 up to 9999.9
liters) with accuracy up to 0.1 l.
Entering these data is done before starting the measurement. For that
purpose:
1. Pr ess the button # (Enter) on the keyboard and the display will show the
following:
Enter Data
Del N:
2. Now enter the number of the supplier.
3. By pressing # Enter on the keyboard, the display shows:
Enter Data
Del N:xxxx
Liters =
4. Now enter the liters and press the button # (Enter) on the keyboard. The
display shows:
Del N:xxxx
Liters=yyyy.y
Are you sure?
0-No Yes
Where:
хxxx- entered by the operator number of the supplier
Operation manual 11.04.19 56/110
Ultrasonic milk analyser
Loading way
easy
Cutting way
divulsion(dentiform)
Direct thermal print and auto
paper feed
384 dots/line
8 dots/mm
Printing width
48 mm
Max Printer Speed
85 mm/s(max.)
dot distance
0.125 mm
word size(WⅹH
mm)
ASCⅡ
dots)
8×16; 24
ASCⅡ Size(WⅹH
mm)
16 lattice:2×4; 24
lattice:1.5×3
drawing/bar code
suitable
Testing Method
lacking paper testing
photoelectricity sensor
printer interface
TTL/RS232
buffer
32k
ESC printer command/WH
printing command
DC3.5V--9V (from7.2-5v,with
highest speeed and excellent
effect)
Average electricity
less than 1.5A
Max electricity
less than 3A
Printer
Mechanism
yyyy.y - entered by the operator liters
The operator has the following two possibilities:
1. To cancel the entered data by pressing the button 0 on the keyboard and
to start entering them again.
2. To confirm the entered data by pressing the button # (Enter) on the
keyboard, and then the display will show currently chosen calibration. Now
the device is ready to start measurement. After finishing the measurement,
data, entered for the supplier are printed out.
8.2. Working with the pri nt er
8.2.1. Printer characteristics
Paper Working
Printer
performance
Drawing/Bar
code
Control System
Print method
Printing density
Character(WⅹH
Command System
0.75×1
16 lattice:
lattice:12×24
Woking Voltage
Power
printing head lifespan 50km
Operation manual 11.04.19 57/110
Ultrasonic milk analyser
paper item
thermal paper
paper width
58mm
papaer thickness
65±5um
diameter of paper roll
30mm
0~55℃;-20~55℃
10~90%RH
–25~70℃
10~90%RH
Dimension (WⅹHⅹD
mm)
4
2
3
1
Paper
Environment
adaptability
Physics
Specification
Storage temperature
Fig. 12 Printer control pane l
103mm×57mm×57mm
1. Printout
2. Paper roll compartment
3. Printout button
4. Cover opening button
Changing the roll
To change the paper rolls proceed as follows:
Operation manual 11.04.19 58/110
Ultrasonic milk analyser
1. Press the button as it is shown on the figure.
2. Position the paper roll making sure it unrolls in the proper direction.
3. Tear off the paper and close the cover.
8.2.2. Sequence of actions when printing
The embedded printer is automatically switched on with switching on the
device. After finishing the measuring procedure the results are automatically
printed out. If there is a need of repeated printing of the same results the
operator has to press the button 1 on the embedded keyboard (each
pressing the button 1 on the keyboard the results will be printed out).
Moreover, a copy of the printout can be made by pressing the button A or by
choosing a command Printing from the main menu for operation of the
device (selection of modes for operation).
Operation manual 11.04.19 59/110
Ultrasonic milk analyser
9. ADDITIONAL POSSIBILITIES OF THE ANALYSER
9.1. Connecting to 12 V DC power supply.
If there is a need the analyser to work on place without electrical supply
available, then it could be powered by car battery or other 12 V DC external
power supply. Use the 12 V power supply cable (art. number 30030).
9.2. Connecting to IBM PC
The analyser can be connected to IBM PC using the RS232 interface cable
(art. number 30012, Parts and Accessories, point 16). In order to make the
connection: switch off both the milk analyser and PC. Connect the RS 232
cable towards Com. Port 1 and towards the computer. Turn on both analyser
and PC. Now the device is ready to communicate with IBM PC. For more
detailed information regarding milk collection data program see the file resLS.
9.3. Connecting additi ona l s e rial printer (option).
The interface connector for the printer is on the rear panel of the device
(Com. Port 2). The printer should be connected towards it. Connect it via
cables, delivered by the company-producer. If the printer is connected directly
to the electrical network, then the analyser and the printer should be
connected to one and the same electrical phase.
Communication parameters: 9600 bps, No parity, 8 bits, 1 stop bit. It’s oneway communication (uses one line) – the analyser only sends and the printer
only accepts dat a.
9.4. Connecting matrix pri nter (option).
If the device is working n milk collection center, where work load is heavy,
and there are a lot of results to be printed out, we suggest an option
connecting standard matrix printer (paper expenses would be less, the
reliability better).
Interface connection with the printer is at the rear panel of the analyser
“Parallel printer interface”.
9.5. Measuring high fat sample s (opti on) .
The standard device measures samples up to 25% fat.
On customer’s request, the device could be produced with possibility to
measure samples up to 50% fat. The customer can choose which calibration
to have this possibility and which not, as well as during the process of
exploitation to change the measuring mode i.e. to pass from measuring
normal fat percentage towards high and vice versa.
Operation manual 11.04.19 60/110
Ultrasonic milk analyser
Calibr x
Normal OK HiFat
What the operator sees during these passes is the difference in the speed of
sucking the sample. For that purpose, the high-fat sample has to be
preliminary heated up to 30С +- 3С.
To choose the mode, follow the sequence below:
Setup->Settings->Settings
Page2->Option
Select->SelPumpSpeed->Speed for Cal x
After which the display shows:
Pump Speed
By pressing the correspondent buttons the operator can choose the type of
measurement and to exit the menu.
When changing the type of measurement on a calibration is necessary a new
calibration of the device on the new speed to be done. When calibrating
measuring high fat sample, before starting the calibration procedure, the
operator has to choose from the menu:
Setup->Settings->Settings
Page2->Option
Select->SelPumpSpeed-> HFSpeed for Cal
By which the device passes in a mode of measuring high fat samples.
This calibration mode is active till the power supply of the device is switched
off i.e. it has to be always set if the device will be calibrated for high fat
measurement.
9.6. Working with embedded accumulator (option).
On customers’ request accumulator could be embedded in the milk analyser.
In this way it could work independently on the electrical network. In this case
the Power switch on the rear panel of the analyser serves for close / open the
electric circuit of the outer power supply. After closing the circuit, in order to
start the analyser, the operator has to press the Start button on the front
panel of the analyser.
Switching off the analyser could be done on one of the following ways:
Through the analyser – by switching the Power button on the rear panel of
the analyser.
Through the software – by using the option Shut Down from the Calibration
and Working mode menus.
Operation manual 11.04.19 61/110
Ultrasonic milk analyser
After pressing and holding pressed the button Enter (when choosing
calibration), the following is displayed:
Milk selector
Cal1 – Cow
Cal2 – Sheep
Cal3 – UHT
----------------------------Cleaning
Final clean
Shut Down
By choosing the option Shut Down the operator may switch off the power
supply of the analysers.
In case that the external power supply from the electrical network, the
analyzer automatically starts working with power supply from the battery.
Possible working modes with battery:
1. The analyser is powered by the battery, works normally; the display shows
the following message
Battery Powered
2. The analyser is in mode Sleep – do not accept any commands, expects
change in the power (supply from switching adapter for starting the battery),
display shows the following
Low Battery
3. The battery power is under the allowed minimum, milk analyser is
automatically switched off. Before switching off, for a short time, the display
shows
Out of Battery
Operation manual 11.04.19 62/110
Ultrasonic milk analyser
9.7. Automatic weighting the milk with scales (option).
Scales could be connected towards the milk analyser, which to be used for
weighting the delivered milk before measuring its parameters. For using the
scale the operator has to follow up the two procedures:
- Preparation for work and checking the scales
- Wei ghting delivered milk
9.7.1. Preparation for work a nd checki ng t he sca les
Put the scales on round and solid surface and level it, using its helical legs.
Checking the scales is done by using 2 standards of weight – light and heavy,
for example 5 and 50 kg, in mode:
Setup ->Accessories->Weigh Scale->Measure
(this is OFF Line measuring mode). I n case there is discrepancy noticed, you
need to make scales calibration, as is described below.
9.7.2. Weighting delivered milk.
The procedure is analogous to work when entering data for the deliverer
using additional keypad. The difference is that weight of milk is automatically
send from the scales.
Sequence of work is as follows: switch on the analyser for normal work. Place
the vessel where the milk from different deliverers will be collected, for
example with 80 l volume. W hen the analyser is ready for work, the operator
has to press “#” (Enter) on the digital keyboard. Display shows the following:
Enter Data
Del N:
Now enter the deliverer’s number and press the button “#” (Enter) on the
digital keyboard. Display shows the following:
Net =xx.xxx [kg]
Tare
=yy.yyy[kg]
Totl
=zz.zzz[kg]
0-Tare #OK
where:
xx.xxx – weight of the poured milk of the current deliverer.
Operation manual 11.04.19 63/110
Ultrasonic milk analyser
yy.yyy – tarе’s weight (weight of the milk collecting vessel plus milk,
collected from the previous deliverers, if there is such in the vessel)
zz.zzz – sum of Net + Tare
After the first measurement, across Net will be shown the weight of the milk
collecting vessel, and Tare will show 0. Now press the button Tare, and now
the scales is ready to weight the milk of the deliverer, i.e. Net shows 0. Fill the
glass for sample measuring and the rest of the milk pour in the milk-collecting
vessel, placed on the weighting scales. Now the value on the display across
Net is changing. The operator has to wait the scales to be set at rest and
press the button “#”. The display shows the following:
Net =xx.xxx [kg]
Tare=yy.yyy[kg]
Totl=zz.zzz[kg]
0-Tare #OK
where:
xx.xxx – weight of the poured by the first deliverer milk, for example 20.00 kg.
yy.yyy – Tare’s weight (milk collecting vessel)
zz.zzz – Sum of Net + Tare
After the scales are set at rest, the operator has to press the button “#”, and
the display shows the following:
Del N:aaaa
Kg=yy.yy
Are you sure?
0-No Yes-#
Now the operator has to check the data and if there is need something to be
corrected to press button “0”, which returns in the main menu for entering
deliverer’s number. By pressing the button “#” data is confirmed and following
appears on the display:
Measure:CalName
Start:Enter or *
Operation manual 11.04.19 64/110
Ultrasonic milk analyser
ADC=xxxx.x Set
The operator has to place the sample holder filled with milk sample in the milk
analyser and to start the measurement. The milk analyser measures the
sample and shows the results as in a normal mode. On the print out 2 new
lines appear:
Litres………..19.4
Kilograms…..20.00
Please, have in mind the formula for calculating liters from weight measured:
Litres = Kilograms / Density
where:
Density is measured by the analyser density of the correspondent sample.
When the next deliverer arrives, the operator has to press “#” and to start
again the procedure for entering deliverer’s number and weighting. In this
case weighting scales are ready for the next deliverer’s milk. This procedure
is repeated for every deliverer. When the milk-collecting vessel is full, pour its
content in the cooling tank. Place it back on the scales and press again the
button for new tare calculation.
9.7.3. Control options when wor king w it h s c al e s.
They are entered by using the Setup of the analyser. They are started using
the following menu:
Setup ->Accessories->Weigh Scale:
Raw Test - test for weight scales control. Used mainly in production
conditions.
Calibration – serves for scales calibration (if there is deviation noticed).
For the purpose you have to have 2 standards of weight, for example 5 and
50 kg.
After starting the following is dispalyed:
Using the buttons Up, Down, Enter (as it is done when calibrating the rest of
the milk analyser’s options) enter the weight of the lighter standard of weight,
in our case 05.000. After it, on the bottom line of the display appers:
Operation manual 11.04.19 65/110
Weight Scale Cal
Put Low Weight
Weight
=zz.z
Ultrasonic milk analyser
Special modes
Reports
where:
хххх.х – calibrating data from the scales.
The operator waits for the value to be shown and presses the button below
the word Set. The same procedure is repeated with the heavy standard
weight, for. example 50.000 kg. After the value is shown and pressing the
button Set, a message for completed calibration is displayed. Scales are
ready for work.
Measure – Off Line measuring mode, i.e. the analyser is used as
universal scales. In this mode periodically control of the accuracy of the
scales with standards of weight is needed.
On Line En/Dis – allows / forbids On Line weight scales work
(automatically transferring the kilograms measured milk from the scales to the
analyser, after setting the deliverer’s number). If option Enable is chosen,
follow the way of work described above. If not, then the operator has the
possibility to enter manually liters and number of the every deliverer.
9.8. Working with embedded repor t system for generating and making
reports – Report System (opt ion).
On customer’s request hardware could be embedded in the analyzer,
allowing results from 1000 measurements to be recorded and kept as a
record. On the base of these recorder measurements different reports are
made. Mak ing results’ archives is made automatically after the measurement
is finished, and is controlled via the following menus system:
9.8.1.Setup menu structure
Special modes
…
Reports
Operation manual 11.04.19 66/110
Calibration
Cycle
Init
Report En/Dis
Busy/Free Recs
New Report
Rejec t De l i v N
Del last Me as
Report Options
Prn Single rep
Sel Out Device
Ultrasonic milk analyser
L ines On Page
E mpty Lines Bot
Delay New Line
Delay Pr Header
Print Deliv N
Generator
Fat&SNF Rate
Set Coeffs
Rep for Calibr
Short Report
Large Report
All Large Rep
Shift Selector
Print Page Num
Tools
Send Rec to PC
9.8.2. Basic terms.
The system generates reports on the basis of the archived results. The
results could be send towards:
Serial printer
Parallel printer
Through RS 232 towards IBM PC.
On the basis of Fat and SNF and liters (calculated from kilograms, received
from Weight Scale or entered directly) delivered the system calculates:
Separately, for every measurement. Via option Prn Single rep the
operator may forbid or allow adding these results when, after each
measurement, is printing the rest of the measurement results on the serial
printer.
For all the measurements from the archive, the system calculates:
Average Fat = (Fat1*Litres1 + Fat2*Litres2…) / Litres1+Litres2…)(3)
Total Amount = Amount1 + Amount2 … (4)
Average SNF = (SNF1*Litres1 + SNF2*Litres2…)/
(Litres1+Litres2…) (5)
Operation manual 11.04.19 67/110
Ultrasonic milk analyser
Report Enable
No OK Yes
Show Records
Exit
Calculations are made for each separate calibration. Average results for Fat
and SNF may be used for control of total gathered milk.
In order to start working the report system needs the operator to enable it
(Report En/Dis), and to set the old report in initial adjustment (New Report).
Using IBM PC (via RS232 cable) user can enter the name of Milk collection
center and names of 2 working shifts (i.e. Morning shift 1,2).
During work the operator may delete the result from the archive for the last
measurement (if there is a need to be done). Before starting generating the
reports, coefficients, used for calculations have to be entered (Set Coeffs).
After the working shift is over, the operator has the possibility to print out
Short or Large Shift Report. User has possibilities to reject selected deliverer
number from report (Reject Deliv N).
9.8.3. Menus’ description:
Group Init:
Report En/Dis –enables/disables work of the system for archives and
reports
Yes
Busy/Free Recs – shows the number of busy/free places in the archive.
Total number of records – 1000. When the analyser’s power supply is
switched on, the display shows the number of free records. During real
measurements user can control current archive number using “Page 2
Results”.
Busy: 0038/0000
Free: 0962
where:
Busy xxxx / yyyy
xxxx - number of measurements, which will be used when generating
reports
yyyy - number of measurements, which will not be used when
generating reports i.e. were marked as invalid using the command Reject
Deliv N
Operation manual 11.04.19 68/110
Ultrasonic milk analyser
Start New Rept
No OK Yes
Reject meas for
Del Last Meas
Exit
Prn Single Rep
No OK Yes
New Report – deletes the old archive. In this way the number of free
records for making archives of the results remains 1000.
No
The operator has to be very careful with this command, because, by
choosing Yes the whole archive from previously made measurements will be
deleted and the memory will be set to zero, free for new measurements to be
stored.
Reject Deliv N – measurement for selected Deliverer Number are
excluded from reports.
Del N:
Del last Meas – deletes the archive from the last measurement. If t his
command is repeated, it deletes the result from the measurement before the
last one etc. till the wh
OK! Free = xxxx
Where:
хххх is the number of the free places for saving measurements
results in the memory.
9.8.4. Report Options:
Prn Single rep – enables / disables printing the results from every
sample’s Rate and Amount on the serial printer right after the measurement
is finished.
Operation manual 11.04.19 69/110
No
Ultrasonic milk analyser
Select Output
LPT OK IBM PC
Lines on Page
- OK +
Empty Lines Bot
- OK +
Delay LPT for
Delay LPT prn
Sel Out Device – chooses the outgoing device for Large Shift
Report – it could be parallel printer (printed copy) or IBM PC (file).
For Repor t :
IBM PC
Lines On Page – determines the number of lines in one page for
Large Report.
64
Empty Lines Bot – determines the number of empty lines at the
bottom of page.
0
Delay New Line – printer delay after passing to a new line.
Measured in ms.
NLine[ms]:
Delay Pr Header – printer delay when printing header of the
page. Measured in mS.
Operation manual 11.04.19 70/110
Header[ms]:
Ultrasonic milk analyser
Print meas for
Not Available
Exit
Fat&SNF Rate
Edit Save Exit
Select Calibr
Select Exit
The normal values of these parameters are 0. When using old model printers
(without input memory buffer), it is necessary time delay to be set, for
example 400, in order to be possible speed of the device and printer to be
harmonized.
Note:
Print Deliv N – prints on serial printer results from measurements (the
same after real measurement).
Del N:
The operator has to enter the number of the deliverer, whose results
want to be printed again. If there are no results from a deliverer with such
number, the following message appears on the display:
Group Generator Fat&SNF Rate:
Set Coeffs – sets the coefficients CoefFat и CoefSNF, through which
the report is calculated.
Fat Co= 1.000
Rep for Calibr – chooses the calibration for which the report is
calculated.
Operation manual 11.04.19 71/110
For Repor t :
1.Cow
Ultrasonic milk analyser
Short Report – prints out on the serial printer report for the archive,
calculated using the formulas (3) and (4), for each calibration, separately.
Only the final, summarized results are printed out, without details about each
sample. It is used when quick processing of measurements is needed for
receiving summarized results.
Example for the printout:
MCC Name
Report Fat & SNF
Shift Name
Calibr Cow
FatCo= 1.000
SNFCo= 2.000
Records=6
Litres=13.50
Amount=160.27
Average Fat= 2.35
Average SNF= 4.76
Large Report – makes detailed report for each sample separately for
the chosen calibration (Rep for Calibr, on the chosen device (Sel Out
Device). Report can be send to LPT or IBM PC (via RS 232).
Example for the printout:
SHIFT REPORT Calibr: Cow Time Date Page Number
Total Litres = 13.5 Total Amount=160.27
Average Fat= 2.35 Average SNF= 4.76
FatCo = 1.00 SNFCo= 2.00
Where:
column N: measurement consecutive number
column DelN: deliverer’s number, sorted by ascending number
column Ltrs delivered liters column Fat% measured Fat in percentage
Operation manual 11.04.19 72/110
Ultrasonic milk analyser
Select Shift
Morng OK Eveng
Print Report
column SNF% measured SNF in percentage
col umn Rate calculated Rate (according formula 1)
column Amount calculated Amount (according formula 2)
Total Litres sum of liters delivered. Liters are received by
weighted kilos, using the formula:
Litres = Kilograms / Density
where
Density is measured sample’s density
Total Amount sum of all calculated Amount (according formula 4)
Average Fat average Fat value, calculated according formula 3
Average SNF average SNF value, calculated according formula 5
FatCo, SNFCo values of the coefficients, used in formula 1
All Large Rep - makes detailed report for each sample separately for all
the calibrations (Rep for Calibr) on the chosen device (Sel Out Device).
Shift Selector – user selects which name (Shift 1 or 2 – ent er from IBM
PC) will be printed in the header of each list from LPT report. Using the
program LS-SetReports.exe (see its description) the operator has the
possibility to edit the name of the Milk Collecting Center and 2 unique names
for two work shifts.
For Repor t :
Morning
Print Page Num – generates total report, but the printing out starts from
chosen by the operator sheet.
Page Num:
Group Tools
Send Rec to PC – sends the whole archive using RS 232 towards IBM
PC. Measurement results are send in the order they’ve been made, without
being sorted or processed. In the IBM PC they have to be received from
program from the family resLS (LS-Data Collection System). These data are
not processed from report generating system, but are in an archive Raw data
from measurements. They are gathered in a file, ready to be processed with
MS Excel (see description of programs resLS).
Operation manual 11.04.19 73/110
Ultrasonic milk analyser
Send recs to PC
Exit
9.9. Embedded real time clock (option).
On customer’s request, a real time clock could be embedded in the device,
showing astronomical time and date. The clock is powered by battery, so it is
independent on power supply of the device. The advantage of this option is
that on the print out with the measurement results are shown also the exact
time, when the measurement is made, for example:
The embedded clock is controlled by the device’s Setup, from the main menu
Accessories, submenu RT Clock. When chosen, the display shows the
following:
Display Time
Adjust Time
Adjust Date
Exit
Using these menus, the operator has the possibility to show on the display
the current time and date, and if necessary – to adjust them.
The time is shown in the format:
Operation manual 11.04.19 74/110
Ultrasonic milk analyser
Exit
hh:mm:ss
dd:mm:yy
where:
hh - the current hour
mm - current m inutes
ss - current seconds
dd - current day
mm - current month
yy - current year
9.10. USB Flash-drive (pen drive) (option).
This option allows connecting standard USB Flash Drive (Pen Drive) towards
the Lactoscan. Its usage allows automatically (without operator’s interfere)
creating total archive of all measurements, made with the analyzer. Actions
necessary for switching on/off the USB Flash Drive are analogous to the
same when working with PC. After USB Flash Drive is inserted in the
coupling at the front panel of the analyzer, Lactoscan starts writing there the
results from each measurement. If you do not need to make an archive, then
simply remove the flash drive from the analyser. As when working in PC,
when the flash reads/writes its LED blinks. I this case wait for the Led stop
blinking and then remove the flash drive from the analyser.
Data, collected from measurements, are saved in MS Excel file. The name of
the file is formed by the date, when the measurement is made (in case
there’s embedded clock option). For example – 111213.xls means, that the
file was created in year 2011(last two digits from the year), month 12 –
December, day13. Tabs with results are in accordance with software resLS,
i.e. the file, created on the flash drive is with the same structure and may be
processed with the same, already existent client software, used for collecting
data with PC (see the manual of the software resLS.exe). Meaning of results
tabs are in the file LS-USB.XLS.
The difference is, that if there’s flash drive connected to Lactoscan during
measurements, there’s no need the analyzer to be connected to PC all the
time. In the presence of more than 1 analyzer, each of them may be
equipped with flash drive and at the end of the shift (working day or after a
definite period of time (chosen by the customer) files from different analyzers
to be processed on only one PC.
Operation manual 11.04.19 75/110
Ultrasonic milk analyser
It is recommended this option to be used in combination with RTC and
Keypad. Availability of clock option ensures archive of the time when the
measurement was taken. Clock adjustment can be made with the software
tool LS-AdjustRTClock.exe (see its manual). In presence of Keypad, the
deliverer’s number can be entered (or some kind of number/identifier of the
sample) – number from 1 to 9999 and liters/kg of the milk.
There’s no requirement for type and producer of the Flash Drive, as well as
its storage capacity. Other files, working under MS Windows may be also
present on the flash drive.
Approximately, results from one measurement, take less than 100 bytes. For
example, flash drive of 8 GB, can store more than 80 000 000
measurements, which makes it unlimited from point of view archive of
measurement results.
Use this option ONLY with f lash-drives. Do not connect a ny other USB
devices.
The idea of embedding standard USB Flash-Drive (Pen Drive) in the analyser
is to move to a qualitatively new level in terms of storage and processing of
the measurement results. The Flash-Drive is used as memory for storing the
results. Having in mind the memory volume, necessary for storing the results
from one measurement, Flash-Drives – available on the market are in fact
unlimited memory, i.e if the analyser is working normally it could not be filled
in totally. Flash-Drive Controller development keep all the standard
convenient features for work with it – there’s no limitation when to be
connected to the analyser – it may happen any time. As it is when FlashDrive is placed in PC, on the same way, the Flash-Drive may be removed
from the analyser in case it is not working (its LED is not blinking).
It works with the file structure of MS Windows, the file names are unique,
based on the current date. In this case on the same Flash-Drive can be
stored whatever other files the customer needs to store on it. Files, generated
by the analyser are type MS Excel, ready to be processed with a computer.
What kind of advantages using Flash-Drive gives?
overcomes the restriction of using limited internal memory of the analyser for
collecting data;
There’s no need of constant connection between LS and PC or LS –
specialized external device for collecting data. The only thing needed is to
Operation manual 11.04.19 76/110
Ultrasonic milk analyser
place the Flash-Drive in the USB coupling when needed and remove it when
it is not needed – that’s the total training an operator needs.
Having in mind above described mobility of this option, there are different
scenarios for using it, depending on the specific conditions.
Example for mobile version: Lactoscan milk analyser is used on a milk
collecting truck, which is going from place to place to collect milk. Lactoscan
is powered by the accumulator of the truck (through the car-lighter for
example). The operator of the analyser enters (with the embedded in the
upper cover of Lactoscan milk analyser keypad) the deliverer’s number and
liters delivered, takes sample and starts measurement of its parameters. After
the measurement is finished, the measured results, together with the already
entered by the operator data for the milk deliverer automatically, without
operators interfere are stored on the Flash-Drive. On practice, this operation
is “invisible” for the operator, does not take additional time and the operator
has the possibility to start servicing the next deliverer. After arriving in the
base (milk collecting center/dairy), the operator has just to disconnect the
Flash-Drive and give it to the laboratory, which, in fact, is his daily report for
the work he has done. Results are transferred to a PC as standard files and
as per the strategy accepted – they can be saved or removed/deleted from
the flash. And all this can happen within 1-2 minutes, which makes the total
process of reporting and archiving the results automatic.
Even to make the process faster, it is possible to make weighting the milk
automatic – in dependence of end-user choice, according the available
technique, weight scales may be connected to the analyser – via analog or
serial channel. In this case, after entering suppliers’ number, the analyser
passes automatically in mode weighting scales and starts accepting data
coming from the connected to it weight scales. The way of saving the results
on the Flash-Drive is exactly the same as described when data are entered
via the keypad.
Operation manual 11.04.19 77/110
Ultrasonic milk analyser
Low Fat
High Fat
Middle
1
Cow
2,2%
5,2%
3,6%
APPENDICES
APPENDIX 1: PREPARATION OF SAMPLES FOR
MILKANALYSERS’ CALIBRATION
For calibration are needed samples of cow milk with the following
parameters:
For the calibration are needed:
1. Distilled water
2. Min. 3 milk samples with known values for fat, SNF, protein, density,
lactose, sal ts.
Calibration samples have to be with low, middle and high values of the
analyzed components. Samples have to be representative for given milk type.
Volume of the sample has to be enough for making min 5 measurements for
each sample – not less than 1,00 l. Changes in the analyzed parameters in
the samples have, if possible, to cover the whole measuring range – i. e . us ed
samples to be with low, middle and high content of the analyzed components.
Methods of milk samples preparation for calibration.
For milk sample with middle value of the analysed components we
recommend to use milk taken from not less than 10 animals from most
common in the region breed.
Sample with low and high value are prepared on the following way:
1. Pour the fresh milk with FAT at about 3.7% in a separating funnel.
2. Leave the funnel with the milk in refrigerator for 12 hours at temperature
+5-+8 ° C.
3. Draw the s ubstratum of the separated milk in a vessel, mix it well, pour
it and heat it in water-bath up to 20°C.
4. Pour the upper layer in another vessel.
5. Determine the concentration of the measured components (FAT,
protein, SNF, density, lactose, solids) by using certified methods.
The analyser’s accuracy depends only on the correctness of the chemical
analysis of the components in the samples and the normal acidity during
calibration!
It is recommended the first cow milk sample with low fat content to be with
the following parameters:
Operation manual 11.04.19 78/110
Ultrasonic milk analyser
2-2,3% FAT; 8.7-9% SNF; 3,3-3,5 % Protein; 4,8-4,9% Lactose; 0,75 Salts;
1030-1033 kg/m3 Density.
The second cow milk sample with high fat content to be with the following
parameters:
5-5,3% FAT; 8.4-8,79% SNF; 3,1-3,2% Protein; 4,6 -4,7% Lactose; 0,7 S alts;
1028-1029 kg/m3 Density.
If, after milk’s separation you do not obtain samples in the requested range,
then, by adding milk with high fat value into the low fat milk sample you can
obtain necessary value-2,3%
Analogous to this, by adding low fat milk sample into a milk sample with high
fat value you may receive 5,3%
Samples with medium values are received by mixing low fat and high fat
samples in necessary proportion.
If there is a need of longer sample storing they have to be preserved; the
most commonly used preservative is potassium dichromate (K2Cr2O7) - 1 g
for 1 000 ml.
When using samples, stored shortly, preliminary pour the sample from one
vessel to another in order to distribute the milk components evenly paying
attention not to form foam in the sample.
When the samples are stored for a longer period it is recommended to warm
it up to 35-45 °С, and the vessel to be shaken carefully. In case that there is a
cream stuck on th e vessel’s su r faces – remove it. The sample is poured from
vessel to vessel several times and is cooled down (advisable to 20 °С /.
If there is separated liquefied fat or white particles with irregular form on the
vessel’s walls reliable results could not be received.
Because it is very difficult both lactose and salts to be measured but they are
substantial and influence in great extend when determine added water. That’s
why it is better both lactose and salts to be calculated by using SNF results.
The milk must be for sure without added water.
If you are unable to make the analysis of milk in certified methods in a pinch
you can use the following formulas:
DETERMINATION OF THE BASIC PARAMETERS IN THE MILK SAMPLE
BY USING FORMULAS IS NOT AS PRECISE AS USING THE ARBITRARY
METHODS, BUT IS SUITABLE FOR USAGE IN FIELD WORK.
Operation manual 11.04.19 79/110
Ultrasonic milk analyser
378,0
/100100%075,0densityF
SNF
−+∗
=
1. Determination some of the par amete rs by formulas
There is dependence between the different parameters in milk and its
density, which may be expressed with mathematical equation. On this base
different formula, tested and confirmed by the classical laboratory methods
for analysis, are developed. We recommend the following:
2. SNF determination.
For determination of SNF the correlation dependence exists between the
milk’s density, fat and SNF in the milk. When the density and the fat are
known, the SNF can be calculated.
There are several formulas with different applicability.
А/ When the Total Solids and fat are known
SNF is calculated by subtracting the fat percentage from the Total solids.
SNF = Total Solids – F (%)
Where
Total Solids in (%),
F – fat content in (%),
This formula is used for determination of SNF in whey, buttermilk, and cream.
B/ Known quantity of fat and density (most commonly used method when
maximum accuracy is needed).
We recommend the following formula:
This is a universal formula and actual for milk of almost all kind of cows and
sheep all over the world.
3. Determination of lactose conte nt
We recommend the following formulas:
А/ for cow milk
Lact. = SNF * 0,55 (% )
Where
SNF – content of SNF in percentages (%),
0,55 – constant coeffi ci ent.
B/ for sheep milk
Lact. = SNF* 0,45 (% )
Operation manual 11.04.19 80/110
Ultrasonic milk analyser
Where
SNF –solids-non-fat content in percentages (%),
0,45 – constant coeffi ci ent.
This is an actual coefficient for sheep breeds on the territory of the Balkan
Peninsula.
4. Determination of salt s c ont e nt
We recommend using the following formulas:
А/ for cow milk
Salts = SNF* 0,083 (% )
Where
SNF – solids-non-fat content in percentages (%),
0,083 – constant coefficie n t.
B/ for sheep milk
Salts = SNF * 0,075 (% )
Where
SNF – solids-non-fat content n percentages (%),
0,075 – constant coefficien t.
This is an actual coefficient for sheep breeds on the territory of the Balkan
Peninsula.
5. Determination of tota l proteins content
We recommend using the following formulas:
А/ for cow milk
Protein = SNF * 0,367 (% )
Where
SNF - solids-non-fat content in percentages (%),
0,367 – constant coefficient.
B/ for sheep milk
Protein = SNF * 0,475 (% )
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Ultrasonic milk analyser
Where
SNF – solids-non-fat content in percentages (%),
0,475 - constant coefficient.
This is an actual coefficient for sheep breeds on the territory of the Balkan
Peninsula.
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Ultrasonic milk analyser
APPENDIX 2 FREEZING POINT DETERMINATION
1. Methods for determination.
The milk analyzer determines the freezing point of each sample and the
quantity of added water. The milk analyser does not measure the freezing
point, but calculates it from the components it depends on. The basic
components in the milk are water, salts, lactose, FAT, proteins, minerals
(salts) and acids. The freezing point depends only on the diluted in the milk
components and quantity of the solvent (in the milk it is water). The ultrasonic
technology allows direct measurement of FAT, proteins, lactose + salts (the
soluble components, only influencing the freezing point), and the quantity of
the solvent in % is determined by 100 % – total solids % , total solids = lactose
% + FAT % + proteins % + salts % + acids %.
Without understanding the meaning of the freezing point – determined or
shown from the milk analyzer added water result easily may lead to a mistake
for the value of this parameter.
2. The basic freezing point.
Milk freezes at lower temperature than water. The average freezing point of
the raw milk in the most regions is at about -0,540°С. The average reading
for your region is called “basic” freezing point.
The freezing point of milk is a “physiological constant”. This does not mean
that it will not vary. In fact feed, breed, season, time of lactation, climate,
whether the sample is taken at the beginning, middle or end of lactation – all
these factors will have an effect on the freezing point of the individual sample.
This means that there is an average value of all these numbers. The more
samples used in obtaining this average, the more reliable it is as a base. Or
the basic freezing point is an average of freezing points of milk, taken from
many cows. When a laboratory checks a producer, it is only comparing the
average of the producer’s cows against a larger area average.
The Health authorities establish the basic freezing point or agriculture
departments in some regions, sometimes by universities, separate dairy
producers, or their associations. Frequently, tolerances have been
established on top of a basic freezing point to allow some variations in the
milk as well as device or operator variations.
Without mentioning the basic freezing point, the Association of Official
Analytical Chemists now recommends an upper limit freezing point at 0,525°C (2,326 standard deviations above the most recently determined
North American average of –0,5404°C), below which there will be at 95%
Operation manual 11.04.19 83/110
Ultrasonic milk analyser
[%]100
int
intint
∗
−
=
Base
CalcBase
FrPo
FrPoFrPo
AddedWater
confidence that will show 99% of all freezing point determinations on
unwatered milk:
“if the freezing point is –0,525°C or below, milk may be presumed to be free
of water or may be confirmed as water free by tests, specified below. If the
freezing point is above –0,525°C, milk will be designated as “presumptive
added water” and will be confirmed as added water or added water free by
tests specified below. Evaluate extreme daily fluctuations in the freezing point
of herd, pooled herd, or processed milk for presence of added water”.
“Presumed added water”, as described above, must be “confirmed” by means
of tests on authentic milk samples obtained as specified in the АОАС
METHODS.
After determination the freezing point of your sample via the milk analyzer,
the added water is calculated using the following formula:
Where:
FrPointBase is the basic freezing point
FrPointCalc is measured freezing point
Note:
If the freezing point is not correctly determined, the result for the added water
is not valid. In this case results for FrPoint and AddWater are not shown on
the display and on the printout from the printer. If the density of the measured
sample is 0, the result for AddWater is not valid and is also not shown on the
display and the printouts.
Sample:
First variant
If you’ve entered for milk analyzer basic freezing point -0.520°C (according
article 5.9 of the EU Milk Hygiene Directive 92/46/ЕЕС), measured freezing
point –0.540°C, using the above pointed formula you’ll receive –3,8%.
Because it is not possible the added water to be negative value, the milk
analyzer indicates 0% added water. The reason for this is the tolerance in the
basic freezing point, reasons for which are described below.
If in the same milk we add 3,8% water, and the basic freezing point is the
same, the milk analyzer will measure freezing point –0.520°C, and will
indicate again 0% added water.
Operation manual 11.04.19 84/110
Ultrasonic milk analyser
Second variant
If you’ve entered for the device basic freezing point –0.540°C, measured
freezing point –0.540°C, the milk analyzer will indicate 0%. When you add
3,8% water, the device will indicate 3,8%-added water.
From the above mentioned follows that it is very important to enter correct
basic freezing point in the device.
The device’s results for added water may give information about doubt of
added water in the milk and the exact value of this added water may be
determined after a “cowshed sample” is taken and the result for the freezing
point, measured by the milk analyzer of the “cowshed sample” is entered as
basic freezing point in the formula for calculation of added water.
Then the result from this formula will give us the absolute value of the added
water for the corresponding milk supplier.
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Ultrasonic milk analyser
APPENDIX 3 PH MEASURING
1. General in formation
PH probe is a unit, measuring the solution acidity or alkalinity degree. It is
measured on scale of 0 to 14. The term pH is derived from "p", the
mathematical symbol for the negative logarithm, and "H", the chemical
symbol of Hydrogen. The formal definition of pH is the negative logarithm of
the Hydrogen ion activity.
2. pH Electrode
For pH measurement the milk analyzer needs a combination electrode,
compatible with most pH electrodes that have BNC connectors and zero
potential (the pH where the mill volt output of the electrode equals 0) near 7
pH.
2.1. Electrode part
The electrode is the most important part of the pH measurement. The
electrode glass membrane is fragile and must be handled with care. To
protect the glass membrane and to maintain activation, a protective rubber
cap containing a suitable storage solution covers the glass membrane.
2.2. Electrode care & Electrode maintenance
pH Electrodes are susceptible to dirt and contamination and need to be clean
regularly depending on the extent and condition of use. At no time should one
touch or rub the glass bulb as this causes the build-up of electrostatic charge.
2.3. Storage
For best results, always keep the pH bulb wet. An optimal storage solution for
combination electrode is pH 4 buffer with 225 grams of KCl per liter. Table
salt, NaCl, can be used if KCl is not really available. Other pH buffers or tap
water are also acceptable storage media, but avoid storage in de-ionized
water. The protective rubber cap filled with the buffer solution provides ideal
storage for long periods.
2.4. After Use
After measurement is completed, follow the sequence below for storage.
- Wash the electrode and reference junction in de-io nized water.
- Close the refilling hole by returning its rubber sleeve or stopper cap.
(Necessary for only refillable electrode).
- Store the electrode as mentioned above (see section Storage).
The reference electrolyte needs to be refilled when the electrode has been
used for a long period, or when the internal electrolyte has dried up. To
accomplish this, follow the procedure described below.
- Remove the protective rubber cap or sleeve;
- Remove the protective rubber sleeve to expose the filling port of the
electrode;
- Remove the old reference electrolyte with a syringe;
- Fill the new reference electrolyte.
2.6. New electrolyte preparation:
- Open the KCl container;
- Add in de-ionized water until it reaches the level of 20 ml;
- Close the container and shake it to dissolve the KCl;
- Add in fr esh electrolyte until it reaches the level of the refilling port. The
reference electrolyte used should be 3M(Mol) KCl;
- Replace the rubber sleeve.
2.7. Re-use the electrode.
- Rinse the liquid junction with de-ionized water.
If these steps fail to restore normal electrode response, you may attempt to
rejuvenate it (See: Electrode Rejuvenation).
2.8. Electrode cleaning
Electrodes which are mechanically intact can often be restored to normal
performance by one or combination of the following procedures.
- Salt deposits:
Dissolve the deposit by immersing the electrode in tap water for ten to fifteen
minutes. Then thoroughly rinse with de-ionized water. Wash the electrode pH
bulb in a little detergent and water. Rinse electrode tip in with de-ionized
water.
- Oil/Grease films:
Wash electrode pH bulb in a little detergent and water. Rinse electrode tip
with de-ionized water.
- Clogged Reference Junction:
pH electrodes have junction, which allows the internal fill solution of the
measuring electrode to leak out into the solution being measured. The
Operation manual 11.04.19 87/110
Ultrasonic milk analyser
junction can become clogged by contamination in the solution. If a clogged
junction is suspected it is best to clear the junction.
Heat up the diluted KCl solution to 60-80°C. Place the sensing part of the pH
electrode into the heated KCl solution for approximately 10 minutes. Allow the
electrode to cool while immersed in some unheated KCl solution.
- Protein Deposits
Prepare 1% pepsin solution in 0.1 M HCI. Allow the electrode to stand in this
solution for five to ten minutes. Rinse the electrode with de-ionized water.
2.9. Electrode activation
Generally, if the procedure of storage and maintenance had been closely
followed, the electrode can
be used immediately. However, should the electrode response become
sluggish, it may be possible that the bulb has dehydrated.
The bulb can be dehydrated by immersing the electrode in an ideal storage
solution (e.g. buffer pH 4 solution) for 1-2 hours. If this fails, the electrode
may require re-activation. If the above procedure does not reactivate the
electrode to acceptable status, try rejuvenation the electrode by following the
procedure outlined below.
2.10. Rejuvenation Pr oce dure
Dip and stir the electrode in freon or alcohol for 5 minutes.
Leave the electrode in tap water for 15 minutes.
Dip and stir the electrode in concentrated acid (HCI, H
) for 5 minutes.
2S4
Leave the electrode in tap water for 15 minutes.
Dip and stir in strong base (NaOH) for 5 minutes.
Leave the electrode in tap water for 15 minutes.
Test with standard calibration solution.
Finally, test with standard calibration buffer solution to see if the electrode
yields acceptable results. You may repeat again for better response
(maximum 3 times). If the response does not improve, then the electrode has
completed its useful life. Replace with a new electrode.
2.11. Electrode Lifespan
pH electrodes have a finite lifespan due to their inherent properties. How long
a pH electrode will last will depend on how it is cared and the solution it is
used to measure. Even if an electrode is not used it still ages. Electrode
demise can usually be characterized by a sluggish response, erratic readings
or a reading, which will not change. When this occurs an electrode can no
longer be calibrated. pH electrodes are fragile and have a limited lifespan.
How long an electrode will last is determined by how well is maintained and
the pH application. The harsher the system, the shorter the lifespan. For this
Operation manual 11.04.19 88/110
Ultrasonic milk analyser
Description
pH 7.00±0,01/20ºC
pH 4.00±0,01/20ºC
Composition
Potassium dihydrogen
hydrogen phosphate
Borax, Sodium
Temperature
10ºC - 7.06
50ºC - 6.91
10ºC - 4.00
50ºC - 4.05
reason it is always a good idea to have a back-up electrode on hand to avoid
any system down time.
3. Buffer Solutions
Buffers are solutions that have constant pH values and the ability to resist
changes in that pH level. They are used to calibrate pH measurement
system.
PH buffer solution descript ion ( Pharmacopoeia standar d)
Use only this types standard buffe rs for calibration!
parameters
phosphate, Di-sodium
25ºC - 6.99
20ºC - 7.00
30ºC - 6.98
40ºC -
6.95
hydroxide solution
25ºC - 4.00
20ºC - 4.00
30ºC - 4.00
40ºC
- 4.00
4. pH Electrode Calibration
pH Electrodes are like batteries; they run down with time and use. As an
electrode ages, its glass changes resistance. For this reason, electrodes
need to be calibrated on a regular basis. Calibration in pH buffer solution
corrects for this change.
Calibration is an important part of electrode maintenance. This assures not
only that the electrode is behaving properly but that the system is operating
correctly.
Usually pH meters require calibration at 3 specific pH values. One calibration
is usually performed at pH 7, second and third are typically performed at pH 4
and pH 10.
It is best to select a buffer as close as possible to the actual pH value of the
sample to be measured. Use standard calibration buffers that the
temperature and the sample solution are the same.
Use the operation manual for the corresponding pH meter.
Operation manual 11.04.19 89/110
Ultrasonic milk analyser
°C
pH
2 3 4 5 6 7 8 9 10
11
12 5 .30
.24
.18
.12
.06
0
.06
.12
.18
.24
.30
15
.15
.12
.09
.06
.03
0
.03
.06
.09
.12
.15
25 0 0 0 0 0 0 0 0 0 0 35
.15
.12
.09
.06
.03
0
.03
.06
.09
.12
.15
45
.30
.24
.18
.12
.06
0
.06
.12
.18
.24
.30
55
.45
.36
.27
.18
.09
0
.09
.18
.27
.36
.45
65
.60
.48
.36
.24
.12
0
.12
.24
.36
.48
.60
75
.75
.60
.45
.30
.15
0
.15
.30
.45
.60
.75
85
.90
.72
.54
.36
.18
0
.18
.36
.54
.72
.90
For Sensorex pH electrodes, originally supplied wit h The analyser read
the following information:
Temperature compensations
The output of pH electrodes varies with temperature in manner, predicted by
theory. When needed, Sensorex can supply electrode holders with build-in
automatic temperature compensators. The need of automatic compensation
depends on the temperature variation, the pH value being measured. At pH
of about 7 there is no error due to temperature and, of course, at a constant
temperature there is no error. As shown in the following table, the pH error
due to temperature is a function of both the temperature and the pH value
being measured. At a pH of about 7 there is no error due to temperature and,
of course, at a constant temperature there is no error. The more the
temperature changes from the ambient calibration temperature and the more
the pH departs from 7 the greater is the pH error.
pH temperature error table
0 pH Error Range Less than .1 pH Error Range
5. PH helpful hints
For greatest accuracy in pH measurement, follow these guidelines:
Use the same technique to measure samples, which was used for calibration.
Be consistent with stirring rates, times and conditions.
Calibrate with buffers, which are close in temperature to that of the sample.
Calibrate the pH electrode regularly, e.g. once an hour for accuracy to within
0.01 pH, or once a day for accuracy to within 0.1 pH.
Use fresh buffers for calibrations. Avoid contamination of the stock buffer
solution and do not use it beyond the expiry date.
Keep all connections dry.
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Ultrasonic milk analyser
Immerse the electrode far enough into the solution to insure the reference
junction is below the surface.
Allow adequate time for the electrode to stabilize in standards and samples
before taking a reading.
Clean the electrode periodically. Allow more time for aged electrodes.
Do not use the pH electrode in solutions of fluoride ion at low pH. This will
etch the glass membrane.
Sulphide vapors can permeate the electrode wick and contaminate the
reference element. Minimize contact in such environments and change the
reference electrolyte frequently.
6.Preparation for pH measurement
When the analyzer is with pH measuring option, it is received from the
customer with pH probe packed separately and there’s a stopper on its place.
If you need to measure pH follow the procedure below:
1. Loose the nut anti-clockwise.
2. pull up the stopper
Operation manual 11.04.19 91/110
Ultrasonic milk analyser
Fig. 13 Removing the stopper
3. Carefully place the pH probe paying attention not to remove the sealing Oring.
4.Place the probe with the nut in the hole and tighten it.
It is very important to close the nut tightly, paying attention not to allow air to
enter the system.
Operation manual 11.04.19 92/110
Ultrasonic milk analyser
Fig. 14 Placing the probe
Operation manual 11.04.19 93/110
Ultrasonic milk analyser
If you are working with the analyser regularly (each day) do not remove the
probe after work..
If you ‘ll not use the analyser more than 2 days, you must take out the probe
and to place the stopper back.
The pH probe must be stored separately as per the instructions of point 2.3
Appendix 3.
7. PH measuring.
Measuring pH is an additional feature of the analyser and is optional.
Remove the protective rubber cap of the pH electrode. Take care to handle it
appropriate in order not to be damaged. Use de-ionized or distilled water to
rinse the electrode before usage. Fill in the sample holder with milk, put it in
the recess of the analyser and dip the pH electrode into the milk sample,
ensuring complete dip of the electrode in the sample. Stir gently for
homogenization of the sample.
Measuring can be done in two modes:
Off line by starting the menu pH & Co Meter | Measuring, when the
analyser works only as a pH meter.
Operation manual 11.04.19 94/110
Ultrasonic milk analyser
On line automatic pH measuring, when measuring the rest of the sample’s
parameters.
When starting work with рН meter first connect the probe/sensor, and then
the power supply of the device.
Having in mind the characteristics of the process of pH measuring it is
necessary to dip the
рН probe in the sample and then to press the button
Enter.
After starting the menu pH & Co Meter the following message appears on
the display:
pH Calibration
pH Measuring
pH En/Disable
pH U Display
------------------------pH Test
Co Meter Calibr
Co Meter Test
Co Meter En/Dis
------------------------Exit
Operation manual 11.04.19 95/110
Ultrasonic milk analyser
8.pH Calibration.
Fig. 15 Calibration buffe rs
Take out the sensor. You may not place the nut, because the analyzer do not
sucks during calibration.
Serve for pH meter’s calibration. For this purpose 2 sample buffers are used,
shown on the display as Low buffer (for example 3.00 pH) and High buffer
(for example 7.00 pH). Follow the procedure:
Please, use this procedure only if you have enough calibration buffers as they
could not be used more after the procedure. In case you have no enough
buffers, place the pH probe in a separate vessels with calibration buffers and
water near the analyzer as per Fig. 14.
1. Start the Calibration menu.
2. Put the probe in the buffer, corresponding to the isopotential point of the
probe (in most of the cases it is 7.00).
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Ultrasonic milk analyser
3. Using the analyzer’s buttons enter the exact buffer value. For the probes
which are delivered with the analyzer, the isopotential point is always 7.00.
The following is displayed:
pH Calibr
Put Izopot buff
Buf=xx.xxx
4. The operator has to enter the buffer’s value, when the probe is in its
isopotential point and to press the button Enter.
After that the display shows:
pH Calibr
Put Izopot buff
Buf=xx.xxx
V=x.xxxV Set
Where x.xxxxV is the measured in the probe voltage.
5.Press the button Set when the readings stop moving.
6. Repeat the procedure with Next buffer and the display shows the
following:
Put filled with
Water glass
And Enter press
To continue
1. The operator has to place a glass filled with distilled water and to
press Enter, in order to clean the probe from previously used
calibration liquid. After the cleaning the analyzer is ready to start
working with the next calibration liquid.
2. Repeat the procedure with the Next buffer. The following message
appears on the display:
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Ultrasonic milk analyser
pH Calibr OK
Which shows that the calibration procedure was completed successfully. The
calibrated device is ready for making measurements.
8. The device automatically passes in mode pH measuring.
9. Check the correctness of the calibration by measuring buffer solution 7.00.
9. pH Measuring.
After starting this menu the measurement is done in mode off line, i.e. the
analyser works only as a pH meter. The operator has to dip the probe in the
sample and on the display the following is shown:
pH measuring
x.xxxV
y. y y pH
Exit
Where:
x.xxx – measured by the probe voltage
y.yyy – measured probe’s pH
By pressing the button Exit, t he operator may exit the program and to pass
towards another menu.
10. pH En/Disable
Serves for enabling/disabling the pH measuring during normal work of the
analyser - On line. After st a r ti ng it the display shows:
pH Measuring
XXX
No OK Yes
Where:
XXX is the current situation of the working mode. By pressing the buttons
below the corresponding inscriptions it could be changed, as Yes – means
that during normal work of the analyser – measuring the rest of the
parameters, pH will also be measured. If No is chosen, then pH is not
measured.
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Ultrasonic milk analyser
11. pH U Display
Serves for allowing/forbidding the value of the pH probe voltage during pH
parameter measuring. After starting it the display shows:
PHUDisplay
XXX
No OK Yes
Where XXX is the current state of the displaying mode. By pressing the
buttons below the inscriptions it could be changed, as Yes – means that
during pH measuring the voltage of the pH probe will be shown.
If No is chosen, it will not be shown. It refers to both of the measuring modes.
12. pH test
serves for testing the measuring system in production mode.
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Ultrasonic milk analyser
Milk type
Conductivity values
Cow milk
between 4 to 6 mS/cm (18°C);
Sheep milk
between 3 to 5 mS/cm (18°C);
Buffalo
between 2,5 to 5 mS/cm (18°C);
Added water, sugar,
solids
Decrease the ion's concentration. Milk conductivity
Added salts
Increase the ion's concentration. Milk conductivity
Increase the ion's concentration. Milk
Often the milk is falsified
salt: towards milk with good
characteristics: fat 4%, SNF 8,8, conductivity 4,5
are added salt and water. Then the results are
changed to 3,2 and 8,8, conductivity 10. In other
words adding water regulates the increased value
l (within the
boundaries/parameters) and even the fat is
determined if the sample is falsified, but the only
be careful, as the falsification is not the only
possible reason for conductivity increasing. The
other possibility is mastitis that’s why we
recommend using another (chemical) method for
checking it.
Significantly extreme
Should indicate the development of mastitis.
APPENDIX 4 CONDUCTIVITY MEASURING
1. Method of determination.
Conductivity (or Electrolytic Conductivity) is defined as the ability of a
substance to conduct electrical current. It is the reciprocal of the resistance.
In a healthy animal*, the mean value of electric conductivity is:
*These values depend on the geographical region, the breed and on other
factors.
Milk conductivity changes on the concentration of ions in the milk:
proteins, insoluble
decreases.
increases.
conductivity increases.
by adding
of SNF and density till norma
normal. By the values of these parameters may be
characteristic, proving this is conductivity, which is
out of boundaries nevertheless added water. But
Operation manual 11.04.19 100/110
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