MLS-BA-defsi-0713
6
7
GB
KERN MLS
Version 1.3 04/2007
Instruction manual
Electronic Moisture Analyser
Table of contents
1 Technical data_________________________________________________ 69
2 Declaration of conformity _______________________________________ 70
3 Fundamental information (general)________________________________ 71
3.1 Designated use __________________________________________________ 71
3.2 Inappropriate use ________________________________________________ 71
3.3 Protective measures _____________________________________________ 71
3.4 Danger Information_______________________________________________ 71
3.5 Guarantee ______________________________________________________ 72
3.6 Monitoring the test substances_____________________________________ 72
4 Fundamental safety instructions__________________________________ 72
4.1 Observe notices in the operating manual ____________________________ 72
4.2 Training of personnel_____________________________________________ 72
5 Transport and storage __________________________________________ 72
5.1 Acceptance check _______________________________________________ 72
5.2 Packing ________________________________________________________ 72
6 Unpacking, installation and commissioning ________________________
73
6.1 Installation Site, Location of Use ___________________________________ 73
6.1.1 Assembly ___________________________________________________________ 74
6.1.2 Scope of delivery _____________________________________________________ 75
6.2 Mains supply____________________________________________________ 75
6.3 Connection of peripheral equipment ________________________________ 75
6.4 Connection of peripheral equipment ________________________________ 76
6.5 Initial Commissioning ____________________________________________ 76
6.5.1 Rear view ___________________________________________________________ 76
6.5.2 Display _____________________________________________________________ 77
7 Menu_________________________________________________________ 77
7.1 User principle of the menu control __________________________________ 80
7.2 Operating the balance with PS/2 keyboard ___________________________ 82
8 User menu ____________________________________________________ 83
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8.1 Menu selection (weight calibration / temp. calibration etc.)_______________ 84
8.1.1 P1 Calibration (adjustment) _____________________________________________ 84
8.1.2 P2 GLP (Good laboratory practice) _______________________________________ 94
8.1.3 P3 Date/time_________________________________________________________ 96
8.1.4 P4 Readout__________________________________________________________ 98
8.1.5 P5 RS-232 _________________________________________________________ 100
8.1.6 P6 Printout _________________________________________________________ 100
8.1.7 P7 General functions _________________________________________________ 107
9 Operator menu _______________________________________________ 108
9.1 Program library_________________________________________________ 108
9.2 Select heating profile ____________________________________________ 110
9.3 Select turn-off criterion __________________________________________ 111
9.4 Select calculation method ________________________________________ 112
9.5 Select interval of data output _____________________________________ 113
9.6 Enter target weight of the sample__________________________________ 114
9.7 Determine correction factor and enter ______________________________ 115
9.8 Select standard setting __________________________________________ 116
10 Call up data from the program library: __________________________ 116
11 Set drying parameters _______________________________________ 117
11.1 Select profile ___________________________________________________ 117
11.2 Select finishing criterion _________________________________________ 118
11.3 Select result calculation _________________________________________ 119
11.4 Select output interval ____________________________________________ 120
12 Carry out drying ____________________________________________ 121
13 General issues concerning moisture analyzing___________________ 123
13.1 Application ____________________________________________________ 123
13.2 Sample material ________________________________________________ 123
13.3 Sample preparation _____________________________________________ 123
13.4 Drying temperature______________________________________________ 124
13.5 Description of the heating methods ________________________________ 125
13.6 Application table (recommendations/ reference values) _______________ 126
14 Data output ________________________________________________ 127
14.1 Remote commands _____________________________________________ 128
15 Maintenance, upkeep, disposal ________________________________ 129
15.1 Cleaning ______________________________________________________ 129
15.2 Maintenance, upkeep ____________________________________________ 131
15.3 Disposal_______________________________________________________ 131
16 Troubleshooting ____________________________________________ 131
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1 Technical data
Data MLS 50-3IR160 MLS 50-3HA160 MLS 50-3HA250
Radiator type
2 Infrared radiators,
300 Watts each
2 Halogen crystal
radiators,
300 Watts each
2 Halogen crystal
radiators,
300 Watts each
Temperature range
50°C - 160°C 50°C - 160°C 50°C - 250°C
Maximum load
50 g
Minimum for drying
0.02 g
Readability (d) at weighing < 1,5 g
0.001 g / 0.01%
Readability (d) at weighing > 1,5 g
0,001 g / 0,001 %
Heating methods
• standard
• fast speed
• stage drying (freely selectable time / temperatura stages)
• Soft
Reproducibility at weighing 2 g
0,5 %
Reproducibility at weighing 10 g
0,02 %
Reproducibility in weighing mode
(=standard deviation)
0.001g
Recommended adjusting weight,
not included (class)
50g (F2)
Ambient conditions
• 10°C ... 40°C surrounding temperature
• max. 80 % air humidity (not condensing)
Turn-off criterion
• Automatic 1 (change of mass less than 1 mg in 20 s)
• Automatic 2 (change of mass less than 1 mg in 50s)
• Automatic 3 (change of mass less than 1 mg in 120s)
• Automatic 4 (change of mass less than 1 mg in 180s)
• Automatic 5 (change of mass less than 1 mg in 240s)
• User defined
• User defined 2
• Test
• Manual
• Time-controlled (1 min – 9h 59 min)
Sample plates included
10 (Ø 92 mm)
Display after drying
(*SG = Starting weight g)
Humidity [%] = weight loss (WL) from SG* 0 – 100 %
Dry matter [%] = residual weight (RW) from SG* 100 – 0 %
ATRO [%] [ (SG – RG) : RG ] x 100% 0 – 999 %
Residual weight [g] (RW) Absolute value in [g]
Display can be changed any time
Interface/RS232
Print-out in the selected language
Dimensions
210 x 335 x 180 mm
Net weight
6 kg
Electr. source
220-230VAC /50-60Hz or 115VAC
[ONLY to be modified by specialist]
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0
2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Post box 4052
E-Mail: info@kern-sohn.de
Tel.: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Konformitätserklärung
Declaration of conformity for apparatus with CE mark
Konformitätserklärung für Geräte mit CE-Zeichen
Déclaration de conformité pour appareils portant la marque CE
Declaración de conformidad para aparatos con marca CE
Dichiarazione di conformità per apparecchi contrassegnati con la marcatura CE
English
We hereby declare that the product to which this declaration refers conforms to the
following standards.
German
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den
nachstehenden Normen übereinstimmt.
Français
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Español
Manifestamos en la presente que el producto al que se refiere esta declaración está de
acuerdo con las normas siguientes
Italiano
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è
conforme alle norme di seguito citate.
Electronic Balance: KERN MLS
Mark applied EU Directive Standards
89/336EEC (EMC)
73/023/EEC (Low Voltage )
EN 61000-4-2 :1999
EN 61000-4-3 :1996
EN 61000-4-4 : 1999
EN 61000-4-5 : 1998
EN 61000-4-6 : 1999
EN 61000-4-11 : 1997
EN 55022 :2000
PN-EN 61010-1 :2004
Date: 20.12.2006 Signature:
Gottl. KERN & Sohn GmbH
management"
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
MLS-BA-defsi-0713
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3 Fundamental information (general)
3.1 Designated use
The balance you have acquired serves to determine the weighing value of the
material to be weighed. It is intended to be used as a “non-automatic“ balance, i.e.
the material to be weighed is manually and carefully placed in the centre of the
weighing plate. The weighing value can be read off after a stable weighing value has
been obtained.
3.2 Inappropriate use
Do not use the balance for dynamic weighing. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“ in the balance. (Example: Slowly
draining fluids from a container on the balance.)
Do not leave a permanent load on the weighing plate. This can damage the
measuring equipment. Be sure to avoid impact shock and overloading the balance in
excess of the prescribed maximum load rating (max.), minus any possible tare weight
that is already present.
This could cause damage to the balance.
Never operate the balance in hazardous locations. The series design is not
explosion-proof.
Structural alterations may not be made to the balance. This can lead to incorrect
weighing results, faults concerning safety regulations as well as to destruction of the
balance.
The balance may only be used in compliance with the described guidelines. Varying
areas of application/planned use must be approved by KERN in writing.
3.3 Protective measures
The moisture analyzer may only be connected to a properly installed socket with
protection conductor connection (PE). The protective effect must not be cancelled by
an extension cable without protection conductor. For power supply from mains power
without protection conductor connection, an equivalent protection complying with the
relevant installation regulations must be installed by an expert.
3.4 Danger Information
Individual case components (e.g. ventilation grid) may heat up considerably during
operation. Therefore only touch the appliance at the handles intended for this
purpose.
Sample materials that develop aggressive steams (e.g. acids) may result in corrosion
problems on parts of the appliance. The moisture analyzer should mainly be used for
drying substances containing water.
Explosive, combustible samples may not be analyzed using the moisture analyzer.
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3.5 Guarantee
Warranty claims are voided in case of
- non-observation of our guidelines in the operating instructions
- use outside the described applications
- alteration to or opening of the device
- mechanical damage and damage caused by media, liquids,
natural wear and tear
- inappropriate erection or electric installation
- overloading of the measuring equipment
3.6 Monitoring the test substances
The metrology features of the balance and any possible available adjusting weight
must be checked at regular intervals within the scope of quality assurance. For this
purpose, the answerable user must define a suitable interval as well as the nature
and scope of this check. Information is available on KERN’s home page (www.kern-
sohn.com) with regard to the monitoring of balance test substances and the test
weights required for this. Test weights and balances can be adjusted quickly and at a
reasonable price in KERN’s accredited DKD calibration laboratory (return to national
normal).
4 Fundamental safety instructions
4.1 Observe notices in the operating manual
Please read the operating instructions carefully before erecting and commissioning, even if you
already have experience with KERN balances.
4.2 Training of personnel
The device may only be operated and looked after by trained members of staff.
5 Transport and storage
5.1 Acceptance check
Please check the packaging immediately upon delivery and the device during
unpacking for any visible signs of external damage.
5.2 Packing
Please retain all parts of the original packaging in case it should be necessary to
return items at any time.
Only the original packaging should be used for return consignments.
Before despatch, disconnect all attached cables and loose/movable parts.
Apply any intended transport security devices. Secure all parts e.g. weighing plate,
mains power supply etc. against slipping and damage.
MLS-BA-defsi-0713
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6 Unpacking, installation and commissioning
6.1 Installation Site, Location of Use
The balance is constructed in such a way that reliable weighing results can be
achieved under normal application conditions.
By selecting the correct location for your balance, you will be able to work quickly and
precisely.
Therefore please observe the following at the place of installation:
- Place the balance on a firm, level surface;
- Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
- Protect the balance against direct draughts due to open windows and doors;
- Avoid jarring during weighing;
- Protect the balance against high humidity, vapours and dust;
- Do not expose the device to extreme dampness for longer periods of time.
Inadmissible bedewing (condensation of air moisture on the device) can occur
if a cold device is taken into a significantly warmer environment. In this case,
please acclimatise the device for approx. 2 hours at room temperature after it
has been disconnected from the mains.
- Avoid static charging of the material to be weighed, weighing container and
windshield.
Major display deviations (incorrect weighing results) are possible if electromagnetic
fields occur as well as due to static charging, currents and instable power supply. It is
then necessary to change the location.
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6.1.1 Assembly
Structure:
Sample plate
Extraction aid
Dish holder
Wind protection
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Use the foot screws to level the balance until the air bubble in the bubble level is in
the prescribed circle.
6.1.2 Scope of delivery
Standard accessories:
• Balance with moisture analyzer top piece
• Plate holder
• Extraction aid
• 10 Sample plates
• Mains cable
• Wind protection
• Instruction manual
6.2 Mains supply
Power is supplied via a mains cable.
Please check whether the voltage input of your balance is correctly set. The balance
may only be connected to the mains power if the information on the balance (sticker)
and the local mains voltage are identical.
Important:
Is the labeling (220 V 50Hz) the same as the local mains voltage?
- In case of different mains voltages do not connect!
- If the voltage is the same the balance can be connected.
6.3 Connection of peripheral equipment
The balance must be disconnected from the mains before connecting or
disconnecting additional equipment (printer, PC) to or from the data interface.
Only use KERN accessories and peripheral equipment with your balance. These
have been ideally coordinated to your balance.
Foot screw
Spirit level
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6.4 Connection of peripheral equipment
The balance must be disconnected from the mains before connecting or
disconnecting additional equipment (printer, PC) to or from the data interface. Only
use KERN accessories and peripheral equipment with your balance. These have
been ideally coordinated to your balance.
6.5 Initial Commissioning
The accuracy of the balance depends on the local acceleration of the fall.
Instructions in chapter "Adjustment" must be observed.
Before connecting the balance with the mains plug, make sure that the main switch is
in “off“ position.
When you have connected the balance with the mains plug bring the mains switch
(above mains plug) into “on“ position The balance is now turned on. The balance will
go through a test mode. After a few seconds “0.000“ is displayed.
6.5.1 Rear view
Main switch
Mains supply
Fuse
PS/2 keyboard
RS232 interface
Screw for attaching
the earth lead
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6.5.2 Display
Display during drying:
The display during drying contains all the important
Informationen:
1. Date
2. Time
3. Drying parameters: Profile /turn-off criteria / calculation method / output
interval
4. Processing time
5. Target temperature
6. Processing temperature
7. Diagram representing the active status
Su szenie
0.235
%M
09:28: 30
120
C 120 C
19/09/03
3
%M
30s
0:03:25
Drying 09:28: 30
4 6
21
5
3
7
7 Menu
The menu is organized into a user menu and an operator menu.
The user menu is activated with the -key, the operator menu
with the -key.
The following table shows all the functions of the menu.
MLS-BA-defsi-0713
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User menu
P1 Calibration
P1 01 External calibration
P1 02 User calibration
P1 03 Calibration test
P1 04 Temperature
calibration
P1 05 Print report Yes/no
P2 GLP
P2 01 User
P2 02 Project
P2 03 Print-out time Yes/no
P2 04 Print-out date Yes/no
P2 05 User print-out Yes/no
P2 06 Project print-out Yes/no
P2 07 Id print-out Yes/no
P2 08 Cal. print-out Yes/no
P3 Date/time
P3 01 Date format M/D/Y; D/M/Y
P3 02 Time format 12 h; 24 h
P3 03 Time
P3 04 Date
P3 05 Time display Yes/no
P3 06 Date display Yes/no
P4 Display
P4 01 Filter
very slow; slow; standard; fast,
very fast
P4 02 Autozero Yes/no
P4 03 Temperature
P5 RS-232
P5 01 Baud speed 2400; 4800; 9600; 19200
P5 02 Parity none, straight, odd
P5 03 Data bits 7 bits; 8 bits
P5 04 Stop bits 1 bits; 2 bits
P5 05 Handshake none; XON/XOFF; RTS/CTS
P5 06 Print-out at style Yes/no
P6 Edition
P6 01 Print-out no.
P6 02 Head line no.
P6 03.Line no.
P6 04 Foot note no.
P6 05 1. Print-out start
P6 06 1. Print-out stop
P6 13 1. Text
P6 14 2. Text
P7 Others
P7 01 ID code none or 8 characters
P7 02 Program bibl. 0 – off; 1 - on
P7 03 Signal 0 – off; 1 - on
P7 04 Language English, German
P7 05 Illumination 0 – off; 1 - on
P7 06 Contrast
P7 07 Balance no.
P7 08 Program no.
P7 09 Parameter print-out
P7 10 Parameter receiver
P7 11. Set ID
P7 12 Auto. ID print-out
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Operator menu
P00
P01
Name
Profile
Standard
Rapid
Gentle
Step
Dry temperature
Switch off
Automatic 1 (change of mass less than 1 mg in 20 s)
Automatic 2 (change of mass less than 1 mg in 50 s)
Automatic 3 (change of mass less than 1 mg in 120 s)
Automatic 4 (change of mass less than 1 mg in 180 s)
Automatic 5 (change of mass less than 1 mg in 240 s)
User defined (Δ mg, Δ t)
User defined 2 (Δ % / 60s) – range 0,001% - 9,999%
Test
Manual
Timed
Results
Moisture content %M
Grams
Percent Pork fat
Percent Beef fat
Chart
Ratio %R
Dry content %D
Print int
none; 1s; 2s; 3s; 5s; 10s; 20s; 30s; 1min; 2min; 3min; 5min
Target
none; Optional; Obligatory
T. coeficient
Default
Print
P02
Name
P99
Name
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7.1 User principle of the menu control
In the menu the settings of the balance can be modified and functions can be
activated. This way, the balance can be adjusted to individual weighing requirements.
To do so proceed as follows:
Operation/display: Specification
The overview for the operator menu is displayed
Use the
-key to leave the overview
The overview of the user menu is display
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Redout
Printouts
Global s
Setup29.12.04
Actuate
-key twice to leave the overview.
Menu selection using the arrow keys:
Select your setting using the cursor (►).
Use the
-key to move the cursor (►) down, the -key to
move it up
Setup29.12.04 Setup
Use the key to confirm the selected setting; the display shows
the sub-menu
or
or
Modification of functions and parameters
Use the arrow keys to move within and enter into the menu:
Use the
-keys to select parameters within a function or the
value for the selected numeral or number is increased /
decreased.
Use the
-key to move a menu item to the right or left.
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Confirmation of your settings
Changes of the display during drying process
There are 5 displays available
1. Drying method
2. Temperature of the heating chamber
3. Drying profiles
4. Result in %M; %D; %R – diagram
5. Lost weight
Actuate
-key again, a message will inquire whether you
want to save the changes you made.
Einstellungen
?
Save ? [Enter/E sc] setup
29.12.04
Setup
!
Saveing...
Einstellungen29.12.04
Actuating the
-key will save the selected setting.
If you do not want to save the selected setting press
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7.2 Operating the balance with PS/2 keyboard
Using a PS keyboard will help you to enter numbers and texts faster and easier.
Key allocation:
Balance keyboard
PS keyboard
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8 User menu
Access to the user menu is carried out with the -key.
The user menu has seven main menus, organized into the
following sub-menus:
P1
Calibration
P2
GLP
P3
Date/time
P4
Display
P5
RS-232
P6
Edition
P7
Others
Ext. Cal.
User Cal.
Cal. Test
Temp. cal
Print report
User
Project
Time print
Data print
User print
Proj. print
ID print.
Last cal.print
Data format
Time format
Time
Date
Display time
Display date
Filter
Autozero
Temperat.
Baud rate
Parity
Data bits
Stop bits
Handshake
Print on stable
Prinout.No.
Header No.
Header No.
Pr. 1 start
Pr. 1 stop
Pr. 2 start
Pr. 2 stop
Pr. 3 start
Pr. 3 stop
Pr. 4 start
Pr. 4 stop
String 1
String 2
String 3
.
String 78
String 79
String 80
Password
Program lib
Beep
Language
Backlight
Contrast
Balance Id
Softw. rev.
Par. Print.
Par. rec.
ID setting
ID autopr.
Main Menu
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Readout
Printouts
Globals
Setup
1 3 2
29.12.04
1. Menu number (P1 – P9)
2. Menu designation
3. Cursor (►) indicates the current menu item
Submenu:
Setup
1 5 2
8
7 3 4
6
1. Menu number (P1 – P9)
2. Parameter number and designation
3. Parameter value or ****** i.e. this parameter is
available as a function
4. Functional Description
5. Cursor (►) indicates the current menu item
(e.g. P1).
6. Cursor (►) indicates the current parameter (e.g.
06).
7. Status
8. Use the arrow key to modify the parameter
value, the active parameter blinks.
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8.1 Menu selection (weight calibration / temp. calibration etc.)
8.1.1 P1 Calibration (adjustment)
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated - in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location (
only if the balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out for the first commissioning, after each
change of location as well as in case of fluctuating environment temperature. It is
also recommendable to adjust the balance periodically during weighing operation in
order to obtain exact measured values.
Procedure for adjustment:
Observe stable environment conditions. A warming-up time of ca. 30 minutes for
stabilisation is necessary.
Important!
The sample plate should be put. During the adjustment process no objects should be
on the sample plate.
Operator Indication
Ö Call up menu item “P1 Calibration“
(see chapter 7.1)
Ö Push -button
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Redout
Printouts
Global s
Setup29.12.04
01 Ext. calibr. - Adjustment with an external weight
Ö Use the cursor (►) to select “01 Ext. calibr.“
Setup29.12.04 Setup
Ö Push -button
Ensure that there are no objects on the sample
plate.
MLS-BA-defsi-0713
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5
Ö Press -key; the display shows the measuring
value of the adjusting weight.
Ö Now place the adjusting weight in the center of the
weighing plate, press the -key. After successful
adjustment the system will automatically return to
the menu.
The -key can be used to cancel the adjustment.
In case of an adjustment error or incorrect adjusting
weight an error message is displayed. Repeat
adjustment.
Setup29.12.04 Setup
Ö Actuate -key twice
Ö Use the -key to confirm; the balance will
automatically return to weighing mode
Ö
02 User calibr. – user-defined adjusting weight
Ö Use the cursor (►) to select “02 User cal.“
Ö Press -key; the display shows the measuring
value of the adjusting weight. The first numeral of
the displayed value blinks. You can modify it using
the arrow keys.
After setting your new adjusting weight use the key to confirm.
Ö Ensure that there are no objects on the weighing
plate. Push -button
MLS-BA-defsi-0713
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Ö The display will show the weighing value for the
adjusting weight set by you
Ö Now place the adjusting weight in the center of the
weighing plate, press the key. After successful
adjustment the system will automatically return to
the menu.
Remove adjusting weight.
The -key can be used to cancel the adjustment.
In case of an adjustment error or incorrect adjusting
weight an error message is displayed. Repeat
adjustment.
Ö Actuate -key twice
Ö Use the - key to confirm; the balance will
automatically return to weighing mode
We recommend:
Carry out adjustment as close to the maximum load of the balance as possible.
Information concerning the test weights is available at:
http://www.kern-sohn.com
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03 Calibration test
Here, deviation from the last adjustment is determined. This is only a check, i.e.
no values are changed.
Ö Use the cursor (►) to select “03 Calibr. test“
Setup29.12.04 Setup
Ö Push -button
Ensure that there are no objects on the weighing
plate.
Einstellungen
Calibration check
Cear the pan
[Enter]
Ö Press -key; the display shows the measuring
value of the adjusting weight.
Einstellungen
Calibration check
Weight measuring
Einstellungen
Calibration check
Load weigh
[Enter]
t 50.0g
Ö Now place the adjusting weight in the center of
the weighing plate, press the key.
The result of the calibrating test is displayed.
Einstellungen
Calibration check
Weight measuring
Calibration
Check results
Cal.: 180.1354
Act.: 180.1438
Diff.: - 0.0084
Ö Remove weight; actuate the -key
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04 Temperature calibration
We recommend to check the temperature value of the MLS50-3 from time to time.
Before the MLS50-3 should have cooled down at least 3 hours after the last heating
phase. Clamp the temperature sensor (e.g. MLS-A03) in the respective support on
the left side. Push the temperature sensor as close as possible to the thermic sensor
of the MLS.
The temperature is mesaured at two points and can be corrected at the two
temperature points.
1. Carrying out with Temperature calibration set MLB-A03
Ö Use the cursor (►) to select
„04 Temp. calibr.“
Setup29.12.04 Setup
Ö Push -button
The temperature calibration is started.
After 14.59 Min the temp. calibration of the 1. point is
finished.
Ö Select the keys and to correct the
temperature value as necessary (e.g.24/22).
Ö In order to take over the temperature values
press -key, than the temp. calibration for the 2.
point is started.
After 14.59 Min the temp. calibration of the 2. point is
finished.
Ö Select the keys and to correct the
temperature value as necessary (e.g.124/120).
Ö Press key to take over the temperature
values.
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2. Carrying out with AUTO-Temperature calibration set MLS-A01
• Temperature calibration
If you only need to measure the temperature within the MLS (only calibration),
then carry out the procedure as described under chapter 6 "Temperature
adjustment”, without connecting the RS 232 interface.
• Temperature adjustment
The temperature will be measured at two points and will be automatically
adjusted.
To adjust the temperature the following settings are required on the MLS-A01:
Switch on the device with the key. The device
carries out a self-test. All symbols are shown in the
display:
Note:
When calibrating the temperature, the automatic switch-off function must be
deactivated as follows:
Keep pressing the
key until the time is
displayed
25.2
°C
z
timetempalarm
L
.
.
2608
°14
timetempalarm
Keep pressing the key until A.OFF and the
current switch-off time is displayed.
To deactivate the function use the
or
keys
to set the switch-off time to 1.
A.OFF
°1
z
timetempalarm
CAL
time temp
ppm ppt
uMM/l
mV mS
pH uS
%mg/l
REL
alarm
-
8
8 8 8 1
.
.
.
. . .
E1E2E3
k
8 8 8 8 1
.
.
.
. . .
C
%
cm
-1
P6 P4 P3 P2 P1
MLS-BA-defsi-0713
9
0
Press the
key.
A.OFF
°----
timetempalarm
Press the
key. The automatic switch-off
function is now deactivated.
Keep pressing the
key until the temperature is
displayed.
.
.
2608
°14
timetempalarm
L
25.2
°C
z
timetempalarm
When measuring the temperature, press the
key and hold until the following display flashes.
24.55
(
12.23
(
3.22
(
n0.16
Press the
key again. ---- is displayed
----
Press the key
SER OFF
Press the key
PRT ON
Press the key
ALL ON
Keep pressing the
key until ----is displayed
----
Press the
key. The current temperature is
displayed
24.55 °C
MLS-BA-defsi-0713
91
To adjust the temperature the following settings are required on the MLS
moisture analyzer:
When using the MLS-A01 temperature calibration set, the baud rate of the MLS must
be set to 9600 as described below:
Ö Switch on the moisture analyzer
Ö
Press the
key.
Ö Using the key, select menu item "P5 RS
232"
Ö
Press the
key.
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Redout
Printouts
Global s
Setup
Ö Using the cursor (►) select your settings as
"01 Baud rate"
Ö
Press the
key. The current menu item will
flash
Set the baud rate to 9600 using the arrow keys
Setup
P5
01 B ud rate
02 Parity
03 Data bits
04 Stop bits
05 Handshake
a
06 Print of stab
0
0
2
0
9600
8 bits
1 bit
2
1
none
none
none
29.12.04
Ö Confirm with the key
Ö
Press the
key. The balance returns to the
menu
Ö Using the key, select the parameter "P1
Kalibrierung"
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Redout
Printouts
Global s
Setup29.12.04
Ö Using the key, select the parameter "04
Temp.kal"
Setup29.12.04 Setup
Ö
Press the
key.
The temperature calibration will begin.
After 14:59 minutes, temperature calibration for the
first point is complete.
The temperature value is adjusted automatically.
MLS-BA-defsi-0713
92
Ö Temperature calibration for the second point will
then begin.
After 14:59 minutes, temperature calibration for the
second point is complete.
The temperature value is adjusted and saved
automatically.
The balance returns to weighing mode
automatically.
L
L
Note:
The colour of the measuring sensor must be identical to that of the sensor point (e.g.
black sensor point - black measuring sensor)!
Sensor
point
MLS-BA-defsi-0713
93
05 Print report
In this menu item you can activate the function for printing your calibrating data
Ö Use the cursor (►) to select “05 “Print report “
Ö Press the -key; the current menu item blinks.
Use the arrow keys (see chapter 7.1) to save your
settings
0 Print report deactivated
1 Print report activated
Setup29.12.04 Setup
Ö Confirm by pressing the -key
Ö If Print report is activated you will receive a log of your adjustment data after
each adjustment (example):
*** External calibration report ***
Calibr. : External
Diff.. : -0.0624 g
Signature………………………….
MLS-BA-defsi-0713
94
8.1.2 P2 GLP (Good laboratory practice)
Quality assurance systems require printouts of weighing results as well as of correct
adjustment of the balance stating date and time and balance identification. The
easiest way is to have a printer connected.
Definition of a standard log:
Operator Indication
Ö Call up menu item “P2 GLP“ (see chapter 7.1)
Ö Push -button
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Redout
Printouts
Global s
Setup29.12.04
01 User
Ö Use the cursor (►) to select menu item “01 User“
Ö Push -button
Ö Enter user name or number (max. 8 characters)
using the arrow keys (see chapter 7.1); the
respective active position blinks
Setup
P2
01 User
02 Pr
03 Time print
04 Date print
05 User print
oject
ojekt
Last Cal
06 P print
07 Id print
08 Print
WX/235
0
1
Nowak
0
1
1
0
off
on
off
on
on
off
31.01.05
Ö Confirm by pressing the -key
02 Project
Ö Use the cursor (►) to select “02 Project “
Ö Push -button
Setup
P2
01 User
02 Pr
03 Time print
04 Date print
05 User print
oject
ojekt
Last Cal
06 P print
07 Id print
08 Print
WX/235
0
1
Nowak
0
1
1
0
off
on
off
on
on
off
31.01.05
Ö Enter project name or number (max. 8 characters)
using the arrow keys (see chapter 7.1); the
respective active position blinks
Ö Confirm with -key
All other settings (03 – 08) are carried out in the same
way.
MLS-BA-defsi-0713
9
5
All the settings to be printed must be activated with “1 / yes“.
Example 1:
Settings Print
P2 03 Time print
1 yes
P2 04 Date print
1 yes
P2 05 User print
1 yes
P2 06 Project print
1 yes
P2 07 ID print
1 yes
P2 08 Last Cal. print
1 yes
Example 2:
Settings Print
P2 03 Time print
0 no
P2 04 Date print
1 yes
P2 05 User print
1 yes
P2 06 Project print
0 no
P2 07 ID print
1 yes
P2 08 Last Cal. print
0 no
Date: : 18.01.05
Time: : 10:41:05
User: Miller
Project: : AB/007
Balance no. : WL 041078
----------------------------
18.01.05 07:48
Automatic calibration
Dev. : 0.003[5] g
-----------------------------------
10.429[0] g
Date: 22/10/2004
User : Miller
Balance no.: 10
---------------------------------------
13.0521 g
MLS-BA-defsi-0713
9
6
8.1.3 P3 Date/time
In this menu item you can call up output and formatting of
Set date and time.
Operator indication
Ö Menu item “P3 Date/time“ (see chapter 7.1)
Ö Push -button
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Redout
Printouts
Global s
Setup29.12.04
01 Date format
Ö Use the cursor (►) to select menu item
“01 Date format“
Ö Press the -key; the current menu item blinks.
Ö Use the -button to choose between the following
settings:
1 Month/Day/Year
0 Day/Month/Year
Setup
P3
01
02
03
04
05
Date forma t
Time for mat
Time
Date
Disp. time
Date06 Disp.
1
1
0
1
DA /MO/Y R
24 Std.
********
Function
********
On
On
Function
29.12.04
Ö Confirm by pressing the -key
02 Time format
Ö Use the cursor (►) to select menu item
“02 Time format“
Ö
Press the -key; the current menu item blinks.
Ö Use the -button to choose between the following
settings:
0 24 hours
1 12 hours (PM/AM)
Setup
P3
01
02
03
04
05
Date forma t
Time for mat
Time
Date
Disp. time
Date06 Disp.
1
1
0
1
DA /MO/Y R
24 Std.
********
Function
********
On
On
Function
29.12.04
Ö Confirm by pressing the -key
MLS-BA-defsi-0713
9
7
03 Time
Ö Use the cursor (►) to select menu item “03 Time“
Setup
P3
01
02
03
04
05
Date forma t
Time for mat
Time
Date
Disp. time
Date06 Disp.
1
1
0
1
DA /MO/Y R
24 Std.
********
Function
********
On
On
Function
29.12.04
Ö Push -button
Ö Use the - or - key to control your selection
Ö Use the -key to confirm your selection (e.g.
hours), the current menu item blinks.
Ö Use the -key to increase the value, the -key to
decrease.
Ö Use the - and -keys to select the place to be
changed (the respective active place blinks).
Ö Use the -key to confirm your selection (e.g.
hours).
Ö To change minutes and seconds proceed in the
same way.
Ö Use the -key to confirm; the balance will now
show the time set by you.
04 Date
Ö Use the cursor (►) to select menu item “04 Date“
Setup
P3
01
02
03
04
05
Date forma t
Time for mat
Time
Date
Disp. time
Date06 Disp.
1
1
0
1
DA /MO/Y R
24 Std.
********
Function
********
On
On
Function
29.12.04
Ö Push -button
Setup
Year 200
Mo 11
10
4
nth
Day
APRIL 2004
Setup
29.12.04
Ö All other settings are the same as for entering time
(03 Time).
MLS-BA-defsi-0713
9
8
05/06 Disp. Time/Date
Ö Use the cursor (►) to select menu item
“05/06 Disp. Time/date“
Ö Press the -key; the current menu item blinks.
Ö Use the -button to choose between the following
settings:
0 Time/date is displayed in status bar
1 Time/date is not displayed in status bar
Setup
P3
01
02
03
04
05
Date forma t
Time for mat
Time
Date
Disp. time
Date06 Disp.
1
1
0
1
DA /MO/Y R
24 Std.
********
Function
********
On
On
Function
29.12.04
Ö Confirm by pressing the -key
8.1.4 P4 Readout
Operator Indication
Ö Call up menu item “P4 Readout “ (see chapter 7.1)
Ö Push -button
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Readout
Printouts
Global s
Setup
01 Filter
Ö Use the cursor (►) to select menu item “01 Filter“
Ö Press the -key; the current menu item blinks.
Ö Use the - and - keys to select between the
following settings:
1 Very quiet and stable environment:
Balance works very fast but is more
sensitive to external influences
5 Busy environment:
Balance works more slowly but is less
sensitive to outside influences
SetupSetup
29.12.04
Ö Confirm by pressing the -key
MLS-BA-defsi-0713
99
02 Autozero
Ö Use the cursor (►) to select menu item
“02 Autozero“
Ö Press the -key; the current menu item blinks.
Ö Use the - and -keys to select between the
following settings:
0 Deviations from the Zero display are
not automatically tared.
1 Deviations from the Zero display are
automatically tared.
SetupSetup
29.12.04
Ö Confirm by pressing the -key
03 Temperature
Ö Use the cursor (►) to select menu item
“03 Temperature“
Ö Push -button
SetupSetup
29.12.04
Ö The sample room temperature is displayed
Ö Use the -key to return to the menu
SetupSetup
29.12.04
MLS-BA-defsi-0713
10
0
8.1.5 P5 RS-232
In this menu item you can save your settings for the interface.
Operator indication
Ö Call up menu item “P5 RS-232“ (see chapter 7.1)
Ö Push -button
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Redout
Printouts
Global s
Setup
01 – 06 Parameter selection
Ö Use the cursor (►) to select your setting (01 – 06)
Ö Press the -key; the current menu item blinks.
Use the arrow keys (see chapter 7.1) to save your
settings
Setup
P5
01 B ud rate
02 Parity
03 Data bits
04 Stop bits
05 Handshake
a
06 Print of stab
0
0
2
0
9600
8 bits
1 bit
2
1
none
none
none
29.12.04
Ö Confirm by pressing the -key
8.1.6 P6 Printout
In this menu item you can select between 5 different types of data output:
Operator Indication
Ö Call up menu item “P6 Printout “
(see chapter 7.1)
Ö Push -button
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Redout
Printouts
Global s
Setup
MLS-BA-defsi-0713
101
01 Printout no.
Ö Use the cursor (►) to select menu item
“01 Printout no.“
Ö Press the -key; the current menu item blinks.
Ö Use the - and - keys to select between the
following settings:
0 standard
1 1. Print
4 4. Print
Ö Use the -key to confirm your selection
8.1.6.1 Standard-data output (0 standard)
Data output is carried out by actuating the -key.
Definition of the log header is executed in menu item “P2 GLP“.
Examples in weighing mode:
*: ? = instable measuring value
Date: 22/10/2004
Time: 13.04.23
User: Miller
Project: XW/456
0.008 g
Date: 22/10/2004
Time: 13.16.49
User: Miller
Project: XW/456
Balance: 10
? 62.685 g *
MLS-BA-defsi-0713
102
Example in drying mode:
⎬
Header
⎬
Line
------------------- Start drying------------------Program nb : 1
Name: Floar 100
Profiles standard
Dry temp. : 120 °C
Switch off : Automatical 3
Result : Moisture contents - %M
Printout int : 30 s
Target : None
T. coeficient : 0.00
Start weight : 9,993 g
0:00:30 0.01 %M
0:01:00 0.02 %M
0:01:30 0.03 %M
Final mass : 9,990 g
Dry time : 0:01:45
Final result : 0.03 %M
--------- End of drying procedure ---------
⎬
Footer
8.1.6.2 User-defined data output (1 printout 1 ↔ 4. Print)
Here you can define 4 different kinds of data output.
Ö The content of the data output is defined as follows.
First line 1. Printout 1 start -.1, i.e. text begins at line 1 (1. text)
Last line 1. Printout stop - 20, i.e. text ends at line 20 (20. text)
Ö Text input per line is carried out via the arrow keys (see chapter 7.1) in the
respective strings.
1. Text Start of text input
20. Text End of text input
During text input lines may overlap, e.g.:
1. Print-out start – 1
1. Print-out stop – 40
2. Print-out start – 20
2. Print-out stop – 40
MLS-BA-defsi-0713
103
Text input:
• Max. 640 characters
• 80 lines
• 8 characters per line
Ö After each line confirm your text input using the -key.
Ö After complete text input press the
-key; this is followed by an inquiry whether
you want to save your setting.
Ö Use the
-key to confirm (see chapter 7.1).
Apart from flow text (characters, numbers and numerals) the following variables
are stored in the menu:
General variables
%%
Printout of 1 character “%”(i.e. in order to print out 1 character % two %%
have to be entered)
%N
Net weight
%d
Current date
%t
Current time
%i
Balance ID-no.
%r
Program no.
%P
Project number.
%U
User no.
%k
Date and time of last adjustment
%K
Type of last adjustment
%I
Deviation from last adjustment
%1
Code 1
%2
Code 2
%3
Code 3
%4
Code 4
%5
Code 5
%6
Code 6
MLS-BA-defsi-0713
104
Print related variables
\\
Printout of 1 character “ / ”(i.e. in order to print out 1 character / two //
have to be entered)
\c
CRLF (carriage return line feed) Beginning of line next line
\r
CR (carriage return) beginning of line
\n
LF (line feed) next line
\t
Tabulator
\s
Next “string”
\0
End of data input
Variables in drying mode
%C
Temperature sample room
%M
Result - wet
%D
Result - dry
%R
Result – wet/dry
%N
Results
%c
Drying time
%S
Starting value sample
%E
Finishing value sample
%P
Parameter of drying process
The variables are entered by using the arrow keys.
MLS-BA-defsi-0713
10
5
Examples for text input in weighing mode:
Example 1: Max mass can not exceed 11.250 g!
Text Parameter No.
1 2 3 4 5 6 7 8
20 String 10 M a x m a s s
21 String 11
c a n n o t
22 String 12
e x c e e d
23 String 13 1 1 . 2 5 0 g
24 String 14
!
25 String 15
Example 2: Kern & Sohn GmbH
Datum:
Zeit:
Gewicht:
*****Unterschrift:……….
*** Aktueller Modus***
Text Parameter No.
1 2 3 4 5 6 7 8
26 String 16 K e r n & S
27 String 17 o h n G m b H
28 String 18 \ c D a t u m :
29 String 19 % d \ c Z e i t
30 String 20 : % t \ r \ n G
31 String 21 e w i c h t : %
32 String 22 N \ c \ c * * *
33 String 23 * * U n t e r s
34 String 24 c h r i f t : .
35 String 25 . . . . . . .
36 String 26 . . \ c * * % F
37 String 27 * * * \ c \
MLS-BA-defsi-0713
10
6
Examples for text input in drying mode
Parameter selection:
Header – 2. Printout (menu item P6 01 header no.)
Line – 3. Printout (menu item P6 01 line no.)
Footer – 4. Printout (menu item P6 01 footer no.)
2. Print
3. Print
4. Print
* string = Text
Print:
⎬
Header
⎬
Line
Start of the measurement
Date 27:11:2003
Time 11:27
Dryling parameters.
Program number : 3
Name Floar 100
Profiles standard
Dry temperature : 120 °C
Switch off : Automatic 3
Result : Moisture contents %M
Printout int : 30 s
Target : none
T. coeficjent : 0.00
Start weight 5.433 g
0:00:30 0.53 %M 5.031 g
0:01:00 2.02 %M 4.636 g
0:01:30 3.18 %M 4.254 g
Final mass : 4,090 g
Dry time: 0:01:45
Final result: 4.01 %M
Finish measurement
Signature:……………
⎬
Footer
MLS-BA-defsi-0713
10
7
8.1.7 P7 General functions
Operator indication
Ö Call up menu item “P7 Globals“ (see chapter
7.1)
Ö Push -button
P1 alibration
P2 GLP
P3 D
P5 RS-232
P6
P7
C
ate/Time
P4 Readout
Printouts
Global s
Setup
01 -12 Parameter selection
Ö Select parameter „01 - 12“ with - and - key
P9
01
02
03
04
05
Password
Prog.library
Beep
Language
Backlight
Contrast
Balance Id
Software rev.
printout
receive
ID setting
12 Id autoprint
06
07
08
09
10
11
Par.
Par.
1
1
On
1
On
Function
On
On
********
********
un tionFc
un tionFc
Einstellungen29.12.04
********
Wl04305
MXA0.40
********
********
un tionFc
un tionFc
1
1
On
01 Password
Password protection
02 Prog. library
Program overview
03 Beep
Tone on/off
04 Language
User guidance selectable in German, English and Spanish
05 Backlight
Back lighting of the display on/off
06 Contrast
Contrast of the display
07 Balance Id
Balance identification no.
08 Software rev.
Software issue
09 Par.printout
Balance parameters are printed out
10 Par.receive
not proved by documents
11 ID setting
Entering a user code
12 ID autoprint
User code can also be printed
Ö Press the -key; the current menu item blinks.
Ö Use the - and - key to activate/deactivate parameters, confirm your selection
pressing the -key
MLS-BA-defsi-0713
10
8
9 Operator menu
Execution of a moisture determination
On the following pages the setting of the individual drying parameters and the
execution of a drying process is described.
Important drying parameters:
¾ Drying profiles (Temperature, time)
¾ Criteria for completing the drying process
¾ Selection displayed calculation result
¾ Output interval
9.1 Program library
The MLS50-3 has a memory for drying processes! This memory (library) can store 99
drying processes. The completed processes can be simply called up and started from
the library. Activating the program library:
Operator Indication
Ö Push -button
Ö Actuate the -key; use the cursor (►) to select
setting “P7 Other“
Ö Push -button
Ö Push -button
Ö Actuate -key; use the cursor (►) to select
setting “P7 02 program library“
Ö Actuate the -key; the setting in the function will
start blinking. Use or to change the setting
between “1=yes“ and “0=no“.
Ö Select setting “1=yes“
Ö Push -button
Ö Actuate -key twice now
Ö Use the -key to save the setting; with the -
key the old setting remains valid.
MLS-BA-defsi-0713
109
As soon as you have activated the “program library“ you will be taken into the
program library whenever you start a drying process.
To deactivate it you must first switch the previously set selection “1=yes“ to
“0= no“.
In the library the following parameters can be stored:
¾ Sample name (e.g. powder)
¾ Profile of the heating method (e.g. Soft)
¾ Drying temperature
¾ Conclusion
¾ Results
¾ Output interval
¾ Size of the sample (g)
¾ Correction value
Allocate library parameters:
Operator Indication
Ö Actuate the -key to
open the library
Ö Actuate -key, use the
cursor (►) to select the
desired position of the
process
Ö Push -button
Ö Push -button
Ö Actuate -key, use the
cursor (►) to select the
desired setting.
Ö Actuate the -key (e.g.
name)
Ö Use the keys ,
and (Enter) to enter
the sample name.
MLS-BA-defsi-0713
11
0
9.2 Select heating profile
The user can determine which heating profile is to be used.
Operator Indication Explanation
Ö Actuate -key, use the
cursor (►) to select the
desired setting.
Ö Actuate the -key
(Standard + temperature)
Ö The temperature is
increased quickly and is
kept at a constant level
Ö The temperature is
increased quickly and
exceeds the set value for
a short period. After that
the temperature is
lowered to processing
temperature and kept at
this level until the end of
the process.
Ö The temperature is
increased slowly.
Ö The temperature can be
increased in increments.
Number and size of the
increments can be
selected.
Ö Push -button
Ö Actuate -key twice now
Use the -key to save the setting; with the -key the old setting remains valid.
All parameters are set in this way. For details see
chapter 10 “Set drying parameters “.
MLS-BA-defsi-0713
111
9.3 Select turn-off criterion
The user can determine which turn-off criteria are to be used
Operator Indication
Ö Actuate -key, use the cursor (►) to
select the desired setting.
The following turn-off criteria are available:
Ö Turn-off when weighing value changes <
1mg within 120s
Ö Turn-off when weighing value changes
< 1mg within 240s
Ö Turn-off when weighing value changes
< 1mg in freely defined intervals
Ö Turn-off when weighing value changes
Percent range between 0,001% and 9,999%
Ö Turn-off when weighing value changes
< 1mg in freely defined intervals
Ö Turn-off drying process manually
Ö Turn-off drying process time-controlled
Push -button
Actuate -key twice now
Use the -key to save the setting; with the -key the old setting remains valid.
MLS-BA-defsi-0713
112
9.4 Select calculation method
The user can determine which calculation method is displayed and printed (Printer).
Operator indication
Ö Actuate -key, use the cursor (►) to select
the desired setting.
Ö Define output data
The following output data are available:
Calculation according to proportion of moisture
Ö Calculation according to ATRO
Ö Calculation according to “ g “ lost moisture
Ö Calculation according to proportion of dry
matter
Ö Calculation according to proportion of
moisture, display in diagram
Ö Calculation according to fat content
(pork)
Ö Calculation according to fat content
(beef)
MLS-BA-defsi-0713
113
9.5 Select interval of data output
The user can determine which interval is used for data output.
Operator indication
Ö Actuate -key, use the cursor (►) to select the
desired parameter (e.g. “Printout interval“)
Ö Actuate the -key to open selection “Printout
time“
The following selection criteria are available:
Ö Printout after 1 second – 5 minutes selectable
Ö No printout
Select and save settings:
Use the , keys and (Enter) to select the
desired printout times.
MLS-BA-defsi-0713
114
9.6 Enter target weight of the sample
The user can enter a target weight with tolerance range of the probe.
This entry makes it possible to use identical sample sizes for each drying process.
Operator Indication
Ö Actuate -key, use the cursor (►) to select the
desired parameter (“sample“);
Ö Actuate -key to open the selection “sample“
Ö If the setting is no, this function is not active.
Ö If the setting is active the sample size and the
tolerance range of the sample dosing can be
entered (%)
MLS-BA-defsi-0713
11
5
9.7 Determine correction factor and enter
Certain materials emanate more heat than is contributed from outside.
In order to obtain a faultless measuring result a correction is necessary in such a
case.
This setting allows the user to correct differences between the set temperature of the
moisture analyzer and the actually measured temperature on the test item.
Determination of the correction factor:
The balance is in normal weighing mode. Put a test quantity onto the sample plate.
Place the sample plate onto the dish receptacle.
Plug a thermic sensor through the opening at the left side of the heating attachment.
Close the heating attachment. Now try to get the sensor as close as possible to the
test material on the sample plate.
Start now the drying process and compare the regulated temperature on the MLS503 and the read temperature on the temperature sensor.
Please calculate the correction factor according to the following formula:
Formula: T (measured) – T (adjusted)
Correction = --------------------------------------------- T (adjusted)
Example: The measured temperature is 121°C, the temperatur set is
110°C, the correction is 0,11.
Typical materials with high temperature irradiation:
Material Selected
temperature
Measured
temperature
Correction value
Flour
100°C 103.7°C 0,04
Coal dust
100°C 122°C 0,22
Humid tea leaves
100°C 120.5°C 0,20
Dry tea leaves
100°C 108.5°C 0,08
Cement
100°C 121°C 0,21
Determination of the correction factor:
Operator Indication
Ö Actuate
-key, use the cursor (►) to select the
desired parameter (“correction factor“)
Ö Press
-key, entering the correction factor is
enabled
Select and save settings: Use the , keys and (Enter) to select the desired
printout times.
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9.8 Select standard setting
In this setting all sample values (temp., profile, etc..) are switched to values preset in
MLS50-3.
Operator Indication
Ö Actuate -key, use the cursor (►) to select the
desired parameter (“standard“)
Ö Actuate the -key, selection “standard“ is
activated
Use the key to accept the standard setting for the sample; with the key the old
setting remains valid.
10 Call up data from the program library:
Operator Indication
Turn on MLS50-3 on main switch (rear side)
Ö Actuate the -key to open the library
Ö Actuate the -key, use the cursor (►) to select
the saved process
Ö Push -button
Ö All set values are displayed.
Ö Moisture analyzing can be started with the -
key.
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11 Set drying parameters
If the program library is deactivated the parameters can be freely entered.
11.1 Select profile
Operator Indication
Ö Turn on MLS 50-3 on main switch (rear side)
Ö Press the -key
Ö Actuate the -key, selection profiles is opened
Ö Actuate the -key, use the cursor (►) to select
the desired parameter (e.g. “Profile“)
Ö Push -button
Select and save settings:
Use the
, keys and (Enter) to select the
desired heating method.
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11.2 Select finishing criterion
Operator Indication
Ö Actuate the -key, use the cursor (►) to select
the desired parameter (e.g. “Conclusion“)
Ö Actuate the - key, selection “Finishing
criteria“ is opened
The following turn-off criteria are available:
Ö Turn-off when weighing value changes < 1mg
within 120s
Ö Turn-off when weighing value changes < 1mg
within 20s
Ö Turn-off when weighing value changes
< 1mg within 240s
Ö Turn-off when weighing value changes
< 1mg in freely defined intervals
Ö Turn-off when weighing value changes
Percent range between 0,001% and 9,999%
Ö Turn-off when weighing value changes < 1mg
Ö Turn-off drying process manually
Ö Turn-off drying process according to time (30
seconds)
Select and save settings:
Use the , keys and (Enter) to select the
desired conclusion criteria.
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11.3 Select result calculation
Operator Indication
Ö Actuate the -key, use the cursor (►) to select
the desired parameter (e.g. “Result“)
Ö Actuate the - key, selection “Types of result
representation “ is opened
The following types of result representation are
available:
Ö Calculation according to proportion of moisture
Ö Calculation according to ATRO
Ö Calculation according to “ g “ lost moisture
Ö Calculation according to proportion of dry matter
Ö Calculation according to proportion of moisture,
display in diagram
Ö Calculation according to fat content
(pork)
Ö Calculation according to fat content
(beef)
Select and save settings:
Use the , keys and (Enter) to select the
desired conclusion criteria.
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11.4 Select output interval
Operator Indication
Ö Actuate the -key, use the cursor (►) to select
the desired parameter (e.g. “Printout interval“)
Ö Actuate the
- key to open selection “Printout
time“
The following selection criteria are available:
Ö Printout after 1 second – 5 minutes selectable
Ö No printout
Select and save settings:
Use the , keys and (Enter) to select the
desired printout times.
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12 Carry out drying
As soon as the drying parameters for the sample to be tested are set drying can
start.
Operator Indication
Ö Press the -key
Ö When using the sample plates the dish holder
serves as a protection from burning or pollution
Ö Put on empty sample plate and actuate the -
key
Ö Open lid
Ö Insert sample plate with sample
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Ö Close lid
Ö Drying will start automatically as soon as
the balance is at rest.
Ö The processing parameters (target temperature,
processing parameters, processing time,
calculation method, etc. ) can be read on the
display.
Ö The key allows to select between the various
calculation methods.
Ö The display shows when the dying process is
completed.
Ö The final result can be read on the display
Output processing result by actuating the key.
Example:
------------------- Start drying------------------Program nb : 1
Name: Floar 100
Profiles standard
Dry temp. : 120 °C
Switch off : Automatical 3
Result : Moisture contents - %M
Printout int : 30 s
Target : None
T. coeficjent : 0.00
Start weight : 9,993 g
0:00:30 0.01 %M
0:01:00 0.02 %M
0:01:30 0.03 %M
Final mass : 9,990 g
Dry time : 0:01:45
Final result : 0.03 %M
--------- End of drying procedure ---------
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13 General issues concerning moisture analyzing
13.1 Application
Wherever in a manufacturing process moisture is extracted from or added to
products, fast determination of the moisture content is immensely important. For
innumerable products the content of moisture is a quality feature as well as an
important cost factor. When dealing with industrial or agricultural products as well as
chemical products or products from the food industry, fixed limits often apply for the
content of moisture, which are defined in supply agreements and standards.
13.2 Sample material
Samples with the following characteristics can generally be analyzed easily:
♦ Grainy to powdery solids that can be poured
♦ Thermally stable materials that emanate the moisture to be analyzed easily,
without evaporating the other substances
♦ Liquids that evaporate to dry matter without formation of film
It may be difficult to analyze a sample that is:
♦ Viscous/sticky
♦ Tends to form a crust or a film when drying
♦ Disintegrates easily when heated or emanate various
components
13.3 Sample preparation
In many cases, special sample preparation is not necessary. However, coarse solids,
e.g. kernels or grains should be ground.
The duration of the drying process as well as the achievable exactness are
considerably influenced by the distribution of the sample. This results in two
requirements working in opposite directions:
The lighter the poured material, the shorter is the time the drying process will take;
and the heavier the poured material the more exact the result will be.
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Sample distribution:
Solids
Distribute powdery and grainy samples evenly on the sample
plate.
Crush samples with coarse grains (ground, crush)
Liquids
Thinly spread viscous and sticky samples. It is recommended to
uses glass fiber filters.
Weight loss due to splashing can be avoided by covering the
sample with a glass fiber filter. If glass fiber filters are used their
weight must be tared out.
13.4 Drying temperature
The following influencing factors must be considered when setting the drying
temperature:
Surface of the sample:
Liquid and spreadable samples have, unlike powdery and grainy samples, a smaller
surface to conduct thermal energy.
Using a glass fiber filter improves the absorption of heat.
Color of the sample:
Light colored samples reflect more thermal radiation than dark colored ones;
therefore they require a higher drying temperature.
Availability of volatile substances:
The better and faster water or other volatile substances are available the lower you
can set the drying temperature. If water is not easily available (e.g. in plastics), water
must be forced out at a high temperature (the higher the temperature, the higher the
steam pressure).
The same results as with other moisture analyzing methods (e.g. drying cabinet) can
be reached by optimizing setting parameters, such as temperature, heating level and
turn-off criteria experimentally.
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13.5 Description of the heating methods
There are 4 heating profiles:
• standard
• fast speed
• soft
• step drying
Standard drying
Standard drying is the most commonly used drying process.
This type of heating is suitable for most substances.
Soft drying
Soft drying is intended for substances that do not tolerate
heating by means of heating lamps. There are also
substances that form a film when heated quickly; this film
influences the evaporation process of the enclosed moisture.
For substances of this kind soft heating is also suitable.
Fast drying
Fast heating can be used for samples with a moisture content
of between 5% and 15%. The temperature is increased very
quickly and briefly exceeds the set drying temperature. Then
the temperature is regulated down to the set temperature. The
sample must contain sufficient moisture.
Step drying
Step drying can be used for substances that show specific
behavior during drying. The individual increments regarding
duration or temperature increase can be freely selected. The
samples should contain at least 15% moisture.
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13.6 Application table (recommendations/ reference values)
Prepare standard sample:
- If necessary, crush sample and spread evenly in the aluminum dish.
Prepare special samples:
- For sensitive samples or materials that are difficult to spread (e.g. mercury) a
glass fiber filter may be used.
- Spread sample evenly on glass fiber filter and cover with a second glass fiber
filter.
- The glass fiber filter may also be used as protection for materials that tend to
splash (each splash will falsify the final result).
MATERIAL Test item
weight
g)
Drying
temperature
(º C)
Data inquiry
interval
(s)
% Moisture %
solids
Drying time
(min)
Dry piece of
apple
5-8 100 10 76.5 10-15
Moist piece
of apple
5-8 100 10 7.5 5-10
Butter 2-5 138 15 16.3 4.5
Mustard 2-3 130 20 76.4 10
Ground
coffee
2-3 106 5 2.8 4
Cornflakes 2-4 120 15 9.7 5-7
Yogurt 2-3 110 15 86.5 4.5-6.5
Cocoa
powder
2-3 106 20 0.1 2
Margarine 3-4 138 20 16 10
Milk powder 2-4 90 15 5 6
Red wine 3-5 100 15 97.4 15-20
Sunflower oil 10-14 138 20 0.1 2
Sugar 4-5 138 15 11.9 10
Milk 2-3 120 15 88 6-8
Flour 8-10 130 10 12.5 4-5
Cement 8-12 138 15 0.8 4-5
Paper 2-4 106 20 6.4 10
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14 Data output
Pin allocation of the balance exit plug (front view):
5 1
9 6
Pin 2: Receive data
Pin 3: Transmit data
Pin 5: Signal ground
Interface cables:
Ö Balance printer
3 (TxD) 1 (RxD)
5 (GND) 3 (GND)
7 -8 clench
Ö Balance - PC 9-pole
2 (RxD) 3 (TxD)
3 (TxD) 2 (RxD)
5 (GND) 5 (GND)
4 -6 clench 4 -6 clench
7 -8 clench 7 -8 clench
Ö Balance - PC 25-pole
2 (RxD) 3 (TxD)
3 (TxD) 7 (GND)
5 (GND) 4 – 5 clench
7 -8 clench 6 -20 clench
2 (RxD)
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14.1 Remote commands
Commands function
R CR LF
Reset to factory setting – reset
PC CR LF
Command to call up the values of the balance
S CR LF
Measuring value stable
SI CR LF
Measuring value instable
SU CR LF
Last stable measuring value
SUI CR LF
Current measuring value
Z CR LF
Zeroing stable value
ZI CR LF
Zeroing instable value
T CR LF
Taring stable value
TI CR LF
Taring instable value
C0 CR LF
Cancel continuous data output
C1 CR LF
Start continuous data output
NB CR LF
Serial no. of balance
FS CR LF
Weighing range max.
RV CR LF
Software issue
PD CR LF
Date display
PD CR LF
Time display
PMCR LF
Mode of operation
PS CR LF
Balance parameters are printed out
B CR LF
Keytone
ER CR LF
Call up error message
DH CR LF
Display check status bar
CH CR LF
Delete display check status bar
DF CR LF
Display check capacity display
CF CR LF
Display check capacity display
CL CR LF
Start internal adjustment from outside
KL CR LF
Lock keyboard
KU CR LF
Unlock keyboard
E0 CR LF
Keytone off
E1 CR LF
Keytone on
O0 CR LF
Balance off
O1 CR LF
Balance on
A0 CR LF
Auto zero off
A1 CR LF
Auto zero on
PP n CR LF
No. of the user defined data output
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15 Maintenance, upkeep, disposal
15.1 Cleaning
Please disconnect the device from the operating voltage before cleaning.
To clean, remove the components one after the other (see illustration).
Only use a cloth dampened with mild suds and not aggressive cleaning agents
(solvents or similar). Please ensure that fluids are not able to get into the device and
rub off using a clean, soft cloth.
Loose sample residue/powder can be removed carefully using a brush or hand
vacuum cleaner.
Remove any spilt material to be weighed immediately.
Sample plate
Extraction aid
Plate holder
Wind protection
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Cleaning the temperature sensor:
Also clean as described above. Make sure that the lamp is not touched or damaged.
Cleaning under the moisture analyzer top piece:
The space underneath the moisture analyzer top piece serves the purpose of
insulation. Therefore, deposits should be removed in regular intervals.
Temperatur sensor
Lamp
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15.2 Maintenance, upkeep
The device may only be opened by trained service engineers authorised by KERN.
Disconnect from the mains supply before opening.
15.3 Disposal
The operating company shall dispose of the packaging and the device in compliance
with the valid national or regional law of the operating location.
16 Troubleshooting
The balance should be switched off for a short time following an interruption in the
programme sequence and disconnected from the mains supply. It is then necessary
to repeat the weighing process from the beginning.
Help:
Malfunction Possible cause
Weight display is not
illuminated.
• The balance is not switched on.
• The mains supply connection has been interrupted
(mains cable not plugged in/faulty).
• Power supply interrupted.
The weight display changes
continually
• Draught/air movement
• Table/floor vibrations
• Weighing plate has contact with other objects.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
The weighing result is
obviously wrong or cannot
be reproduced
• The display of the balance is not at zero
• Adjustment is no longer correct.
• Great fluctuations in temperature.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
• The composition of the sample is not homogenous
• The drying time is too short
• The selected drying temperature was too high,
which is apparent from the oxidation process of the
sample. Lower temperature.
• The sample has reached the evaporation point.
Lower temperature.
• The temperature sensor is dirty.
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Fault messages No. Description
Error of control sum 1.1 Error data transfer
Error A/D 1.2 Error A/D converter
A/D Null 2.3 Error A/D converter
A/D Full 2.4 Error A/D converter
Tara/Zero outside the range 2.5 Outside the weighing range
Tara outside the range 2.6 Outside taring range
Result > 10% Max 2.7 Result > 10%
Result > 4% Max 2.8 Load on weighing plate too large
The difference > 1% Max 2.9
Difference cal weight to stored
/momentaneous cal. weight > 1%
The sample mass < 1g 2.10 Sample < 1g
The sample mass outsider
the range
2.11 Sample outside the adjusted area
Outside range 3.1 Value of parameter outside
Faulty value 3.2 Value of parameter outside
Incorrect password 3.4 Wrong password
4.1
Parity error 4.2
Table error 4.3
Suspended transmission CTS 4.4
Suspended
transmissionXOFF
4.5
Error data transfer
Incorrect date 5.1 Wrong date
Overcrossed time 6.1 Timeout
Switch the balance off if other error messages should appear and then switch on
again. If error message persists, inform manufacturer.
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