KERN & SOHN AET 200-4NM User Manual
KERN & Sohn GmbH
Ziegelei 1
E-Mail: info@kern-sohn.com
Tel: +49-[0]7433- 9933-0
Internet: www.kern-sohn.com
Operation manual
Analytical and precision balances
KERN AET,PET,ILT
Version 1.0
01/2014
GB
D-72336 Balingen
Fax: +49-[0]7433-9933-149
AET/PET/ILT-BA-e-1410
KERN AET/PET/ILT
Analytical and precision balances
GB
Version 1.0 01/2014
Operating instructi on
Contents
1. BASIC INFORMATION ....................................................................... 6
1.1. Balances AET-DM ................................................................................... 8
1.2. Balances AET series ................................................................................ 8
1.3. Balances PET series ................................................................................ 9
1.4. Balances ILT-NM series ........................................................................... 9
1.5. Balance cleaning .................................................................................. 10
1.6. Plugging to mains ................................................................................. 10
1.7. Connecting peripheral equipment ........................................................... 10
2. BALANCE DESIGN ........................................................................... 11
2.1. Interfaces ............................................................................................ 13
3. STARTUP ......................................................................................... 14
4. BALANCE KEYBOARD – FUNCTION KEYS ......................................... 15
5. SOFTWARE STRUCTURE .................................................................. 16
6. SOFTWARE WEIGHING WINDOW .................................................... 17
7. LOGGING ........................................................................................ 18
8. MOVING IN USER MENU .................................................................. 20
8.1. Terminal’s keyboard ............................................................................. 20
8.2. Return to weighing mode ...................................................................... 21
9. WEIGHING ...................................................................................... 22
9.1. Selection of mea su ring unit ................................................................... 22
9.2. Means of correct weighing procedure ...................................................... 23
9.3. Balance leveling ................................................................................... 24
9.4. Zeroing ............................................................................................... 24
9.5. Tarring ................................................................................................ 25
9.6. Use of air buoyancy correction factor ...................................................... 25
9.7. Additional parameters on weighing process ............................................. 29
9.8. Minimum sample .................................................................................. 31
10. ADJUSTMENT .................................................................................. 35
10.1. Internal adjustment .............................................................................. 35
10.2. External adjustment ............................................................................. 35
10.3. User adjustment .................................................................................. 36
10.4. Adjustment test ................................................................................... 36
10.5. Automatic adjustment ........................................................................... 37
10.6. Automatic adjustment time ................................................................... 37
10.7. Adjustment report printout .................................................................... 37
10.8. GLP project ......................................................................................... 37
10.9. Adjustment history ............................................................................... 38
2 AET_/PET_/ILT_NM-BA-e-1410
11. USERS ............................................................................................. 39
12. ACCESS LEVEL ................................................................................. 40
13. PROFILES ........................................................................................ 42
13.1. Creating a profile ................................................................................. 42
13.2. Profile structure ................................................................................... 43
13.2.1. Settings ....................................................................................... 44
13.2.2. Working modes ............................................................................. 44
13.2.3. Readout ....................................................................................... 45
13.2.4. Measuring units ............................................................................ 46
14. WORKING MODES – general information ........................................ 47
14.1. Worki n g mode selection ........................................................................ 48
14.2. Quick access keys ................................................................................ 49
14.3. Information ......................................................................................... 50
14.4. Printouts ............................................................................................. 50
14.5. Profiles ............................................................................................... 53
15. PARTS COUNTING ........................................................................... 54
15.1. Additional settings of part counting mode ................................................ 55
15.2. Parts counting – quick access keys ......................................................... 56
15.3. Setting standard (reference) mass by inserting determined part mass ........ 56
15.4. Setting standard (reference) mass by weighing ........................................ 56
15.5. Acquiring part mass from database......................................................... 57
15.6. Updating part mass in the database ........................................................ 58
15.7. Part counting procedure ........................................................................ 58
15.8. Checkweighing function in parts counting mode ....................................... 59
15.9. Dosing function in parts counting mode ................................................... 60
16. CHECKWEIGHING............................................................................ 61
16.1. Use of checkweighing thresh olds ............................................................ 62
16.2. dditional settings of checkweighing mode ................................................ 62
17. DOSING .......................................................................................... 63
17.1. Use of database of products in dosing process ......................................... 64
17.2. Additional settings of dosing mode ......................................................... 65
18. PERCENT SETUP .............................................................................. 66
18.1. Comparison of sample and (reference) mass standard .............................. 67
18.2. Checkweighing, dosing functions in percent setup mode ............................ 68
18.3. Interpreting the function by use of a bargraph ......................................... 69
18.4. Additional settings of Percent Setup mode ............................................... 69
19. DENSITY ......................................................................................... 70
19.1. Determining density of solid object ......................................................... 71
19.2. Density determining of liquids ................................................................ 72
19.3. Density of air ....................................................................................... 73
19.4. Additional settings of Density mode ........................................................ 74
19.5. Printouts ............................................................................................. 75
19.6. Report from completed density determination processes ........................... 78
20. ANIMAL WEIGHING ........................................................................ 79
20.1. Setting of animal weighing mode............................................................ 80
20.2. Additional settings of animal weighing mode ............................................ 81
AET_/PET_/ILT_NM-BA-e-1410 3
21. FORMULATION ................................................................................ 82
21.1. Additional settings of formulation mode .................................................. 83
21.2. Formulation – quick access keys ............................................................ 84
21.3. Adding formulas to the Database of Formulas .......................................... 84
21.4. Using formulas in weighing .................................................................... 86
21.5. Printouts ............................................................................................. 88
21.6. Report from completed formula making processes .................................... 90
22. STATISTICS .................................................................................... 91
22.1. Setting of keys and workspace for Statistics mode ................................... 92
22.2. Additional settings of Statistics mode ...................................................... 92
22.3. Parameters related to a series of measurements ...................................... 93
23. PIPETTE CALIBRATION ................................................................... 95
23.1. Additional settings of pipettes calibration mode ........................................ 97
23.2. Pipettes calibration – quick access keys .................................................. 97
23.3. Adding a pipette to the Database of Pipettes ............................................ 98
23.4. Printouts ............................................................................................. 99
23.5. Working mode activating procedure .......................................................100
23.6. Report from completed calibration processes ..........................................101
24. DIFFERENTIAL WEIGHING ............................................................ 103
24.1. Additional settings of differential weighing mode .....................................104
24.2. Differential weighing – quick access keys ...............................................104
24.3. Introducing a series to the Database of Series ........................................106
24.4. An example of process for differential weighing mode ..............................107
24.5. Copy tare ...........................................................................................113
24.6. Using option “SAMPLE SELECTION”........................................................114
24.7. Deleting a value ..................................................................................114
24.8. Printouts ............................................................................................115
25. STATISTICAL QUALITY CONTROL – SQC ....................................... 117
25.1. Working mode activating procedure .......................................................118
25.2. Additional settings of the SQC mode ......................................................120
25.3. Carrying out a control process ..............................................................120
25.4. Report from product control ..................................................................122
27.1. Processes carried out on databases .......................................................128
27.2. Products .............................................................................................128
27.3. Weighing records ................................................................................130
27.4. Clients ...............................................................................................131
27.5. Formulation ........................................................................................131
27.6. Reports from formulation .....................................................................132
27.7. Reports from density ...........................................................................133
27.8. Pipettes .............................................................................................134
27.9. Reports from pipette calibration processes .............................................134
27.10. Series ............................................................................................135
27.11. A report from SQC...........................................................................136
27.13. Ambient conditions ..........................................................................139
27.14. Packages........................................................................................140
27.15. Warehouses ...................................................................................140
27.16. Printouts ........................................................................................141
4 AET_/PET_/ILT_NM-BA-e-1410
27.17. Universal variables ..........................................................................143
27.18. Delete data older than .....................................................................143
27.19. Export database of weighing records to file ........................................144
28. COMMUNICATION ......................................................................... 145
28.1. RS 232 port settings ............................................................................145
28.2. ETHERNET port settings .......................................................................145
28.3. TCP protocol settings ...........................................................................146
29. PERIPHERAL DEVICES................................................................... 146
29.1. Computer ...........................................................................................146
29.2. Printer ...............................................................................................147
29.3. Barcode scanners ................................................................................148
29.4. Transponder card reader ......................................................................148
29.5. Additiona l display ................................................................................149
30. INPUTS / OUTPUTS ....................................................................... 151
31. OTHERS......................................................................................... 153
31.1. Interface language ..............................................................................153
31.2. Data and time setting ..........................................................................153
31.3. “Beep” sound ......................................................................................153
31.4. Touch panel calibration ........................................................................154
31.5. Level c on t r ol .......................................................................................154
31.6. Sensor sensitivity ................................................................................155
31.7. Autotest .............................................................................................155
32. SYSTEM INFORMATION ................................................................. 161
33. COMMUNICATION PROTOCOL ....................................................... 161
33.1. A set of commands ..............................................................................162
33.2. Responses format for commands sent from computer level ......................163
33.3. Manual printout / Automatic printout .....................................................170
34. CONNECTING PERIPHERAL DEVICES ............................................. 171
35. DIAGRAMS OF CONNECTING CABLES ............................................ 171
36. ERROR MESSAGES ......................................................................... 172
37. APPENDIX A – Variables for printouts........................................... 173
37.1. List of variables ...................................................................................173
37.2. Variables formatting ............................................................................182
38. APPENDIX G – Menu structure ...................................................... 184
39. Declaration of -Conformity ............................................................ 189
AET_/PET_/ILT_NM-BA-e-1410 5
1. BASIC INFORMATION
INTENDED USE
Balances are intended to precise mass measurement of weighed loads
conducted in laboratory conditions.
PRECAUTION MEASURES
Before first use of the balance, it is highly recommended to carefully
read this User Manual, and operate the balance as intended.
Do not operate the touch panel using sharp edged tools (knife,
screwdriver, etc.).
Place weighed loads on the center of balance’s weighing pan.
Load the balance’s weighing pan with loads that gross mass does not
exceed instrument’s measuring range (maximal capacity).
Do not leave heavy loads on balance’s weighing pan for a longer period
of time.
In case of defect immediately unplug the instrument from mains.
Balances to be decommissioned, should be decommissioned in
accordance to valid legal regulations.
Do not use the balance is areas endangered with explosion. Balance Y2
series is not designed to operate in EX zones.
WARRANTY CONDITIONS
A. Defining defects of unclear origin defects and means of their elimination can
only be realized with assistance of manufacturer and user representatives,
B. Warranty does not cover:
• Mechanical defects caused by product exploitation other than intended,
defects of thermal and chemical origin, defects caused by lightning,
overvoltage in the power netw ork or other random event,
• Balance defects if it is utilized contrary to its intended use,
• Balance defects, if service claims removing or destroying product’s
protective stickers which protect the balance’s housing against
unauthorized access.
6 AET_/PET_/ILT_NM-BA-e-1410
• Mechanical defects or defects caused by liquids and natural wear,
• Balance defects caused by inappropriate setting of a defect of electric
power network,
• Defects caused by overloading balance’s mechanical measuring system,
• Maintenance activities (cleaning).
C. Loss of warranty takes place if:
• Service claims intrusion into mechanical or electronic construction by
unauthorized people ,
• Other version of the operating system is installed in a balance,
• The balance does not bear company’s protective stickers.
D. Detailed warranty conditions are listed on a service card.
Supervision over balance’s metrological parameters
Metrological parameters of a balance need to be checked by a user in
determined time intervals. Inspection frequency is conditioned by ambient
conditions in which a balance is used, kind of carried out processes and
adopted quality management system.
The manual’s significance
It is very important to read the user manual carefully before switching on and
starting up balance operation, even if the user is experienced and has worked
with the this type of balance before.
Balance user training
A balance should be utilized and supervised only by users who are trained and
experienced in such type of weighing instruments.
AET_/PET_/ILT_NM-BA-e-1410 7
Analytical balances AET series
back of balance’s housing.
1.1. Balances AET-DM
1.2. Balances AET series
AE-DM analytic balances
A – balance with d=0,01mg unit
B – balance with d=0,1mg unit
After balance installing at operating place,
following should be set:
1 – bottom ring
2 – balance pan
3 – pan shield
After the elements setting, additional
devices should be connected and balance
should be plugged to power source. Power
socket is located on back side of balance
housing.
Pipettes calibration
Remove the pan and put on its place:
- pipettes calibration chamber
- inside the chamber, pan and other
elements should be set up.
Carefully remove the balance from its packaging, remove the plastic and foil
transport protective elements. Gently place the balance in its intended place of
use. Install the weighing pan, and other elements according to below scheme.
A – balance with reading unit
d=0,01mg
B – balance with reading unit
d=0,1mg
On installing the balance in its
intended place of use, assembly:
1 – bottom shield of the weighing
chamber
2 – centering ring
3 – weighing pan
4 – pan shield
On assembling all components,
connect peripheral devices to the
balance, and plug the balance to
mains. Power socket is located at the
8 AET_/PET_/ILT_NM-BA-e-1410
Precision balances PET series
back of balance’s housing.
After unpacking unscrew bolt 1 which locks the
1.3. Balances PET series
Carefully remove the balance from its packaging, remove the plastic and foil
transport protective elements, and gently place the balance in its intended
place of use. Install the weighing pan, and other elements according to below
scheme.
A – balance with reading unit d=1mg
B – balance with reading unit d=10mg
On installing the balance in its
intended place of use, assembly:
1 – weighing pan mandrels
2 – weighing pan
3 – pan shield /in case of d=1mg/
On assembling all components,
connect peripheral devices to the
balance, and plug the balance to
mains. Power socket is located at the
1.4. Balances ILT-NM series
Gently take the balance out of its packaging, remove plastic, carton, foil and
transport protections, and gently place the balance in its intended place of use.
adjustment mechanism.
AET_/PET_/ILT_NM-BA-e-1410 9
Before installing the balance in its intended place
On removing the protections and assembling the
of use, remove transp ort protections (1) an d
assembly the weighing pan (2).
On assembling the components, connect all
peripheral devices to the balance and then plug
the instrument to the mains. Power socket is
located at the back of balance’s housing.
weighing pan, connect the terminal to the socket
located at the back of balance’s housing, and
connect all peripheral devices. Only then plug the
balance to mains (mains socket is located at the
back of balance’s housing).
1.5. Balance cleaning
Clean the balance using a damp cloth by gentle rubbing contaminated places.
Remember to remove the weighing pan and its shields from the weighing
chamber before their cleaning.
CAUTION:
Cleaning balance’s weighing pan if installed may damage instrument’s measuring
mechanism.
1.6. Plugging to mains
The balance should be plugged to mains using the original power adapter,
which is balance’s standard equipment. Plug the power adapter’s plug to
balance’s socket located at the back of the housing.
1.7. Connecting peripheral equipment
Use only accessories and peripheral equipment recommended by the
manufacturer of your balance. The balance must be disconnected from the
mains before connecting or disconnecting any peripherals (printer, PC
computer, computer keyboard). On connecting the peripherals, plug the
balance to mains.
10 AET_/PET_/ILT_NM-BA-e-1410
2. BALANCE DESIGN
Balance AET-NM series
Balance PET series
AET_/PET_/ILT_NM-BA-e-1410 11
Balance ILT-NM series
12 AET_/PET_/ILT_NM-BA-e-1410
3 – USB port
2.1. Interfaces
Description of available interfaces
1 – Ethernet RJ45
2 – RS232 interface (COM1)
4 – IN / OUT, RS232 (COM2)
Interfaces RS232 and IN/OUT
RS232 - socket DB9/M (male), front view:
Pin2 - RxD
Pin3 - TxD
Pin5 - GND
IN/OUT, RS232 socket DSUB15/F (female), front view:
Pin1 - GNDWE
Pin2 - OUT1
Pin3 - OUT2
Pin4 - COMM
Pin5 - 6÷9VDC
Pin6 - IN4
Pin7 - IN3
Pin8 - TxD2
Pin9 - 5VDC
Pin10 - GNDRS
Pin11 - IN2
Pin12 - IN1
Pin13 - RxD2
Pin14 - OUT4
Pin15 - OUT3
AET_/PET_/ILT_NM-BA-e-1410 13
3. STARTUP
• On plugging the balance to mains, instrument’s diode ON/LOAD
located on indicator’s housing is lit up.
• Press powering key located on the upper left section of terminal’s
overlay. Within a few seconds, the OS Windows CE and software start
loading, which is signaled by flickering red diode ON/LOAD.
• On completing the startup procedure, the instrument’s displays main
window of the balance software.
• The balance starts up with no user logged in. In order to start operation,
a user has to log in. (logging procedure is described further in this user
manual).
CAUTION: Remember to start the balance with no load on the weighing pan.
14 AET_/PET_/ILT_NM-BA-e-1410
Key
Description
Sending measurement result to a plugged printer or
computer
4. BALANCE KEYBOARD – FUNCTION KEYS
Switching the instrument ON / OFF
Zeroing
Tarring
Function key (entering instrument’s menu)
Working mode selection, (programmable key)
User profile selection, (programmable key)
Internal adjustment, (programmable key)
AET_/PET_/ILT_NM-BA-e-1410 15
ADJUSTMENT
USERS
PROFILES
DATABASES
COMMUNICATION
PERIPHERALS
INPUTS/OUTPUTS
ACCESS LEVEL
OTHERS
UPDATE
INFORMATION ON
SYSTEM
5. SOFTWARE STRUCTURE
The structure of balance’s main menu is divided into function groups. Each
group comprises parameters grouped by their reference. Description of each
menu group is provided further in this user manual.
List of groups - Parameters
Balance’s main menu is accessed by pressing SETUP function key or soft
key located in the bottom tool bar of balance’s display. The menu comprises
parameters referring to balance settings, functions and profiles.
16 AET_/PET_/ILT_NM-BA-e-1410
6. SOFTWARE WEIGHING WINDOW
The software’s main window is divided into 4 main sections:
• The upper part of the touch panel displays data on active working mode,
logged operator, date, time, active connection to a computer and current
level status of a balance.
• Below there is a weighing window, indicating measurement result and
current measuring unit
• Under which there is a grey coloured workspace containing additional data
on weighing process and activities
Caution:
Data contained in the workspace is optionally configurable.
Configuring process is described in point 14.3 of this user manual;
• Below the workspace there is a set of soft keys:
Caution:
Balance user can declare the presence of function (quick access) keys. Declaring
process is described in point 14.2 of this user manual;
AET_/PET_/ILT_NM-BA-e-1410 17
7. LOGGING
Full access to balance’s parameters and editing databases requires logging to
instrument’s software as an operator with <Administrator> access level. The
logging procedure should be carried out on each switching on the balance.
Log in procedure
• While in main weighing window of the application, press <Log in> text
located in the upper window bar, which opens a window with operators
database including < Admin> entry,
• On entering the < Admin> entry, the software activates on-screen
keyboard for entering operator’s password,
• Insert password “1111” and accept it by pressing key,
• The software automatically returns to displaying the main window, and
the display’s upper bar indicates word <Admin> instead of <Log in>,
• After first logging in, the administrator should add user profiles and set
their corresponding access level (the procedure of assigning access levels
is described further in this user manual, see point 12 and 13).
On future logging in, select a user from the list, and on entering password
balance’s software initiates operation with access level set for a
corresponding user.
Log out procedu re
• While in main weighing window of the application, press name of a logged
operator located in the display’s upper bar. A window with operators
database is opened,
• Press <Log out> soft key (located as position no. 1 in the list of
operations)
• The software returns to the main window, and the display’s upper bar
indicates word <Log in> instead of name of a logged operator.
18 AET_/PET_/ILT_NM-BA-e-1410
Authorization
Access level
None (guest)
No access to editing all of user parameters.
No access to menu <Databases>.
Operator
Access to editing parameters in submenu: <Profiles;
Advanced
Access to editing parameters in submenu: <Profiles;
Administrator
Access to all user parameters, functions and editing
Access level
Software of balances provides four access levels: administrator, advanced
operator, operator and none (anonymous logg ing).
On switching on the balance, its display is constantly active, enabling carrying
out mass measuring processes. These measurements, however, cannot be
saved in balance’s database unless a user with at least minimal access level is
logged in. The minimal access level enables carrying out mass measuring
processes and saving them in balance’s databases using available function
keys.
Below table indicates access to editing user parameters, databases
and software functions depending on active access level.
it is not possible to accept a weighing record nor to start
a process.
Readout> and settings in group of parameters
<Others>, except for <Date and Ti me>. The operator
can start and carry out all weighing processes, and has
access to <Export weighing database to a file> and
preview data in <Databases>. An operator can define
universal variables.
operator
Readout>; <Working modes>; <Communication>;
<Peripherals>; <Others> except for <Date and Time>.
The advanced operator can start and carry out all
weighing processes, and can erase old data from the
<Databases>.
databases.
AET_/PET_/ILT_NM-BA-e-1410 19
Reading printout template from a file format *.lb
device to terminal’s USB port
8. MOVING IN USER MENU
Moving in menu of balances is intuitive.
The touch panel makes the operation of balance’s software very simple.
Pressing a function key, a soft key or area on the display initiates an assigned
function or process.
8.1. Terminal’s keyboard
or
Enter main menu
Scroll menu upwards
Scroll menu downwards,
Fast up and down menu scrolling,
Accept changes,
Leave a function unchanged (without saving changes),
Add items to a database,
Search for items in a database by date
Search for items in a database by name
Search for items in a database by code
Printout of an item from a database
Clear the editing field
Activate / deactivate on-screen keyboard
(function key is active on plugging a data storage
Selection of variables from a list for a printout
Moving (exiting) one level up in menu structure
20 AET_/PET_/ILT_NM-BA-e-1410
8.2. Return to weighing mode
Changes in instrument’s memory are saved permanently on returning to
weighing mode.
Procedure:
- Press key for a few times, until the display indicates to the weighing
mode.
- press soft key in the upper bar on the display. The software
immediately returns to displaying the main window.
AET_/PET_/ILT_NM-BA-e-1410 21
Verified
balance
9. WEIGHING
Load a weighed object on balance’s weighing pan. On stabilization of weighing
result, indicated by stability marker visible on the side of balance’s display,
read the measurement result.
Saving / printout of the measurement result is available on pressing <PRINT>
key:
• In case of verified balances – only stable measurement result can be
saved or printed (stability marker visible on balance’s display)
• In case of non-verified balances – stable or unstable measurement
result can be saved or printed (regardless of stability marker
presence). If unstable measurement result is printed then it is
accompanied by question mark <?> in front of printed mass value.
9.1. Selection of measuring unit
Change of measuring unit is carried out by pressing the measuring unit icon
visible next to the value of measurement result on balance’s display. Pressing
the measuring unit icon opens a list with available units. On selecting one of
them, the software automatically calculates the indicated mass value to the
active measuring unit.
Available measuring units:
Unit denotation
gram [g] yes
milligram [mg] yes *
kilogram [kg] yes *
carat [ct] yes *
pound [lb] no
ounce [oz] no
ounce Troy [ozt] no
pennyweight [dwt] no
Taele Hongkong
Taele Singapur [tls] no
Taele Tajwan [tlt] no
Momme [mom] no
[tlh] no
Grain [gr] no
Newton [N] no
Tical [ti] no
22 AET_/PET_/ILT_NM-BA-e-1410
YES
NO
YES
NO
NO
NO
* - Accessibility of measuring units is conditioned by type of balance and its
verification status.
In non-verified balances all measuring units including those outside the
International System of Units are available.
9.2. Means of correct weighing procedure
In order to ensure long lasting use of a balance, correct and reliable
measurement of weighed loads, follow below procedures:
Start the balance with no load on the weighing pan
(permissible value of load on the weighing pan on balance start is
±10% of its maximal capacity).
Load balance’s weighing pan steadily with no shocks:
Place weighed loads centrally on the weighing pan:
Avoid side loading, in particular side shocks:
AET_/PET_/ILT_NM-BA-e-1410 23
9.3. Balance leveling
Balance leveling procedure
• Press level status pictogram < > located in the upper right corner of the
display.
• The display indicates a control panel of leveling function. Balance operator
previews level status, and balance’s top elevation.
• Level the balance by turning the adjustable feet in a way indicated by
blinking pictograms on the display < > – the level point should move
towards the center of the level circle.
• As the level point is in the center point, its colour changes from red to
green – which is a confirmation for correct level status.
9.4. Zeroing
In order to zero mass indication press key.
The mass indication on the display should equal zero, and precise zero and
stability markers should appear.
Zeroing process is tantamount to determining new zero point recognized by
the balance as precise zero. Zeroing is possible only in stable status of display
indication.
Caution:
Zeroing the display indication is possible only within the ±2% range of
instrument’s maximal capacity. If zeroed value is above the ±2% of the
maximal capacity, then the software indicates an error message Err2.
24 AET_/PET_/ILT_NM-BA-e-1410
9.5. Tarring
In order to determine net weight of a weighed object, place object’s container
(packaging) on balance’s weighing pan, and on stabilization of measurement
result press key. The display should indicate mass equal to zero and
symbols: Net and . On taking off the weighed load and its packaging from
instrument’s weighing pan, the display indicates sum of total tarred mass with
minus sign.
The software also enables assigning tare value to a product from a database.
Then, on product selection from a database, the software automatically
uploads data on tare value for the specific pro duct.
Caution:
Tarring negative values is impossible. On tarring negative values the balance
responds with an error message. In such case zero balance’s indication and repeat
tarring procedure.
Manual tare determination
Procedure:
• While in optional mode press quick access key ,
• Which opens numeric keyboard on balance’s display,
• Using numeric keys insert desired tare mass and press key,
• The balance returns to weighing mode, and the display indicates inserted
tare value with minus “–“ sign.
Deleting tare
The tare value indicated on balance’s display can be deleted by pressing ZERO
key on balance’s front panel, or using programmable function key <Deactivate
tare>
PROCEDURE 1 – on taking the tarred load off balance's weighing pan
• Press ZERO key
• The NET marker is deleted, and new zero point of the balance is determined
PROCEDURE 2 – when the tarred load in on balance’s weighing pan
• Press ZERO key
• The NET marker is deleted, and new zero point of the balance is determined
• If tare value exceeds 2% of balance’s maximal capacity, the display
indicates error message –Err- (forbidden operation)
PROCEDURE 3 - when the tarred load in on balance’s weighing pan or on
taking the tarred load off balance's weighing pan
• Press programmable key <Deactivate tare>
• The NET marker is deleted,
• The display indicates tare value
• Press <Restore tare> key to restore the last tare value
9.6. Use of air buoyancy correction factor
AET_/PET_/ILT_NM-BA-e-1410 25
Sample mass [g]
The application enables correcting mass measurement errors during:
1. Weighing loads that density considerably differs from the density of
standard used to adjusting the balance. Regularly, the balance is adjusted
with a steel mass standard with density ~8.0g/cm3 or a brass mass
standard with density ~8.7g/cm3. If loads made of other substances are
weighed, then ratio indicated on below chart should apply.
Below chart presents the value of mass correction in relation to the density
of weighed load, assuming that air density is constant and equals
1.2 kg/m3.
Correction value [mg]
Density of weighed load
Error value in relation to density of weighed sample
2. Testing the changes of sample mass within a few hours’ time, if: sample
mass is relatively constant (minor changes). In such case it is assumed,
that considerable effect on the measurement result rests on air density
changes, which is affected by changes of pressure, temperature and
humidity.
In order to carry out a reliable measurement, apart from being familiar with
relations applying to ambient conditions, an operator should know the measuring
methods, features of tested sample, air density in the laboratory room and
density of weighed sample.
FUNCTIONING
The application provides two ways to use the air buoyancy correction procedure.
26 AET_/PET_/ILT_NM-BA-e-1410
1. Inserting the specified value of air density and specified value of weighed
sample density to balance’s memory.
On inserting these values the application automatically calculates the
correction factor for weighed mass and indicates corrected value of
weighed mass on balance’s display.
In order to avoid errors, the corrected mass value is accompanied by <!>
symbol visible on balance’s display and a printout.
2. The application semi-automatically determines the value of air density. The
specified density of the weighed sample is inserted to balance’s memory by
an operator.
Determination of air density is carried out using a set of two mass
standards. One of them is made of stainless steel, and the other of
aluminum. Based on mass indications of the two standards, the software
automatically calculated the air density and saves the value in balance’s
memory on operator’s confirmation. Then the density of weighed sample
has to be inserted to balance’s memory.
On inserting these values the application automatically calculates the
correction factor for weighed mass and indicates corrected value of
weighed mass on balance’s display.
As in case 1, the corrected mass value is accompanied by <!> symbol
visible on balance’s display and a printout.
Air buoyancy correction mode is enabled / disabled from the level of user menu.
The application is operating in weighing mode only.
STARTUP AND OPERATION OF AIR BUOYANCY CORRECTION
PROCEDURE
• While in main window press grey coloured workspace
• Select option <Settings>
• Select parameter < Air buoyancy correct ion>
Accessible settings
- Air buoyancy correction – YES/NO
- Sample density (insert the density value of weighed sample). If an
operator uses products from databases, then on product selection
its density value is automatically uploaded.
- Air density – for selecting the means of inserting the air density
value used for calculating buoyancy correction factor.
AET_/PET_/ILT_NM-BA-e-1410 27
Settings:
VALUE – selecting this option opens a window for inserting
determined value of air density (e.g.: determined using other
methods). The inserted value is used to calculating buoyancy
compensation factor. The value is assigned automatically on
carrying out the air density determination (on its completion by
pressing < > key).
ONLINE – selecting this option downloads current air density value
from a connected THB sensor, if such is connected to the balance,
or from internal sensor installed in the balance.
If a balance features both types of sensors (THB module and
internal sensor), then data from the THB module supersedes the
other, and parameters Setup/Ambient Conditions/Ambient
Conditions Module require setting to SAVE or SAVE & ALERTS
mode.
If a balance features only one type of the sensors for temperature,
humidity and pressure recording, then correct ONLINE operati on
requires setting of balance parameters:
− Internal sensors only - Setup/Ambient Conditions/Ambient
Conditions Module set to NONE,
− External THB module only - Setup/Ambient
Conditions/Ambient Conditions Module set to SAVE or
SAVE & ALERTS mode.
Additionally, for correct balance cooperation with the THB mod ule
set port’s transmission parameters to compatible with those of the
THB module. the THB module transmission parameters are detailed
on its data plate.
On returning to the weighing mode, the display indicates an additional symbol
<!>, as indicated on below drawing. From now on the value of indicated mass
is corrected including the air buoyancy compensation factor and sample
density.
The measurement result can only be compensated by a correct value if an
operator inserts to balance’s memory the actual value on the air density and
correct density of weighed sample.
28 AET_/PET_/ILT_NM-BA-e-1410
Caution:
If the <AIR BUOYANCY CORRECTION> mod e is set to <ONLINE> value, then
balance display does not indicate pictogram <!> which means that parameter
Setup/Ambient Conditions/Ambient Conditions Module is set to SAVE
or SAVE & ALERTS mode, and there is no physical connection between a
balance and a THB module, or the parameters for communicating the module
with the balance are set incorrectly. In such case plug a THB module to
balance’s ports COM 1 or COM 2 and set appropriate cooperation parameters,
such as specified on module’s data plate.
9.7. Additional parameters on weighing process
Changes in settings of functions related to weighing process can in some
extend program balance reactions.
Procedure:
1. Press grey coloured workspace
2. Balance display indicates menu: Settings, Keys, Information, Printouts,
Profile
3. Press one of available submenu options and select item for modification,
Menu <Settings> - additional options related to weighing mode
Menu <Keys> - defining quick access keys
Menu <Information> - supplementary data on weighing process displayed in
the grey coloured workspace
Menu <Printouts> - selection of printout type
Menu <Profile> - selection of profile, active during balance operation
Menu <SETTINGS> - contains supplementary data on weighing process, such
as:
− Tare mode
• SINGLE,
mass value stored in balance memory on single pressing of TARE key, the
following pressing of TARE key determines new value of tare. Selection of
product or packaging with assigned tare value causes automatic deleting
of previously assigned tare value;
• SUM OF ACTIVE,
totalizing applied tare values for a product or a packaging (resulting
from selecting a product or a packaging from corresponding database)
with a possibility of increasing determined tare value by manual tare
introduced manually using balance’s numeric keyboard. On following
determining of tare value for a product or a packaging, the tare value
introduced manually is deactivated.
• SUM OF ALL,
totalizing all introduced tare values.
AET_/PET_/ILT_NM-BA-e-1410 29
• AUTOTARE
Means of operation:
Each first stable measurement result is tarred. The NET pictogram
flashes on the display. The operator can determine net mass of weighed
load. On taking off the load from balance’s weighing pan, and as the
indication returns to autozero zone, the software automatically
deactivates Tare value.
− Automatic footer prin tout
Accessible options:
MODE - No – manual footer printout,
Sum of measurements – the condition for printing a footer is
exceeding mass value set in parameter <Threshold>
Number of measurements – the condition for printing a footer
is carrying out a pre-defined number of measurements (a
batch) set in parameter <Threshold>
THRESHOLD – setting the value of threshold determining footer
printout.
For option <Sum of measurements> the value is determined
in measuring unit [g], and for option <Number of
measurements> the value is not measurable, and determined
by number of carried out measurements.
− Printout mode / printout release
• Function key PRINT / printout release, (manual operation)
Never – printout deactivated
First stable – the first stable measurement is printed
Each stable – all stable measurements are set for printing
Each – printout of all measurements (stable and
unstable), in case of a verified balance only stale
measurement results are printable (as in setting
<Each stable>)
• AUTOMATIC MODE
Never – printout de a cti va t e d
First stable – the first stable measurement result obtained after
placing a load on balance’s weighing pan is recorded,
record of the following measurement result takes
place only on unloading the weighing pan, returning
of the mass indication below set threshold’s value,
and placing another load on balance’s weighing pan
Last stable – accepted is the last stable measurement recorded
before taking the load off the weighing pan. The
record takes place on taking the load off the
balance’s weighing pan, and returning of the mass
indication below set threshold’s value.
• THRESHOLD
mass value obligatory for operation of automatic printout. Set in
grams.
30 AET_/PET_/ILT_NM-BA-e-1410
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