Vetek AS Series User manual

User manual no.
LMI-16-09/05/12/A
PRECISION
BALANCE
AS SERIES
PRECISION
BALANCE
AS/CT SERIES
M A NUF A C T URE R
OF E L E C T R O N I C W E I G H I N G I N S T R U M E N T S
RADWAG 26 – 600 Radom, Bracka 28, POLAND
phone [phone], fax. [phone]
e-mail: [e-mail]
www.radwag.com
Box 79, S-76040 Väddö, Sweden, Tel [phone], [e-mail], www.vetek.com

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MAY 2012

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TABLE OF CONTENTS
1. TECHNICAL DATA ................................................................................ 5
2. BASIC INFORMATION .......................................................................... 7
2.1. Intended use ............................................................................................... 7
2.2. Inappropriate use........................................................................................ 7
2.3. Warranty ..................................................................................................... 7
2.4. Monitoring metrological parameters of the instrument ................................ 8
2.5. Data included in this user manual............................................................... 8
2.6. Staff training ............................................................................................... 8
3. TRANSPORT AND STORAGE .............................................................. 8
3.1. Delivery check ............................................................................................ 8
3.2. Packaging ................................................................................................... 8
4. UNPACKING, ASSEMBLING AND STARTUP ...................................... 9
4.1. Assembling, and place of use ..................................................................... 9
4.2. Unpacking ................................................................................................ 10
4.3. Leveling .................................................................................................... 11
4.4. Standard equipment ................................................................................. 12
4.5. Cleaning ................................................................................................... 12
4.6. Plugging to mains ..................................................................................... 12
4.7. Connecting peripheral devices ................................................................. 12
5. BASIC FUNCTIONS ............................................................................. 12
6. KEYBOARD ......................................................................................... 14
7. START-UP ........................................................................................... 15
8. USER MENU ........................................................................................ 16
8.1. Moving through user menu ....................................................................... 16
8.2. Return to weighing mode .......................................................................... 18
9. WEIGHING ........................................................................................... 20
9.1. Selection of basic measuring unit ............................................................. 21
9.2. Temporary measuring unit ........................................................................ 22
9.3. Setting accessibility of balance working modes ........................................ 23
9.3.1.Selection of working modes available for a user ............................. 23
9.3.2.Means of selecting one of available working modes ....................... 25
10. BALANCE MAIN PARAMETERS ......................................................... 27
10.1. Setting level of filtering ............................................................................. 27
10.2. Value release ........................................................................................... 28
10.3. Autozero function...................................................................................... 29
10.4. Blanking of last digit on the display........................................................... 30
10.5. Weighing mode RAPID ............................................................................. 31
11. OTHER PARAMETERS ....................................................................... 32
11.1. Backlight of weighing result (display backlight) ........................................ 32
11.2. “Beep” sound – reaction on pressing a function key ................................. 33
11.3. Printout of all balance parameters through RS 232 port ........................... 33
12. BALANCE ADJUSTMENT ................................................................... 34
12.1. Internal adjustment ................................................................................... 35
12.2. Settings of menu: Adjustment ................................................................... 37
12.3. Adjustment test ......................................................................................... 40
12.4. Manual adjustment ................................................................................... 41

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12.4.1. Internal adjustment ..................................................................... 41
12.4.2. External adjustment .................................................................... 42
12.5. Adjustment report printout ........................................................................ 43
13. DETERMINING CONTENT OF A PRINTOUT FOR GLP
PROCEDURES .............................................................................. 44
14. BALANCE WORKING MODES ............................................................ 47
14.1. Parts counting of the same mass ............................................................. 48
14.2. Checkweighing (HiLo) with reference to set standard .............................. 53
14.3. Percent setup ........................................................................................... 56
14.3.1. Reference mass determined by weighing ................................... 56
14.3.2. Reference mass set in balance memory by a user ..................... 57
14.4. Working mode FILL .................................................................................. 59
14.5. Density determination of solids and liquids ............................................... 60
14.5.1. Density determination of solids ................................................... 61
14.5.2. Density determination of liquid .................................................... 61
14.6. Pipettes calibration ................................................................................... 62
14.6.1. Data input ................................................................................... 62
14.6.2. First measuring series ................................................................ 63
14.6.3. Second measuring series ........................................................... 64
14.6.4. Third measuring series ............................................................... 65
15. RS 232 FUNCTIONS ........................................................................... 67
15.1. Baud rate .................................................................................................. 67
15.2. Continuous transmission .......................................................................... 68
15.2.1. Continuous transmission in basic measuring unit ....................... 68
15.2.2. Continuous transmission in current measuring unit .................... 69
15.3. Setting operation mode for RS 232 interface ............................................ 70
15.4. Determination of data type sent via RS 232 output .................................. 71
15.5. Minimum mass required for activating automatic printout ......................... 72
16. COOPERATION WITH A PRINTER OR A COMPUTER ..................... 73
16.1. Cross-section through connecting conductors .......................................... 74
16.2. Printing date with specified date and time ................................................ 75
16.3. Cooperation with statistic printer KAFKA SQS ......................................... 75
16.4. Format of data sending ............................................................................. 75
16.4.1. Format of data sent on pressing of PRINT key ........................... 76
16.4.2. Format of data sending as response to commands generated
from a computer ....................................................................................... 76
17. UNDER HOOK WEIGHING ................................................................. 78
18. LIST OF COMMANDS: COMPUTER – BALANCE .............................. 79
19. ERROR MESSAGES ........................................................................... 80
20. ADDITIONAL EQUIPMENT ................................................................. 81
20.1. Anti-vibration table .................................................................................... 81
20.2. Rack for under hook weighing .................................................................. 81
20.3. Density determination kit (for solids and liquids) ...................................... 81
20.4. Additional display...................................................................................... 81
20.5. Computer software ................................................................................... 82

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1. TECHNICAL DATA
AS
60/C/2
AS
60/220/C/2
AS
110/C/2
AS
160/C/2
AS
220/C/2
AS
310/C/2*
Max capacity
60g
60/220g
110g
160g
220g
310g
Minimum
weight
1mg
1mg
10 mg
10 mg
10 mg
10 mg
Readability
0,01mg
0,01/0,1mg
0,1 mg
0,1mg
0,1mg
0,1mg
Tare range
-60g
-220g
-110 g
-160 g
-220 g
-310 g
Repeatability
0,04mg
0,04/0,1mg
0,1 mg
0,1 mg
0,1 mg
0,1 mg
Linearity
±0,07mg
±0,07/0,2mg
±0,2mg
±0,3mg
Pan size
Φ 70 mm
Φ 85 mm
Sensitivity drift
1 ppm/°C in temperature +15 ° - +35 °C
Working
temperature
+10 ° - +40 °C
Power supply
13,5 - 16V DC / 1,1 A
Adjustment
internal (automatic)
Display
LCD with backlight
* - non-verified balance
APS 120/C/2/CT APS 220/C/2/CT APS 320/C/2/CT
Max capacity
120g/600ct 220g/1100ct 320g/1600ct
Minimum
weight
0,02g/0,1ct 0,02g/0,1ct 0,02g/0,1ct
Readability
0,0002/0,001ct 0,0002g/0,001ct 0,0002g/0,001ct
Tare range
-120g/-600ct -220g/-1100ct -320g/-1600ct
Repeatability
0,0002g/0,001ct 0,0004g/0,002ct
Linearity
±0,0002g/0,001ct ±0,0004g/0,002ct
Pan size
Φ 85 mm
Sensitivity drift
2 ppm/°C in temperature +15 ° - +35 °C
Working
temperature
+10 ° - +40 °C
Power supply
13,5 - 16V DC / 1,1 A
Adjustment
internal
Display
LCD with backlight

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Dimensions
Balance series:
AS 60/C/2
AS 60/220/C/2
AS 110/C/2
AS 160/C/2
AS 220/C/2
AS 310/C/2
Balance series:
APS 120/C/2/CT
APS 220/C/2/CT
APS 320/C/2/CT

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2. BASIC INFORMATION
2.1. Intended use
Analytical balance AS series serves to determine the weighing value of loads in
laboratory environment. It is intended for application as a non-automatic
weighing instrument only, i.e. the material to be weighed is manually and
carefully placed in the center of the weighing pan. Weighing result should be
read only after stable reading has been obtained.
2.2. Inappropriate use
Do not use the balance as a dynamic weighing instrument. Even if small
quantities of weighed material are added or removed from the weighing pan of
the instrument, the reading should be taken only after stabilization of the
measurement result. Do not place any magnetic materials on the weighing pan,
as this can cause damage of the measuring system of the instrument. Be sure
to avoid impact shock and overloading the balance in excess of the prescribed
maximum measuring range (max capacity), minus any possible tare weight that
has been applied. Never use the balance in an environment endangered by an
explosion. This balance has not been adjusted for operation in explosive areas.
There must not be any modification made to the balance.
2.3. Warranty
Warranty is not valid at the following:
• Non-observation of the guidelines of this user manual,
• Use of balance other than specified in this manual,
• Alternation to or opening of the device,
• Mechanical damage and damage caused by media, natural water,
and tear,
• Inappropriate assembling or defects of electric installation,
• Overloading of the measuring instrument.

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2.4. Monitoring metrological parameters of the instrument
Metrological characteristics of the balance requires periodical inspection
carried out by its operator. Inspection frequency is conditioned by ambient
conditions in which the balance is used, types of performed processes and
accepted quality management system in an organization.
2.5. Data included in this user manual
Please read the user manual carefully before assembling and startup, even if
the user is experienced with this type of weighing instruments.
2.6. Staff training
This balance should only be operated and maintained by personnel who is
trained and experienced in using this type of balances.
3. TRANSPORT AND STORAGE
3.1. Delivery check
Please check the packaging immediately upon delivery and the device during
unpacking for any visible signs of external damage.
3.2. Packaging
Please retain all parts of the original packaging should the balance be
transported in the future. Only the original packaging should be used for
dispatching the balance. Before packing, disconnect all attached cables and
remove any loose/movable parts (weighing pan, anti-draft shields, etc.). Please
place balance and its components in their original packaging, and protect them
against damage during transport.

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4. UNPACKING, ASSEMBLING AND STARTUP
4.1. Assembling, and place of use
• Balance should be stored and used in locations free of vibrations and
shakes, free of air movement and dust,
• Ambient air temperature should not exceed the range of: +10oC ÷ +40oC
• Ambient relative humidity should not exceed 80%
• During balance operation, ambient temperature in the weighing room should
not change more than 0,5°C within one hour,
• The balance should be located on a stable wall console desk or a stable
working table which is not affected by vibrations and distant from heat
sources,
• Take special safety measures when weighing magnetic objects, as part of
the balance is a strong magnet. Should such loads be weighed, use under
hook weighing option, which removes the weighed load from area influenced
by the balance’s magnet. For assembling the hook for under hook weighing
option see the bottom section of balance’s housing,
• In order to avoid influence of static electricity on the measurement process,
ground the balance’s housing. the grounding bolt is located at the back of
balance’s housing.

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4.2. Unpacking
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. Assemble the weighing pan, and other elements according to below
scheme:
Balance with weighing pan Φ 70 mm:
- open side doors of the weighing
chamber,
- inside the weighing chamber place lower
shield of the weighing chamber (1),
- put centering ring (2) [framing facing
downwards] onto the weighing
chamber’s shield,
- in the center of centering ring assembly
the weighing pan (3),
- assembly anti-draft shield (4) on the
centering ring and weighing chamber’s
shield,
- close side doors of the weighing
chamber,
- plug the balance to mains,
pin of power adaptor should be
connected to socket in the back of
balance housing.

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Balance with weighing pan Φ 85 mm:
- open side doors of the weighing
chamber,
- inside the weighing chamber place
lower shield of the weighing chamber
(1),
- put centering ring (2) [framing facing
downwards] onto the weighing
chamber’s shield,
- in the center of centering ring
assembly the weighing pan (3),
- assembly anti-draft shield (4) inside
the weighing chamber,
- close side doors of the weighing
chamber,
- pin of power adaptor should be
connected to socket in the back of
balance housing.
4.3. Leveling
Before plugging to mains, level the device using two adjusting
feet located at the back of balance’s housing. Turn the
adjusting feet in a way that the air bubble of the level is placed
centrally. The level is located at the back wall of balance’s
housing.

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4.4. Standard equipment
• Balance.
• Weighing pan and protecting (anti-draft) components.
• Power adapter.
• User manual.
4.5. Cleaning
Balance should be cleaned with damp cloth by gentle wiping the smudges of
dirt. In order to clean the weighing pan of the balance, please remove it from
the weighing chamber. Cleaning of the pan when assembled may cause
damage of the measuring system of the balance.
4.6. Plugging to mains
Balance can be plugged to mains only with a power adapter that comes
standard with the balance. Nominal power supply of the power adapter
(specified on the data plate of the power adapter) should be compatible to the
power from mains. Plug the balance to mains – the plugging socket is located
at the back of balance’s housing. Balance display will light and show name and
number of software, after which balance will display 0.0000g. If indication is
other than zero, please press ESC/TARE key.
4.7. Connecting peripheral devices
The balance must be unplugged from the mains before connecting or
disconnecting any peripheral devices (printer, PC computer). Use only
peripheral devices recommended by the manufacturer with your balance.
These have been ideally coordinated to your balance. On connecting a
peripheral device, plug the balance to mains.
5. BASIC FUNCTIONS
• functions related to measuring units
- setting default measuring unit <StUn>,
- weighing in grams [g],
- weighing in milligrams [mg],
- weighing in carats [ct],
- weighing in units from beyond SI (available only in non-verified
balances): [oz], [ozt], [dwt], [t], [mom], [gn],

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• functions related to working modes
- parts counting <PcS>,
- checkweighing (+/- control) <HiLo>,
- percent setup <PrcA>, <PrcB>,
- density determination of liquid <d_Li>,
- density determination of solids <d_Co>,
- pipettes calibration <PiPEt>
- FiLL mode <FiLL>
• functions related to setting a balance to ambient and working conditions
at a workstation
- enabling / disabling autozero system <Auto>,
- setting the parameter of measurement result averaging <AuE>,
- measurement result value release <ConF>,
- weighing mode <rAPd>,
- display backlight <bl>,
- beep signal (balance reacion on pressing a function key) <bEEP>,
• functions related to use of RS 232 interface
- setting baud rate <bAud>,
- Continuous data transmission in basic measuring unit <CntA>,
- Continuous data transmission in current measuring unit <Cntb>,
- Automatic operation mode <rEPL>.
Balance As series can be used to weigh loads under the weighing platform – i.e.
under hook weighing option.
Balance software enables printing a report from adjustment process and carrying
out adjustment test.

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6. KEYBOARD
ON/OFF key; enables turn
ing on and off balance’s display. If turned
off, balance components other than the display are powered, and
balance is in stand-by mode.
F key; function key.
MODE key; for selecting working mode.
UNITS key; changes measuring units.
PRINT/ENTER
key; sends current display status to a peripheral
device (PRINT) or accepts selected value of a parameter or function
(ENTER).
ESC/TARA key; zeroing display indication.

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7. START-UP
When plugged to mains, the balance displays name and number of software, and afterwards
proceeds to weighing mode.
Balance temperature stabilization period.
Before start of measuring processes, it is necessary to wait until the balance is
thermally stabilized. It is a period of so called balance self-heating. In case of
balances AS and APS series self-heating period takes approximately 30 minutes.
The specified time interval refers to balances that have been stored in room
temperature before plugging to mains.
For balances that were stored in much lower temperatures before plugging to mains
(e.g. during winter period) thermal stabilization should last approximately 4 hours.
Correct operation of a balance is possible within temperature range specified in the
technical parameters, see point 1. If the balance is placed in area which ambient
temperature is out of temperature range specified in the technical data, then
balance’s display may signal such situation by lighting an appropriate marker (a
black triangle).
In case the balance displays the marker, increase or decrease ambient
temperature, depending on present temperature value. It is recommended that
ambient temperature changes at balance’s place of use are very small (slow).

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8. USER MENU
Balance menu is divided into 7 basic function groups. Each group has individual
name starting with capital letter P.
8.1. Moving through user menu
An operator moves through balance menu using keys on overlay’s keyboard:
Entering main menu. F function key.
Selecting group of parameters one by one downwards or
changing parameter value by one value downwards. MODE key.
Selecting group of parameters one by one upwards or changing
parameter value by one value upwards. UNITS key.
Selecting group of parameters for activating. On pressing the
key, the display indicates the first parameter in a selected group.
F key.
Exit to previous menu level, e.g. to the main menu. ON/OFF key.
Abandon parameter changes. Esc/TARE key.
Accept / confirm introduced changes. PRINT/ENTER key.
Name of function groups and their content:
P1 CAL [Adjustment/Calibration]
P1.1 iCAL | [internal adjustment]
P1.2 ECAL | [external adjustment]
P1.3 tCAL | [temperature adjustment]
P1.4 ACAL | both/nonE/tenno/tinnE [automatic adjustment]
P1.5 CALt | 1 h ÷ 12h [time of automatic adjustment]
P1.6 CALr | YES/no [report from adjustment]

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P2 GLP [Good Laboratory Practice]
P2.1 USr | _ [name of user]
P2.2 PrJ | _ [name of project]
P2.3 Ptin | YES/no [printout of measurement time]
P2.4 PdAt | YES/no [printout of measurement date]
P2.5 PUSr | YES/no [printout of user name]
P2.6 PPrJ | YES/no [printout of project name]
P2.7 PId | YES/no [printout of balance’s factory number]
P2.8 PFr | YES/no [printout of frames]
P3 rEAd [Main user parameters]
P3.1 AuE | Stand/Slouu/FASt [filtering level]
P3.2 ConF | FASt_rEL/Fast/rEL [value release]
P3.3 Auto | On/OFF [autozero]
P3.4 Ldi9 | ALuuAYS/neper/uu_StAb [blanking last digit]
P3.5 rAPd I YES/no [weighing mode RAPID]
P4 Print [Data transmission – RS 232]
P4.1 bAud | 2400/4800/9600/19200 [baud rate]
P4.2 CntA | YES/no [continuous printout in basic measuring unit]
P4.3 Cntb | YES/no [continuous printout in current measuring unit]
P4.4 rEPL | YES/no [manual or automatic operation]
P4.5 PStb | YES/no [measurement result printout: stable or unstable]
P4.6 Lo | 000.0000 [min mass threshold for automatic operation]
P5 Unit [Measuring units]
P5.1 StUn | g/mg/ct/oz/ozt/dwt/t/mom/G [basic measuring units – e,g, gram]
P5.2 mg | YES/no [mg - millligram]
P5.3 Ct | YES/no [ct – carat]
P5.4 oZ | YES/no [oz – ounce]
P5.5 oZt | YES/no [ozt – ounce troy]
P5.6 dwt | YES/no [dwt – pennyweight]
P5.7 t | YES/no [t – tael]
P5.8 nno | YES/no [mom - momme]
P5.9 Gr | YES/no [gr – grain]
P6 Func [Funkcje]
P6.1 FFun | ALL/PcS/HiLo/PrcA/Prcb/d_Co/d_Li/PipEttE/FiLL
working mode selection]
P6.2 PcS | YES/no [parts counting]

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P6.3 HiLo | YES/no [checkweighing]
P6.4 PrcA | YES/no [percent setup with reference to
weighed standard]
P6.5 Prcb | YES/no [percent setup with reference to
declared standard]
P6.6 d_Co | YES/no [density determination of solids]
P6.7 d_Li | YES/no [density determination of liquids]
P6.8 Pi_t I YES/no [pipettes calibration]
P6.9 Fill I YES/no [working mode FiLL]
P7 othEr [Other functions]
P7.1 bL | On/Aut/OFF [display backlight]
P7.2 bEEP | On/OFF [beep sound on pressing keys]
P7.3 PrnS | [printout of balance parameters]
8.2. Return to weighing mode
CAUTION
Changes introduced in balance memory will be permanently saved
on return weighing with procedure of saving changes.
Press ESC/TARE key for several times, until the display
indicates command SAvE?.
Then select one of below option:
 PRINT/ENTER key – save (accept) changes
 or ESC/TARE key – abandon introduced changes, and
leave to balance menu.
After pressing an appropriate key, the balance goes back to
weighing mode.

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9. WEIGHING
Before start of weighing process or in case of essential change of ambient
conditions at a workstation (e.g. ambient temperature change at a workstation more
than 0,8°C) the balance requires adjusting. The procedure of balance adjustment is
described further in this user manual.
• Before start of weighing procedure, it is recommended to load the balance’s
weighing pan a few times with mass close to balance max capacity,
• Check if unloaded balance indicates “precise zero” - and whether
measurement is stable - , if not press ESC/TARE key,
• Press UNITS key to set a measuring unit:
[g], [mg], [ct], and also if enabled in factory menu [oz], [ozt], [dwt], [t], [mom],
[gn],
• place weighed object on balance’s weighing pan and read result only on
stabilization of measurement result,
• mass indication of a load placed on balance’s weighing pan can be tarred for
multiple times by pressing ESC/TARA key (pay attention not to exceed
maximal capacity of a balance by applying multiple tare function).
During times between carrying out the following measurement series do not unplug
the balance from mains. It is recommended to switch off balance’s display by
pressing ON/OFF key. On repeated pressing of the ON/OFF key the balance is
ready for operation and carrying out the following measurements.
In order to adjust the balance’s operation (while weighing small mass
≤0,6g) to ambient conditions at a workstation, it is recommended to set
the following:
- filtering level AuE to: the slowest
- value release ConF to: reliable