KERN AES, KERN AEJ, AEJ 120-4M, AEJ 220-4M, AES 120-4 Operation Manual
...
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operation manual
Analytical balances
KERN AES/AEJ
Version 1.2
09/2009
GB
AES/AEJ-BA-e-0912
AES/AEJ-BA-e-0912
2
GB
KERN AES/AEJ
Version 1.2 09/2009
Operating Instructions Analytical Balances
Table of Contents
1 Technical Data.......................................................................................... 5
1.1 Dimensions ........................................................................................................................ 7
1.2 Conversion tables for weighing units ............................................................................. 7
2 Declaration of conformity
........................................................................ 8
3 Appliance overview
.................................................................................. 9
3.1 Keyboard overview.......................................................................................................... 10
3.2 Overview of display......................................................................................................... 11
4 Basic Information (General) .................................................................. 12
4.1 Proper use........................................................................................................................ 12
4.2 Improper Use ................................................................................................................... 12
4.3 Warranty ........................................................................................................................... 12
4.4 Monitoring of Test Resources........................................................................................ 12
5 Basic Safety Precautions ...................................................................... 13
5.1 Pay attention to the instructions in the Operation Manual ......................................... 13
5.2 Personnel training ........................................................................................................... 13
6 Transportation & Storage ...................................................................... 13
6.1 Testing upon acceptance ............................................................................................... 13
6.2 Packaging......................................................................................................................... 13
7 Unpacking, Setup and Commissioning................................................ 13
7.1 Installation Site, Location of Use................................................................................... 13
7.2 Unpacking and erection.................................................................................................. 14
7.3 Connection of peripheral devices.................................................................................. 15
7.4 Initial Commissioning ..................................................................................................... 16
8 Basic Operation
...................................................................................... 16
8.1 Switching on/off............................................................................................................... 16
8.2 Simple weighing .............................................................................................................. 17
8.3 Taring................................................................................................................................ 17
8.4 Net/gross .......................................................................................................................... 18
8.5 Display speed................................................................................................................... 19
8.6 Data output....................................................................................................................... 19
8.7 Underfloor weighing ....................................................................................................... 20
9 Adjustment
............................................................................................. 21
9.1 Adjustment with internal weight (KERN AEJ only)...................................................... 21
9.2 Adjustment with external weight (only AEJ) ................................................................ 22
9.3 Adjustment with external weight (only AES)................................................................ 23
9.4 Adjustment with external weight (only AES)................................................................ 24
9.5 Advice CAL/Auto-CAL (KERN PEJ only)....................................................................... 25
9.6 Standard deviation (KERN PEJ only) ............................................................................ 26
9.7 Verification ....................................................................................................................... 26
9.7.1 Verification switch and seals ............................................................................................. 27
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10 Menu ........................................................................................................ 27
10.1 Menu 1...............................................................................................................................28
10.1.1 Navigation in menu 1 .........................................................................................................28
10.1.2 Overview Menu 1 ...............................................................................................................29
10.1.3 Settings for density determination......................................................................................32
10.1.4 Settings for tolerance weighing / add-up ...........................................................................32
10.1.5 Settings for serial interface ................................................................................................33
10.2 Menu 2...............................................................................................................................34
10.2.1 Navigation in menu 2 .........................................................................................................34
10.2.2 Overview Menu 2 ...............................................................................................................35
11 Operating modes.................................................................................... 36
11.1 Weighing / Weighing unit change ..................................................................................37
11.2 Parts counting ..................................................................................................................37
11.3 Percent determination .....................................................................................................41
11.3.1 Entering the reference weight by weighing........................................................................41
11.3.2 Numeric entering of the reference weight..........................................................................43
11.4 Weighing with freely programmable weighing unit .....................................................44
11.5 Density determination of solids (hydrostatic weighing)..............................................46
11.6 Adding of displayed values.............................................................................................51
11.6.1 Add-up without AUTO-TARE .............................................................................................52
11.6.2 Adding with AUTO-TARA...................................................................................................53
11.7 Weighing with tolerance range.......................................................................................54
11.7.1 General ..............................................................................................................................54
11.7.2 Display of the results..........................................................................................................55
11.7.3 Enable function / settings in menu .....................................................................................57
11.7.4 Tolerance control for absolute values................................................................................58
11.7.5 Tolerance control for differential values.............................................................................63
12 How to set date/time .............................................................................. 67
12.1 Time ...................................................................................................................................67
12.2 Date....................................................................................................................................68
13 Description of individual menu items................................................... 69
13.1 Automatic cut-off of display backlight...........................................................................69
13.2 How to change weighing units .......................................................................................69
13.3 How to change readability (models AES only) .............................................................69
13.4 Save tare value automatically (models AES only)........................................................70
13.5 Instant start.......................................................................................................................70
13.6 Interval output function...................................................................................................70
13.7 How to enter ID number for weighing balance .............................................................72
AES/AEJ-BA-e-0912
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14 Data output ............................................................................................. 73
14.1 RS 232C interface ............................................................................................................ 73
14.2 Printer interface (unidirectional data exchange).......................................................... 76
14.3 Description of interface .................................................................................................. 76
14.4 Data output....................................................................................................................... 77
14.4.1 Format for data transmission............................................................................................. 77
14.4.2 Signs.................................................................................................................................. 77
14.4.3 Numeric data ..................................................................................................................... 77
14.4.4 Units................................................................................................................................... 78
14.4.5 Output weighing data in operating mode........................................................................... 79
14.4.6 Data status......................................................................................................................... 79
14.4.7 Interval data output............................................................................................................ 79
14.4.8 Output time ........................................................................................................................ 80
14.5 Input commands.............................................................................................................. 80
14.5.1 Feedback........................................................................................................................... 80
14.5.2 External tare command ..................................................................................................... 81
14.5.3 Remote control instructions ............................................................................................... 81
15 Printer mode
........................................................................................... 82
15.1 How to issue an adjustment protocol ........................................................................... 82
15.2 ISO/GLP/GMP – compliant output for weighing data .................................................. 83
15.3 Printout examples ........................................................................................................... 84
16 Service, maintenance, disposal ............................................................ 86
16.1 Cleaning............................................................................................................................ 86
16.2 Service, maintenance...................................................................................................... 86
16.3 Disposal............................................................................................................................ 86
17 Error messages, troubleshooting guide .............................................. 87
AES/AEJ-BA-e-0912
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1 Technical Data
KERN AEJ 120-4M AEJ 220-4M
Weighing range (max) 120 g 220 g
Readability (d) 0.1 mg
Minimum load (Min) 10 mg
Verification value (e) 1 mg
Verification class I
Adjustment weight intern
Weighing Units mg, g, ct
Reproducibility 0.1 mg
Linearity ± 0.3mg
Stabilization time (typical) 3 sec
Warm-up time 8 hours
Minimum unit weight at
piece counting
> 0,5 mg
Reference quantities at
piece counting
5, 10, 30, 100
Electric Supply
Line adapter 220V-240V, 50 Hz
Weighing balance 9 V DC, 600mA
Operating temperature + 10° C …. + 30° C
Humidity of air max. 80 % (not condensing)
Underfloor weighing Clevis type eyelet, standard
Case (plastic), W x D x H [mm] 213 x 290 x 314
Dimensions wind screen (plastic), W
x D x H [mm]
178 x 170 x 209 (weighing space)
197 x 185 x 230 (exterior)
Weighing plate (stainless steel)
78 mm (outside)
65 mm (inside)
Weight kg (net) 7 kg
Interface RS 232C
AES/AEJ-BA-e-0912
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KERN AES 120-4 AES 220-4
Weighing range (max) 120 g 220 g
Readability (d) 0.1 mg
Recommended adjustment weight,
not added (class)
100 g (E1) 200 g (E1)
Weighing Units
ct, dwt, g, gn, lb, mg, mo, oz, ozt, tl (Cn),
tl (HK), tl (Singap. Malays), tl (Tw), tol
Reproducibility 0.1 mg
Linearity ± 0.3mg
Stabilization time (typical) 3 sec.
Warm-up time 8 hours
Minimum unit weight at
piece counting
> 0,5 mg
Reference quantities at
piece counting
5, 10, 30, 100
Electric Supply
Line adapter 220V-240V, 50 Hz
Weighing balance 9 V DC, 600mA
Operating temperature + 10° C …. + 30° C
Humidity of air max. 80 % (not condensing)
Underfloor weighing Clevis type eyelet, standard
Case (plastic), W x D x H [mm] 213 x 290 x 314
Dimensions wind screen (plastic), W
x D x H [mm]
178 x 170 x 209 (weighing space)
197 x 185 x 230 (exterior)
Weighing plate (stainless steel)
78 mm (outside)
65 mm (inside)
Weight kg (net) 7 kg
Interface RS 232C
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1.1 Dimensions
1.2 Conversion tables for weighing units
Weighing unit Gram Carat Ounce Pound Troy ounce Penny weight
1g 1 5 0.03527 0.00220 0.03215 0.64301
1ct 0.2 1 0.00705 0.00044 0.00643 0.12860
1oz 28.34952 141.74762 1 0.06250 0.91146 18.22917
1lb 453.59237 2267.96185 16 1 14.58333 291.66667
1ozt 31.10348 155.51738 1.09714 0.06857 1 20
1dwt 1.55517 7.77587 0.05486 0.00343 0.05 1
1GN 0.06480 0.32399 0.00229 0.00014 0.00208 0.04167
1tl (HK) 37.429 187.145 1.32027 0.08252 1.20337 24.06741
1tl (SGP,Mal) 37.79936 188.99682 1.33333 0.08333 1.21528 24.30556
1tl (Taiwan) 37.5 187.5 1.32277 0.08267 1.20565 24.11306
1mom 3.75 18.75 0.13228 0.00827 0.12057 2.41131
1to 11.66380 58.31902 0.41143 0.02571 0.37500 7.5
Weighing unit Grain
Tael
(Hong Kong)
Tael
(Singapore,
Malaysia)
Tael
(Taiwan)
Momme Tola
1g 15.43236 0.02672 0.02646 0.02667 0.26667 0.08574
1ct 3.08647 0.00534 0.00529 0.00533 0.05333 0.01715
1oz 437.5 0.75742 0.75 0.75599 7.55987 2.43056
1lb 7000 12.11874 12 12.09580 120.95797 38.88889
1ozt 480 0.83100 0.82286 0.82943 8.29426 2.66667
1dwt 24 0.04155 0.04114 0.04147 0.41471 0.13333
1GN 1 0.00173 0.00171 0.00173 0.01728 0.00556
1tl (HK) 577.61774 1 0.99020 0.99811 9.98107 3.20899
1tl (SGP,Mal) 583.33333 1.00990 1 1.00798 10.07983 3.24074
1tl (Taiwan) 578.71344 1.00190 0.99208 1 10 3.21507
1mom 57.87134 0.10019 0.09921 0.1 1 0.32151
1to 180 0.31162 0.30857 0.31103 3.11035 1
AES/AEJ-BA-e-0912
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2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: info@kern-sohn.de
Tel: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Declaration of conformity
EC-Konformitätserklärung EC-Declaration of -Conformity
EC-
Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
D
Konformitätserklärung
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
GB
Declaration of
conformity
We hereby declare that the product to which this declaration refers conforms
with the following standards.
CZ
Prohlášení o
shode
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
E
Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F
Déclaration de
conformité
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
I
Dichiarazione di
conformitá
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è conforme alle norme di seguito citate.
NL
Conformiteitverklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P
Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL
Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie
dotyczy, jest zgodny z poniższymi normami.
RUS
Заявление о
соответствии
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
Electronic Balance: KERN AES, AEJ
Mark applied EU Directive Standards
2004/108/EC EN 55022 (2006)
2006/95/EC EN 60950 (2001)
Date: 07.10.2008 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
AES/AEJ-BA-e-0912
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3 Appliance overview
Display
Wind screen
Protection ring
Weighing plate
RS 232 interface
Printer interface
Foot
Foot screw
Underfloor
weighing device
Connection mains adapter
Air bubble
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3.1 Keyboard overview
Function
Key Designation
short key pressing
TARE key
• Taring
• Zeroing
• During numeric input increase of digit
• Change menu settings
ON/OFF
switch
• Turn on/off
CAL-key
• Adjustment
PRINT-key
• Calculate weighing data via interface
• Cancel process/input
S-key
• Save settings/back to weighing mode
• For instructions how to change the speed of the dis-
play, see chpt. 8.5
F-key
• Change to additional operating modes/weighing
unit/net-gross
• During numeric input selection of next digit
• How to invoke a menu, see chpt.10.1.1
• How to select a menu, see chpt.10.1.1
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3.2 Overview of display
Display Description
Tolerance marker
＊
Power display (power supply for balance via line adapter)
Balance in adding mode
}
Stability display
＋
Prompt for reference optimisation
−
Minus
M Display storage value, flashes during storage process
→0← Zeroing display
Bar graph/capacity display
CAL Adjustment symbol
This is displayed during setting of date/time.
Flashes during interval output
Calculate weighing data via interface
B/G Gross weight
Net Tare symbol
＃
Symbol during weighing with freely programmable weighing unit
Σ Symbol during display of “total”
Pcs Symbol during piece counting
(mom) Weighing unit Momme
％
Symbol during percentage calculation
Display weighing unit
mg Milligram
S, X Display depending on function
Display last decimal place (AEJ only)
AES/AEJ-BA-e-0912
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4 Basic Information (General)
4.1 Proper use
The balance you purchased is intended to determine the weighing value of 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. As soon as a stable weighing value is reached the weighing value can be
read.
4.2 Improper Use
Do not use balance for dynamic weighings. 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 permanent load on the weighing plate. This may damage the measuring system.
-Impacts and overloading exceeding the stated maximum load (max) of the balance,
minus a possibly existing tare load, must be strictly avoided. Balance may be damage by this.
Never operate balance in explosive environment. The serial version is not explosion
protected.
The structure of the balance may not be modified. This may lead to incorrect weighing results, safety-related faults and destruction of the balance.
The balance may only be used according to the described conditions. Other areas
of use must be released by KERN in writing.
4.3 Warranty
Warranty claims shall be voided in case
• Our conditions in the operation manual are ignored
• The appliance is used outside the described uses
• The appliance is modified or opened
• Mechanical damage or damage by media, liquids, natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded
4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the balance and, if applicable, the testing weight, must be checked regularly. The responsible user must define a suitable interval as well as type and scope of this test. 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. In
KERN’s accredited DKD calibration laboratory test weights and balances may be
calibrated (return to the national standard) fast and at moderate cost.
AES/AEJ-BA-e-0912
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5 Basic Safety Precautions
5.1 Pay attention to the instructions in the Operation Manual
Carefully read this operation manual before setup and commissioning, even if you
are already familiar with KERN balances.
5.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
6 Transportation & Storage
6.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the appliance itself when unpacking for possible visible damage.
6.2 Packaging
Keep all parts of the original packaging in case you need to return the appliance.
Only use original packaging for returning.
Before sending, disconnect all connected cables and loose/movable parts.
Attach possibly existing transport safeguards. Secure all parts, e.g. weighing plate,
power unit etc., to prevent slipping and damage.
7 Unpacking, Setup and Commissioning
7.1 Installation Site, Location of Use
The balances are designed in a way that reliable weighing results are achieved in
common conditions of use.
You will work accurately and fast, if you select the right location for your balance.
Therefore, observe the following for the installation site:
• 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, vapors and dust;
• Do not expose the device to extreme dampness for longer periods of time.
Non-permitted condensation (condensation of air humidity on the appliance)
may occur if a cold appliance is taken to a considerably warmer environment.
In this case, acclimatize the disconnected appliance for ca. 2 hours at room
temperature.
• Avoid static charge of goods to be weighed or weighing container.
AES/AEJ-BA-e-0912
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Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static electricity accumulations or instable power supply occur. Change location or remove
source of interference.
7.2 Unpacking and erection
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
Ö Scope of delivery / serial accessories
Balance Carrier of weighing plate Weighing plate
Mains adapter Operating Manual
Ö Positioning of weighing plate
Screw down carrier according to drawing and then insert weighing pan.
Weighing plate
Support
AES/AEJ-BA-e-0912
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Ö Levelling balance
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
Ö Mains connection
Power is supplied via the external mains adapter. The stated voltage value must be
the same as the local voltage.
Only use original KERN mains adapters. Using other makes requires consent by
KERN.
7.3 Connection of peripheral devices
Before connecting or disconnecting of additional devices (printer, PC) to the data
interface, always disconnect the balance from the power supply.
With your balance, only use accessories and peripheral devices by KERN, as they
are ideally tuned to your balance.
Air bubble
Foot screw
Connection mains adapter
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7.4 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap. 1).
During this warming up time the balance must be connected to the power supply
(mains, accumulator or battery).
To adapt the balance to ambient conditions, open wind screen doors.
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
8 Basic Operation
8.1 Switching on/off
If the (*) sign can be seen, the balance is being supplied with power via the mains adaptor.
Turn on balance by pressing the ON/OFF key. The
balance will carry out a self-test The balance is ready
for weighing when the weight display appears.
The weighing balance will start in the mode it was in
when last switched off, e. g. piece counting.
Turn off balance by pressing the ON/OFF key.
Symbol (*) appears.
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8.2 Simple weighing
Ö Place goods to be weighed on balance.
Ö Wait until the stability display appears [|].
Ö Read weighing result.
If the display shows the stability display [|] the balance is in a stable status. If the status is instable the
[|] display disappears.
Observe stable environmental conditions.
stable
unstable
Bar graph display
The bar graph display moves from the left to the right
and proceeds equally to the weight loaded onto the
weighing balance. Its full width is reached at maximum load.
This is an analogue display of the current allocation
of the weighing area.
Balance zero display
If the weighing balance does not definitely show
zero, wait for the stability display [|] and then press
the TARE-key. The balance starts with resetting to
zero. Symbol [ a ] appears.
8.3 Taring
Ö Place the weighing box and press the TARE-key.
After successful control of the rest position you
will see displayed zero and the Net symbol. The
weight of the container is now internally saved.
0.0000
g
a
Net
Ö Weigh the material, the net weight will be indi-
cated.
100.0000
g
Net
Ö The weight of the weighing container will be displayed as a minus number after
removing the weighing container.
Ö To delete the tare value, remove load from weighing pan and press the TARE-
key.
Ö The tare procedure can be repeated as many times as necessary, for example
with initial weighing of several components for a mix (add-on weighing). The limit
is reached when the total weighing range capacity is full.
Zero
Highest load
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8.4 Net/gross
The dead weight of any weighing container may be tared away by pressing a button. For subsequent weighings the net weight of the goods to be weighed as well as
the gross weight goods + taring container can be displayed.
Condition: Menu setting [q SET.1],see chpt. 10.1.2
Ö Place the weighing box and press the TARE-key.
After successful control of the rest position you
will see displayed zero and the Net symbol. The
weight of the container is now internally saved.
0.0000
g
a
Net
Ö Weigh the material, the net weight will be indi-
cated.
100.0000
g
Net
Ö Press the F-key to prompt a display of the gross
weight (load + weighing container) and the symbol
B/G.
Ö To switch between net and gross weight, press
the F-key several times.
130.0000
g
B/G
Ú
100.0000
g
Net
• This procedure may be repeated any number of times until the weighing
range of the weighing balance has been exhausted.
• Net/gross function only available in weighing mode.
• Taring is only available as long as net weight is displayed.
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8.5 Display speed
To change the display speed of the weighing balance without invoking the menu,
press the S-key. However, this only will limit your options to the three settings nor-
mal Æ slow Æ fast.
Within the menu it is possible to fine-tune the weighing balance for certain ambient
conditions and measuring purposes, see chpt. 10.1.1, menu items [S.RE.*] and
[6.EnU.*].
Ö Press the S-key, current setting appears.
Ö Repeated pressing of the S-key allows you to se-
lect any of the following settings
normal Æ slow Æ fast
Ö After selecting, wait until the weighing balance
has returned automatically to weighing mode.
FAST
Ú
NORNAL
These settings correspond to the settings in menu item [S.RE.*] and [6.EnU.*].
Corresponding settings
in menu
S-key
Adjustment Description
6.EnU S.RE.
FAST
FAST
Weighing balance sensitive and
fast
0 1
nORNAL
NORMAL
Weighing balance working at
medium speed
0 3
SLQU
SLOW
Weighing balance insensitive and
slow
1 3
8.6 Data output
To print out or transfer weighing and GLP data to a computer you will have to connect a printer or computer. The weighing balance’s factory settings define that data
output happens after successful rest position control was carried out followed by
pressing the PRINT-key. For additional settings see chpt. 10.1.5.
During a display
weighing data are calculated via interface.
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8.7 Underfloor weighing
Objects unsuitable for placing on the weighing scale due to size or shape may be
weighed with the help of the flush-mounted platform.
Proceed as follows:
• Switch off the balance
• Remove the weighing pan and carefully turn over the weighing balance.
• Loosen screw, turn cover plate (1) by 90º and reattach with the help of
the screw.
• Suspend hook for underfloor weighing carefully and completely.
• Place weighing balance over an opening.
• Attach load to hook and carry out weighing procedure.
Fig. 1: Setup of balance for underfloor weighing
CAUTION
▬ Always ensure that all suspended objects are stable enough to
hold the desired goods to be weighed safely (danger of breaking).
▬ Never suspend loads that exceed the stated maximum load (max)
(danger of breaking)
▬ Always ensure that there are no persons, animals or objects that
might be damaged underneath the load.
After completing the underfloor weighing the opening on the bottom of
the balance must always be closed (dust protection).
2
1
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9 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 during the initial start-up, after change
in location and variation of surrounding temperature. To receive accurate measuring
values it is also recommended to adjust the balance periodically in weighing operation.
Observe stable environmental conditions. A warming up time (see chapter 1)
is required for stabilization. Ensure that there are no objects on the weighing
plate.
9.1 Adjustment with internal weight (KERN AEJ only)
With the internal adjustment weight, the weighing accuracy can be checked and readjusted at any time.
Condition: For menu setting [
xCA.1
] see chpt. 10.1.2
Ö Press the CAL key
AWT. CAL
CAL
PWSH C
CAL
Ö Press the CAL-key again and adjustment will take
place automatically.
AWT. CAL
CAL
CH. O
1
CAL
CH. F.S.
1
CAL
Ö The process of adjustment is completed.
Adjustment protocols will be issued automatically
if you connect an optional printer, see chpt. 15
“printer mode”. Whilst printing is in progress [busy
] will be displayed.
EnD
CAL
Ö The balance returns automatically into weighing
mode.
AES/AEJ-BA-e-0912
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9.2 Adjustment with external weight (only AEJ)
During adjustment tests the balance automatically compares the saved value of the
adjustment weight with the actual value. This is only a check, i.e. no values are
changed.
Condition: Menu setting [
xCA.
2
], see chpt. 10.1.2
Ö Press the CAL key
T. nT
CAL
PWSH C
CAL
Ö Press the CAL-key again and the adjustment test
will take place automatically.
T. nT
CAL
T. O
CAL
T. F.S.
CAL
Ö The difference between the saved value and the
measured value is displayed.
Adjustment protocols will be issued automatically
if you connect an optional printer, see chpt. 15
“printer mode”. Whilst printing is in progress
[busy ] will be displayed.
D1FF
CAL
z0007
CAL
g
Ö Press any key; adjustment process will stop. The
balance returns to weighing mode.
AES/AEJ-BA-e-0912
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9.3 Adjustment with external weight (only AES)
Carry out adjustment with the help of the recommended adjustment weight (see
chapter 1 “Technical Specifications”).
Info about adjustment weights can be found on the Internet at: http://www.kernsohn.com
Condition: Menu setting [
xCA.3
], see chpt. 10.1.2
Ö Press the CAL key
EHT.CAL
CAL
1
K
PWSH C
CAL
Ö Press the CAL-key again; zero point will be
saved.
EHT.CAL
CAL
1
K
Qn. O
CAL
Ö When display [on F.S] appears, put the adjusting
weight carefully in the centre of the weighing pan.
CAL
Qn
F.5.
Ö The adjustment process is started
CAL
Qn
F.5.
Ö The process of adjustment is completed.
Adjustment protocols will be issued automatically
if you connect an optional printer, see chpt. 15
“printer mode”. Whilst printing is in progress
[busy ] will be displayed.
BWSX
CAL
EnD
CAL
Ö The balance returns automatically into weighing
mode.
Take away adjustment weight. An adjusting error
or incorrect adjusting weight will be indicated by
the error message [- Err]. Repeat adjustment
procedure.
AES/AEJ-BA-e-0912
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9.4 Adjustment with external weight (only AES)
During adjustment tests the balance automatically compares the saved value of the
adjustment weight with the actual value. This is only a check, i.e. no values are
changed.
Condition: For menu setting [
x CA.
4
] see chpt. 10.1.2
Ö Press the CAL key
T. EHT.
CAL
1
PWSH C
CAL
Ö Operate the CAL-key
T. EHT.
CAL
1
Qn. O
CAL
Ö When display [on F.S] appears, put the adjusting
weight carefully in the centre of the weighing pan.
CAL
Qn
F.5.
Ö Adjustment test is starting
CAL
Qn
F.5.
Ö The difference between the saved value and the
measured value is displayed.
Ö Adjustment protocols will be issued if you connect
an optional printer and by pressing the PRINT-
key, see chpt. 15 “printer mode”. Whilst printing is
in progress [ ] will be displayed.
D1FF
CAL
z0007
CAL
g
Ö Press any key; adjustment process will stop. Re-
move adjusting weight, balance will return into
weighing mode.
EnD
CAL
AES/AEJ-BA-e-0912
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• When the PRINT-key is pressed during the adjusting procedure, [stop] will
be displayed and adjustment interrupted. The balance returns to weighing
mode.
• You can cancel the adjusting procedure by pressing any key.
• The following error messages may be displayed during adjust-
ment/adjustment test.
1-Err
Incorrect adjusting weight
2-Err
Divergence last external adjustment > 1%
3-Err
During the adjustment there was one weight on the weighing plate
4-Err
Divergence from last internal adjustment > 1%
A-Err
Internal adjustment automatics defective
Adjustment protocols can be issued by connecting an optional
printer, see chpt. 15 "printer operation".
[ ] is displayed during printing.
9.5 Advice CAL/Auto-CAL (KERN PEJ only)
Automatic adjustment is started or required every 4 hours, or when a temperature
change of 5 ºC occurs, depending on the setting in the menu, see chpt. 10.1.1.
Advice CAL = menu setting [
E. ADC.
1
]
When “Advice CAL“ is set, the required adjustment will merely be requested and
manual adjustment must be carried out.
“CAL” will start flashing if adjustment is required (after 4 h/ ± 5ºC). “CAL" will keep
flashing until the adjustment is started.
For AEJ models this is carried out with an internal adjustment weight (chpt. 9.1), for
AES models with an external adjustment weight (chpt. 9.3).
Advice CAL = menu setting [
E. ADC. 2
]
Automatic adjustment is carried out when “Auto-CAL“ is set and an adjustment due
(after 4 h / ± 5ºC).
“CAL” will start flashing 10 minutes before the start of automatic adjustment with
internal adjusting weight. Complete current weighing in processes within this time
frame. Automatic adjustment will not be started until the weighing balance is
unloaded and a successful stability display has appeared.
It is only possible to enable the Auto-Cal function in menu setting
[
xCA.1
], see chpt. 10.1.2.
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9.6 Standard deviation (KERN PEJ only)
Ö Keep CAL-key pressed until [
AR
N
] appears.
Ö The weighing balance in conjunction with the adjusting weight defines 10 meas-
ured values Î in succession.
Ö The defined standard deviation (e.g. 0.000073 g) will be displayed.
Ö Press any key; balance will return to weighing mode.
Ö To interrupt measuring, press the PRINT-key.
9.7 Verification
General introduction:
According to EU directive 90/384/EEC balances must be officially verified if they are
used as follows (legally controlled area):
a) For commercial transactions if the price of goods is determined by weighing.
b) For the production of medicines in pharmacies as well as for analyses in the
medical and pharmaceutical laboratory.
c) For official purposes.
d) For manufacturing final packages.
In cases of doubt, please contact your local trade in standard.
Verification instructions
An EU type approval exists for balances described in their technical data as verifiable. If a balance is used where obligation to verify exists as described above, it
must officially verified and re-verified in regular intervals.
Re-verification of a balance is carried out according to the respective national regulations. The validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!
Verification of the balance is invalid without the "seal".
Balances with obligation to verify must be taken out of operation if:
• The weighing result of the balance is outside the error limit. Therefore,
in regular intervals load balance with known test weight (ca. 1/3 of the max.
load) and compare with displayed value.
• The reverification deadline has been exceeded.
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9.7.1 Verification switch and seals
Prior to verification you will have move the calibration switch to verification position
(See direction of arrow, fig. 1). In this position the display shows a bracket around
the last display point.
After verification the balance is sealed at the indicated positions.
Seal of approval Seal of approval
Fig. 1
Move verification switch to
verification position.
Seal/rubber plug/verification switch
Access to the verification switch is achieved
by removing the possibly existing seal (verification becomes invalid) and the rubber
plug.
Position of
verification switch
Status
forwards
Balance is unlocked for the adjustment process, adjustment will be possible "ADJ" appears when the balance is switched on.
backwards Verification position - Adjustment locked
10 Menu
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.
The menu is sub-divided into “menu 1” and “menu 2”.
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