KERN AEJ 120-4M Operating instructions

KERN & Sohn GmbH

Ziegelei 1

D-72336 Balingen

E-Mail: [email protected]

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

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

AES/AEJ-BA-e-0912 3

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

4

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 5

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

6

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

AES/AEJ-BA-e-0912 7

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

8

2 Declaration of conformity

KERN & Sohn GmbH

D-72322 Balingen-Frommern

Postfach 4052

E-Mail: [email protected]

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 Konformitäts-

erklärung

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 riferi-

sce è conforme alle norme di seguito citate.

NL Conformiteit-

verklaring

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 9

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

AES/AEJ-BA-e-0912

10

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

AES/AEJ-BA-e-0912 11

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

12

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 mate-

rial 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 measur-

ing 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 dam-

age 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 weigh-

ing 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 bal-

ance and, if applicable, the testing weight, must be checked regularly. The respon-

sible user must define a suitable interval as well as type and scope of this test. In-

formation 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 13

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 appli-

ance 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

14

Major display deviations (incorrect weighing results) may be experienced should

electromagnetic fields (e.g. due to mobile phones or radio equipment), static elec-

tricity 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 15

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

AES/AEJ-BA-e-0912

16

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 sup-

plied 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.

AES/AEJ-BA-e-0912 17

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 bal-

ance 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 maxi-

mum 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

AES/AEJ-BA-e-0912

18

8.4 Net/gross

The dead weight of any weighing container may be tared away by pressing a but-

ton. 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.

AES/AEJ-BA-e-0912 19

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 [*] and [ *].

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 con-

nect 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.

AES/AEJ-BA-e-0912

20

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

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KERN AEJ 120-4M, AEJ 220-4M, AES 120-4, AES 220-4 Operating instructions

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