Kern EW 220-3NM, EW 420-3NM, EW 620-3NM User guide

KERN & Sohn GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

Operating instruction
Precision balances

KERN EW/EG-N/EWB

Version 2.5

10/2011
GB

EW/EG-N/EWB-BA-e-1125

2

GB

KERN EW/EG-N/EWB

Version 2.5 10/2011

Operating instruction
Precision balances

Table of contents

1 Technical data ............................................................................................ 4

1.1 Read-off of the various weighing units ........................................................................... 10

1.2 Weighing unit conversion charts ..................................................................................... 11

2 Fundamental information (general) ........................................................ 12

2.1 Intended use ....................................................................................................................... 12

2.2 Inappropriate use ............................................................................................................... 12

2.3 Guarantee ............................................................................................................................ 12

2.4 Monitoring the test substances ........................................................................................ 13

3 Fundamental safety information ............................................................. 13

3.1 Observe the information in the operating instructions .................................................. 13

3.2 Staff training ....................................................................................................................... 13

4 Transport and storage ............................................................................. 13

4.1 Acceptance check .............................................................................................................. 13

4.2 Packaging / return transport ............................................................................................. 13

5 Unpacking, installation and commissioning ......................................... 14

5.1 Place of installation, place of use ..................................................................................... 14

5.2 Unpacking ........................................................................................................................... 15

5.2.1 Installation ............................................................................................................................ 15

5.2.2 List of items supplied ............................................................................................................ 15

5.2.3 Positioning the weighing plate .............................................................................................. 16

5.2.4 Serial draft shield installation ................................................................................................ 16

5.2.5 Draft shield installation – optional ......................................................................................... 17

5.2.6 Draft shield with glass sliding doors (only model KERN EW 120-4NM standard)............... 17

5.3 Mains supply....................................................................................................................... 18

5.4 Operation using a rechargeable battery (optional) ......................................................... 18

5.5 Connecting peripheral equipment .................................................................................... 19

5.6 Initial start-up...................................................................................................................... 19

5.6.1 Power display ....................................................................................................................... 19

5.6.2 Bar graph display.................................................................................................................. 19

5.6.3 Stability indication ................................................................................................................. 20

5.6.4 Zero display on the balance ................................................................................................. 20

5.7 Adjustment .......................................................................................................................... 21

5.8 Adjusting ............................................................................................................................. 21

5.8.1 Adjusting with externall weight (only KERN EW-B, EW-N) .................................................. 21

5.8.2 Adjusting with internal weight (only KERN EG) .................................................................... 21

5.8.3 Adjusting with external weight (only KERN EW and EWB) .................................................. 23

5.9 Verification .......................................................................................................................... 25

5.10 Verification switch and official seal ................................................................................. 26

EW/EG-N/EWB-e-1125

3

6 Operation .................................................................................................. 27

6.1 Operating elements ............................................................................................................ 27

6.1.1 Overview of the keypad ........................................................................................................ 28

6.1.2 Overview of display .............................................................................................................. 29

6.2 Operation ............................................................................................................................ 30

6.2.1 Weighing .............................................................................................................................. 30

6.2.1.1 Underfloor weighing ........................................................................................................................... 31

6.2.1.2 Tare weighing (tare) .......................................................................................................................... 32

6.2.2 Piece counting (excl. model KERN EW120-4NM) ............................................................... 34

6.2.2.1 Add mode ........................................................................................................................................... 36

6.2.3 Percent weighing (excl. model KERN EW120-4NM) ........................................................... 38

6.2.4 Weighing using a tolerance range (excl. model KERN EW120-4NM) ................................ 39

6.2.4.1 Basic settings when weighing using a tolerance range ...................................................................... 40

6.2.4.2 Entering the limit values by weighing ................................................................................................. 42

6.2.4.3 Entering the limit values using the keyboard ...................................................................................... 44

7 Functions .................................................................................................. 46

7.1 Access and changing of numerous functions: ............................................................... 46

7.2 List of the function parameters ........................................................................................ 47

7.2.1 Parameters when weighing with a tolerance range (excl. model KERN EW120-4NM) ...... 49

7.2.2 Parameters for the serial interface ....................................................................................... 50

8 Data output ............................................................................................... 51

8.1 Description of the serial data output (RS 232C).............................................................. 51

8.2 Technical data of the interface ......................................................................................... 51

8.3 Interface description .......................................................................................................... 52

8.4 Data Output ......................................................................................................................... 52

8.4.1 Data Transmission Formats ................................................................................................. 52

8.4.2 Algebraic sign ....................................................................................................................... 52

8.4.3 Data ...................................................................................................................................... 52

8.4.4 Units ..................................................................................................................................... 53

8.4.5 Result of the evaluation / Type of data ................................................................................. 53

8.4.6 Data state ............................................................................................................................. 53

8.5 Data input commands ........................................................................................................ 54

8.5.1 Command input format......................................................................................................... 54

8.5.2 External taring command ..................................................................................................... 54

8.5.3 External control commands .................................................................................................. 54

8.6 Feedback message after data transmission .................................................................... 55

9 Maintenance, upkeep, disposal .............................................................. 55

9.1 Cleaning .............................................................................................................................. 55

9.2 Maintenance, upkeep ......................................................................................................... 55

9.3 Disposal .............................................................................................................................. 55

10 Troubleshooting ....................................................................................... 56

EW/EG-N/EWB-e-1125

4

KERN

EG 220-3NM

EG 420-3NM

EG 620-3NM

Readout

0,001 g

0,001 g

0,001 g

Verification value (e)

0,01 g

0,01 g

0,01 g

Weighing range (max.)

220 g

420 g

620 g

Class of accuracy

II

II

I

Taring range (subtractive)

220g

420 g

620 g

Minimum load (Min)

0,02 g

0,02 g

0,1 g

Minimum weight for count­ing parts

0,001 g

0,001 g

0,001 g

Reference quantity

10, 30, 50, 100

10, 30, 50, 100

10, 30, 50, 100

Reproducibility

0,001 g

0,001 g

0,001 g

Linearity

± 0,002 g

± 0,003 g

± 0,004 g

Adjusting weight

internal

internal

internal

Stabilization time

3 sec.

3 sec.

3 sec.

Weighing plate stainless
steel

Ø 118 mm

Ø 118 mm

Ø 118 mm

Weight kg (net)

2,0

2,0

2,0

Units,
verification switch in verifi­cation position,(chap. 5.10)

g, ct

Units ,
verification switch not in
verification position,
(chap. 5.10)

g, ct, oz, lb, ozt, dwt, GN, tl (HongKong), tl (Taiwan),

tl (Singapore, Malaysia), momme, tola

Air humidity

max. 80 % relative (not condensing)

Permissible ambient
condition

10° C to 30° C

Balance dimensions

235 x 180 x 75 mm (excluding draft shield)

235 x 185 x 165 mm (including draft shield)

Vibratory filter

4

Mains supply

Mains adaptor 230 V, 50/60 Hz ;

9 V DC balance, 200 mA

Interface

RS 232 C interfaced

Rechargeable battery

optional

Underfloor weighing

Hanging loop optional

1 Technical data

EW/EG-N/EWB-e-1125

5

KERN

EG 2200-2NM

EG 4200-2NM

EW 120-4NM

Readout

0,01 g

0,01 g

0,0002 g

Verification value (e)

0,1 g

0,1 g

0,001 g

Weighing range (max.)

2200 g

4200 g

120 g

Class of accuracy

II

II

I

Taring range (subtractive)

2200 g

4200 g

120g

Minimum load (Min)

0,5 g

0,5 g

0,02 g

Minimum weight for counting
parts

0,01 g

0,01 g

-

Reference quantity

10, 30, 50, 100

10, 30, 50, 100

-

Reproducibility

0,01 g

0,01 g

0,0002 g

Linearity

± 0, 02 g

± 0,02 g

± 0,0008 g

Adjusting weight

internal

internal

-

Test weight, included

-

-

50 g (F1)

Recommended adjusting
weight, not included (class)

-

-

100g (E2)

Stabilization time

3 sec.

3 sec.

3 sec.

Weighing plate stainless steel

180 x 160 mm

180 x 160 mm

Ø 80 mm

Weight kg (net)

3,7

3,7

2,4

Units,
verification switch in verification
position,(chap. 5.10)

g, ct

Units ,
verification switch not in verifica­tion position,
(chap. 5.10)

g, ct, oz, lb, ozt, dwt, GN, tl (HongKong), tl (Taiwan),

tl (Singapore, Malaysia), momme, tola

Air humidity

max. 80 % relative (not condensing)

Permissible ambient condition

10° C to 30° C

Balance dimensions
including draft shield

195 x 251 x 254

mm

Balance dimensions
excluding draft shield

190 x 265 x 90 mm

180 x 235 x 75

mm

Vibratory filter

4

Mains supply

Mains adapter 230 V, 50/60 Hz ; 9 V DC balance,

200 mA

Interface

RS 232 C interfaced

Rechargeable battery

optional

Underfloor weighing

Hanging loop optional

EW/EG-N/EWB-e-1125

6

KERN

EW 220-3NM

EW 420-3NM

EW 620-3NM

Readout

0,001 g

0,001 g

0,001 g

Verification value (e)

0,01 g

0,01 g

0,01 g

Weighing range (max.)

220 g

420 g

620 g

Class of accuracy

II

II

I

Taring range (subtractive)

220g

420 g

620 g

Minimum load (Min)

0,02 g

0,02 g

0,1 g

Minimum weight for count­ing parts

0,001 g

0,001 g

0,001 g

Reference quantity

10, 30, 50, 100

10, 30, 50, 100

10, 30, 50, 100

Reproducibility

0,001 g

0,001 g

0,001 g

Linearity

± 0,002 g

± 0,003 g

± 0,004 g

Recommended adjusting
weight, not included (class)

200g (F1)

2 x 200g (E2)

500 g (E2)

Stabilization time

2 sec.

2 sec.

2 sec.

Weighing plate stainless
steel

Ø 118 mm

Ø 118 mm

Ø 118 mm

Weight kg (net)

1,3

1,3

1,3

Units,
verification switch in verifi­cation position,(chap. 5.10)

g, ct

Units ,
verification switch not in
verification position,
(chap. 5.10)

g, ct, oz, lb, ozt, dwt, GN, tl (HongKong), tl (Taiwan),

tl (Singapore, Malaysia), momme, tola

Air humidity

max. 80 % relative (not condensing)

Permissible ambient
condition

10° C to 30° C

Balance dimensions

235 x 180 x 75 mm (excluding draft shield)

235 x 185 x 165 mm (including draft shield)

Vibratory filter

4

Mains supply

Mains adaptor 230 V, 50/60 Hz ; 9 V DC balance,

200 mA

Interface

RS 232 C interfaced

Rechargeable battery

optional

Underfloor weighing

Hanging loop optional

EW/EG-N/EWB-e-1125

7

KERN

EW 820-2NM

EW 2200-2NM

EW 4200-2NM

Readout

0,01 g

0,01 g

0,01 g

Verification value (e)

0,01 g

0,1 g

0,1 g

Weighing range (max.)

820 g

2200 g

4200 g

Class of accuracy

I

II

II

Taring range (subtractive)

820 g

2200 g

4200 g

Minimum load (Min)

1 g

0,5 g

0,5 g

Minimum weight for count­ing parts

0,01 g

0,01 g

0,01 g

Reference quantity

10, 30, 50, 100

10, 30, 50, 100

10, 30, 50, 100

Reproducibility

0,01 g

0,01 g

0,01 g

Linearity

± 0,01 g

± 0,02 g

± 0,02 g

Recommended adjusting
weight, not included (class)

1 x 200 g

+ 1 x 500 g(F1)

2000 g (F1)

2 x 2 kg (E2)

Stabilization time

2 sec.

2 sec.

2 sec.

Weighing plate stainless
steel

170 x 142 mm

180 x 160 mm

180 x 160 mm

Weight kg (net)

1,3

2,8

2,8

Units,
verification switch in verifi­cation position,(chap. 5.10)

g, ct

Units ,
verification switch not in
verification position,
(chap. 5.10)

g, ct, oz, lb, ozt, dwt, GN, tl (HongKong), tl (Taiwan),

tl (Singapore, Malaysia), momme, tola

Air humidity

max. 80 % relative (not condensing)

Permissible ambient
condition

10° C to 30° C

Balance dimensions
excluding draft shield

180 x 235 x 75 mm

190 x 265 x 90 mm

Vibratory filter

4

Mains supply

Mains adaptor 230 V, 50/60 Hz ; 9 V DC balance,

200 mA

Interface

RS 232 C interfaced

Rechargeable battery

optional

Underfloor weighing

Hanging loop optional

EW/EG-N/EWB-e-1125

8

KERN

EW 6200-2NM

EW 12000-1NM

Readout

0,01 g

0,1 g

Verification value (e)

0,1 g

1 g

Weighing range (max.)

6 200 g

12 000 g

Class of accuracy

I

II

Taring range (subtractive)

6 200 g

12 000 g

Minimum load (Min)

1 g

5 g

Minimum weight for counting
parts

0,01 g

0,1 g

Reference quantity

10, 30, 50, 100

10, 30, 50, 100

Reproducibility

0,02 g

0,1 g

Linearity

± 0, 03 g

± 0,1 g

Recommended adjusting
weight, not included (class)

5 kg (E2)

10 kg (F1)

Stabilization time

3 sec.

3 sec.

Weight kg (net)

2,8

2,8

Units,
verification switch in verifica­tion position,(chap. 5.10)

g, ct

Units ,
verification switch not in veri­fication position,
(chap. 5.10)

g, ct, oz, lb, ozt, dwt, GN, tl (HongKong), tl (Taiwan),

tl (Singapore, Malaysia), momme, tola

Air humidity

max. 80 % relative (not condensing)

Permissible ambient
condition

10° C to 30° C

Weighing plate stainless steel

180 x 160 mm

Balance dimensions

190 x 265 x 90 mm (excluding draft shield)

Vibratory filter

4

Mains supply

Mains adapter 230 V, 50/60 Hz ; 9 V DC balance,

200 mA

Interface

RS 232 C interfaced

Rechargeable battery

optional

Underfloor weighing

Hanging loop optional

EW/EG-N/EWB-e-1125

9

KERN

EWB 220-2M

EWB 620-2M

EWB 1200-1M

Readout

0,01 g

0,01 g

0,1 g

Verification value (e)

0,01 g

0,1 g

0,1 g

Weighing range (max.)

220 g

620 g

1 200 g

Class of accuracy

II

II

II

Taring range (subtractive)

220 g

620 g

1 200 g

Minimum load (Min)

0,2 g

0,5 g

5 g

Minimum weight for
counting parts

0,01 g

0,01 g

0,1 g

Reference quantity

10, 30, 50, 100

10, 30, 50, 100

10, 30, 50, 100

Reproducibility

0,01 g

0,01 g

0,1 g

Linearity

± 0,01 g

± 0,01 g

± 0,1 g

Recommended adjusting
weight, not included
(class)

200 g (M1)

500 g (F2)

1 000 g (M1)

Stabilization time

2 sec

2 sec

3 sec

Weight kg (net)

1,1

1,1

1,3

Units,
verification switch in veri­fication position,(chap.

5.10)

g, ct

Units ,
verification switch not in
verification position,
(chap. 5.10)

g, ct, oz, lb, ozt, dwt, tl (HongKong),

tl (Taiwan), tl (Singapore, Malaysia), momme, tola

Air humidity

max. 80 % relative (not condensing)

Permissible ambient
condition

10° C bis 30° C

Weighing plate stainless
steel

ø 140 mm

170 x 140

Balance dimensions

182 x 235 x 75 mm

Vibratory filter

4

Mains supply

Mains adapter 230 V, 50/60 Hz ; 9 V DC balance, 300 mA

Rechargeable battery

optional

Underfloor weighing

Hanging loop optional

EW/EG-N/EWB-e-1125

10

Weighing unit

EW 120-4NM

EG 220-3NM /
EW 220-3NM

EG 420-3NM /
EW 420-3NM

g

0.0002

0.001

0.001

(ct)

0.001

0.01

0.01

(oz)

0.00001

0.0001

0.0001

(lb)

0.00001

0.00001

0.00001

(ozt)

0.00001

0.0001

0.0001

(dwt)

0.0002

0.001

0.001

(grain)

0.01

0.1

0.1

(Hong Kong)

0.00001

0.0001

0.0001

(Singapore,Malaysia)

0.00001

0.0001

0.0001

(Taiwan)

0.00001

0.0001

0.0001

mom

0.0001

0.001

0.001

(to)

0.00002

0.0001

0.0001

Weighing unit

EG 620-3NM /
EW 620-3NM

EW 820-2NM

EG 2200-2NM/
EW 2200-2NM

g

0.001

0.01

0.01

(ct)

0.01

0.05

0.1

(oz)

0.0001

0.0005

0.001

(lb)

0.00001

0.00005

0.0001

(ozt)

0.0001

0.0005

0.001

(dwt)

0.001

0.01

0.01

(Hong Kong)

0.1

0.0005

0.001

(Singapore,Malaysia)

0.0001

0.0005

0.001

(Taiwan)

0.0001

0.0005

0.001

mom

0.0001

0.005

0.01

(to)

0.001

0.001

0.001

0.0001

Weighing unit

EG 4200-2NM/
EW 4200-2NM

EW 6200-2NM

EW 12000-1NM

g

0.01

0.01

0.1

(ct)

0.1

0.1

1

(oz)

0.001

0.001

0.01

(lb)

0.0001

0.0001

0.001

(ozt)

0.001

0.001

0.01

(dwt)

0.01

0.01

0.1

(Hong Kong)

0.001

0.001

0.01

(Singapore,Malaysia)

0.001

0.001

0.01

(Taiwan)

0.001

0.001

0.01

mom

0.01

0.01

0.1

(to)

0.001

0.001

0.01

1.1 Read-off of the various weighing units

EW/EG-N/EWB-e-1125

11

Weighing unit

EWB 220-2M

EWB 620-2M

EWB 1200-1M

g

0.01

0.01

0.1

(ct)

0.1

0.1

1

(oz)

0.001

0.001

0.01

(lb)

0.0001

0.0001

0.001

(ozt)

0.001

0.001

0.01

(dwt)

0.01

0.01

0.1

(Hong Kong)

0.001

0.001

0.01

(Singapore,Malaysia)

0.001

0.001

0.01

(Taiwan)

0.001

0.001

0.01

mom

0.01

0.01

0.1

(to)

0.001

0.001

0.01

Weighing unit

Gramm

Carat

Ounze

Pound

Fine

ounze

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

1.2 Weighing unit conversion charts

EW/EG-N/EWB-e-1125

12

2 Fundamental information (general)

2.1 Intended use

The balance you have acquired serves to determine the weighing value of the mate­rial to be weighed. It is intended to be used as a “non-automatic“ balance, i.e. the
material to be weighed is manually and carefully placed in the centre of the weighing
plate. The weighing value can be read off after a stable weighing value has been
obtained.

2.2 Inappropriate use

Do not use the balance for dynamic weighing. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“ in the balance. (Example: Slowly drain­ing fluids from a container on the balance.)
Do not leave a permanent load on the weighing plate. This can damage the measur­ing equipment.
Be sure to avoid impact shock and overloading the balance in excess of the pre­scribed maximum load rating (max.), minus any possible tare weight that is already
present. This could cause damage to the balance.
Never operate the balance in hazardous locations. The series design is not explo­sion-proof.
Structural alterations may not be made to the balance. This can lead to incorrect
weighing results, faults concerning safety regulations as well as to destruction of the
balance.
The balance may only be used in compliance with the described guidelines. Varying
areas of application/planned use must be approved by KERN in writing.

2.3 Guarantee

The guarantee is not valid following

- non-observation of our guidelines in the operating instructions

- use outside the described applications

- alteration to or opening of the device

- mechanical damage and damage caused by media, liquids

- natural wear and tear

- inappropriate erection or electric installation

- overloading of the measuring equipment

EW/EG-N/EWB-e-1125

13

 Keep all parts of the original packaging for a possibly required re-

turn.

 Only use original packaging for returning.
 Prior to dispatch disconnect all cables and remove loose/mobile

parts.

 Reattach possibly supplied transport securing devices.
 Secure all parts such as the glass wind screen, the weighing plat-

form, power unit etc. against shifting and damage.

2.4 Monitoring the test substances

The metrology features of the balance and any possible available adjusting weight
must be checked at regular intervals within the scope of quality assurance. For this
purpose, the answerable user must define a suitable interval as well as the nature
and scope of this check. Information is available on KERN’s home page (www.kern­sohn.com) with regard to the monitoring of balance test substances and the test
weights required for this. Test weights and balances can be adjusted quickly and at
a reasonable price in KERN’s accredited DKD calibration laboratory (return to na­tional normal).

3 Fundamental safety information

3.1 Observe the information in the operating instructions

Please read the operating instructions carefully before erecting and commissioning,
even if you already have experience with KERN balances.

3.2 Staff training

The device may only be operated and looked after by trained members of staff.

4 Transport and storage

4.1 Acceptance check

Please check the packaging immediately upon delivery and the device during un­packing for any visible signs of external damage.

4.2 Packaging / return transport

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5 Unpacking, installation and commissioning

5.1 Place of installation, place of use

The balance is constructed in such a way that reliable weighing results can be
achieved under normal application conditions.
By selecting the correct location for your balance, you will be able to work quickly
and precisely.

Therefore please observe the following at the place of installation:

- Place the balance on a firm, level surface;

- Avoid extreme heat as well as temperature fluctuation caused by installing

next to a radiator or in the direct sunlight;

- Protect the balance against direct draughts due to open windows and doors;

- Avoid jarring during weighing;

- Protect the balance against high humidity, vapours and dust;

- Do not expose the device to extreme dampness for longer periods of time. In-

admissible bedewing (condensation of air moisture on the device) can occur if
a cold device is taken into a significantly warmer environment. In this case,
please acclimatise the device for approx. 2 hours at room temperature after it
has been disconnected from the mains.

- Avoid static charging of the material to be weighed, weighing container and

windshield.

Major display deviations (incorrect weighing results) are possible if electromagnetic
fields occur as well as due to static charging and instable power supply. It is then
necessary to change the location.

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(1) Balance

(2) Weighing plate

(3) Weighing plate bracket

(4) Windbreak

(excl. EWB models)

(5) Interface connector set

(excl. EWB models)

(6) Operating instructions

(7) Mains adaptor

5.2 Unpacking

Carefully remove the balance from its packaging, remove the plastic wrapping and
position the balance in its intended working location.

5.2.1 Installation

Use the foot screws to level the balance until the air bubble in the bubble level is in
the prescribed circle.

5.2.2 List of items supplied

Standard accessories:

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Screw the bracket on tightly according to
the drawing and subsequently attach the
weighing plate.

5.2.3 Positioning the weighing plate

5.2.4 Serial draft shield installation
(Only for models with readout d = 0,001 g standard)

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5.2.5 Draft shield installation – optional

Remove the weighing plate and loosen the screws to remove the bracket. Use a
screwdriver to loosen both screws to the left and right of the bracket guide and re­move.
Now place the draft shield to fit on the housing and and secure through the opened
sliding doors using both screws.
Screw the bracket on tightly according to the drawing and subsequently attach the
weighing plate.

5.2.6 Draft shield with glass sliding doors

(only model KERN EW 120-4NM standard)

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