KERN Precision balances EWJ series Non-approved models, 0,001 g, 300 g, EWJ 300-3 (W) User guide

KERN & Sohn GmbH

Ziegelei 1

E-Mail: [e-mail]

Phone: +49-[0]7433- 9933-0

Internet: www.kern-sohn.com

Operating manual
Precision balances

KERN EWJ

Version 1.2

08/2014

GB

D-72336 Balingen

Fax: +49-[0]7433-9933-149

EWJ-BA-e-1412

GB

KERN EWJ

Precision balance

Version 1.2 08/2014

Operating manual

Contents

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

2 Appliance overview ....................................................................................... 6

2.1 Keyboard overview ..................................................................................................................... 8

2.2 Overview of display .................................................................................................................... 9

3 Basic Information (Gen eral) ........................................................................ 10

3.1 Proper use ................................................................................................................................ 10

3.2 Improper Use ............................................................................................................................ 10

3.3 Warranty ................................................................................................................................... 10

3.4 Monitoring of Test Resources................................................................................................... 11

4 Basic Safety Precauti o ns ............................................................................ 11

4.1 Pay attention to the instructions in the Operation Manual ........................................................ 11

4.2 Personnel training ..................................................................................................................... 11

5 Transport and storage ................................................................................. 11

5.1 Testing upon acceptance ......................................................................................................... 11

5.2 Packaging / return transport ..................................................................................................... 11

6 Unpacking, Setup and Commissioning ..................................................... 12

6.1 Installation Site, Location of Use .............................................................................................. 12

6.2 Unpacking, Scope of delivery ................................................................................................... 12

6.2.1 Scope of delivery / serial accessories: ..................................................................................... 12

6.2.2 Installing / removing transport fittings ....................................................................................... 13

6.3 Mains connection ...................................................................................................................... 13

6.4 Storage battery operation (optional) ......................................................................................... 14

6.5 Connection of peripheral devices ............................................................................................. 14

6.6 Initial Commissioning ................................................................................................................ 14

6.7 Adjustment ................................................................................................................................ 15

6.7.1 Manual internal adjustment by pressing button ........................................................................ 15

6.7.2 Automatic internal adjustment .................................................................................................. 16

6.8 Verification ................................................................................................................................ 17

7 Operation ...................................................................................................... 18

7.1 Start-up ..................................................................................................................................... 18

7.2 Switching Off ............................................................................................................................ 18

7.3 Zeroing...................................................................................................................................... 18

7.6 Percent determination .............................................................................................................. 19

7.7 Parts counting ........................................................................................................................... 20

7.8 Manual totalizing ....................................................................................................................... 21

7.9 Automatic adding-up ................................................................................................................. 24

2 EWJ-BA-e-1412

8 Menu ............................................................................................................. 26

8.1 Navigation in the menu ............................................................................................................. 26

8.2 Access to technology menu...................................................................................................... 27

8.3 Overview ................................................................................................................................... 28

9 Interfaces ...................................................................................................... 31

9.1 Technical data .......................................................................................................................... 31

9.2 Printer operation (RS 232)........................................................................................................ 32

9.3 Output log (continuous output) ................................................................................................. 33

10 Servicing, maintenance, disposal .............................................................. 33

10.1 Clean ........................................................................................................................................ 33

10.2 Servicing, maintenance ............................................................................................................ 33

10.3 Disposal .................................................................................................................................... 33

11 Instant help ................................................................................................... 34

12 Declaration of conformity ........................................................................... 35

EWJ-BA-e-1412 3

1 Technical data

KERN EWJ 300-3 EWJ 300-3H EWJ 3000-2

Readability (d) 0.001 g 0.001 g 0.01 g
Weighing range (max) 300 g 300 g 3000 g
Reproducibility 0.001g 0.001g 0.02 g
Linearity ±0.003 g ±0.003 g ±0.05 g
Smallest part weight for

piece counting
Reference quantities at

piece counting
Weighing Units
Adjustment internal
Warm-up time 2 hours
Stabilization time (typical) 3 sec.

Operating temperature + 5° C .... + 40° C

Humidity of air max. 80 % (not condensing)
Dimensions, completely

assembled (wind shield)
(W x D x H) mm

Dimensions of the housi ng
(B x D x H) mm

Dimensions of windshield
inside (B x D x H) mm

2 mg 2 mg 20 mg

10, 20, 50, 100, 200

g, ct, dwt, lb, mo, oz, ozt, tl (HK), tl (Singap., Malays), tl (Tw)

220 x 315 x 180 220 x 315 x 321 220 x 315 x 180

220 x 315 x 95

145 x 160 x 80 155 x 175 x 217 -

Dimensions of windshield
outside (B x D x H) mm

Weighing plate, stainless steel
(mm)

Weight kg (net) 2200 g 2560 g 2900 g
Input voltage balance 12 V / 2500 mA
Rechargeable battery (optional) Service life – background illumination ON 10 h

Interfaces RS-232

4 EWJ-BA-e-1412

158 x 143 x 82 180 x 191 x 230 -

Ø 80 Ø 135

Operating time – background illumination OFF 15

Loading time 4h

USB

KERN EWJ 600-2M EWJ 6000-1M

Readability (d) 0.01 g 0.1 g
Weighing range (max) 600 g 6000 g
Reproducibility 0.01 g 0.1 g
Linearity ± 0,03 g ± 0.3 g
Verification value (e) 100 mg 1 g
Verification class II II
Minimum weight (min) 500 mg 5 g
Smallest part weight for

piece counting
Reference quantities at

piece counting
Weighing unit g g
Adjustment internal
Warm-up time 2 hours 2 hours
Stabilization time (typical) 3 sec.

Operating temperature + 5° C .... + 40° C

Humidity of air max. 80 % (not condensing)
Dimensions fully mounted (wind

shield) (W x D x H) mm
Dimensions of the housi ng

(B x D x H) (mm)
Dimensions of windshield

inside (B x D x H) mm

20 mg 20 mg

10, 20, 50, 100, 200

220 x 315 x 180 -

220 x 315 x 95

145 x 160 x 80 -

Dimensions of windshield
outside (B x D x H) mm

Weighing plate, stainless steel
(mm)

Weight kg (net) 2560 g 2900 g
Input voltage balance 12 V / 2500 mA
Rechargeable battery (optional) Service life – background illumination ON 10 h

Interfaces RS-232

EWJ-BA-e-1412 5

158 x 143 x 82 -

Ø 135 155 x 145

Operating time – background illumination OFF 15

Loading time 4h

USB

2 Appliance overview

Example EWJ 300-3 / EWJ 600-2M:

1. Windshield

2. Weighing pan

3. Levelling screw

4. Bubble level

5. Keyboard

6. Display

7. RS-232

8. USB

9. Terminal power supply unit

10. Battery compartment

11. Transportation locks

12. Adjustment switch

6 EWJ-BA-e-1412

Example EWJ 300-3H:

13. Windshield

14. Weighing pan

15. Display

16. Bubble level

17. Keyboard

18. Levelling screw

19. RS-232

20. USB

21. Terminal power supply unit

22. Battery compartment

23. Transportation locks

24. Adjustment switch

EWJ-BA-e-1412 7

2.1 Keyboard overvie w

Key Function Function in Menu

Calculate weighing data via
interface

Switch-over weighing unit Scroll forward in menu

Parts counting
Delete total added m e mor y

Percent determination
Start internal adjustment (longer

pressing of the button)

Taring

Zeroing Take over selected setting

Exit menu / back to weighing mode.

Turn on/off

8 EWJ-BA-e-1412

2.2 Overview of display

Capacity display

Zero indicator
The displayed weighing value is a net weighing value

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.

ο

Pcs Indicator for counting

% Indicator for percent deter mination

fully loaded
1/2 loaded

empty

Stability display

Currently selected weight unit
Loading status of the rechargeable battery (prerequisite

menu setting „P9batt on“, see chap. 8.2).
The number of segments informs about the loading

status of the rechargeable battery.

EWJ-BA-e-1412 9

3 Basic Information (General)

3.1 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
pan. As soon as a stable weighing value is reached the weighing value can be read.

3.2 Improper Use

Do not use 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“. (Example: Slowly draining fluids from a
container on the balance.)
Do not leave permanent load on the weighing pan. This m ay 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 faul ts and des tr uct ion 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.

3.3 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 and damage caused by media, liquids,

natural wear and tear

• The appliance is improperly set up or incorrectly electrically connected

• The measuring system is overloaded

10 EWJ-BA-e-1412

3.4 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.

4 Basic Safety Precautions

4.1 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.

4.2 Personnel training

The appliance may only be operated and maintained by trained personnel.

All language versions contain a non-binding translation.
The original German is binding.

5 T ransport and storage

5.1 Testing upon acceptance

When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.

5.2 Packaging / return transport

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

return.

 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

platform, power unit etc. against shifting and damage.

EWJ-BA-e-1412 11

6 Unpacking, Setup and Commi s si oning

• Balance, see chap. 2

6.1 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, vapours and dust;

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

Non-permitted condensation (co ndensation 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.

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.

6.2 Unpacking, Scope of delivery

Remove device and accessories carefully from packaging, remove packaging
material and place device at the planned work place. Verify that there has been no
damage and that all packing items are present.

6.2.1 Scope of delivery / serial accessories:

• Mains adapter

• Protective cover

• Operating manual

• Transport Securing

• Glass wind shield only models EWJ 300-3, EWJ 300-3H, EWJ 600-2M

12 EWJ-BA-e-1412

6.2.2 Installing / removing transport fittings

 Removing transport locking devices

 Level balance with foot screws until the air bubble of the water balance is in the

prescribed circle.

 Check levelling regularly

The right place is decisive for the accuracy of the weighing results of high-resolution
precision balances (see chap. 6.1).

 Install weighing plate and wind shield if necessary.

6.3 Mains connection

Power is supplied via the external mains adapter. The stated voltage value must be
the same as the local voltage.
Only use KERN original mains adapter. Using other makes requires consent by
KERN.

EWJ-BA-e-1412 13

6.4 Storage battery operation (optional)

Before the first use, the battery should be charged by connecting it to the mains
power supply for at least 12 hours.
The LED display provides information about the battery's charging status.

Voltage has dropped below prescribed minimum.

Rechargeable battery very low.

Rechargeable battery completely reloaded

To spare the rechargeable battery the permanent background illumination of the
display can be switched off in the menu item „F2 bl“, see chapter 8.2.

6.5 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.

6.6 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).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.

14 EWJ-BA-e-1412

6.7 Adjustment

warm-up time.

As the acceleration value due to gravity is not the same at every location on earth,
each display unit with connected weighing plate 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 weighing system has not already been
adjusted to the location in the factory). This adjustment process must be carried out
for the first commissioning, after each change of location as well as in case of
fluctuating environment temperature. To receive accurate measuring values it is also
recommended to adjust the display unit periodically in weighing operation.

• Observe stable environmental conditions. Stabilisation requires a certain

6.7.1 Manual internal adjustment by pressing button

 In weighing mode keep pressed as long as „CAL“ is displayed

 The motor noise of the loading system for the internal adjustment weight can be

heard, the internal adjustment is started.
After successful adjustment „PASS“ will be displayed. The balance returns
automatically into weighing mode.

EWJ-BA-e-1412 15

6.7.2 Automatic internal adjustment

Automatic adjustment takes place:

• when the balance is switched off and on.

• at the end of a time interval

After a set time interval (selectable 1 – 8 hrs.) in the menu (F5 HoUr, see chap.

8.3) the internal adjustment is automatically started.

 The motor noise of the loading system for the internal adjustment weight can be

heard, the internal adjustment is started.
After successful adjustment „PASS“ will be displayed. The balance returns
automatically into weighing mode.

16 EWJ-BA-e-1412

6.8 Verification General introduction:

According to EU directive 90/384/EEC or 2009/23EG b al ances 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 notes:

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 be verified and re-verified at 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.

The seal marks attached on balances with type approval point out that the
balance may only be opened and serviced by trained and authorised
specialist staff. If the seal mark is destroyed, verification looses its validity.
Please observe all national laws and legal regulations. In Germany a re­verification will be necessary.

Position of seals and adjusting switch:

1. Self-destroying seal mark

2. Plastic disk to cover the adjustment switch

3. Adjustment switch

4. Lead

5. Wire

6. Housing screw

EWJ-BA-e-1412 17

7 Operation

Overload warning

sound. Unload weighing system or reduce preload.

7.1 Start-up

 Press .

The display is shining and the motor noise of the loading system for t he int er nal
adjustment weight can be heard.
The balance carries out a selftest, the maximum load and software version will
also be shortly displayed, followed by the internal adjustment. During this
process „CAL“ appears in the display.
As soon as the weight display appears, the balance is ready for weighing.

7.2 Switching Off

 Press , the display will disappear.

7.3 Zeroing

Resetting to zero corrects the influence of light soiling on the weighing plate.

 Unload the balance

 Press and zero display as well as indicator will appear.

7.4 Simple weighing

 Place goods to be weighed on balance.
 Wait for stability display .

 Read weighing result.

Overloading exceeding the stated maximum load (max) of the device, minus a
possibly existing tare load, must be strictly avoided. This could damage the
instrument.
Exceeding maximum load is indicated by the display of „----“ and an audio

18 EWJ-BA-e-1412

7.5 Weighing with tare

• The balance is able to only store one taring value at a time.
When the balance is unloaded the saved taring value is displayed with

when the taring range capacit y is full .

 Deposit empty weighing container. Wait for stability display, then press .

Zero display appears. The weight of the container is now internally saved.

 Weigh the material, the net weight will be indicated.

•
negative sign.

• To delete the stored tare value remove load form the weighing plate and
press .

• The taring process can be repeated any number of times, e.g. when
adding several components for a mixture (adding). The limit is reached

7.6 Percent determination

Percent weighing allows to display weight in percent, in relation to a reference
weight.

Put the nominal weight

 Place the nominal weight (reference weight which corresponds to 100 %).

 Wait for stability display, then press . 100% is displayed.

Percent weighing /commutation

 Place goods to be weighed on balance.

The weight of the item to be weighed is displayed in percent, with reference to the
nominal weight.

 Press , the weight of the item to be weighed is displayed in the current

weighing unit e.g. gram.

EWJ-BA-e-1412 19

7.7 Parts counting

Before the balance can count parts, it must know the average part weight (i.e.
reference). Proce ed by putting on a certain number of the parts to be counted. The
balance determines the total weight and divides it by the number of parts, the so­called reference quantity. Counting is then carried out on the basis of the calculated
average piece weight.
As a rule:
The higher the reference quantity the higher the counting exactness.

Set reference

 Press , the current reference quantity (e.g. 10) and the indicator Pcs are

displayed.

 Use to set the desired reference quantity (e.g. 100), selectable SP 10, SP

20, SP 50, SP100, SP 200.

 Place as many items to be counted (such as 100 items) as demanded by the set

reference quantity and c on fir m by . The weighing scales calculate the
reference weight. The current quantity (such as 100 items) will be displayed.

 Remove reference weight. The balance is from now in parts counting mode

counting all units on the weighing plate.

Switching over between quantity and weight display

 Place load on pan and read the number of pieces.

 Press , the weight will be displayed.

20 EWJ-BA-e-1412

7.8 Manual totalizing

• For menu settings, see chapter 8.2:

• The totalizing function is not active when the weight is under 20d.

With this function the individual weighing values are added into the summation
memory by pressing and edited, when an optional printer is connected.

The totalizing function is only available at menu setting
„SALE-Mode no“, see chap. 8.2.

„F3 COM“  „S 232“  „P Prt“

Add up:

 Place item to be weighed A, e.g. 100 g.

Wait for stability display, then press . The weight value will be saved and
printed if an optional printer is connected. The number of weighings, followed by
the total weight will be indicated.

„SALE n“

 Remove the weighed good. More weighed goods can only be added when the

display ≤ zero.



EWJ-BA-e-1412 21

 Place item to be weighed B, e.g. 200 g.

Wait for stability display, then press . The weight value will be added to the
summation memory and edited. Number of weighings, followed by the total weight
will be displayed for 2 sec. After that the current weighing value is displayed.

 Add more weighed goods as described before.

Please note that the weighing system must be unloaded between the individual
weighing procedures.

This process may be repeated 99 times or till such time as the capacity of the
weighing system has been exhausted.

22 EWJ-BA-e-1412

Display and output sum „Total“:

1:

100.00 g

First weighing

G:

100.00 g

2:

200.00 g

Second weighing

G:

200.00 g

1-2:

300.00 g

Total of weighing proces s es 1 - 2

 When the balance is unloaded (zero display) press , the number of

weighings, followed by the total weight will be shown for 2 sec and printed if an
optional printer is connected.

Delete total added memory:

 When display „Sum „Tota l “ “ appears, press . The data in the summation

memory are deleted.

Printout example (KERN YKB-01N):

EWJ-BA-e-1412 23

7.9 Automatic adding-up

• Menu settings, chap. 8.2:

• The totalizing function is not active when the weight is under 20d.

With this function the individual weighing values are automatically added into the
summation memory when the bala nce is unloaded without pressi n g and edited,

when an optional printer is connected.

The totalizing function is only available at menu setting
„SALE-Mode no“, see chap. 8.2.

„F3 COM“  „S 232  „P AU t o“

Add up:

 Place item to be weighed A, e.g. 100 g.

After stabilisation control has taken place, you will hear an audio sound.

„SALE n“

 Remove the weighed good. The weighing value is added to the summation

memory and printed if an optional printer is connected.

 More weighed goods can only be added when the display ≤ zero.
 Place item to be weighed B, e.g. 200 g.

After stabilisation control has taken place, you will hear an audio sound.

24 EWJ-BA-e-1412

 Remove the weighed good. The weighing value is added to the summation

7.9.

memory and printed if an optional printer is connected. Number of weighings,
followed by the total weight will be displayed for 2 sec.

 Add more weighed goods as described before.

Please note that the weighing system must be unloaded between the individual
weighing procedures.

This process may be repeated 99 times or till such time as the capacity of the
weighing system has been exhausted.

Display and delete the weighing data, as well as printout examples see chap.

EWJ-BA-e-1412 25

8 Menu

selected one after the other.

current setting will be displayed.

8.1 Navigation in the menu Call up menu

Select menu item

Select setting

Change settings

Acknowledge setting /
exit the menu

Return to weighing
mode

 Switch-on balance and during the selftest press .

The first menu item „F1 Unt„ is displayed.

 With help of , the individual menu items can be

 Confirm selected menu item by pressing . The

 Switch into the available settings using .

 Either save by pressing or cancel by pressing .

 Press repeatedly to exit menu.

26 EWJ-BA-e-1412

8.2 Access to technology menu

, , .

subject to verification.

The access to the technology menu „tECH“ is locked by the key combination

When on balances with type approval „tECH“ is displayed, the seal mark must be
destroyed and the adjustment switch be actuated. Position of adjustment switch see
chap. 6.11

Attention:
After destruction of the seal the balance must be re-verified by an authorised agency
and a new verification wire/seal mark fitted before it can be reused for applications

EWJ-BA-e-1412 27

8.3 Overview

F3 Com

P Prt*

• Output of a stable weighing value after pressing

to the summation memory and issued.

P Cont

Continuous data output
see chap. 9.3

P AUto

For automatic add-up see chap. 7.10.

memory on unloading of weighing scale.

wirel

Not documented

Remote control instructions

Command

Function

S

Stable weighing value for the weight is sent
via the interface

W

Weighing value for the weight (stable or
unstable) is sent via the interface

T

No data are sent, the balance carries out
the tare function.

Z

No data are sent, the zero-display appears.

P

Quantity will be sent via the interface

Acknowledge selection by .

Factory settings are marked by *.

Menu block Menu item Available settings / explanation
F1 Unt

Weighing Units

F2 bl
Display

background
illumination

Interface
parameter

Not documented

EL AU*

EL on

Automatic background illumination on when
weighing pate is loaded or key pressed.

Background lighting of display is switched on
permanently

EO oFF Display background illumination off

S 232

Use to select interface: RS232 or USB

S USb

of
(menu setting „F4 ACC oFF“)

• Manual totalizing (menu setting „F4 ACC on“),

see chap. 7.9.
Press and the weighing value will be added

P ASK

Acknowledge selection by .
b600



b 9600*

This function is used to issue and add individual
weighing values automatically to the summation

Baud rate
600, 1200, 2400, 4800, 9600 selectable.

28 EWJ-BA-e-1412

Acknowledge selection by .

Eng*

Standard stetting English.
only displayed for setting „LP 50“

chi

F4 SPD

SPd L

Verifiable models:
“Low”

Non-verifiable models:

SPd 1

F5 HoUr

1 HoUr
8 HoUr

SAL E m

EWJ 300 -3:
d= 0.001 g

EWJ 600 -2M:
d= 0.01 g

EWJ 6000-1M:
d= 0.1 g

EWJ 300 -3:
d= 0.01 g

EWJ 600-2M:
d= 0.1 g

EWJ 6000-1M:
d= 1 g

applications subject t o v er i ficati on.

Display speed

tP Standard printer setting
LP 50 Not documented

Not documented

SPd n “Normal” SPd 2
SPd H “High” SPd 3
SPd 4

oFF Automatic adjustment switched off



bAttoF Mask loading status display „Recharg.battery“

P6 bAtt

bAtton Display loading status display „Recharg.battery“

The SALE mode is locked for balances with type approval.

To disable the access lock, destroy the seal and actuate the adjustment
switch. Position of the adjustment switch see chap. 6.11
Attention:
After destruction of the seal the balance must be re-verified by an authorised
agency and a new verification wire/seal mark fitted before it can be reused for

SALE n

SALE y

Time interval after which the automatic adjustment
starts, selectable 1, 2, 3,4, 5, 6, 7, 8 hours.

Sale mode no: d= 0.1g

Sale mode yes: d= 0.01 g

EWJ-BA-e-1412 29

XXXXX
X

P4 A 2n

A2n

0.5d

A2n 1d

A2n 2d*

A2n 4d

XXXXX
X

P6 CAP

tECH

Pin

P1 Lin Linearisation (not documented)
P2 CAL Adjustment (not documented)

P3 Cnt

P5 GrA

Technology menu, see chap. 8.2

At „Pin“ display press , , subsequently the first
menu block „P1 Lin“ will be displayed.

Display internal resolution

A2 oFF Automatic zero point correction switched off

Automatic zero point correction (Autozero) by
changing the display, digits selectable (0.5d, 1d, 2d,
4d)

Local gravitational constant (not documented)

XXXX Capacity (max)

30 EWJ-BA-e-1412

9 Interfaces

For menu settings, see chapter 8.2:

„F3 COM“  „S 232“

For menu settings, see chapter 8.2:

„F3 COM“  „USB“

Suitable peripheral devices:

Suitable peripheral devices:

connection).

Pin 5 signal earth

Via the interfaces weighing data may be exchanged with connected peripheral
devices.

RS 232 interface USB interface for PC connect io n

• Printer

• PC

• PC

On the PC a virtual COM-Port is installed,
which is recognized and triggered by the
PC software (e.g. KERN balance

We recommend the USB interface set KERN DBS A02 (scope of supply: USB
cable, driver CD, software balance connection.)

For further information please go to KERN-Homepage (www.kern-sohn.com).

The following conditions must be met to provide successful communication between
the weighing balance and the peripheral devices.

• Connect balance using a suitable cable with the interface of the peripheral
device. Faultless operation requires an adequate KERN interface cable.

• Communication parameters (baud rate, bits and parity) of balance and
peripheral device must match.

9.1 Technical data

Connection (RS 232) 9 pin d-subminiature bushing

Baud rate Optional 600/1200/2400/4800/9600
Parity 8 bits, no parity

EWJ-BA-e-1412 31

Pin 2 input
Pin 3 output

9.2 Printer operation (RS 232)

1:

49.99g

G

49.99g

1:

49.99g

G

49.99g

3:

149.99g

G

149.99g

1-3

299.97g

Printout examples (KERN YKB-01N):

1. Menu setting F3 COM „P Prt“

Gross weight G 300.00g

Net weight N: 100.0g

Percent determination PERC: 50.01 %

Parts counting PCS

UW:
G

Totalization

2. Menu setting F3 COM „P Cont“

20PCS

5.00027g
100g

stable / gross ST,GS: 50.00g

stable / net ST,NT: 50.0g

unstable / gross UT,GS: 50.00g

unstable / net UT,NT: 50.0g

Weighing values ≤ zero are not edited via the interface.

32 EWJ-BA-e-1412

9.3 Output log (continuous output)

Before any maintenance, cleaning and repair work disconnect
appliance from the oper ati ng v ol tag e.

HEADER1: ST = stable, US = instable
HEADER2: NT = net , GS = gross

10 Servic ing, maintenance, disposal

the

10.1 Clean

Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth
dampened with mild soap suds. Ensure that no liquid penetrates into the device.
Polish with a dry soft cloth.
Loose residue sample/powder can be removed carefully with a brush or manual
vacuum cleaner.

Spilled weighing goods must be removed immediately.

10.2 Servicing, maintenance

 The appliance may only be opened by trained service technicians who are

authorized by KERN.

 Before opening, disconnect from power supply.

10.3 Disposal

Disposal of packaging and appliance must be carried out by operator according to
valid national or regional law of the location where the appliance is used.

EWJ-BA-e-1412 33

11 Instant hel p

The displayed weight does

The displayed weight is

The weighing result is

In case of an error in the program process, briefly turn off the balance and disconnect
from power supply. The weighing process must then be restarted from the beginning.

Help:

Fault Possible cause

not glow.

permanently changing

obviously incorrect

• The balance is not switched on.

• The mains supply connection has been interrupted

(mains cable not plugged in/ faul ty).

• Power supply interrupted.

• Draught/air movement

• Table/floor vibrations

• Weighing pan has contact with other objects.

• Electromagnetic fields / static charging (choose

different location/switch off interfering device if
possible)

• The display of the balance is not at zero

• Adjustment is no longer correct.

• The balance is on an uneven surface.

Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.

• Great fluctuations in temperature.

• Warm-up time was ignored.

• Electromagnetic fields / static charging (choose

different location/switch off interfering device if
possible)

34 EWJ-BA-e-1412

12 Declaration of conformit y

KERN & Sohn GmbH

D-72322 Balingen-Frommern

E-Mail: [e-mail]

Tel: 0049-[0]7433- 9933-0

Internet: www.kern-sohn.de

D

Konformitäts­erklärung

Wir erklären hierm it, dass das Produkt , auf das sich diese Erk lärung bezieht,
mit den nachstehenden Normen übereinstimmt.

GB

Declaration of
conformity

We hereby declare that the product to which this dec laration refers conforms
with the following standards.

CZ

Prohlášení o
shode

Tímto prohlašujem e, že v ýrobek , k terého se toto proh láš ení t ýká, 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 res ponsabilité que le produit, auquel s e 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.

Signature

Datum

23.12.2013

Ort der Ausstellung

Place of issue

72336 Balingen

Albert Sauter
KERN & Sohn GmbH

Geschäftsführer

Managing director

KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0
Fax +49-[0]7433/9933-149, E-Mail: [e-mail], Internet: www.kern-sohn.com

Postfach 4052

Fax: 0049-[0]7433-9933-149

Declaration of conformity

EG-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

Electronic Balan ce: KERN EWJ

EU Directive Standards

2004/108/EC EN 55022: 2010

EN 61000-3-3: 2008
EN 55024: 2010

2006/95/EC EN 60950: 2006+A11:2009

Date

EWJ-BA-e-1412 35

Signatur