KERN AEJ_N, AES_N Operating Instructions Manual

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 instruct ions
Analytical balance

KERN AEJ_N/AES_N

Version 2.1

03/2013

GB

AEJ_N/AES_N-BA-e-1321

2 AEJ_N/AES_N-BA-e-1321

GB

KERN AEJ_N/AES_N

Version 2.1 03/2013

Operating instructions

Electronic analytical balance

Contents

1 TECHNICAL DATA ............................................................................................. 5

1.1 Dimensions ............................................................................................................................... 7

2 APPLIANCE OVERVIEW ................................................................................... 8

2.1 Display and Keyboard Summary ............................................................................................ 9

2.1.1 Numeric entry ....................................................................................................................... 10

3 BASIC INSTRUCTIONS ................................................................................... 11

3.1 Proper use ............................................................................................................................... 11

3.2 Improper Use .......................................................................................................................... 11

3.3 Warranty .................................................................................................................................. 11

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

4 BASIC SAFETY PRECAUTIONS ..................................................................... 12

4.1 Pay attention to the instructions in the Operation Manual ................................................ 12

4.2 Personnel training .................................................................................................................. 12

5 TR ANSPORT AND STORAGE ......................................................................... 12

5.1 Testing upon acceptance ...................................................................................................... 12

5.2 Packaging / return transport ................................................................................................. 12

6 UNPACKING, SETUP AND COMMISSIONING ............................................... 15

6.1 Installation Site, Location of Us e .......................................................................................... 15

6.2 Unpacking and checking ....................................................................................................... 15

6.2.1 Scope of delivery / serial accessories .................................................................................. 15

6.2.2 Placing .................................................................................................................................. 16

6.3 Mains connection ................................................................................................................... 16

6.3.1 Turning On the Power .......................................................................................................... 17

6.4 Connection of peripheral devices ......................................................................................... 17

6.5 Initial Commissioning ............................................................................................................ 17

AEJ_N/AES_N-BA-e-1321 3

7 ADJUSTMENT .................................................................................................. 18

7.1 Automatic adjustment using internal weight (AEJ only) .................................................... 19

7.2 Menu settings ......................................................................................................................... 21

7.2.1 P1.1 iCAL ............................................................................................................................. 21

7.2.2 P1.2 ECAL - External adjustment (AES models) ................................................................. 22

7.2.3 P1.3 tCAL – adjustment test ................................................................................................ 23

7.2.4 P1.4 ACAL – Start criteria of the automatic internal adjustment (AEJ only) ........................ 25

7.2.5 P1.5 CALt– time controlled automatic adjustment (AEJ only) ............................................. 26

7.2.6 P1.5 CALr– Enable/disable issue of adjustment protocol .................................................... 27

7.3 Verification .............................................................................................................................. 28

8 MENU ................................................................................................................ 30

8.1 Navigation in the menu .......................................................................................................... 32

8.2 Exit menu / back to weighing mode. .................................................................................... 33

9 WEIGHING FUNCTIONS P6 FUNC ................................................................. 34

9.1 Turn on/off balance ................................................................................................................ 34

9.2 Weighing ................................................................................................................................. 34

9.3 Standard weighing unit .......................................................................................................... 35

9.4 Weighing units switch-over ................................................................................................... 36

9.5 Taring ....................................................................................................................................... 36

9.6 Underfloor weighing ............................................................................................................... 37

9.7 Selecting the operating mode ............................................................................................... 38

9.7.1 Selecting accessible operating modes ................................................................................. 40

10 BALANCE SETTINGS “P3 READ” ............................................................. 41

10.1 Filter - adaptation to ambient conditions and weighing options ...................................... 41

10.2 Rest position control display – Adaptation of weighing speed ........................................ 42

10.3 Auto Zero ................................................................................................................................. 43

10.4 Hide last decimal place .......................................................................................................... 44

10.5 Di spensing mode “RAPID” .................................................................................................... 45

11 FURTHER USEFUL FUNCTIONS “P7 OTHER“ .......................................... 46

11.1 Di splay background illumination .......................................................................................... 46

11.2 Acoustic signal for key operation ......................................................................................... 47

11.3 P rint weighing settings .......................................................................................................... 48

4 AEJ_N/AES_N-BA-e-1321

12 GLP/ISO LOG “P2 GLP“ .............................................................................. 49

13 OPERATION MODES ................................................................................... 53

13.1 P arts counting ........................................................................................................................ 54

13.2 Weig h ing with tolerance range ............................................................................................. 58

13.3 P ercent determination............................................................................................................ 61

13.3.1 Determining the reference weight by weighing (function F4 PrcA) ................................. 61

13.3.2 Numeric entry of reference weight (function F4 Prcb) ..................................................... 62

13.4 Dosing...................................................................................................................................... 64

13.5 Determining the density of solid matter and fluids ............................................................ 65

13.6 P ipette calibration .................................................................................................................. 66

13.6.1 Entering parameters ........................................................................................................ 66

13.6.2 Carry out series of measurements for test volume V0 ..................................................... 67

13.6.3 Carry out series of measurements for test volume V

1/2

................................................... 68

13.6.4 Carry out series of measurements for test volume V1 ..................................................... 69

14 DATA OUTPUT RS 232 “P4 PRINT“ ............................................................ 71

14.1 Technical data ......................................................................................................................... 71

14.2 Interface cable ........................................................................................................................ 72

14.3 Menu settin g s “P4 PRINT“ .................................................................................................... 73

14.4 P rintout examples (KERN YKB-01N) .................................................................................... 78

14.5 Output lo g ............................................................................................................................... 79

14.5.1 Issue after pressing the PRINT ´button ........................................................................... 79

14.5.2 PC controlled output ........................................................................................................ 80

14.5.3 Output of date/time .......................................................................................................... 80

14.6 Remote control instructions ................................................................................................. 81

15 SERVICE, MAINTENANCE, DISPOSAL ...................................................... 82

15.1 Cleaning .................................................................................................................................. 82

15.2 Service, maintenance ............................................................................................................. 82

15.3 Disposal ................................................................................................................................... 82

16 INSTANT HELP ............................................................................................. 83

16.1 Error messages ...................................................................................................................... 84

17 DECLARATION OF CONFORMITY .............................................................. 85

AEJ_N/AES_N-BA-e-1321 5

1 Technical data

KERN AEJ 100-4NM AEJ 200-4NM AEJ 200-5NM

Readability (d) 0.1 mg 0.1 mg 0.01 mg / 0.1 mg
Weighing range (max) 160 g 220 g 60 g – 220 g
Minimum load (Min) 10 mg 10 mg 1 mg
Verification value (e) 1 mg 1 mg 1 mg
Verification class I I I
Reproducibility 0.2 mg 0.2 mg 0.04 mg / 0.2 mg
Linearity ± 0.3 mg ± 0.3 mg ± 0.1 mg / ± 0.3 mg
Stabilization time 4 sec.
Adjustment weight internal
Warm-up time 8 h
Weighing Units mg, g, ct
Smallest part weight for

piece counting

10 mg 10 mg 1 mg

Reference quantities at
piece counting

10, 20, 50, freely selectable

Weighing plate, stainless
steel

ø 85mm ø 70mm

Net weight (kg) 5.4
Permissible

ambient condition

+18° C to +30° C

Humidity of air 30 ~ 80 % relative (not condensing)
Input voltage 110 - 230 V - 240 V AC‚50 Hz
Power pack

secondary voltage

13.8 V

Interface RS 232C
Underfloor weighing

device

Hooks

6 AEJ_N/AES_N-BA-e-1321

KERN AES 100-4N AES 200-4N

Readability (d) 0.1 mg 0.1 mg
Weighing range (max) 160 g 220 g
Reproducibility 0.2 mg 0.2 mg
Linearity ± 0.3 mg ± 0.3 mg
Recommended adjusting

weight not supplied
(class)

150 g (E2) 200 g (E2)

Stabilization time 4 sec.
Warm-up time 8 h
Weighing Units g, mg, ct, oz, ozt, GN, mom, dwt, teal
Smallest part weight for

piece counting

10 mg

Reference quantities at
piece counting

10, 20, 50, freely selectable

Weighing plate, stainless
steel

ø 85mm

Net weight (kg) 5.4
Permissible

ambient condition

+18° C to +30° C

Humidity of air 30 ~ 80 % relative (not condensing)
Input voltage 110 - 230 V - 240 V AC‚50 Hz
Power pack

secondary voltage

13.8 V

Interface RS 232C
Underfloor weighing

device

Hooks

AEJ_N/AES_N-BA-e-1321 7

1.1 Dimensions

8 AEJ_N/AES_N-BA-e-1321

2 Appliance overview

1. Windshield

2. Weighing pan

3. Display

4. Keyboard

5. Levelling screw

6. Bubble level

7. Terminal power supply unit

8. RS232 interface

9. Not documented

AEJ_N/AES_N-BA-e-1321 9

2.1 Display and Keyboard Summ ary

1. Stability display

2. Zero indicator

3. The non-calibrated value is given in brackets in calibrated scales.

4. Weighing unit “g“

Key

Function

• Turn on/off

• Call up menu

• Activate operating mode

• Scroll backwards in menu

• Switch-over weighing unit

• Scroll forward in menu

• Calculate weighing data via interface

• Confirm / save

• Taring

• Zeroing

•

Exit menu / Return to weighing mode

10 AEJ_N/AES_N-BA-e-1321

2.1.1 Numeric entry

Key Description Function

Navigation button 

Increase flashing dig it

Navigation button 

Decrease flashing digi t

Navigation button 

Digit selection to the right

Navigation button 

Digit selection as per

Navigation button

Confirm entry

ESC Cancel input

AEJ_N/AES_N-BA-e-1321 11

3 Basic instructions

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 balcance”, 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 add-on weighing procedures, if small amounts of
goods to be weighed are removed or added. The “stability compensation“ installed in
the balance may result in displaying an incorrect measuring value! (Example: Slowly
draining fluids from a container on the balance.)
Do not leave permanent load on the weighing pan. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (m ax) 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 dest ruc ti on o f the bala nce.
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 or damage by media, liquids, natural wear and tear

• The appliance is improperly set up or incorrectly electrically connected

• The measuring system is overloaded

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.

12 AEJ_N/AES_N-BA-e-1321

4 Basic Safety Precautions

4.1 Pay attention to the instruc t ions in the Operation Manual

 Carefully read this operation manual before setup and

commissioning, even if you are already familiar with KERN balances.

 All language versions contain a non-binding translation.

The original German is binding.

4.2 Personnel training

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

5 Transport 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.

AEJ_N/AES_N-BA-e-1321 13

 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.

14 AEJ_N/AES_N-BA-e-1321

AEJ_N/AES_N-BA-e-1321 15

6 Unpacking, Setup and Commissioning

6.1 Installation Site, Locati on of Us e

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 nd ens a ti on o f air humidi ty 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.

If electro-magnetic fields or static charge occur, or if the power supply is unstable
major deviations on the display (incorrect weighing results) are possible. In that case,
the location must be chang ed.

6.2 Unpacking and checking

Open package, take out the appliance and accessories. Verify that there has been no
damage and that all packing items are present.

6.2.1 Scope of delivery / serial accessories

• Balance, see chap. 2

• Mains adapter

• Operating instructions

• Protective cover

16 AEJ_N/AES_N-BA-e-1321

6.2.2 Placing

 Installation of weighing plate

Models with weighing pan ø 85mm Models with weighing pan ø 70mm

 Assemble all parts in the right order.
 Close gates.
 For instructions on how to connect the weighing scale to the

power supply see chap. 6.3.

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

prescribed circle

 Check levelling regularly

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 original KERN mains adapters. Using other makes requires consent by
KERN.

AEJ_N/AES_N-BA-e-1321 17

6.3.1 Turning On the Power



Supply balance with power via the mains adapter. The display unit lights
up and shown the software version. The weighing scale carries out a self­test and automatically moves into weighing mode.
In the AEJ models an automatic adjustment takes place.

6.4 Connection of periphera l devi c e s

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.

6.5 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.

18 AEJ_N/AES_N-BA-e-1321

7 Adjustment

As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordina ted - in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location
(only if the balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out for the first commissioning, after each
change of location as well as in case of fluctuating environment temperature. To
receive accurate measur i ng values it is also recommended to adjust the balance
periodically in weighing operation.

Possible adjustments include:

• Automatic adjustment using internal weights (AEJ models only)
For time and temperature controlled see chap. 7.1.

• Manual adjustment (AEJ models only)
Activated by pressing the F-key three times, see chap. 7.2.1

• Adjustment with external weight, see chap. 7.2.2

• Adjustment can only be carried out when the weighing pan is free of objects.

Any loads remaining on the weighing pan will be indicated by error message
Er1Hi.

• You can cancel the adjustment by pressing the TARE-key.

AEJ_N/AES_N-BA-e-1321 19

7.1 Automatic adjustment usi ng int e rnal weight (AEJ only)

With the internal adjustment weight, the weighing accuracy can be checked and re­adjusted at any time.

The automatic adjustment function is always enabled. You can start adjustment at
any time by pressing the F-key 3 times.

Temperature / time controlled adjustment is taking place:

Automatic adjustment will be indicated 5 minutes in advance by “°C” (change of
temperature ∆t 0.8°C) or the “►”symbol on the display (after a period of 3 hours has
passed or a defined time interval).

The user must complete his/her weighing process within this time.
After 5 minutes [ CAL 30 ] appears on the display.

This starts a “count down” of 30 seconds [ CAL 30 ] → [ CAL 0 ]. You may cancel
adjustment during these 30 seconds by pressing the TARE-key. This makes the
balance return to weighing mode in order to e. g. complete an unfinished
measurement.

After a further 5 minutes the automatic adjustment will restart and [ CAL 30 ]
appears.
You may interrupt the adjustment process several times. However, keep in mind that
an interruption of the adjustment may lead to incorrect weighing results.

20 AEJ_N/AES_N-BA-e-1321

Automatic adjustment is carried out:

• When balance was disconnected from the mains.

• When the temperature is changing

The moment a change in temperature of 0.8°C is detected by the temperature
sensor, the weighing scale will carry out a fully automatic adjustment. The °C
symbol indicates the pending adjustment.

• at the end of a time interval
After the time interval (selectable from 1-12 hours) set in the menu (P1.5 CALt)

has passed, the weighing scale will indicate the pending adjustment by displaying
(indicator ►):

In weighing scales with type approval certificate

• menu item P1.5 CALt is locked.

• Adjustment takes place every 3 hours

AEJ_N/AES_N-BA-e-1321 21

7.2 Menu settings

Menu item “P1 CAL“ [adjustment]

AEJ AES

P1.1 iCAL Internal adjustment AEJ only
P1.2 ECAL P1.1 ECAL External adjustment *
P1.3 tCAL P1.2 tCAL Adjustment test
P1.4 ACAL Automatic adjustment AEJ * only
P1.5 CALt

Time controlled automatic adjustment AEJ *

only

P1.6 CALr P1.3 CALr Printout adjustment log

* = Locked in weighing scales with type approval certificate [Er 9 lock].

7.2.1 P1.1 iCAL

 For automatic internal adjustment see chap. 7.1
 Starting interna l adjustment manually

 Press F-key three times

• Ensure that there are no objects on the weighing pan.

• You can cancel adjusting by pressing the TARE-key.

• After successful adjustment the balance automatically returns

to weighing mode.

22 AEJ_N/AES_N-BA-e-1321

7.2.2 P1.2 ECAL - External adjustment (AES models)

Carry out adjustment with the help of the recommended adjustment weight (see
chapter 1 “Technical Specifications”).
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabiliz at ion.

• Return to weighing mode, see chap. 8.2.

• This function is locked in weighing scales with type approval certificate.

Ensure that there are no objects on the

weighing pan. Press PRINT-key, CAL
will be shown.
Wait until the weighed value for the
required adjustment weight appears.
Place the required calibration weight
carefully in the centre of the weighing
plate and press the PRINT key.
The display is showing CAL and
adjustment is starting.
Adjustment will be complete when the
display is showing UNLOAD; remove
the adjustment weight. After successful
adjustment the balance automatically
returns to weighing mode.

AEJ_N/AES_N-BA-e-1321 23

7.2.3 P1.3 tCAL – adjustment test

 AEJ models

This function is applied to compare the internal adjustment weight with the
saved value. The test is carried out automatically. The result is shown on the
display and, if an optional printer is connected, a printout will be issued via the
RS 232 interface.

+ Return to weighing mode, see chap. 8.2.

d

24 AEJ_N/AES_N-BA-e-1321

 AES models

Here, deviation from the last adjustm ent is determined. This is only a check, i.e. no
values are changed.

+ Return to weighing mode, see chap. 8.2.

AEJ_N/AES_N-BA-e-1321 25

7.2.4 P 1 . 4 ACAL – Start criteria of the automatic internal adjustment

(AEJ only)

This function is applied to defin e the criteria required for s tarting up automatic adjustment.

Settings:

nonE Automatic adjus tm ent disabled
tEmp Start automatic Adjustment after change in temperature
timE The start of ti me controlled automatic adjustment depends on t he set ti ng

“P1.5 CALt”

both Start automatic Adjustment is temperature and time dependent

+ Return to weighing mode, see chap. 8.2.

This function is locked in weighing scales with type approval
certificate.

26 AEJ_N/AES_N-BA-e-1321

7.2.5 P1.5 CALt– time controlled automatic adjustment (AEJ only)

This function is applied to define the time interval (selectable from 1-12 hours) for
automatic adjustment.

+ Return to weighing mode, see chap. 8.2.

This function is locked in weighing scales with type approval
certificate.