KERN & SOHN ALT 250-4B User Manual

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KERN & Sohn GmbH

Ziegelei 1 D-72336 Balingen E-Mail: info@kern-sohn.com

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

Operating instructions Analytical and precision balances

KERN ALT_B-PLT_A-PLT_F

Version 3.3

08/2013 GB

ALT_B-PLT_A-PLT-F-BA-e-1333

KERN ALT_B-PLT_A-PLT_F

Version 3.3 08/2013

Operating instructions Electronic analytical and precision balances

Contents

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

2 Appliance overview ....................................................................................... 9

2.1 Operating side .......................................................................................................................... 9

2.1.1 Back and bottom side ............................................................................................................... 11

2.2 Keyboard overview ................................................................................................................. 12

2.2.1 Navigation buttons / numeric input ........................................................................................... 13

2.3 Overview of display ................................................................................................................ 14

3 Basic instructions ........................................................................................ 16

3.1 Proper use ............................................................................................................................... 16

3.2 Improper Use........................................................................................................................... 16

3.3 Warranty .................................................................................................................................. 16

3.4 Monitoring of Test Resources ............................................................................................... 16

4 Basic Safety Precautions ............................................................................ 17

4.1 Pay attention to the instructions in the Operation Manual ................................................ 17

4.2 Personnel training .................................................................................................................. 17

5 Transport and storage ................................................................................. 17

5.1 Testing upon acceptance ...................................................................................................... 17

5.2 Packaging / return transport ................................................................................................. 17

6 Unpacking, Setup and Commissioning ..................................................... 19

6.1 Installation Site, Location of Use .......................................................................................... 19

6.2 Unpacking, Scope of delivery ............................................................................................... 20

6.3 Placing ..................................................................................................................................... 20

6.4 Connect and switch-on power supply .................................................................................. 22

6.5 Connection of peripheral devices ......................................................................................... 22

6.6 Initial Commissioning ............................................................................................................ 22

7 Adjustment (all models excepted PLT-M) .................................................. 23

7.1 Adjustment with internal weight after pressing the CAL button ....................................... 25

7.2 Automatic adjustment with internal weight (factory setting) ............................................. 25

7.3 Adjustment with external adjustment weight ...................................................................... 26

7.4 Overwrite internal adjustment weight .................................................................................. 27

8 Adjustment of models PLT-M ..................................................................... 28

8.1 Automatic adjustment with internal weight ......................................................................... 29

9 Verification ................................................................................................... 30

10 Basic Operation ........................................................................................... 31

10.1 Switch on off balance ............................................................................................................. 31

10.2 Zeroing..................................................................................................................................... 31

10.3 Simple weighing ..................................................................................................................... 32

10.4 Capacity display ..................................................................................................................... 32

10.5 Weighing with tare .................................................................................................................. 33

10.5.1 Determination of the tare weight by weighing....................................................................... 33

10.6 Underfloor weighing ............................................................................................................... 34

2 ALT_B-PLT_A-PLT_F-BA-e-1333

11 Setup menu .................................................................................................. 35

11.1 Weighing Units ....................................................................................................................... 40

11.2 RS232 ....................................................................................................................................... 41

11.3 Baud rate ................................................................................................................................. 42

11.4 Auto Zero ................................................................................................................................. 43

11.5 Filter ......................................................................................................................................... 44

11.6 Stability .................................................................................................................................... 45

11.7 Setting the contrast of the display ........................................................................................ 46

11.8 Display background illumination .......................................................................................... 47

11.9 Automatic switch-off function „AUTO OFF“ ........................................................................ 48

11.10 Setting date and time ............................................................................................................. 49

11.11 Language operator guide ...................................................................................................... 50

11.12 Adjustment mode ................................................................................................................... 51

11.13 Adjustment log ........................................................................................................................ 52

12 Main Menu .................................................................................................... 53

12.1 Parts counting ........................................................................................................................ 54

12.1.1 Determine reference by weighing ......................................................................................... 54

12.1.2 Numeric entry of the reference weight ................................................................................. 58

12.1.3 Automatic reference optimization ......................................................................................... 59

12.2 Density determination (Hydrostatic weighing) .................................................................... 60

12.2.1 Density determination of solids ............................................................................................ 60

12.2.2 Determining density of liquids .............................................................................................. 64

12.3 Formula mode ......................................................................................................................... 67

12.3.1 Formulation without using the recipe data base ................................................................... 67

12.3.2 Formulation using the recipe data base ............................................................................... 69

12.4 Check weighing ...................................................................................................................... 79

12.5 Percent determination ............................................................................................................ 82

12.5.1 Entering the reference weight by weighing ........................................................................... 82

12.5.2 Numeric entering of the reference weight ............................................................................ 83

12.6 Animal weighing function ...................................................................................................... 84

12.7 Peak value function ................................................................................................................ 85

12.8 GLP function (Good laboratory practice) ............................................................................. 86

13 Data output RS 232C ................................................................................... 88

13.1 Technical data ......................................................................................................................... 88

13.2 Pin allocation of balance output plug .................................................................................. 88

13.3 Interface ................................................................................................................................... 89

13.4 Format Data transfer .............................................................................................................. 90

14 Error messages ............................................................................................ 91

15 Service, maintenance, disposal .................................................................. 92

15.1 Clean ........................................................................................................................................ 92

15.2 Service, maintenance ............................................................................................................. 92

15.3 Disposal ................................................................................................................................... 92

15.4 Instant help ............................................................................................................................. 93

16 Declaration of conformity ........................................................................... 94

ALT_B-PLT_A-PLT_F-BA-e-1333 3

1 Technical data

KERN

ALT

160-4B

ALT

250-4B

ALT

220-5DA

ALT

310-4B

Weighing range (max)

160 g

250 g

60 g; 220 g

310 g

Readability (d)

0.1 mg

0.00001 g;

0.0001 g

0.1 mg

Reproducibility

0.1 mg

0.0001 g

0.2 mg

Linearity

± 0.3 mg

0.0003 g

± 0.3 mg

Stabilization time (typical)

4 s

Minimum unit weight at piece counting

> 0.5 mg

> 0,5 mg

Warm-up time

8 hours

Adjustment weight

internal

Reference quantities at piece counting

10, 25, 50, 100, freely selectable

Weighing Units

ct, dwt, g, gn, lb, mo, oz, ozt,

tl (HK), tl (Singap. Malays), tl (Tw)

Secondary voltage powerpack

24 V AC, 500mA

Operating temperature

+ 5° C …. + 35° C

Humidity of air

max. 80 % (not condensing)

Housing (B x D x H) mm

210 x 340 x 330

Dimensions of windshield (B x D x H) mm

160 x 140 x 205 (inside)

190 x 195 x 225 (outside)

Weighing pan (stainless steel)

Ø 80 mm

Weight kg (net)

5.7 kg

6.5 kg

Interface

RS 232C

4 ALT_B-PLT_A-PLT_F-BA-e-1333

KERN

ALT 160-4BM

ALT 250-4BM

Weighing range (max)

160 g

250 g

Readability (d)

0.1 mg

Reproducibility

0.1 mg

Linearity

± 0.3 mg

Verification value (e)

1 mg

Verification class

Minimum load (Min)

10 mg

Stabilization time (typical)

4 s

Minimum unit weight at piece counting

> 0.5 mg

Warm-up time

8 hours

Adjustment weight

internal

Reference quantities at piece counting

10, 25, 50, 100, freely selectable

Weighing Units

ct, g

Secondary voltage powerpack

24 V AC, 500mA

Operating temperature

+ 5° C …. + 35° C

Humidity of air

max. 80 % (not condensing)

Housing (B x D x H) mm

210 x 340 x 330

Dimensions of windshield (B x D x H) mm

160 x 140 x 205 (inside)

190 x 195 x 225 (outside)

Weighing pan (stainless steel)

Ø 80 mm

Weight kg (net)

5.7 kg

Interface

RS 232C

ALT_B-PLT_A-PLT_F-BA-e-1333 5

KERN

PLT 720-3A

PLT 1200-3A

PLT 6200-2A

Weighing range (max)

720 g

1200 g

6200 g

Readability (d)

1 mg

10 mg

Reproducibility

1 mg

10 mg

Linearity

± 2 mg

± 30 mg

Stabilization time (typical)

2 s

Minimum unit weight at piece counting

> 5 mg

> 50 mg

Warm-up time

4 hours

8 hours

4 hours

Adjustment weight

internal

Reference quantities at piece counting

10, 25, 50, 100, freely selectable

Weighing Units

ct, dwt, g, gn, lb, mo, oz, ozt,

tl (HK), tl (Singap. Malays), tl (Tw)

Input Voltage

220 - 240V AC 50 Hz

Secondary voltage powerpack

24 V AC, 500mA

Operating temperature

+ 5° C / + 35° C

Humidity of air

max. 80 % (not condensing)

Housing (B x D x H) mm

210 x 340 x 160

210 x 340 x 100

Dimensions of windshield

Ø 150, 60 high (inside)

Ø 160, 70 high (outside)

Weighing pan (stainless steel)

Ø 11 cm

Ø 16 cm

Weight kg (net)

4.5 kg

Interface

RS 232C

Underfloor weighing device

Eyelet

6 ALT_B-PLT_A-PLT_F-BA-e-1333

KERN

PLT 420-3F

PLT 4200-2F

Weighing range (max)

420 g

4200 g

Readability (d)

1 mg

10 mg

Reproducibility

1 mg

10 mg

Linearity

± 4 mg

± 40 mg

Stabilization time (typical)

2 s

Minimum unit weight at piece counting

> 5 mg

> 50 mg

Warm-up time

4 hours

Adjustment weight

internal

Reference quantities at piece counting

10, 25, 50, 100, freely selectable

Weighing Units

ct, g, gn, lb, mo, oz, ozt,

tl (HK), tl (Singap. Malays), tl (Tw), tol

Input Voltage

220 - 240V AC 50 Hz

Secondary voltage powerpack

9 V 1000 mA, DC

Operating temperature

+ 5° C / + 35° C

Humidity of air

max. 80 % (not condensing)

Housing (B x D x H) mm

210 x 340 x 160

Dimensions of windshield

Ø 150, 60 high (inside)

Ø 160, 70 high (outside)

Weighing pan (stainless steel)

Ø 11 cm

Ø 16 cm

Weight kg (net)

4 kg

Interface

RS 232C

Underfloor weighing device

ALT_B-PLT_A-PLT_F-BA-e-1333 7

KERN

PLT 720-3AM

PLT 6200-2AM

Weighing range (max)

720 g

6200 g

Readability (d)

1 mg

10 mg

Reproducibility

1 mg

10 mg

Linearity

2 mg

30 mg

Verification value (e)

0,01 g

0,1 g

Verification class

Minimum load (Min)

20 mg

50 mg

Stabilization time (typical)

2 s

Minimum unit weight at piece counting

> 5 mg

> 50 mg

Warm-up time

4 hours

Adjustment weight

internal

Reference quantities at piece counting

10, 25, 50, 100, freely selectable

Weighing Units

ct, g

Input Voltage

220 - 240V AC 50 Hz

Secondary voltage powerpack

24 V DC, 500 mA,

Operating temperature

+ 5° C / + 35° C

Humidity of air

max. 80 % (not condensing)

Housing (B x D x H) mm

210 x 340 x 160

210 x 340 x 100

Dimensions of windshield

Ø 150, 60 high (inside)

Ø 160, 70 high (outside)

Weighing pan (stainless steel)

Ø 11 cm

Ø 16 cm

Weight kg (net)

4.5 kg

Interface

RS 232C

Underfloor weighing device

Eyelet

8 ALT_B-PLT_A-PLT_F-BA-e-1333

2 Appliance overview

Models ALT

Models PLT, d = 1 mg

2.1 Operating side

ALT_B-PLT_A-PLT_F-BA-e-1333 9

Models PLT, d = 10 mg



Windshield



Levelling screw



Weighing pan



Bubble level



Display



Cover windshield



Keyboard

10 ALT_B-PLT_A-PLT_F-BA-e-1333

2.1.1 Back and bottom side

1. Weighing pan

2. RS232C-interface

3. Footscrews

4. Mains adapter connection

5. Casing screws (in models with four feet first screw out both rear feet)

6. Underfloor weighing device (remove cover)

ALT_B-PLT_A-PLT_F-BA-e-1333 11

2.2 Keyboard overview

Key

Description

MENU button

Invoke main menu How to select menu items

Press until the acoustic signal gets mute

Invoke setup menu Exit setup menu

ON/OFF

button

Turn on/off Exit main menu

CAL-key

Adjustment How to select menu items

PRINT button

Calculate weighing data via interface Confirm / store settings

TARE button

Taring Zeroing

12 ALT_B-PLT_A-PLT_F-BA-e-1333

2.2.1 Navigation buttons / numeric input

Key

Description

Function

Navigation button 

Increase digit Scroll forward in menu

Set decimal place

Navigation button 

Reduce digit Scroll backwards in menu

Change capital/small letters Press MENU button until the acoustic signal gets mute

Navigation button 

Position digit

Delete input

Navigation button

Store

ESC

cancel

ALT_B-PLT_A-PLT_F-BA-e-1333 13

2.3 Overview of display

Capacity display

Stability display

Zero indicator

Numerical display/menu

Unit

Current time

Current date

Display

Description

see chap.

Stability display

+ Chap. 10.3

Zero indicator

+ Chap. 10.2

Balance is in percent determination mode

+ Chap. 12.5

Balance is in parts counting mode

+ Chap. 12.1

Upper limit

+ Chap.12.4.

Lower limit

The balance is in density determination mode

+ Chap. 12.2

Weighing unit Gram

 Chap. 11.1

Weighing unit Carat

Weighing unit Ounce

Weighing unit Pound

Dwt

Weighing unit Pennyweights

Ozt

Weighing unit Troy ounce

Weighing unit Grain

tl 1

Weighing unit Hongkong Tael

tl 2

Weighing unit Singapore Tael

tl 3

Weighing unit Taiwan Tael

Weighing unit Momme

14 ALT_B-PLT_A-PLT_F-BA-e-1333

Operator guidance:

Active application

Current date

Current time

Operation step to be carried out

In a selected application you are guided step-by-step through that application. Selectable languages (D, GB, F, IT. ESP, P; see chap. 11.11).

Display example „Piece counting“

ALT_B-PLT_A-PLT_F-BA-e-1333 15

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 weighings. In the event that small quantities are removed or added to the material to be weighed, incorrect weighing results can be displayed due to the “stability compensation“. (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 (max) of the balance, minus a possibly existing tare load, must be strictly avoided. Balance may be damage by this. Never operate balance in explosive environment. The serial version is not explosion protected. The structure of the balance may not be modified. This may lead to incorrect weighing results, safety-related faults and destruction of the balance. The balance may only be used according to the described conditions. Other areas of use must be released by KERN in writing.

3.3 Warranty

Warranty claims shall be voided in case

1. Our conditions in the operation manual are ignored

2. The appliance is used outside the described uses

3. The appliance is modified or opened

4. Mechanical damage or damage by media, liquids, natural wear and tear

5. The appliance is improperly set up or incorrectly electrically connected

6. 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.

16 ALT_B-PLT_A-PLT_F-BA-e-1333

4 Basic Safety Precautions

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.

 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.

4.1 Pay attention to the instructions in the Operation Manual

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

ALT_B-PLT_A-PLT_F-BA-e-1333 17

18 ALT_B-PLT_A-PLT_F-BA-e-1333

6 Unpacking, Setup and Commissioning

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.

On the installation site observe the following:

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 (condensation of air humidity on the appliance) may occur if a cold appliance is taken to a considerably warmer environment. In this case, acclimatize the disconnected appliance for ca. 2 hours at room temperature.

Avoid static charge of goods to be weighed and 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.

ALT_B-PLT_A-PLT_F-BA-e-1333 19

6.2 Unpacking, Scope of delivery

Balance, see chap. 2 Mains adapter Protective cover Operating instructions Transport Securing

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.

Scope of delivery / serial accessories:

6.3 Placing

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

 Remove transportation lock On the left lower side of the balance replace the golden-coloured screw with the

silver-coloured one (see label).

20 ALT_B-PLT_A-PLT_F-BA-e-1333

 Install weighing pan as per illustration

Models ALT Models PLT, d = 1 mg

Models PLT, d = 10 mg

ALT_B-PLT_A-PLT_F-BA-e-1333 21

 Levelling balance

 Level balance with foot screws until the air bubble of the

water balance is in the prescribed circle.

 Check levelling regularly.

6.4 Connect and switch-on power supply

Before connecting the mains adapter check if the printed voltage value is the same as the local supply voltage. Only use KERN original mains adapter. Using other makes requires consent by KERN.

 Supply power to balance via mains adapter.  The balance will carry out a self-test Then the balance is set into stand-by

mode, „OFF“ is displayed.

 To switch on press the ON/OFF button. During the display „CAL“ adjustment

is automatically carried out with the internal adjustment weight (see chap.

7.2). As soon as the weight display appears, the balance is ready for weighing.

 To switch off, press the ON/OFF button again. The balance returns into

stand-by mode.

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.

22 ALT_B-PLT_A-PLT_F-BA-e-1333

7 Adjustment (all models excepted PLT-M)

Internal adjustm.

Adjustment with internal weight after pressing CAL

External adjustm.

Adjustment with external weight

Technical adjustm.

Overwrite internal adjustment weight

Autom. adjustm.

Automatic adjustment with internal weight.

As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory). This adjustment process must be carried out 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 balance periodically in weighing operation.

Observe stable environmental conditions. A warming up time (see chapter 1) is required for stabilization.

Ensure that there are no objects on the weighing pan. Issue of an adjustment log, see chap. 11.13

The balances have been set to „Automatic adjustment“ (see chap. 7.2) by factory. If necessary, in the menu the following possibilities of adjustment can be activated.

ALT_B-PLT_A-PLT_F-BA-e-1333 23

Setting adjustment mode:

 In weighing mode press the MENU button and keep it pressed until the

acoustic signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Adjustment mode“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Display

Description

Procedure see chap.

Internal adjustm.

Adjustment with internal adjustment weight

 Chap. 7.1

External adjustm.

Adjustment with external adjustment weight

 Chap. 7.3

Technical adjustm.

Overwrite internal adjustment weight

 Chap. 7.4

Autom. adjustm.

Automatic adjustment with internal adjustment weight

 Chap. 7.2

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

24 ALT_B-PLT_A-PLT_F-BA-e-1333

7.1 Adjustment with internal weight after pressing the CAL button

Condition: Menu setting „Internal adjustm.“, see chap. 7

Condition: Menu setting „Autom. adjustm.“, see chap. 7

 In weighing mode press the CAL button, adjustment will take place

automatically.



 After successful adjustment the balance automatically returns to weighing

mode.

 In case of an adjustment error (e.g. objects on the weighing pan) the

display will show an error message „CAL bUt“, repeat adjustment using the CAL button.

7.2 Automatic adjustment with internal weight (factory setting)

The automatic adjustment with internal weight (see chap. 7.1) is started automatically, if the balance

after the weighing balance was disconnected from the mains after pressing ON/OFF in stand-by mode after a temperature change of 1.5 °C with non loaded weighing pan / zero

display

after a time interval of 20 min

with non loaded weighing pan / zero display

The automatic adjustment function is always enabled. However you can make a manual adjustment at any time with the internal or an external weight, see chap. 7.1 or chap. 7.3.

ALT_B-PLT_A-PLT_F-BA-e-1333 25

7.3 Adjustment with external adjustment weight

 Condition: Menu setting „External adjustm.“, see chap. 7  At the models with internal adjustment weight the adjustment with

external weight is not recommended.

 Information about test weights you will find in the internet under

http://www.kern-sohn.com

 Ensure that there are no objects on the weighing pan. In weighing mode press

the CAL button.



 Wait until the weighed value for the required adjustment weight appears

flashing.

 During the flashing display put the required adjustment weight carefully in the

center of the weighing pan. The flashing display disappears.

 After successful adjustment the balance automatically returns to weighing

mode.

 Take away adjustment weight

26 ALT_B-PLT_A-PLT_F-BA-e-1333

7.4 Overwrite internal adjustment weight

 Overwriting is restricted to specialist staff possessing well acquainted with

the workings of weighing scales.

 Information about test weights you will find in the internet under

http://www.kern-sohn.com

 Call up menu item „Techn. adjustment“, see chap. 7.  To confirm press the PRINT button and keep it pressed until the acoustic signal

gets mute.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

 Ensure that there are no objects on the weighing pan. Press the CAL key



 Wait until the weighing value of the adjustment weight appears flashing.

 During the flashing display put the required adjustment weight carefully in the

center of the weighing pan. The flashing display disappears.

 Wait for stability display, remove adjustment weight.

 Keep the PRINT button pressed until the acoustic signal gets mute. The internal

adjustment weight is overwritten.

 After successful overwriting, the balance automatically returns to weighing

mode.

ALT_B-PLT_A-PLT_F-BA-e-1333 27

8 Adjustment of models PLT-M

 Observe stable environmental conditions. A warming up time (see chapter 1) is

required for stabilization.

 Ensure that there are no objects on the weighing pan.  Issue of an adjustment log, see chap. 11.13

28 ALT_B-PLT_A-PLT_F-BA-e-1333

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Adjustment mode“.

 Confirm by the PRINT button, „Autom. Just.“ will be displayed.

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

8.1 Automatic adjustment with internal weight

The automatic adjustment with internal weight is started automatically, if the balance

after the weighing balance was disconnected from the mains after pressing ON/OFF in stand-by mode after a temperature change of 1.5 °C

with non loaded weighing pan / zero display

after a time interval of 20 min with non loaded weighing pan / zero

display

The automatic adjustment function is always enabled. At any time, however, you can carry out a manual adjustment (press CAL-button) using the internal adjustment weight, see chap. 7.1.

Or selecting the adjustment mode in the menu:

ALT_B-PLT_A-PLT_F-BA-e-1333 29

Balances with obligation to verify must be taken out of operation if:

 The weighing result of the balance is outside the error limit. Therefore, in

regular intervals load balance with known test weight (ca. 1/3 of the max. load) and compare with displayed value.

 The reverification deadline has been exceeded.

Position of the seal mark (models PLT)

9 Verification

General introduction:

According to EU directive 90/384/EEC balances must be officially verified if they are used as follows (legally controlled area):

a) For commercial transactions if the price of goods is determined by weighing. b) For the production of medicines in pharmacies as well as for analyses in the medical

and pharmaceutical laboratory. c) For official purpose. 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! After verification the balance is sealed at the indicated positions.

Verification of the balance is invalid without the "seal".

30 ALT_B-PLT_A-PLT_F-BA-e-1333

 In stand-by mode (see chap. 6.4) press ON/OFF

button. As soon as the weight display appears, the balance is ready for weighing.

Switching off:

 Press ON/OFF. The balance changes into standby

mode, that means that the balance is now in state ready-for-operation..

 To switch-off the balance completely, separate

balance from power supply.

10 Basic Operation

10.1 Switch on off balance

Start-up:

10.2 Zeroing

 Unload the balance  Press the TARE key. The zero display and the indicator [-0-] will appear.

ALT_B-PLT_A-PLT_F-BA-e-1333 31

10.3 Simple weighing

In order to obtain exact weighing results, your balance must have reached the operating temperature (see warming up time chap. 1).

27-08-11 10:41:17

Current date/time

Weight: 50.5773 g

Measuring Value

The capacity display [] runs from below to above and proceeds according to the loaded weight on the balance. Its full height is reached at maximum load. This is an analogue display of the current allocation of the weighing area.

 Wait for zero display, reset to zero using TARE.  Place goods to be weighed on balance.  Wait until the stability display appears [].  Read weighing result.

When an optional printer is connected, the weighing value can be edited. Printout examples (KERN YKB-01N):

10.4 Capacity display

32 ALT_B-PLT_A-PLT_F-BA-e-1333

10.5 Weighing with tare

When the balance is unloaded the saved taring value is displayed with

negative sign.

To delete the stored tare value, remove load from weighing pan and

press the TARE button. „Tare“ is displayed, wait until the zero display appears.

The taring process can be repeated any number of times. The limit is

reached when the whole weighing range is exhausted.

10.5.1 Determination of the tare weight by weighing

The dead weight of any weighing container may be tared away by pressing a button, so that the following weighing procedures show the net weight of the goods to be weighed.

 Put weighing container on the weighing pan.  Wait until stability display [] appears and then press the TARE-button;

„Tare“ is displayed.

 After standstill control the zero display appears.

The weight of the container is now internally saved.

 Weigh the material.  Wait until the stability display appears [  ] .  Read net weight.

Note:

ALT_B-PLT_A-PLT_F-BA-e-1333 33

10.6 Underfloor weighing

CAUTION

Always ensure that all suspended objects are stable enough to

hold the desired goods to be weighed safely (danger of breaking).

Never suspend loads that exceed the stated maximum load (max)

(danger of breaking)

Always ensure that there are no persons, animals or objects that

might be damaged underneath the load.

After completing the underfloor weighing the opening on the bottom of the balance must always be closed (dust protection).

Objects unsuitable for placing on the weighing scale due to size or shape may be weighed with the help of the flush-mounted platform. Proceed as follows:

Switch off the balance. Open closing cover (1) at the balance bottom. Suspend hook for underfloor weighing carefully and completely. Place weighing balance over an opening. Attach load to hook and carry out weighing procedure.

34 ALT_B-PLT_A-PLT_F-BA-e-1333

11 Setup menu

Access to menu

2 sec.

In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed.

How to select menu items

Use the navigation buttons  to select the individual menu items one by one. The cursor (►) displays the current setting.

Change settings

Acknowledge selected menu item using PRINT button, the current setting is displayed. Each time the navigation buttons  are pressed the next setting will be displayed.

Save settings

Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to menu mode as follows.

Exit menu/ back to weighing mode

Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode.

In the setup menu, the balance settings can be modified. This way, the balance can be adjusted to individual weighing requirements.

Navigation in the menu:

ALT_B-PLT_A-PLT_F-BA-e-1333 35

Menu overview (all models excepted PLT-M)

Menu item

Selection

Description

Weight units (see chap. 11.1)

Gram

Carat

Ounce

Pound

Dwt

Pennyweights

Ozt

Troy ounce

Grain

tl 1

Hongkong-Teal

tl 2

Singapur-Teal

tl 3

Taiwan-Teal

Momme

Serial output (see chap. 11.2)

Continuous

Continuous output

On demand

Output of stable weighing values after pressing PRINT button

Generic printer

Not documented

Printer Tlp

Not documented

On demand - Glp

GLP conformant printouts after pressing the PRINT button

Generic print. - Glp

Not documented

Printer Tlp - Glp

Not documented

Baud rate (see chap. 11.3)

1200 Baud

Transfer speed

2400 Baud

4800 Baud

9600 Baud

Auto zero Automatic zero point correction (see chap. 11.4)

Auto zero OFF

Auto Zero switched off

Auto zero 1

Auto Zero range ± ½ Digit

Auto zero 2

Auto Zero range ± 3 Digits

Auto zero 3

Auto Zero range ± 7 Digits

Auto zero 3E

Auto Zero range ± 7 digits in the whole weighing range

Filter (see chap. 11.5)

Filter 1

Setting for dispensing

Filter 2

Sensitive and fast, very quiet set-up location.

Filter 3

Robust but slow, busy set-up location.

Stability (see chap. 11.6)

Stability 1

Standstill control fast / very quiet set-up location

Stability 2

Standstill control fast + exact / quiet set-up location

Stability 3

Standstill control exact /very set-up location.

36 ALT_B-PLT_A-PLT_F-BA-e-1333

Contrast adjustment (see chap. 11.7)

1-15

Setting the contrast of the display

Backlight (see chap. 11.8)

Background illumination on

off

Background illumination off

Auto

Backlighting automatically switched off 3 seconds after achieving stable weighing value. Changes in weight or pressing of keys will automatically result in backlight switching on again.

Timer OFF Automatic switch-off function in stand-by mode (see chap. 11.9)

Disable

AUTO-OFF switched off

2 minutes

AUTO-OFF after 2 minutes without changing the weight

5 minutes

AUTO-OFF after 5 minutes without changing the weight

15 minutes

AUTO-OFF after 15 minutes without changing the weight

Time and date (see chap. 11.10

Setting date and time

Language (see chap. 11.11)

English / Deutsch

Language operator guide

Français

Español

Português

English

Italiano

Calibration mode (see chap. 11.12)

External calibration

Adjustment with external weight

Auto calibration

Automatic adjustment with internal weight

Internal calibration

Adjustment with internal weight after pressing CAL

Technical calib.

Overwriting the internal adjustment weight

Calibration info (see chap. 11.13)

Record output of the last adjustment

Return

Back to weighing mode

ALT_B-PLT_A-PLT_F-BA-e-1333 37

Menu item

Selection

Description

Units (see chap. 11.1)

Gram

Carat

RS 232 (see chap.11.2)

Continuous

Continuous output

PRINT button

Output of stable weighing values after pressing PRINT key

Not documented

PRINT button + GLP

GLP conformant printouts after pressing the PRINT button

Not documented

Baud rate (see chap. 11.3)

1200 Baud

Transfer speed

2400 Baud

4800 Baud

9600 Baud

Auto zero Automatic zero point correction (see chap. 11.4)

Auto zero OFF

Auto Zero switched off

Auto zero 1

Auto Zero range ± ½ Digit

Filter (see chap. 11.5)

Filter 1

Setting for dosage

Filter 2

Sensitive and fast, very quiet set-up location.

Filter 3

Robust but slow, busy set-up location.

Stability (see chapter 9.6).

Stability 1

Standstill control fast / very quiet set-up location

Stability 2

Standstill control fast + exact / quiet set-up location

Stability 3

Standstill control exact /very busy set-up location.

Menu overview models PLT-M:

38 ALT_B-PLT_A-PLT_F-BA-e-1333

Display contrast (see chap.11.7)

1-15

Select contrast

Background illumination of the display (see chap. 11.8)

Background illumination on

off

Background illumination off

Auto

Background illumination automatically switched off 3 seconds after achieving stable weighing value. Changes in weight or pressing of keys will automatically result in background illumination switching on again.

AUTO-OFF Automatic switch-off function in stand-by mode (see chap. 11.9)

Disabled

AUTO-OFF switched off

2 min

AUTO-OFF after 2 minutes without changing the weight

5 min

AUTO-OFF after 5 minutes without changing the weight

15 min

AUTO-OFF after 15 minutes without changing the weight

Time and date (see chap 11.10)

Setting date and time

Language (see chap. 11.11)

Deutsch

Language operator guide

Français

Español

Português

English

Italiano

Adjustment mode (see chap. 11.12)

Autom. adjustm.

Automatic adjustment with internal weight

Adjustment log (see chap.

11.13)

Back to weighing mode

Back

ALT_B-PLT_A-PLT_F-BA-e-1333 39

11.1 Weighing Units

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Weight units“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

! In models PLT-M only gram and carat are available.

Symbol

Weighing unit

Conversion factor 1g =

Gram

Carat

Ounce

0.035273962

Pound

0.0022046226

Dwt

Pennyweights

0.643014931

Ozt

Troy ounce

0.032150747

Grain

15.43235835

tl 1

Hongkong-Teal

0.02671725

tl 2

Singapur-Teal

0.02646063

tl 3

Taiwan-Teal

0.02666666

Momme

0.2667

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

According to the requirements the balance can be switched over into different units. Selected weighing unit will be retained even after disconnection from the mains.

40 ALT_B-PLT_A-PLT_F-BA-e-1333

11.2 RS232

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Serial output“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Display

Description

Continuous

Continuous data output

On demand

Output of stable weighing values after pressing PRINT key

Generic printer

Not documented

Printer Tlp

Not documented

On demand - Glp

GLP conformant printouts after pressing the PRINT button

Generic print. - Glp

Not documented

Printer Tlp - Glp

Not documented

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

ALT_B-PLT_A-PLT_F-BA-e-1333 41

11.3 Baud rate

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Baud rate“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Selectable 1200, 2400, 4800, 9600 baud.

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

42 ALT_B-PLT_A-PLT_F-BA-e-1333

11.4 Auto Zero

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Auto Zero“.

 Acknowledge using PRINT button, the current setting is displayed.  Use the navigation buttons  to select the desired setting.

! In models PLT-M only „Auto Zero Off“ and „Auto Zero 1“ are available. Display

Description

Auto Zero off

Auto Zero switched off

Auto Zero 1

Auto Zero range ± ½ Digit

Auto Zero 2

Auto Zero range ± 3 Digits

Auto Zero 3

Auto Zero range ± 7 Digits

Auto Zero 3E

Auto Zero range ± 7 digits in the whole weighing range

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

Under this menu item the automatic zero point correction can be switched on or off. In switched-on-state the zero point is automatically corrected at drift or when dirty. Note: 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“. (e.g. slow flow of liquids from a container placed on the balance,

evaporating processes). When apportioning involves small variations of weight, it is advisable to switch off this function.

ALT_B-PLT_A-PLT_F-BA-e-1333 43

11.5 Filter

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Filter“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Display

Description

Filter 1

Setting for dispensing

Filter 2

The balance reacts quickly and in a sensitive manner, quiet set-up location.

Filter 3

The balance reacts slowly and in a robust manner, busy set-up location

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

This menu item allows the balance to be set according to specific ambient conditions and measuring purposes.

44 ALT_B-PLT_A-PLT_F-BA-e-1333

11.6 Stability

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Stability“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Display

Description

Stability 1

Standstill control fast - very quiet set-up location

Stability 2

Standstill control fast + exact – quiet set-up location

Stability 3

Standstill control exact / set-up location.

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

ALT_B-PLT_A-PLT_F-BA-e-1333 45

11.7 Setting the contrast of the display

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Contrast adjustment“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Display

Description

small contrast



high contrast

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

To set the contrast of the display you can choose between 15 values.

46 ALT_B-PLT_A-PLT_F-BA-e-1333

11.8 Display background illumination

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Backlight“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Display

Description

Auto

Backlighting automatically switched off 3 seconds after achieving stable weighing value. Changes in weight or pressing of keys will automatically result in backlight switching on again

Background illumination on

off

Background illumination on

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

ALT_B-PLT_A-PLT_F-BA-e-1333 47

11.9 Automatic switch-off function „AUTO OFF“

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Timer off“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Display

Description

Disabled

AUTO-OFF switched off

2 minutes

AUTO-OFF after 2 minutes without changing the weight

5 minutes

AUTO-OFF after 5 minutes without changing the weight

15 minutes

AUTO-OFF after 15 minutes without changing the weight

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

48 ALT_B-PLT_A-PLT_F-BA-e-1333

11.10 Setting date and time

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Time and date“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use navigation buttons  to select the required format.

DD-MM: day / month MM-DD: month / day

 Acknowledge the format with the PRINT button and set date and time as follows.

 The active digit e.g. 25 is shown underlined.

Use the navigation buttons  to set the day and confirm using the PRINT button.

 The active digit wanders to the month, (is shown underlined). Use the navigation

buttons  to set the month and confirm using the PRINT button.

 Set year, hours, minutes and seconds in the same way.

 After finishing the input, press the PRINT button and keep it pressed until the

acoustic signal gets mute. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode. The set date and time are displayed.

ALT_B-PLT_A-PLT_F-BA-e-1333 49

11.11 Language operator guide

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Language“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

Language

Deutsch

Français

Español

Português

English

Italiano

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

50 ALT_B-PLT_A-PLT_F-BA-e-1333

11.12 Adjustment mode

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Calibration mode“.

 Acknowledge using PRINT button, the current setting is displayed.

 Use the navigation buttons  to select the desired setting.

! In models PLT-M only automatic adjustment is available.

Display

Description

Procedure see chap.

Internal

adjustm.

Adjustment with internal weight after pressing the CAL button

+ Chap. 7.1

External

adjustm.

Adjustment with external adjustment weight

+ Chap. 7.3

Technical

adjustm.

Overwrite internal adjustment weight

+ Chap. 7.4

Autom. adjustm.

Automatic adjustment with internal adjustment weight

+ Chap. 7.2 + or 8.1 (PLT-M)

 Take over selection using the PRINT button.

Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows.

 Press the MENU button and keep it pressed until the acoustic signal gets mute.

The balance returns automatically into weighing mode.

ALT_B-PLT_A-PLT_F-BA-e-1333 51

11.13 Adjustment log

Make sure that the communication parameter of balance and printer are the same. Communication parameters, see chap. 9.2 and 11.3

 In weighing mode press the MENU button and keep it pressed until the acoustic

signal gets mute. The setup menu is displayed.

 Use the navigation buttons  to select the menu item „Calibration info“.

 Confirm with PRINT button; date, time, adjustment type and deviation of the last

adjustment are displayed.

 If you connect an optional printer you can also print these data by pressing the

PRINT key.

Printout example (KERN YKB-01N):

27-08-11 10:41:17

Current date/time

Calibration:

27-08-11 10:11:17

Date/time of the last adjustment

Internal calib.

Type of adjustment

Corr. : 0.21 g

Deviation from last adjustment

 Press the ON/OFF key. Weighing balance returns to menu. Either make more

adjustments in the menu if required or press ON/OFF button anew; the balance will return into weighing mode.

This function helps to print out a record of the last adjustment.

52 ALT_B-PLT_A-PLT_F-BA-e-1333

12 Main Menu

Navigation in the menu:

Access to menu

In weighing mode press MENU button. The master menu will be displayed.

How to select menu items

Use the navigation buttons  to select the individual menu items one by one. The cursor (►) displays the current setting.

Change settings

Acknowledge selected menu item using PRINT button, the current setting is displayed. Each time the navigation buttons

 are pressed the next setting will be displayed.

Save settings

Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to menu mode as follows.

Exit menu/ back to weighing mode

Press the ON/OFF key.

ALT_B-PLT_A-PLT_F-BA-e-1333 53

12.1 Parts counting

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Piece counting“.

 Acknowledge using PRINT button, the currently set reference quantity is

displayed.

 Use the navigation buttons  to select the desired setting.

Display

Description

10 off

Reference piece number 10

25 off

Reference piece number 25

50 off

Reference piece number 50

100 off

Reference piece number 100

Manual

Numerical input of reference weight, see chap. 12.1.2

Before the balance can count parts, it must know the average part weight (i.e. reference). Proceed 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.

12.1.1 Determine reference by weighing

54 ALT_B-PLT_A-PLT_F-BA-e-1333

 If necessary place a weighing container, confirm the set reference piece number

by pressing the PRINT button.



 Place as many pieces to add-up as required by the set reference piece number.  Acknowledge using PRINT button and wait for stability display.

As soon as the weighing result is stable, the determined average piece weight will be taken over as reference weight.

The currently placed weight „W“, the reference weight „MPW“ and the piece number

„PCS“ are displayed.

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

all units on the weighing pan.

ALT_B-PLT_A-PLT_F-BA-e-1333 55

If it was impossible to determine a reference due to instable goods to be weighed or an insufficient reference weight, the following display will appear during reference calculation.

Smallest counting weight not achieved

 Increase the counted weight or select a balance with high resolution

If in the display “Add pieces…..“ appears, the balance asks for a

reference optimisation, as the placed number of pieces was not sufficient for a correct reference calculation.

 Place more parts, but at least the double quantity.

Press the PRINT button, the reference is calculated anew.

The placed quantity is always too small, add more parts (double quantity) and acknowledge using the PRINT button. Repeat the procedure until the piece counter display appears.

Placed quantity sufficient for reference determination. Remove reference weight. The balance is now in parts counting mode counting all units on the weighing pan.

56 ALT_B-PLT_A-PLT_F-BA-e-1333

Carry out parts counting

 After having calculated the reference, place the pieces which will be counted.

The currently placed weight „G“, the reference weight „AUW“ and the calculated

piece number „St.“ are displayed.

 The display value can be printed out by connecting an optional printer.

Printout example (KERN YKB-01N):

27-08-11 10:41:17

Current date/time

PCS

Calculated piece number

Weight:

199,9985 g

Weight placed on balance

MPW:

10 000 g

Reference weight

Return to weighing mode

 Press the ON/OFF key

ALT_B-PLT_A-PLT_F-BA-e-1333 57

12.1.2 Numeric entry of the reference weight

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Piece counting“.

 Acknowledge using PRINT button, the currently set reference quantity is

displayed.

 Use the MENU button to select the „Manual“ setting.

 Confirm by pressing the PRINT button.

 Use the navigation buttons (see chap. 2.2.1) to enter the known reference piece

weight in grams. To set a decimal point press the CAL button long time. The input is deleted by pressing the TARE button a longer time.

 Confirm by pressing the PRINT button.

From here on the balance is in parts counting mode and counts all pieces which are placed on the weighing pan (see chap.10.1.1 „Carry our parts counting“).

If the minimum parts weight is not reached, an error message will appear. Use the

ON/OFF button to return to the weighing mode and restart the procedure.

Return to weighing mode

 Press the ON/OFF key

If the piece weight (reference) is known, it can be entered directly. As the balance in this method needs not to calculate any reference, the balance after confirming the reference piece weight will be directly in parts counting mode.

58 ALT_B-PLT_A-PLT_F-BA-e-1333

12.1.3 Automatic reference optimization

The automatic reference optimisation is not active when the reference weight is entered numerically.

In order to improve the counting exactness, the reference can be optimised by adding more pieces. At every reference optimisation, the reference weight is calculated anew. As the additional pieces increase the base for the calculation, the reference also becomes more exact.

 Leave the piece number on the weighing pan after setting the reference weight  Duplicate the number of pieces on the weighing pan and wait until the acoustic

signal sounds. The reference weight is calculated anew.

 Either repeat the reference optimisation by adding more pieces (max. 255

pieces) or start the counting process.

ALT_B-PLT_A-PLT_F-BA-e-1333 59

12.2 Density determination (Hydrostatic weighing)

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Density“.

 Acknowledge using PRINT button, the current setting is displayed.  Use the navigation buttons  to select setting „Solid body“.

 Confirm using the PRINT button, the set density of the measuring liquid is

displayed (factory setting 1.0000 for dest. water at 20°C).

 Use the navigation buttons (see chap. 2.2.1) to enter the current density of the

measuring liquid. For water see the following density table.

 Confirm with PRINT button, the display for calculation of „Weight in air“ is

displayed.

Density is the relationship of weight [g] : volume [cm3]. The weight is determined by weighing the sample in air. The volume results from the ascending force [g] of the sample dipped in a liquid. The density [g/cm3] of that liquid is known (principle of Archimedes). The density is determined with help of the underfloor weighing device. We recommend to switch off the automatic adjustment in the setup menu, see chap. 11.12.

12.2.1 Density determination of solids

Prepare the balance as follows:

Switch off the balance Remove the weighing pan and carefully turn over the weighing balance. Suspend hook for underfloor weighing (optional) Place weighing balance over an opening Prepare suspension device Fill measuring liquid e.g. water in a vessel e.g. beaker and temper it.

Calculate density:

60 ALT_B-PLT_A-PLT_F-BA-e-1333

 Suspend sample with suspension device at the flush-mounted hook. Wait for

stability display, take over the weight value using PRINT button. The display for determination of the "sample in water“ appears.



 Immerse the sample without bubbles developing.

Make sure that the sample does not touch the beaker.

 Wait for stability display, take over the weight value using PRINT button.

The density of the sample is shown.



ALT_B-PLT_A-PLT_F-BA-e-1333 61

 When an optional printer is connected, the displayed value can be edited using

PRINT.

Printout example (KERN YKB-01N):

07-09-11 11:14:57

d: 8.0700 g/cm3

If at the density determination errors have appeared, „d-----„ is displayed.

1. Back to density determination mode, press MENU button.

2. Back to weighing mode, press ON/OFF button. 62 ALT_B-PLT_A-PLT_F-BA-e-1333

Density table of water:

* the asterisk means that the cipher left from the comma is reduced by 1. Table from "Mass determination" by M. Kochsiek, M. Gläser

ALT_B-PLT_A-PLT_F-BA-e-1333 63

12.2.2 Determining density of liquids

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Density“.

 Acknowledge using PRINT button, the current setting is displayed.  Use the navigation buttons  to select the setting „Liquid“.

 Confirm using the PRINT button, the set density of the sinker is displayed

(factory setting 3.0000 g/cm3).

 Use the navigation buttons (see chap. 2.2.1) to enter the current density of the

sinker.

 Confirm by pressing the PRINT button. The display for weight determination of

the "Sinker in air“ appears.

For density determination of liquids, a sinker with known density is used (optionally available). The sinker is weighed first in air and then in the liquid whose density is to be determined. From the weight difference results the buoyancy from where the software calculates the density.

Preparation:

Fill sample liquid into a vessel, e.g. a pitcher. Heat sample liquid until temperature is constant. Prepare a sinker with known density

Calculate density:

64 ALT_B-PLT_A-PLT_F-BA-e-1333

 Suspend sinker with suspension device at the flush-mounted hook. Wait for

stability display, take over the weight value using PRINT button. The display for weight determination of the "Sinker in sample liquid“ appears.



 Immerse the sample without bubbles developing.

Make sure that the sample does not touch the beaker.

 Wait for stability display, take over the weight value using PRINT button. The

density of the sample is shown.



ALT_B-PLT_A-PLT_F-BA-e-1333 65

If at the density determination errors have appeared, „d-----„ is displayed.

 When an optional printer is connected, the displayed value can be edited using

PRINT.

Printout example (KERN YKB-01N):

07-09-11 11:14:57

d : 0.9984 g/cm

1. Back to density determination mode, press MENU button.

2. Back to weighing mode, press ON/OFF button. 66 ALT_B-PLT_A-PLT_F-BA-e-1333

12.3 Formula mode

Select formula mode „Manual“

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Formulation“.

 Confirm by pressing the PRINT button.

 Confirm by pressing the PRINT button. The display for weighing the first

component appears.

Weighing components

 Tare when using a weighing container Weighing the first component (e.g. 15 g).

 Confirm by pressing the PRINT button. The weight is added to the summation

memory and printed if an optional printer is connected.

The formula function allows weighing of components which are in a certain relation one to the other. For check purpose, the weight of all components, as well as the total weight (TOT) can be printed out. The balance works with a separated memory for the weight of the weighing container and of the formula components.

12.3.1 Formulation without using the recipe data base

ALT_B-PLT_A-PLT_F-BA-e-1333 67

 Weighing the second component (e.g. 5 g).

 Confirm by pressing the PRINT button. The weight is added to the summation

memory and printed if an optional printer is connected.

 If required, weigh more components (max. 99) as described above.

Complete Formulation process  Press the PRINT button and keep it pressed until the acoustic signal gets mute.

The total weight (TOT:) of all components will be displayed and edited on the printer.

Printout example (KERN YKB-01N):

07-09-11 11:14:57

Date/time

Manual

Recipe mode

1. 15.00 g

Weighing 1. component

2. 5.00 g

Weighing 2. component

T = 20.00 g

Total weight

 Back to formula mode, press the ON/OFF button and start the next Formulation.

 Back to weighing mode, press ON/OFF button repeatedly.

68 ALT_B-PLT_A-PLT_F-BA-e-1333

12.3.2 Formulation using the recipe data base

Select formula mode

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Formula“.

 Confirm by pressing the PRINT button.

Define recipe and components

1. Use the navigation buttons  to select the memory space number (e.g. 01) for the

recipe. Press the PRINT button and keep it pressed until the acoustic signal gets mute. The display for entering the recipe name appears.

2. Use the navigation buttons (see chap. 2.2.1 ) to enter the recipe name (max. 20

characters).

12.3.2.1 Store recipes

The balance contains a recipe data base, where maximally 99 recipes each with 20 components can be filed.

ALT_B-PLT_A-PLT_F-BA-e-1333 69

3. Confirm by pressing the PRINT button. The display for entering the first

component name appears.

4. Use the navigation buttons (see chap. 2.2.1) to enter the component name

(max. 11 characters).

5. Confirm by pressing the PRINT button. The display to enter the quantity appears.

6. Use the navigation buttons (see chap. 2.2.1) to enter quantity. 70 ALT_B-PLT_A-PLT_F-BA-e-1333

7. Confirm by pressing the PRINT button. The input of the minus-tolerance is

displayed.

8. Enter the negative tolerance value: ex.: -10 %

9. Confirm by pressing the PRINT button. The input of the plus-tolerance is

displayed.

10. Enter the positive tolerance value: ex.: 5 %

11. Confirm by pressing the PRINT button

12. To enter more components (max. 20) repeat step 3 – 11 respectively.

13. Once having entered all components, use the ON/OFF button to exit the formula

entry mode.

 Back to weighing mode, press ON/OFF button anew.

ALT_B-PLT_A-PLT_F-BA-e-1333 71

12.3.2.2 Invoke and work off the recipes

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Formula“.

 Confirm by pressing the PRINT button.

or (Example)

„Receipt 00“, or the most recently entered recipe will appear

 Use navigation buttons  to select the required recipe.

 Acknowledge using PRINT button, the first component and its nominal value as

well as the negative and the positive tolerance value are displayed. Using the navigation buttons , all components including their nominal value and tolerance values can be displayed.

 Select component and confirm by the PRINT button, the entry of the multiplication

factor will be displayed

After invoking a stored recipe (see chap. 12.3.2.1) the balance will be ready at once for weighing the components. Name and nominal value, tolerance and multiplication factor of the respective component are displayed.

72 ALT_B-PLT_A-PLT_F-BA-e-1333

Tolerance value

Total weight of all components

Nominal value of the component

Total weight of all components

Displaying tolerance

Weighed good below nominal value

Weighed good = nominal value

Weighed good above nominal value

Weighed good below nominal value

Weighed good = nominal value

Weighed good above nominal value

 Use the navigation buttons  to enter the required multiplication factor.

1 = simple receipt quantity 2 = double receipt quantity 3 = triple receipt quantity

etc.

 Use the PRINT button to confirm the selected factor:

Example for factor 1

Overview tolerance display: Ex.: tolerance -10.0 % to +5.0 %

Ex.: without tolerance entry:

ALT_B-PLT_A-PLT_F-BA-e-1333 73

 The display for weighing the first component appears.  Tare when using a weighing container. Start weighing. When the nominal value is

reached, right next to the capacity display „OK“ will appear.

If the nominal value is not reached (-) or exceeded (+), „Err 10“ will appear on the display after pressing the PRINT button. Correct the poured quantity.

 If the nominal weight is reached, press PRINT button. „Wait“ appears shortly

followed by „Tare“. Then the display passes to „W=0“ and the display for weighing

the second component appears.



 Weigh-in the displayed nominal value of the second component.

74 ALT_B-PLT_A-PLT_F-BA-e-1333

Printout example (KERN YKB-01N):

07-09-11 11:14:57

Cake

Name receipt

1. 10.00 g

Weighing 1. component

Salt

Name 1. component

2. 70.00 g

Weighing 2. component

Sugar

Name 2. component

3. 0.50 g

Weighing 3. component

ABC

Name 3. component

T = 80.50 g

Total weight

 Back to formula mode, press the ON/OFF button and start the next recipe.

 Back to weighing mode, press ON/OFF button anew.

 After weighing and confirming the last component, the total weight (TOT:) of all

components will be displayed and printed automatically.

ALT_B-PLT_A-PLT_F-BA-e-1333 75

Example for factor 2:

 Call-up the required recipe as specified above

 Acknowledge using PRINT button, the first component and its nominal value as

well as the negative and the positive tolerance value are displayed. Using the navigation buttons , all components including their nominal value and tolerance values can be displayed.

 Select component and confirm by the PRINT button, the entry of the

multiplication factor will be displayed

 Use the navigation buttons  to enter the multiplication factor „2“.

 Use the PRINT-button to confirm the selected factor:

 Now the double quantity (20.000 g) appears as nominal value.  Start weighing. When the nominal value is reached, right next to the capacity

display „OK“ will appear.

76 ALT_B-PLT_A-PLT_F-BA-e-1333

 If the nominal weight is reached, press PRINT button. „Wait“ appears shortly

followed by „Tare“. Then the display passes to „W=0“ and the display for weighing

the second component appears.



 Now the nominal value is „40000 g“. Start weighing. When the nominal value

is reached, right next to the capacity display „OK“ will appear.

 After weighing and confirming the last component, the total weight (TOT:) of all

components will be displayed and printed automatically.

ALT_B-PLT_A-PLT_F-BA-e-1333 77

 Back to formula mode, press the ON/OFF button and start the next recipe.

 Back to weighing mode, press ON/OFF button anew.

78 ALT_B-PLT_A-PLT_F-BA-e-1333

12.4 Check weighing

Tolerance

marker

Tone

Assessment

Load exceeds specified tolerance

yes

Load within specified tolerance

Load below specified tolerance

Tolerance

marker

Tone

Assessment

yes

Weighed goods > lower limit value

Weighed goods  lower limit value

Tolerance

marker

Tone

Assessment

Weighed goods > upper limit value

yes

Weighed goods  upper limit value

In checkweighing an upper and a lower limit value can be established to ensure that the weighed goods are exactly within the established tolerance limits. The tolerance mark () and an acoustic signal (selectable) show, if the weighed material is within the two tolerance limits.

Display of the results

1. Lower and upper limit value  0

2. Lower limit value > 0 and upper limit value = 0

3. Lower limit value = 0 and upper limit value > 0

ALT_B-PLT_A-PLT_F-BA-e-1333 79

Settings

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Checkweighing“.

 Press PRINT button to confirm, the display for entering the lower limit value will

appear.

 Use the navigation buttons  (see chap.2.2.1) to enter the lower limit value, e.g.

9.00 g.

 Press PRINT button to confirm, the display for entering the upper limit value will

appear.

 Use the navigation buttons  (see chap.2.2.1) to enter the upper limit value, e.g.

11.00 g.

 Confirm using the PRINT button, the display to adjust the signal tone appears.

 Use the MENU-button to select the desired setting

On: Acoustic signal switched on Off: Signal tone switched off

 Confirm by pressing the PRINT button.

From now the balance is in checkweighing mode.

80 ALT_B-PLT_A-PLT_F-BA-e-1333

Start tolerance check

 Tare when using a weighing container  Put on goods to be weighed, tolerance control is started

Load below specified tolerance

Load within specified tolerance

Load exceeds specified tolerance

 When an optional printer is connected, the displayed value can be edited using

PRINT.

Printout examples (KERN YKB-01N):

Load below specified tolerance

Load within specified tolerance

Load exceeds specified tolerance

07-09-11 11:14:57

Lim.1 :

9 000 g

Lim.1 :

9 000 g

Lim.1 :

9 000 g

Lim. 2 :

11 000 g

Lim. 2 :

11 000 g

Lim. 2 :

11 000 g

Weight :

8,900 g

Weight :

10 000 g

Weight :

11,700 g

TEST : KO! ---

TEST : OK

TEST : KO! +++

Return to weighing mode

 Press the ON/OFF key

ALT_B-PLT_A-PLT_F-BA-e-1333 81

12.5 Percent determination

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Percent weigh.“.

 Confirm with the PRINT button, the currently set mode will be displayed.  Use the navigation buttons  to select setting „Automatic“.

 If using a weighing container, put this before pressing the PRINT button. The

taring process is automatically started.

 Press the PRINT key.

 Place the reference weight (=100 %) and press the PRINT button. As soon the

weighing value is stable, the determined weight will be taken over as reference (100%). From now the balance is in percent determining mode.

 Place weighed goods, the result display will appear.

Weight of the sample in percentage

W Weight of the sample in grams

REF:

Reference weight (100%)

When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N):

07-09-11 11:14:57

Perc.

49.95 %

Weight of the sample in percentage

Weight:

9.990 g

Weight of the sample in grams

Refer.:

20.000 g

Reference weight (100%)

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

12.5.1 Entering the reference weight by weighing

82 ALT_B-PLT_A-PLT_F-BA-e-1333

12.5.2 Numeric entering of the reference weight

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Percent determin.“.

 Confirm with the PRINT button, the currently set drying mode will be displayed.  Use the navigation buttons  to select setting „Manual“.

 Confirm by pressing the PRINT button.

 Use the navigation buttons (see chap. 2.2.1) to enter the reference weight

(100 %) in grams.

 Confirm input by pressing the PRINT button.

From now the balance is in percent determining mode.

 Place weighed goods, the result display will appear.

Weight of the sample in percentage

W Weight of the sample in grams

REF:

Reference weight (100%)

When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N):

07-09-11 11:14:57

Perc.

49.95 %

Weight of the sample in percentage

Weight:

9.990 g

Weight of the sample in grams

Refer.:

20.000 g

Reference weight (100%)

Return to weighing mode

 Press the ON/OFF key

ALT_B-PLT_A-PLT_F-BA-e-1333 83

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „Animal weigh.“.

 Confirm with the PRINT button, the currently set measuring time will be displayed.

 Use the navigation buttons  to select the wanted measuring time (5 – 90 s) and

confirm with PRINT button.

 Put upon weighing goods and press the PRINT button. In the display runs a

„Countdown“ of the set measuring time.

 The average value of the weighing results is displayed and remains displayed on

the screen.

When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N):

07-09-11 11:14:57

Time

= 20 sec

Measuring time

20.0052 g

Weighing result

 For other weighing procedures press ON/OFF button 1x Return to weighing mode:  Press the ON/OFF button 2x

12.6 Animal weighing function

The animal weighing function can be applied for busy weighings. During a defined period the mean value of the weighing results is formed. The more unquiet the weighed item, the longer the measuring time should be selected.

84 ALT_B-PLT_A-PLT_F-BA-e-1333

12.7 Peak value function

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select menu item „Maximum load“.

 Confirm using PRINT button, the taring process is automatically started. „Tare“

will be shortly displayed. From now on the balance is in peak value mode.

 Load weighing pan. The maximum load value is displayed.

 The peak value remains in the display until the TARE button is pressed. Then the

balance is ready for further measurements.

When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N):

07-09-11 11:14:57

Max.:

20.0356 g

Peak value

Return to weighing mode:

 Press the ON/OFF key.

This function displays the highest load value (peak value) of a weighing. The peak value remains in the display until it will be deleted.

ALT_B-PLT_A-PLT_F-BA-e-1333 85

12.8 GLP function (Good laboratory practice)

 In weighing mode press MENU button. The master menu will be displayed.  Use the navigation buttons  to select the menu item „GLP.“.

 Confirm by pressing the PRINT button. The display to enter the balance

identification number appears.

 Use the navigation buttons (see chap. 2.2.1) to enter the balance ID (max. 18

characters).

 Confirm by pressing the PRINT button. The display for entering the user ID

appears.

 Use the navigation buttons (see chap. 2.2.1) to enter the user ID (max. 18

characters).

 Confirm by pressing the PRINT button. The display for entering the project ID

appears.

 Use the navigation buttons (see chap. 2.2.1) to enter the project ID (max. 18

characters).

 To save all the information press the PRINT button and keep it pressed until the

acoustic signal gets mute. The balance returns automatically into weighing mode.

In the „GLP“ settings, information is defined, which will be edited in the measurement

records.

86 ALT_B-PLT_A-PLT_F-BA-e-1333

For GLP conformant printouts activate the menu setting „PRINT

button_GLP“, see chap. 11.2

Printout example (KERN YKB-01N):

07-09-11 11:14:57

G.L.P. Parameter

Balance ID:

TEST 1

User ID:

Miller

Project ID:

789 Weight: 199.991 g

Weighing data

Signature:

G.L.P. Parameter

ALT_B-PLT_A-PLT_F-BA-e-1333 87

RS232C

13 Data output RS 232C

Pin 1

Power +5V

Pin 2

Tx Signal

Pin 3

Rx Signal

Pin 4

busy signal

Pin 5

GND

Pin 4-6

Transmission to PC

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

Use a suitable cable to connect the weighing balance to the interface of the

printer/PC.

Faultless operation requires an adequate KERN interface cable (optional). The baud rates of balance and printer must match (see chap.11.3). In the setup menu (see chap.11.2) activate the desired data output, you can

select

- Continuous data output

- Output of stable weighing values after pressing the PRINT button

- GLP conformant printouts after pressing the PRINT button

13.1 Technical data

 8-bit ASCII Code  8 data bits, 1 stop bit, no parity bit  Baud rate optional from 1200 - 9600 Baud

13.2 Pin allocation of balance output plug

88 ALT_B-PLT_A-PLT_F-BA-e-1333

13.3 Interface

Balance

Input data Busy signal GND

2 4 5

Balance

Printer

RS232C

RS2

RS232C RS232C

RS232C

RS2

RS232C

2 3 5 6 4

3 2 7 6

2 3 5 6 4

Balance – PC 25-pole

Balance – PC 9-pole

Balance - printer

ALT_B-PLT_A-PLT_F-BA-e-1333 89

13.4 Format Data transfer

1. Character

Sign -/ blank (weighing value)

2-9. Character

Weight or other data

10-12. Character

Weighing unit

13. Character

Stability display

14. Character

Carriage return

15. Character

Line feed

1°

2°

3°

4°

5°

6°

7°

8°

9°

10°

11°

12°

13°

14°

15°r

Character

Weight

Weighing unit

Stability

The data set consists of the following 14 characters:

Weighing mode (continuous output or output after pressing the PRINT button)

90 ALT_B-PLT_A-PLT_F-BA-e-1333

14 Error messages

ERR01

Weight value instable or zeroing not possible. Check the environmental conditions.

ERR02

Adjustment error, e.g. instable environmental conditions

ERR03

Adjustment error e.g. incorrect adjustment weight}

ERR04

Piece weight too small/instable

ERR05

Data transfer not possible, as weighing value is instable. Check the environmental conditions.

ERR06

Weighing value in density determining mode instable. Check the environmental conditions.

ERR07

Weighing value in percentage determining mode instable. Check the environmental conditions.

ERR08

Error at internal adjustment

Weighing value in formula mode instable. Check the environmental conditions.

“UNLOAD”:

Weighing range not achieved. Check position of the weighing pan.

“CAL But”

Adjust balance.

Weighing range exceeded, placed load exceeds the capacity of the balance. Unload the balance.

Weighing range not reached, e.g. weighing pan not in place

ALT_B-PLT_A-PLT_F-BA-e-1333 91

15 Service, maintenance, disposal

Before any maintenance, cleaning and repair work disconnect the appliance from the operating voltage.

15.1 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.

15.2 Service, maintenance

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

authorized by KERN.

 Ensure that the balance is regularly calibrated, see chap. Testing instruments

control.

15.3 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.

92 ALT_B-PLT_A-PLT_F-BA-e-1333

15.4 Instant help

Fault

Possible cause

The displayed weight does not glow.

The balance is not switched on.

The mains supply connection has been interrupted

(mains cable not plugged in/faulty).

Power supply interrupted.

The displayed weight is permanently changing

Draught/air movement

Glass doors not closed

Table/floor vibrations

Weighing pan has contact with other objects. Electromagnetic fields / static charging (choose

different location/switch off interfering device if possible)

The weighing result is obviously incorrect

The display of the balance is not at zero

Adjustment is no longer correct.

The balance is on an uneven surface.

Great fluctuations in temperature. Warm-up time was ignored. Electromagnetic fields / static charging (choose

different location/switch off interfering device if possible)

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.

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

ALT_B-PLT_A-PLT_F-BA-e-1333 93

16 Declaration of conformity

KERN & Sohn GmbH

D-72322 BalingenFrommern Postbox 4052 E-Mail: info@kern-sohn.de

Phone: 0049-[0]7433- 9933-0 Fax: 0049-[0]7433-9933-149 Internet: www.kern-sohn.de

Konformitätserklärung

Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den nachstehenden Normen übereinstimmt.

Declaration of conformity

We hereby declare that the product to which this declaration refers conforms to the following standards.

Prohlášení o

shode

Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu s níže uvedenými normami.

Declaración de conformidad

Manifestamos en la presente que el producto al que se refiere esta declaración está de acuerdo con las normas siguientes

Déclaration de conformité

Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente déclaration, est conforme aux normes citées ci-après.

Dichiarazione di conformitá

Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è conforme alle norme di seguito citate.

Conformiteitverklaring

Wij verklaren hiermede dat het product, waarop deze verklaring betrekking heeft, met de hierna vermelde normen overeenstemt.

Declaração de conformidade

Declaramos por meio da presente que o produto no qual se refere esta declaração, corresponde às normas seguintes.

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.

EU Directive

Standards

2004/108/EC

EN 61326-1 (2006) EN 61000-3-2 (2006) EN 61000-3-3 (1995) + A1 (2001) + A2 (2005)

2006/95/EC

EN 61010-1 (2001)

Signatur

Signature

Datum

Date

18.03.2013

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: info@kern-sohn.com, Internet: www.kern-sohn.com

Declaration of conformity

EC-Konformitätserklärung EC-Declaration of -Conformity EC- Déclaration de conformité EC-Declaración de Conformidad EC-Dichiarazione di conformità EC-Conformiteitverklaring EC- Declaração de conformidade EC- Prohlášení o shode EC-Deklaracja zgodności EC-Заявление о соответствии

Electronic Balance: KERN ALT_B, PLT_A, PLT_F

94 ALT_B-PLT_A-PLT_F-BA-e-1333

KERN & SOHN ALT 250-4B User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual