KERN & SOHN CH 50K100 User Manual

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KERN & Sohn GmbH

Ziegelei 1

E-Mail: info@kern-sohn.com

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

Internet: www.kern-sohn.com

Operating manual Electronic Suspending Balance

Logbook Regular maintenance and care

KERN CH

Version 3.2 08/2014 GB

D-72336 Balingen

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

CH-BA-e-1432

KERN CH

Electronic Suspending Balance

Version 3.2 08/2014

Operating instructions / Logbook

Contents

1. Technical data ______________________________________________________________ 3

1.1 Dimensions _________________________________________________________________ 4

2. General S afety Instructions ___________________________________________________ 5

2.1 Duties of the owner-operator ____________________________________________________ 5

2.2 Organizational measures _______________________________________________________ 5

2.3 Environmental conditions _______________________________________________________ 5

2.4 Pay attention to the instructions in the Operation Manual ______________________________ 6

2.5 Proper use __________________________________________________________________ 6

2.6 Improper Use ________________________________________________________________ 6

2.7 Warranty ____________________________________________________________________ 6

2.8 Safe working ________________________________________________________________ 7

2.9 Monitoring of Test Resources ___________________________________________________ 7

2.10 Testing upon acceptance _______________________________________________________ 7

2.11 Initial Commissioning __________________________________________________________ 7

2.12 Shutdown and storage _________________________________________________________ 7

3. The sus pended balance at a glance _____________________________________________ 8

3.1 Overview ___________________________________________________________________ 8

3.2 Overview visual displays and keyboard ___________________________________________ 10

3.3 Label______________________________________________________________________ 11

4. Commis s ioning ____________________________________________________________ 12

4.1 Unpacking _________________________________________________________________ 12

4.2 Scope of delivery ____________________________________________________________ 12

4.3 Checking the original dimensions _______________________________________________ 13

4.4 Battery operatio n ____________________________________________________________ 13

5. Operation _________________________________________________________________ 14

5.1 Safety instruct ions ___________________________________________________________ 14

5.2 Loading the suspended balance ________________________________________________ 16

5.3 Turn on/off _________________________________________________________________ 18

5.4 Taring _____________________________________________________________________ 18

5.5 Weighing __________________________________________________________________ 18

5.6 Switch-over weighing unit _____________________________________________________ 19

5.7 Functions __________________________________________________________________ 19

6. Menu _____________________________________________________________________ 21

7. Adjus tment ________________________________________________________________ 22

8. Cleaning, Maintenance and Dis pos al ___________________________________________ 23

8.1 Cleaning and Disposal ________________________________________________________ 23

8.2 Regular maintenance and care _________________________________________________ 24

8.3 Checklist „Regular maintenance“ ________________________________________________ 26

9. E nclos ure _________________________________________________________________ 29

9.1 Checklist „Enhanced maintenance“ (General revision) _______________________________ 29

10. Declaration of conformity ____________________________________________________ 30

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1. Technical data

KERN CH 15K20 CH 50K50 CH 50K100

Readability (d) 20 g 50 g 100 g Weighing range (max) 15 kg 50 kg 50 kg Taring range (subtractive) 15 kg 50 kg 50 kg Reproducibility 20 g 50 g 100 g Linearity ± 40 g ± 100 g ± 200 g Recommended adjustment

weight, not added (class) Stabilization time 2 s Warm-up time 10 min Units kg, lb, N Auto off 3 min Allowable ambient

temperature Ambient humidity (max ) 80 %

Battery (in series)

Display Digit height 11 mm

10 kg (M3) 20 kg (M3) 20 kg (M3)

5…+ 35 °C

1 x 9 V Block

Operating time 20 h

Housing size W x D x H 90 mm x 30 mm x 176.5 mm Housing material Synthetic material Material Hook Stainlees steel Net weight 250 g

CH-BA-e-1432 3

1.1 Dimensions

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2. General Safety Instructions

2.1 Duties of the owner-operator Follow national accident prevention regulations and all operator health a nd

safety at work and operating regulations.

 The balance may only be used for the proposed purpose. Any type of use which

is not specified in these operating instructions, will be considered as improper use. The customer is solely responsible for material damage and injury of persons resulting from an improper use, Messrs. KERN & Sohn will not be liable under any circumstance. Messrs . KERN & Sohn cannot be held liable, if the suspended balance is modified or used improperly and if damage is resulting from such use.

 Inspect and service suspended balance and load suspension device regularly

(see chap. 8.3).

 Log the test result and keep it in the logbook.

2.2 Organizational measures

 Only trained and instructed staff may operate the balance.  Make sure that the operating instructions are kept nearby the operation site of the

suspended balance.

 Assembly, commissioning and maintenance should only be carried out by trained

specialists.

 Weight-bearing components must not be replaced

2.3 Environmental conditions

 Never operate suspended balance in spaces exposed to explosion hazards. The

serial version is not explosion protected.

 Operate the suspended balance only under environmental conditions as specified

in these operating instructions (especially in chapter 1 „Technical data“).

 Do not expose the suspended balance to strong humidity. 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.

 Do not use suspended balance in environments exposed to corrosion hazards.  Protect the suspended balance against high humidity, vapours and dust.  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. Chang e lo cati on or remove source of interference.

CH-BA-e-1432 5

2.4 Pay attention to the instructions in the Operation Manual

 Carefully read this operation manual before setup and

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

 All language versions contain a non-binding translation.

The original German is binding.

2.5 Proper use

The balance you purchased is intended to determine the weighing value of material to be weighed. It is intended to be used as a “non-automatic“ balance, i.e. the material to be weighed is suspended on the load receptor only vertically, manually, carefully and without jerks. As soon as a stable weighing value is reached the weighing value can be read.

 Use the suspended balance only for lifting and weighing of freely movable loads.  Danger of injury due to improper use. Not allowed are e.g.:

- Exceeding the allowed nominal load of crane, suspended balance or any

type of load attachment devices

- Conveying persons,

- Pulling loads over an inclined surface,

- Tearing-off, pulling or towing loads.

 Modifications or reconstructions of the suspended balance are not al l owed.

2.6 Improper Use

Do not use balance for dynamic weighing. In the event that small quantities are removed or added to the material to be weighed, incorrect weighing results can be displayed due to the “stability compensation“. (Example: Slowly draining fluids from a container suspended on the balance.) Do not leave permanent load suspended on the balance. This may damage the measuring system as well as safety-relevant parts.

The balance may only be used according to the described conditions. Other areas of use must be released by KERN in writing.

2.7 Warranty

Warranty claims shall be voided in case

 Our conditions in the operation manual are ignored  The appliance is used outside the described uses  The appliance is modified or opened  Mechanical damage and damage caused by media, liquids,  Natural wear and tear  The appliance is improperly set up or incorrectly electrically connected  The measuring system is overloaded

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2.8 Safe working

 Do not stand under swinging loads, see chap. 5.1.

2.9 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.

2.10 Testing upon acceptance

Inspect packaging immediately upon receipt and inspect device when unpacking, see chap. 4.1. in the event of any evident damage.

2.11 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. For checking original dimensions, s. chap. 4.3

2.12 Shutdown and storage

 Switch off suspended balance and remove batteries  Do not store suspended balance outdoor s .

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3. The suspended balance at a glance

3.1 Overview

1 Display 2 Keyboard 3 Hooks 4 Tape measure

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1 Battery compartment 2 Tape measure

CH-BA-e-1432 9

3.2 Overview visual displays and keyboard

Key

Description

Description of function

• Switch on balance

• Scroll forward in menu

• Set weight display

• Confirm menu setting

Displays:

kg The current measuring unit is kilogram

lb The current measuring unit is pound

N The current measuring unit is Newton

 Indicates the weight value depending on the active setting H1-H6

LO Capacity of batteries exhausted

E Overload

Keyboard:

(see chap. 5.7). H1-H4: Data-Hold function H5 Animal weighing function H6 Peak value function

ON/OFF button

• Switch off balance (hold button)

• Taring

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UNIT-button Switch over weighing unit (kglbN)

HOLD button

• Display average value for animal weighing

3.3 Label

(example)

 Do not stand or go under suspended loads.  Do not use on building site.  Keep an eye on suspended loads.

 Do not exceed nominal rated load of balance.

 The product conforms to the requirements of the

German Equipment and Product Safety Act.

CH-BA-e-1432 11

4. Commissioning

Thanks for your comprehension. Your KERN Quality assurance team

• Suspended balance, see chap. 3.0

+ Always observe chapter 2 „General Safety Instructions“!

4.1 Unpacking

Once delivered and unpacked, suspended balance will not be taken back.

SAFETY

INSTRUCTIONS

The suspended balance is sealed by KERN.

 Removal from packaging is also sealed.

+ Broken seal obliges to purchase.

for protection against

break

Fig.: Seal

4.2 Scope of delivery

Remove balance and accessories from packaging, remove packaging material. Verify that there has been no damage and that all packing items are present.

• Hook (stainless steel)

• Batteries (1 x 9 V block)

• Operating instructions / logbook

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4.3 Checking the original dimensions

 Enter the original dimensions shown on the production data sheet in the grey

boxes of checklist chap. 8.3.

 Check original dimension of suspended balance; for implementation see chap. 8.3

„Regular Maintenance“

 Enter all data (date, tester, results) in the first line under „Inspection before first

use“ in the checklist (see chapter 8.3)

If the dimensions of your first safety inspection do not match those of KERN, the balance must not be put into operation. In t his cas e

CAUTION

4.4 Battery operation

please contact a service partner authorised by Messrs. KERN.

1 x 9 V block battery

Push out battery cover on the rear side of the balance in arrow direction. Insert V block battery. Reinsert the batter y cover. If the batteries are empty, in the balance display appears “LO”. Press ON/OFF/TARE -key and replace the batteries immediately. In order to save the battery, the balance switches automatically off after 4 minutes without weighing. This auto-off function can be deactivated in the menu (see chap. 6).

CH-BA-e-1432 13

5. Operation

Keep balance only by hand, see fig. (do not use a crane or alike).

5.1 Safety instructions

DANGER

Risk of injury due to falling loads!

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Check all parts (hook, carbines, rings, rope slings,

any kind of shock, torsion and oscillating (e.g. caused

(example)

 Do not exceed nominal rated load of suspended bal ance

or any kind of attachment device on the suspended

 Take great care when operating the crane and follow the

general rules for crane operation.



cables, chains etc.) for excessive wear or damage

 Work only with appropriate speed  Always avoid vibrations and horizontal forces. Avoid

by inclined suspending)

 Do not use the suspended balance for conveying loads.

 Do not stand or go under suspended loads.

 Do not use on building site.

 Keep an eye on suspended loads.

balance.

CH-BA-e-1432 15

5.2 Loading the suspended balance

For good weighing results observe the following, illustrations s ee ne xt page:  Do not suspend the balance on load attachment devices. Use only when keeping

by hand.

 Do not pull or push the load or the loaded balance.  Do not pull the hook horizontally.

Loading the balance

1. Position the hook of the suspended balance over the load.

2. Suspend and lift the load. (direct ly on the hook)

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Keep balance only by hand!

Do not push or pull

Do not pull the hook horizontally

CH-BA-e-1432 17

5.3 Turn on/off

Start-up

 Press the ON/OFF/TARE-key. The display lights up and the balance carries out a

selftest. The selftest is completed when the weight value 0.0 appears on the display.

Switching Off  Press the ON/OFF/TARE-key for a long time.

5.4 Taring

 Suspend preload.

Press the ON/OFF/TARE-button, the zero display appears. The weight of the container is now internally saved.

 Weigh the material, the net weight will be indicated.  After removing the preload weight appears as negative display.  To delete the tare value, remove load from the suspended balance and press the

TARE button.

5.5 Weighing

 Load the suspended balance.

The weight value will be displayed at once.

Overload warning

Overloading exceeding the stated maximum load (max) of the balance, minus a possibly existing tare load, must be strictly avoided. This could cause damage to the balance. Exceeding the maximum load is indicated by the display „E“. Unload bal ance or reduce preload.

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5.6 Switch-over weighing unit

The next measuring unit will be displayed kg lbN after each press of the UNIT button. The  indicator shows the active unit.

5.7 Functions With help of the Hold-key the following functions can be activated:

Adjustment Function

H1 Data-Hold function 1

Weighing value frozen for 5 sec. after pressing the Hold-key

H2 Data-Hold function 2

The weighing value will be frozen a fter pr es sing the Hold-key until another key is actuated

+ see chap.

H3 Data-Hold function 3

The weighing value is automatically frozen for 5 sec.

H4 Data-Hold function 4

The weighing value is automatically frozen after reaching a stable value until a key will be actuated

H5 Animal weighing function

H6 Peak value functi on

5.7.1

see chap.

5.7.2

see chap.

5.7.3

CH-BA-e-1432 19

5.7.1 Data-Hold function

 Switch on the balance, keep the HOLD-button pressed until the current setting

„Hx“ (H1 – H6) appears.

 Press ON/OFF/TARE-button repeatedly until the desired setting „H1-H4“ is

displayed.

 Confirm setting with the HOLD button.  Suspend the material to be weighed  The weight value is fixed and displayed depending on the setting (H1 – H4) (see

chap. 5.7), represented by the [] in the upper left.

5.7.2 Animal weighing function

This function is suitable for busy weighing procedures. The result is a mean value formed by 16 weighing values.

 Switch on balance using the ON/OFF/TARE–button  Press the HOLD-button and keep it pressed until „H x“ in the display appears  Press the ON/OFF/TARE-button until „H5“ in the display appears.  Save the setting by shortly pressing the HOLD-button  Press the HOLD-button anew  Upside left in the display a [] st ar ts flas hing.  Suspend a load  As long as the [] flashes, the weighing values are recorded.  After that the average weighing value of the recorded weighing values is

recorded.

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5.7.3 Peak value function

This function displays the highest load value (peak value) of a weighing. Measuring frequency: 200ms

Attention:

Never exceed the maximum permitted load of the peak value on the balance (!!Danger of breaking!!).

• Switch on balance using the ON/OFF/TARE–button

• Press the HOLD-button and keep it pressed until „H x“ in the display appears

• Press the ON/OFF/TARE until „H6“ in the display appears

• Save the setting by shortly pressing the HOLD-button

• Suspend a load

• The peak value function is displayed by a [] upside left

A negative value [-] is displayed as soon as the balance is relieved

6. Menu

 When the balance is switched off, press the HOLD-key and keep it pressed  Do not release the HOLD-key. Press also the ON/OFF/TARE-key and keep it

pressed

 Keep the ON/OFF/TARE-key pressed, however release the HOLD-key  Press HOLD-key anew  Keep both keys pressed until in the display “tr” appears  Release both keys. The balance is situated in the menu.  Using the ON/OFF/TARE button you can select between the following functions:

 tr (Zero tracking): ON/OFF  AF (Auto off): ON/OFF

 rST (reset to factory settings): YES/NO  Press the HOLD button to confirm the selected function  In the display appears the current setting „ON“ or „OFF“ resp. „YES“ or „NO“. You

can select between „ON“ or „OFF“ and/or „YES“ or „NO“ with the ON/OFF/TARE-button. Confirm your selection with the HOLD-key. After a short

period the balance returns automatically to weighing mode.

CH-BA-e-1432 21

7. Adjustment

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 of approx. 1 minute is recommended for stabi li zation. Prepare adjustment weight, for details see chap. 1 „Technical data“.

 Switch on balance

 Press Unit button and hold down (approx. 3 sec) until „CAL“ is displayed.

 Wait until the weight value of the required adjustment weight (e.g. 10 kg, see

chap. 1) is displayed.

 Attach adjustment weight, a short time later „F“ will appear.



 After adjustment the balance automatically returns to weighing mode.

An adjusting error or incorrect adjusting weight will be indicated by the error message; repeat adjustment procedure

22 CH-BA-e-1432

8. Cleaning, Maintenance and Disposal

Risk of injury and risk of material damage!

The suspended balance is part of the lifting gear! For a safe operation please observe the following:

Danger

8.1 Cleaning and Disposal

 Have carried out a regular maintenance by trained specialized

staff

 Carry out regular maintenance and servicing, see chap. 8.3.  Have the parts exchanged only by trained specialized staff.  If there arose discrepancies with the safety checklist, the balance

must not more be put into operation.

 Do not repair the suspended balance yourself. Repair may only be

carried out by service partners authorized by Messrs. KERN.

Damage to suspended balance!

 Do not use industrial solutions or chemicals

CAUTION

 Clean the keyboard and the display with a soft cloth soaked in mild window

cleaning agent.

 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.

(e.g. acid  embrittlement).

CH-BA-e-1432 23

8.2 Regular maintenance and care

 The regular 3-mont h m aintenance may only be carried out by an expert with

competent knowledge of working with suspended balances. Thereby the nati onal regulations for prevention of accidents as well as the working, operation and safety regulations of the owner-operator.

 To check the dimensions only use suitable test devices.  The regular 12-month maintenance must only be carried out by trained

specialized staff (KERN customer service).

 The results of the maintenance must be written down in the checklist (chap. 8.3).  The additional results of the extended maintenance have to be entered in the

checklist (chapter 9.1).

 The load suspension device is to be cleaned before inspection, see chap. 8.1.

24 CH-BA-e-1432

Regular maintenance:

Prior to each usage

 Check for fault-free oper at ion of the attachment devi ces

Check the attachment device (handle grip) for wear and tear,

documented by the service partner (see list, chap. 9.1).

weighings

Initial start-up,

every 3 months or definitely after

12 500 weighing processes

Every 12 m onths or in any case after 50 000 weighings

Every 10 years or anyway after 500 000

Note

During the revision watch out for wear and tear according to the following drawings (chap. 8.3).

Rejection criteria: Load suspension devices may no longer be used when e.g.

 Check all dimensions, see checklist chap. 8.3 

such as e.g. plastic deformation, mechanical damage (unevenness), notches, striation, cracks, corrosion, thread damage and torsions.

 Remove balance from use immediately if a reading exceeds

the permitted deviation from the original reading (see checklist, chap. 8.3) or any other fault is identified.

 All repairs and replacement parts (e.g. hook) must be

 If the enhanced maintenance has to be carried out by

trained staff (KERN customer service). At this general revision all load carrying parts must be checked for gaps with magnetic powder

 Plastic parts such as handle must be visually inspected

 Replace the crane balanc e enti r el y

+ Deviations are identified during the inspections specified for servicing. + The type or load rating plate is missing. + Load suspension devices known to have been overloaded or subject to

other harmful influences may no longer be used and/or may be re-used only after inspection.

CH-BA-e-1432 25

8.3 Checklist „Regular maintenance“ Original dimensions suspended balance*, serial no.: ………………………………… Capacity ……………………………… Total scale Hooks

d (mm) e (mm) f (mm) g (mm) h (mm) i (m m) Wear and tear

Angle α (°)

Date ………………………………… Tester ……………………………………… *These data can be found in the document attached to the balance. Please keep this document always available.

Total

scale

d e f g

Max. admitted variation Revision prior to first

use 3 months/12 500 x

6 months/25 000 x

9 months/37 500 x

12 months/50 000 x

15 months/62 500 x

18 months/75 000 x

21 months/87 500 x

1% 1% 5 % 5 %

Hooks

h i

5 %

10 °

Optical test

Wear (see crosshatched areas)

No deformation, wear or cracks

handle hook

chain link

other parts

Date Tester

CH-BA-e-1432 26



Max. admitted variation

Revision prior to first use

24 months/100 000 x

27 months/112,500 x 30 months/125 000 x 33 months/137 500 x

36 months/150 000 x

39 months/162 500 x 21 months/87 500 x 42 months/175 000 x 45 months/187 500 x

48 months/200 000

51 months/212 500 x 54 months/225 000 x 57 months/237 500 x

Total scale Hooks Optical test

No deformation, wear or cracks

chain

handle hook

link

other parts

Date Tester

Safety fastening

Perfect working order

e f g

h i

1% 5 % 5 % 5 % 5 %

10 °

Wear (see crosshatched areas)

60 months/250 000x

All load carrying parts have to be exchanged by a service partner authorised by KERN.

bold letters = this maintenance work has to be carried out by a service partner authorized by KERN.

CH-BA-e-1432 27

1 Chain link

CH-BA-e-1432 28



9. Enclosure

9.1 Checklist „Enhanced maintenance“ (General revision)

The enhanced maintenance has to be carried out by a service partner authorized by KERN.

Suspending balance Mod el ………………………………….. Serial no. ……………………………………………..

Interval

12 months/50 000 x

24 months/100 000 x

36 months/150 000 x

48 months/200 000 x

60 months/250 000 x

72 months/300 000 x

84 months/350 000 x

96 months/400 000 x

108 months/450 000 x

120 months/500 000x

Magnetic powder test for cracks

Replace suspended balance completely

Hooks

Chain links

(marked areas)

Hand grip Date Name Signature

CH-BA-e-1432 29

10. Declaration of conformity

KERN & Sohn GmbH

D-72322 Balingen-Frommern

E-Mail: info@kern-sohn.de

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

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 conformità

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 2006/95/EC

EN 61010-1:2010 2006/42/EC

EN 13155/A2:2009

Signature

Date

10.07.2013

Ort der Ausstellung

72336 Balingen

Albert Sauter KERN & Sohn GmbH

Manager

KERN & Sohn GmbH, Ziegelei 1, D-72336 Bali nge n, Tel. +4 9-[0]7433/9933-0

Postbox 4052

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