10. Declaration of conformity ____________________________________________________ 30
2 CH-BA-e-1432
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
4 CH-BA-e-1432
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
6 CH-BA-e-1432
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 .
CH-BA-e-1432 7
3. The suspended balance at a glance
3.1 Overview
1 Display
2 Keyboard
3 Hooks
4 Tape measure
8 CH-BA-e-1432
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:
kgThe current measuring unit is kilogram
lbThe 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
10 CH-BA-e-1432
UNIT-buttonSwitch over weighing unit (kglbN)
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
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
12 CH-BA-e-1432
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!
14 CH-BA-e-1432
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)
16 CH-BA-e-1432
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.
18 CH-BA-e-1432
5.6 Switch-over weighing unit
+
+
The next measuring unit will be displayed kg lbN 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.
20 CH-BA-e-1432
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
hi
5 %
5 %
α
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
d
1%
Safety
fastening
Perfect
working
order
e f g
hi
1% 5 % 5 %5 %5 %
α
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.
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
D
Konformitätserklärung
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
EN
Declaration of
conformity
We hereby declare that the product to which this declaration refers conforms
to the following standards.
CZ
Prohlášení o
shode
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
E
Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F
Déclaration de
conformité
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
I
Dichiarazione di
conformità
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
NL
Conformiteitverklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P
Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL
Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie dotyczy,
jest zgodny z poniższymi normami.
RUS
Заявление о
соответствии
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
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
Declaration of conformity
EC Declaration of Conformity 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 zgodnościEC-Заявлениеосоответствии