KERN & Sohn GmbH
Ziegelei 1
email: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Internet: www.kern-sohn.com
Operating instructions
Electronic Crane Scales
Logbook
Regular maintenance and care
KERN HFB
Version 1.2
10/2012
GB
D-72336 Balingen
Fax: +49-[0]7433-9933-149
HFB-BA-e-1212
2
KERN HFB
Electronic Suspending Balance
GB
Version 1.2 10/2012
Operating instructions / logbook
Table of Contents
1. Technical Data ______________________________________________________________ 3
1.1 Dimensions _________________________________________________________________ 4
1.2 EC-Declaration of -Conformity ___________________________________________________ 5
2. General Safety Instructions ___________________________________________________ 6
3. The crane scales at a glance __________________________________________________ 9
3.1 Overview ___________________________________________________________________ 9
3.2 Display ____________________________________________________________________ 10
3.3 Keyboard __________________________________________________________________ 11
3.4 Numerical input via the navigation buttons ________________________________________ 11
3.5 Radio remote control _________________________________________________________ 12
3.6 Sticker ____________________________________________________________________ 12
4. Commissioning ____________________________________________________________ 13
4.1 Unpacking _________________________________________________________________ 13
4.2 Checking the original dimensions _______________________________________________ 14
4.3 Rechargeable battery operation _________________________________________________ 14
4.4 Suspending the balance_______________________________________________________ 15
5. Operation _________________________________________________________________ 16
5.1 Safety instructions ___________________________________________________________ 16
5.2 Loading the crane scales ______________________________________________________ 17
5.3 Turn on/off _________________________________________________________________ 20
5.4 Setting the balance to zero ____________________________________________________ 20
5.5 Taring _____________________________________________________________________ 21
5.6 Weighing __________________________________________________________________ 21
5.7 Record weight value (freeze) ___________________________________________________ 22
6. Menu _____________________________________________________________________ 23
7. Adjustment ________________________________________________________________ 25
8. Error messages ____________________________________________________________ 26
9. Cleaning, Maintenance and Disposal ___________________________________________ 27
9.1 Cleaning and Disposal ________________________________________________________ 27
9.2 Regular maintenance and care _________________________________________________ 27
9.3 Checklist „regular maintenance“, (see chapter 9.2) __________________________________ 31
9.4 12-month maintenance (see chap. 9.2) ___________________________________________ 35
10. Appendix __________________________________________________________________ 36
10.1 Checklist „Enhanced maintenance“ (General revision) _______________________________ 36
10.2 List „spare parts and repair of safety-relevant parts“ _________________________________ 37
HFB-BA-e-1212
1. Technical Data
6 V 1.2 A
Battery Size 23A (1 x 1.5V)
KERN HFB 150K50 HFB 300K100 HFB 600K200
Readability (d) 50 g 100 g 200 g
Weighing range (max) 150 kg 300 kg 600 kg
Taring range (subtractive) 150 kg 300 kg 600 kg
Reproducibility 50 g 100 g 200 g
Linearity ±100 g ±200 g ±400 g
Recommended adjustment
weight, not added (class)
Stabilization time 2 s
Precision 0.2 % of max.
Warm-up time 10 min
Units kg, lb
Allowable ambient
temperature
Relative humidity 10 to 80 %, non-condensing
Supply voltage 220V - 240V AC 50 Hz
Secondary voltage
powerpack
Rechargeable battery
(standard equipment)
150 kg (M1) 300 kg (M1) 500 kg (M1)
0…+40 °C
9V, 800 mA
Service life – background illumination ON 30 h
Service life – background illumination OFF 40 h
Loading time 12 h
Display Digit height 25 mm
Housing size W x D x H 163 mm x 126 mm x 159 mm
Housing material Synthetic material
Material hook and shackle Nickel plated steel
Net weight 2 kg
Remote control (standard
equipment)
HFB-BA-e-1212 3
W x D x H 48 x 16 x 95 mm
4
1.1 Dimensions
HFB-BA-e-1212
1.2 EC-Declaration of -Conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
E-Mail: info@kern-sohn.de
Tel: 0049-[0]7433- 9933-0
Internet: www.kern-sohn.de
D
Konformitätserklärung
Wir erklären hierm it, dass das Produkt, auf das sich diese Erk lärung bezieht,
mit den nachstehenden Normen übereinstimmt.
GB
Declaration of
conformity
We hereby declare that the product to which this dec laration refers c onforms
with the following standards.
CZ
Prohlášení o
shode
Tímto prohlašujem e, že v ýrobek , k terého se toto proh lášení 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 res ponsabilité que le produit, auquel se r apporte la
présente déclaration, est conforme aux normes citées ci-après.
I
Dichiarazione di
conformitá
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
NL
Conformiteitverklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P
Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL
Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie dotyczy,
jest zgodny z poniższymi normami.
RUS
Заявление о
соответствии
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
EU Directive
Standards
2004/108/EC
EN55022: 2006 A1:2007
EN55024: 1998+A1:2001+A2:2003
2006/95/EC
EN 60950-1:2006
EN 60065:2002+A1:2006
2006/42/EC
EN13155:2003+A2:2009
2005 / 32 / EC
Date: 04.03.2011
Signature:
KERN & Sohn GmbH
Management
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
Postfach 4052
Fax: 0049-[0]7433-9933-149
EC-Declaration of -Conformity
EG-Konformitätserklärung EC-Declaration of -Conformity
EC-
Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
Electronic Balan ce: KERN HFB
EN61000-3-3:1995+A1:2001+A2:2005
HFB-BA-e-1212 5
6
2. General Safety Instructions
Duties of the owner-operator
Follow the national accident prevention regulations as well as the working, operating
and safety regulations of the owner-operator.
Observe all safety regulations of the crane manufacturer.
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 crane scales are modified or
used improperly and if damage is resulting from such use.
Carry out regular maintenance and care of the crane scales, the crane and the
load suspension devices (see chapter 9).
Log the test result and keep it in the logbook.
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
crane scales.
Assembly, commissioning and maintenance should only be carried out by trained
specialists.
Repair of safety-relevant pieces may only be carried out by KERN or by service
partners authorized by Messrs. KERN. (competence certificate or training).
Use original spare parts only.
All repairs and spare parts must be documented by the service partner (see list,
chap. 10.3).
All maintenance must be documented (see checklist chap. 9.3).
Load suspending components may only be exchanged as a complete spare parts
set. The dimensions of the new components must be noted (see checklist chapter
9.3).
Ambient conditions
Never operate the crane scales in explosive environment. The serial version is
not explosion protect e d.
Operate the crane scales only under environmental conditions as specified in
these operating instructions (especially in chapter 1 „Technical data“).
Do not expose the crane scales to strong humidity. Non-per mitt e d 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 operate the crane scales in corrosive environment.
Protect the crane scales against high humidity, vapours and dust.
HFB-BA-e-1212
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 locat ion or
remove source of interference.
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 crane hook only vertically, manually,
carefully and without jerks. As soon as a stable weighing value is reached the
weighing value can be read.
Use the crane scales 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, crane scales or any type of
load attachment devic es
- Conveying persons,
- Pulling loads over an inclined surface,
- Tearing-off, pulling or towing loads.
Modifications or reconstructions of the crane scales or of the crane are not
allowed.
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“ in the balance. (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.
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 meas ur i ng sy s tem is overloaded
Safe working
Do not stand underneath suspended loads!
Position the crane in a way that the load is lifted vertically.
When working with the crane and crane scales wear personal safety equipment
(helmet, safety shoes etc.).
HFB-BA-e-1212 7
8
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.
Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
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.
Check the original dimensions, see chap. 4.2.
Shutdown and storage
Take off the crane scales from the crane and dismantle all load attachment
devices from the crane scales.
Do not store the crane scales at open air
HFB-BA-e-1212
3. The crane scales at a glance
4
Safety bracket
The crane scales are a multi-purpose and cost-saving solution for overhead weighing
applications such as e.g. recycling, metal processing, machine engineering, transport
and logistics.
With the radio remote control operation will be more comfortable yet.
3.1 Overview
Fig. 1: Scales fr ont an d rear vi ew Fig. 2: Radio remote control
HFB-BA-e-1212 9
1 Eyelet 7 Antenna
2 Display 8 Keyboard,
3 Keyboard
5 Hook, r evolv able
6 Second di splay
see chapter 3.5
10
3.2 Display
[] over the symbol appears if
the capacity of the rechargeable battery will soon be
exhausted. The balance will be ready to operate for
about another 30 minutes, then it will switch off
automatically.
a the weight is in the area around the zero point
TARE the scales have been tared
HOLD the data-hold function is active
kg the current weighing unit is „kg“
lb the current weighing unit is „lb“
The LED display above is illuminated when the battery is being
recharged.
HFB-BA-e-1212
3.3 Keyboard
Button Designation Description of function
Switch-over weighing unit.
UNIT button
Exit menu, back to weighing mode.
HOLD button
TARE button Taring
ZERO button
ON/OFF key Turn on or off the balanc e
3.4 Numerica l input via the navigation buttons
Button Navigation button Function
ESC Delete
The weight display is „frozen“ via the HOLD button
until the HOLD-button is pressed anew.
Corrects the zero point of the balance. The display is
set to zero.
Digit selection
Increase flashi ng digit
HFB-BA-e-1212 11
Terminate input
12
3.5 Radio remote control
The balance can be operated by the radio remote control like by a keyboard. All
functions (excepted ON/OFF) can be selected.
The red LED must light up when any button is pressed. If it does not light up, the
batteries in the remote control must be exchanged.
Range on free surface (free of buildings) approx. 20 m.
3.6 Sticker
1
2
3
4
Do not stand or go under suspended loads.
Taring
Zeroing
Switch-over weighing unit
The weight display is „frozen“ via the
HOLD button until the HOLD-button is
pressed anew.
(Example)
Do not use on building sites.
Suspended loads have to be observed constantly.
Do not exceed the nominal load of crane scales.
The product meets the requirements of the German
Equipment and Product Safety Act.
HFB-BA-e-1212
4. Commissioning
Thanks for your comprehension.
Your KERN Quality assurance team
+ Always observe chapter 2 „General Safety Instructions“!
+ Before every use check the firm fit of the nut (A) and
lock washer (B), see chap. 9.2 „Regular maintenance“.
4.1 Unpacking
Once delivered and unpacked, crane scales will not be
taken back.
SAFETY
INSTRUCTIONS
for protection against
break
Only use original packaging for returning.
Make sure that all parts are completely present.
• Crane scales
• Mains adapter
• Remote control
• Operating instructions (logbook)
The crane scales have been sealed by Messrs. KERN.
The eyelet and the hooks are sealed by Sella tape .
The packaging is also sealed by adhesive tape.
+ Broken seal obliges to purchase.
HFB-BA-e-1212 13
14
4.2 Checking the or i ginal dime nsions
Material damage on crane scales
Enter the original dimensions of the product datasheet into the grey fields of the
checklist chap. 9.3.
Realization of all safety checks, see chapter 9.2 „Regular maintenance after three
months“
Enter all data (date, tester, results) in the first line under „Inspection before first
use“ in the checklist (see chapter 9.3)
If the dimensions of your first safety inspection do not match those
of KERN, the balance must not be put into operation. In this case
please contact a service partner authorized by Messrs. KERN.
CAUTION
4.3 Rechargeable battery operation
Only use the delivered mains adapter.
Make sure that the mains adapter, the cable and the
CAUTION
mains plug are in a perfect condition.
Do not use the crane scales during the loading process.
Before the first use, the rechargeable battery should be charged by connecting it to
the mains power cable for at least 15 hours. The operating time of the rechargeable
battery is approx. 40 hours. In case of a background illumination the operating time is
reduced. Charging time until complete recharging is approx. 12h.
To save the rechargeable battery, in the menu (see chap. 6) the automatic switch-off
function „F7 off“ can be activated, switch-off time selectable after 0, 3, 5, 10, 20
minutes.
If in the display an arrow [] appears above the battery symbol or „bat lo“, the
capacity of the rechargeable battery soon will be exhausted. The balance will be
ready to operate for about another 30 minutes, then it will switch off automatically.
Connect the power cable as soon as possible to load the rechargeable battery.
The LED display above informs you during loading about the loading status of
the rechargeable battery.
red: Voltage has dropped below prescribed minimum.
green: Rechargeable battery is completely charged
yellow: The rechargeable battery is loaded.
When the crane scales are out of operation for a longer period, remove the battery.
HFB-BA-e-1212
4.4 Suspending the balance
Condition
The crane needs a safety bracket (1) that the unloaded crane scales cannot fall
down.
If the safety bracket is missing or damaged, please contact the crane manufacturer in
order to receive a hook with this safety equipment.
Suspend the crane scales on the lower hook of a crane and close the safety
bracket.
The crane scale’s upper eyelet should rest in the saddle (2).
HFB-BA-e-1212 15
16
5. Operation
Always work with particular care according to the general
Check all parts (hook, eyelet, rings, rope slings, cables,
safety bracket of the hook
or if it is missing completely, the scales must not be
any kind of shock, torsion and oscillating (e.g. caused
(Example)
Do not exceed the nominal load of crane, crane scales
nd of load attachment devices at the crane
5.1 Safet y instructions
DANGER
Risk of injury due to falling loads!
rules for crane operation.
chains etc.) for excessi ve wear or damage
If faults can be seen on the
used.
Work only with appropriate speed.
Always avoid vibrations and horizontal forces. Avoid
by inclined suspending).
Do not use the crane scales for transport of loads
Do not stand or go under suspended loads.
Do not use on building sites.
Suspended loads have to be observed constantly.
or any ki
scales.
HFB-BA-e-1212
5.2 Loading the crane scales
For good weighing results observe the following, illustrations see next page:
Only use load attachment devices which guarantee a one-spot suspension and
where the scales can be suspended freely .
Do not use too large load attachment devices which do not guarantee any one-
spot suspension.
Do not use multiple suspensions.
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 crane scales over the load.
2. Move downwards the crane scales until the load can be suspended on the hook
of the balance. Reduce the speed when the respective height is going to be
reached.
3. Suspend the load on the hook. Ensure that the safety bracket is closed. If the load
is fixed by slings, ensure that the slings rest completely on the saddle of the
balance hook.
4. Lift-off the load slowly.
When the load is fixed by slings, ensure that the load is well balanced on both
sides and that the slings are correctly positioned
HFB-BA-e-1212 17
18
Only use load attachment devices
which guarantee a one-point
suspension and where the scales
can be suspended freely.
Do not use too large load
attachment devices which cannot
guarantee a one-point
suspension.
HFB-BA-e-1212
Do not push or pull
Do not pull the hook
horizontally
Do not use multiple
suspensions
HFB-BA-e-1212 19
20
5.3 Turn on/off
Start-up
Press the ON/OFF button on the balance keyboard. The display lights up and the
balance carries out a selftest. The selftest is completed when the weight value 0
appears on the display.
Switch on only possible at the keyboard of the balance.
Switching Off
Press the ON/OFF button on the balance keyboard.
5.4 Setting the balance to zero
In order to obtain optimal weighing results, reset to zero the balance before weighing.
Further adjustments are possible in the menu, see chapter 6.
Manual
Unload the balance
Press the ZERO button, the balance begins to reset to zero.
The [] symbol over a appears.
Automatic
In the menu can be changed the amount of the automatic zero point correction,
see chap. 6 / Function „F3 a2n“.
HFB-BA-e-1212
5.5 Taring
Suspend preload.
Press the TARE button, the zero display and the [] symbol abov e TARE will
appear. 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 crane scales and press the TARE
button.
5.6 Weighing
Load the crane scales.
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 „--ol-“.
Unload balance or reduce prel oad.
HFB-BA-e-1212 21
22
5.7 Record weight value (freeze)
Press the HOLD button to „freeze“ or to record the current weight value.
It remains displayed until it is deleted. The [] symbol above HOLD appears.
In order to delete the "frozen" or the recorded weight, press the HOLD button.
The [] symbol above HOLD extinguishes.
HFB-BA-e-1212
6. Menu
Navigation in the menu:
Call function
Switch-on balance and during the selftest
press the TARE button. The first function F0CAP is
displayed.
Select function
Select setting
Change settings
Confirm setting
Exit menu / Return to
weighing mode
The TARE button allows to select the individual
functions one after the other .
Confirm the selected function by the ZERO button. The
current setting will be displayed.
Use the TARE button to switch over into the available
settings.
Press down and hold the ZERO button, the balance
returns to the menu
Press the UNIT button.
HFB-BA-e-1212 23
24
Overview:
Available
settings
Function
F0 CAP
Select capacity
F1 unit Not documented
F2 res
Select resolution
F3 a2n
Automatic zero point
correction
(zero tracking)
30k Max = 30 kg
60k Max = 60 kg
150k Max = 150 kg
300k Max = 300 kg
600k Max = 600 kg
inC 5* 5
inC 10 10
0.5 d 0.5 d
1 d* 1 d
2 d 2 d
4 d 4 d
Description
Default setting HFB 150K50
Default setting HFB 300K100
Default setting HFB 600K200
F4 Flt
Filter
F5 inP Internal A/D converter value
F6 bk
Display background
illumination
F7 off
Automatic shutdown
function
Flt 1 fast
Flt 2*
Flt 3
Flt 4
Flt 5
bk Au Background illumination switches on
bk of Background illumination off
bk on Background illumination on
of 0
of 3
of 5
of 10
of 20
slow
automatically when loaded or a
button is pressed
Balance will switch-off automatically
after the set period.
Selectable 0/3/5/15/ 2 0 minutes.
a specialist with competent knowledge.
Modifications may only be carried out by
F8 Grv Not documented
F9 CAL Adjustment, see chapt. 7
* = default setting
HFB-BA-e-1212
7. Adjustment
Switch-off balance and attach a carrying help if necessary.
Switch-on balance with attached carrying help and during the selftest press the
TARE button. The first function “F0CAP“is displayed.
Press the TARE button repeatedly until „F9 CAL“ will be displayed.
Press the ZERO button, „UnlD“ is displayed.
Unload the balance, wait until the [] symbol above HOLD appears.
Press the ZERO button, the currently set adjustment weight is displayed.
In order to change, select the number to be changed by the HOLD button and set
the desired value using the TARE button, the active digit flashes.
Confirm by the ZERO button, „Load“ will be displayed.
Attach the adjustment weight and wait until the [] symbol above HOLD appears
Press the ZERO button.
After successful adjustment the balance carries out a selftest, then it
automatically returns to weighing mode.
An adjusting error or incorrect adjusting weight will be indicated by the error
message; repeat adjustment procedure
HFB-BA-e-1212 25
26
8. Error messages
Error
message
Description
Possible causes
been damaged
Zeroing range exceeded
(normally 4% max)
Value outside the A/D changer
Damaged electronics
At an instable weighing value
actuated
Reduce tare load
--ol- Maximum load exceeded
Reduce load
Check whether the balance has
Err 4
Err 5
Err 6
Err 9
Err 17 Tare value out of range
Ba lo
Should other error messages occur, switch balance off and then on again. If the error
message remains, inform manufacturer.
Keyboard error
range
ZERO or TARE button
Capacity of rechargeable
battery exhausted
Overload when zeroing
Improper operation of the balance
Weighing plate not installed
Damaged weighing cell
Wait for a stable weighing value
Recharge battery
HFB-BA-e-1212
9. Cleaning, Maintenance and Disposal
Risk of injury and risk of material damage!
The crane scales are part of a hoisting device!
For a safe operation please observe the following:
Have carried out a regular maintenance by trained specialized
Danger
9.1 Cleaning a nd Disposal
staff
Carry out regular maintenance and care, see chapter 9. 2 and 9. 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 crane scales by yourself. Repair may only be
carried out by service partners authorized by Messrs. KERN.
Damage on the crane scales!
Do not use any 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.
9.2 Regular maintenance and care
The regular 3-month maintenance may only be carried out by an expert with
competent knowledge of working with crane scales. Thereby the national
regulations for prevention of accidents as well as the working, operation and
safety regulations of the owner-operator must be observed.
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. 9.3).
The additional results of the extended maintenance have to be entered in the
checklist (chapter 10.1).
The replaced spare parts also must be entered, (chapter 10.2)
HFB-BA-e-1212 27
28
Regular maintenance:
Prior to each usage Check the firm fit of the nut (A) and safety disk (B).
HFB-BA-e-1212
Check the application of the safety bracket on the hook,
partner (see list, chap. 10.2).
Initial
Commissioning,
every 3 months or
anyway after
12 500 weighings
Every 12 m onths or
in any case after
50 000 weighings
Check all dimensions, see checklist chap. 9.3
moreover check for fault and corr ect f uncti o n
Check the stable fit of the eyelet.
Visual check of chain for damage and corrosion.
Check the chain and the eyelet for wear and tear, such as
e.g. plastic deformati o n, mech ani cal da mag e (unevenness),
notches, striation, cracks, corrosion, thread damage and
torsions.
If a dimension exceeds the admitted deviation from the original
dimension (see checklist, chap. 9.3) or if other discrepancies
have been found, the balance must be repaired at once by
trained specialized staff (KERN customer service). Never do
repair it by yourself!
Take balance out of operation immediately!
All repairs and spare parts must be documented by the service
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
Components Testing Position
Lock washers
Bolt
Splint
Nut
Lock washers
Chain
Safety bracket
Check for tight fit and for
damage
Check for tight fit and if
deformed
Visual check for
damage and corrosion
Visual check for
damage and corrosion
HFB-BA-e-1212 29
30
250 000 weighings
500 000 weighings
Every 5 years or
anyway after
Every 10 years or
anyway after
Note
During the revision watch out for wear and tear according to the following drawings
(chap. 9.3).
All inspections must be registered in the checklist (chap. 9.4).
All load carrying parts have to be exchanged by trai ned
specialized staff (KERN customer service).
Replace the crane scales entirely
HFB-BA-e-1212
9.3 Checklist „regular maintenance“, (see chapter 9.2)
Original dimensions crane scales, serial no.: ………………………………… Capacity ………………………………
Eyelet Hooks
a (mm) b (mm) Wear and tear c (mm) d (mm)
Date ………………………………… Tester ………………………………………
These data can be found in the document attached to the balance. Please keep this document always available.
Angle α (°)
HFB-BA-e-1212
31
α
Eyelet Hooks Chain
Max. admitted
variation
Revision prior to first
use
3 months / 12 500 x
6 months / 25 000 x
9 months / 37500 x
12 months/ 50 000 x
15 months / 62 500 x
18 months / 75 000 x
21 months / 87 500 x
a b
5 % 0 %
Wear and tear
(see grey fields)
No deformation
or cracks
c d
10
5 %
%
Angle
10 °
Wear and tear
(see grey fields)
No deformation
or cracks
Safety bracket
Perfect working
order
No damage or corrosion
(see grey fields)
Date Tester
HFB-BA-e-1212
32
α
10
Eyelet Hooks Chain
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/150000 x
39 months /162 500 x
42 months /175 000 x
45 months /187 500 x
48 months/200000 x
51 months /212 500 x
54 months /225 000 x
a b
5 % 0 %
Wear and tear
(see grey fields)
No deformation
or cracks
c d
5 %
%
Angle
10 °
Wear and tear
(see grey fields)
No deformation
or cracks
Safety bracket
Perfect working
order
No damage or corrosion
(see grey fields)
Date Tester
57 months /237 500 x
60 months/250000x
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.
HFB-BA-e-1212
33
Eyelet and hook Chain
HFB-BA-e-1212
34
9.4 12-month maintenance (see chap. 9.2)
Tight fit / damage Tight fit / deformation Visual check for damage / corrosion
Lock washers Bolt Split pin Nut Lock washers Chain Safety bracket Date Tester
12 months /
50 000 x
24 months /
100 000 x
36 months /
150 000 x
48 months /
200 000 x
60 months /
250 000x
All load carrying parts have to be exchanged by a service partner authorised by KERN.
HFB-BA-e-1212
35
10. Appendix
10.1 Checklist „Enhanced maintenance“ (General revision)
The enhanced maintenance has to be carried out by a service partner authorized by KERN.
Crane scales Model ………………………………….. 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 crane scales entirely
Hooks Eyelet
Screwed
connections
Date Name Signature
HFB-BA-e-1212
36
10.2 List „spare parts and repair of safety-relevant parts“
Repair has to be carried out by a service partner authorized by KERN.
Crane scales Model ………………………………….. Serial no. ……………………………………………..
Part Action Date Name Signature
HFB-BA-e-1212
37
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