KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Operating instructions
Electronic Crane Scales
Logbook
Regular maintenance and care
KERN HFM
Version 1.1
09/2010
GB
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
HFM-BA-e-1011
GB
KERN HFM
Version 1.1 09/2010
Operating instructions / logbook
Electronic Suspending Balance
Table of Contents
1. Technical Data______________________________________________________________ 3
1.1 Dimensions (mm) ____________________________________________________________ 4
2. General Safety Instructions ___________________________________________________ 5
3. The crane scales at a glance __________________________________________________ 8
3.1 Overview___________________________________________________________________ 8
3.2 Display ____________________________________________________________________ 9
3.3 Keyboard___________________________________________________________________ 9
3.3.1 Numeric entry ______________________________________________________________ 10
3.4 Radio remote control_________________________________________________________ 10
3.5 Sticker____________________________________________________________________ 11
4. Commissioning ____________________________________________________________ 12
4.1 Unpacking_________________________________________________________________ 12
4.2 Checking the original dimensions _______________________________________________ 12
4.3 Rechargeable battery operation ________________________________________________ 13
4.3.1 Standby mode______________________________________________________________ 13
4.4 Suspending the balance ______________________________________________________ 14
5. Operation_________________________________________________________________ 15
5.1 Safety instructions___________________________________________________________ 15
5.2 Loading the crane scales _____________________________________________________ 16
5.3 Turn on/off_________________________________________________________________ 19
5.4 Setting balance to zero _______________________________________________________ 19
5.5 Taring ____________________________________________________________________ 20
5.6 Weighing__________________________________________________________________ 20
5.7 Record weight value (freeze) __________________________________________________ 20
6. Menu ____________________________________________________________________ 21
7. Adjustment _______________________________________________________________ 23
8. Error messages____________________________________________________________ 24
9. Cleaning, Maintenance and Disposal __________________________________________ 25
9.1 Cleaning and Disposal _______________________________________________________ 25
9.2 Regular maintenance and care_________________________________________________ 25
9.3 Checklist „Regular maintenance“, (see chapter 9.2)_________________________________ 27
10. Appendix _________________________________________________________________ 30
10.1 Checklist „Enhanced maintenance“ (General revision)_______________________________ 30
10.2 List „spare parts and repair of safety-relevant parts“ ________________________________ 31
2
HFM-BA-e-1011
1. Technical Data
KERN HFM 1T0.1 HFM 3T0.5 HFM 5T0.5 HFM 10T1
Readability (d) 0.1 kg 0.5 kg 0.5 kg 1 kg
Weighing range (max) 1 000 kg 3 000 kg 5 000 kg 10 000 kg
Taring range (subtractive) 1 000 kg 3 000 kg 5 000 kg 10 000 kg
Reproducibility 500 g 1 kg 2.5 kg 5 kg
Linearity ±1 kg ±2 kg ±5 kg ±10 kg
Recommended adjustment
weight, not added (class)
Stabilization time 2 s
Precision 0.2 % of max.
Warm-up time 30 min
Unit kg
Allowable ambient
temperature
Relative humidity 0 to 80 %, non-condensing
Supply voltage 220V - 240V AC 50 Hz
Secondary voltage
powerpack
Rechargeable battery
(standard equipment)
1 t (M1) 3 t (M1) 5 t (M1) 10 t (M1)
0…+40 °C
9V, 800 mA
6 V 1.2 A
Service life 60 h
Loading time 24 h
Display Digit height 30 mm
Housing size W x D x H,
(mm)
Housing material Metal, lacquered
Material hook and shackle Nickel plated steel
Net weight (kg) 16 18 23 35
Remote control (standard
equipment)
HFM-BA-e-1011 3
270 x 175 x 200 300 x 190 x 230
Battery Size 23A (1 x 1.5V)
W x D x H 48 x 16 x 95 mm
1.1 Dimensions (mm)
HFM 1T0.1 270 173 200 40 98 285 51 68 25 540
HFM 3T0.5 270 173 200 40 95 540 63.5 74 29 610
HFM 5T0.5 297 185 230 55 95 635 63.5 74 29 700
HFM 10T1 297 185 230 60 110 750 76.2 92 35 840
A B C D F H
∅ 1 ∅ 2 ∅ 3
X
4
HFM-BA-e-1011
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 protected.
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-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 operate the crane scales in corrosive environment.
Protect the crane scales against high humidity, vapours and dust.
HFM-BA-e-1011 5
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.
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 devices
- 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 use
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
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.).
6
HFM-BA-e-1011
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
HFM-BA-e-1011 7
3. The crane scales at a glance
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: Front view of balance Fig. 2: Radio remote control
1 Shackle 6 Antenna
2 Display 7
3 Keyboard
4 Safety bracket
5 Hook, revolvable
8
Keyboard,
see chapter 3.5
HFM-BA-e-1011
3.2 Display
LED The LED lights up, if
a
3.3 Keyboard
Button Description of function
ON/OFF
the weight display is stable
the weight is in the area around the zero point
when the battery is being recharged
• Turn on or off the balance
• Modification of readability
HFM 1T0.1: 100gÖ200gÖ500g
HFM 3T0.5: 500gÖ 1 kgÖ2 kg
HFM 5T0.5: 500gÖ 1 kgÖ2 kg
HFM 10T1: 1 kg Ö 2 kgÖ5 kg
• Scroll forward in menu
• Record weight value (freeze)
HOLD
• Exit menu
• Taring
a
• Zeroing
• Confirm entry
HFM-BA-e-1011 9
3.3.1 Numeric entry
Button Function
Increase flashing digit
HOLD
a
3.4 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.
Digit selection
Terminate input
1
2
Standby-Modus, see chapter 4.3.1
Zeroing / Taring
3
4
Modification of readability
Record weight value (freeze)
10
HFM-BA-e-1011
3.5 Sticker
(Example)
Ö Do not stand or go under suspended loads.
Ö Do not use on building sites.
Ö Suspended loads have to be observed constantly.
Ö Do not exceed the nominal load of crane scales.
Ö The product meets the requirements of the German
Equipment and Product Safety Act.
HFM-BA-e-1011 11
4. Commissioning
Attention: Always observe chapter 2 „General Safety Instructions“!
4.1 Unpacking
Once delivered and unpacked, crane scales will not be
taken back.
SAFETY
INSTRUCTIONS
for protection against
The crane scales have been sealed by Messrs. KERN.
Ö Shackles and hooks are sealed by Sella tape.
Ö The packaging is also sealed by adhesive tape.
break
+ Broken seal obliges to purchase.
Thanks for your comprehension.
Your KERN Quality assurance team
The crane scales are compact and quite heavy.
Ö Remove the scales from packaging only with the help of
a second person.
CAUTION
Danger for the back!
Ö Use a lifting device such as a crane or a forklift truck.
Ö Secure the scales that they cannot fall down when they
are lifted.
Ö Make sure that all parts are completely present.
• Crane scales
• Mains adapter
• Remote control
• Operating instructions (logbook)
Only use original packaging for returning.
4.2 Checking the original dimensions
Ö Enter the original dimensions of the product datasheet into the grey fields of the
checklist chap. 9.3.
Ö Realisation of all safety checks, see chapter 9.2 „Regular maintenance after three
months“
Ö 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 authorised by Messrs. KERN.
CAUTION
12
HFM-BA-e-1011
4.3 Rechargeable battery operation
Material damage on crane scales
Ö Only use the delivered mains adapter.
Ö Make sure that the mains adapter, the cable and the
CAUTION
mains plug are in a perfect condition.
Ö 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 24 hours. The operating time of the rechargeable
battery is approx. 60 hours.
The capacity of the rechargeable battery will soon be exhausted, when the display
begins to flicker. If „bat lo“ appears, the balance will remain operable for approx. 30
minutes more, then it switches off automatically. Connect the power cable as soon as
possible to load the rechargeable battery.
During loading the LED display above informs you about the loading status of the
rechargeable battery.
red: Voltage has dropped below prescribed minimum.
green: Rechargeable battery is completely charged
yellow: Capacity of rechargeable battery almost exhausted
When the crane scales are out of operation for a longer period, remove the
rechargeable battery.
4.3.1 Standby mode
The crane scales change into the standby mode when any key is pressed or when
for 5 minutes (factory setting) no weight change has been measured. Only one
segment remains lighting. In order to finish the standby mode, press any key on the
keyboard or on the remote control.
Switch-off time selectable after 0, 5, 10, 20, 30 minutes, see chap. „F6 sl“.
HFM-BA-e-1011 13
4.4 Suspending the balance
1
2
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.
Ö 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).
14
HFM-BA-e-1011
5. Operation
5.1 Safety instructions
DANGER
Ö Always work with particular care according to the general
Ö Check all parts (hook, eyelet, rings, rope slings, cables,
Ö If faults can be seen on the safety bracket of the hook
Ö Work only with appropriate speed.
Ö Always avoid vibrations and horizontal forces. Avoid
Risk of injury due to falling loads!
rules for crane operation.
chains etc.) for excessive wear or damage
or if it is missing completely, the scales must not be
used.
any kind of shock, torsion and oscillating (e.g. caused
by inclined suspending).
Ö Do not use the crane scales for transport of loads
Ö Do not stand or go under suspended loads.
Ö Do not use on building sites.
Ö Suspended loads have to be observed constantly.
Ö Do not exceed the nominal load of crane, crane scales
or any kind of load attachment devices at the crane
scales.
(Example)
HFM-BA-e-1011 15
5.2 Loading the crane scales
For good weighing results observe the following, illustrations see next page:
Ö Only use load attachment devices which guarantee a one-spot suspension and
where the scales can be suspended freely.
Ö Do not use too large load attachment devices which do not guarantee any one-
spot suspension.
Ö Do not use multiple suspensions.
Ö Do not pull or push the load or the loaded balance.
Ö 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
16
HFM-BA-e-1011
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.
HFM-BA-e-1011 17
Do not push or pull
Do not pull the hook horizontally
18
Do not use multiple suspensions
HFM-BA-e-1011
5.3 Turn on/off
Start-up
Ö 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
Ö Press the ON/OFF button on the balance keyboard.
5.4 Setting balance to zero
In order to obtain optimal weighing results, reset to zero the balance before weighing.
Manual
Ö Unload the balance
Ö Press the ZERO button.
In the display appears 0 (kg) and the LED a lights up.
Automatic
In the menu the amount of the automatic zero point correction can be changed,
see chapter 6 / Function „F1 az“.
HFM-BA-e-1011 19
5.5 Taring
Ö Suspend preload.
Press the ZERO button. In the display appears 0 (kg) and the LED a lights
up. The weight of the container is now internally saved.
Ö Weigh the material, the net weight will be indicated.
Ö After removing the preload weight appears as negative display.
Ö To delete the tare value, remove load from crane scales and press the ZERO
button.
5.6 Weighing
Ö Load the crane scales.
The weight value will be displayed at once. After standstill control the LED
lights up.
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 preload.
5.7 Record weight value (freeze)
Ö Press the HOLD button to „freeze“ or to record the current weight value.
It remains displayed until it is deleted. The LED HOLD lights up
Ö In order to delete the "frozen" or the recorded weight, press the HOLD button.
The LED HOLD extinguishes.
20
HFM-BA-e-1011
6. Menu
Navigation in the menu:
Call function
Select function
Select setting
Ö Switch on the balance and during the selftest press the
ZERO and the button at the same time.
„P1 - - - “is displayed.
Ö Enter password:
or
select standard password „0000“ with HOLD number,
increase the flashing number using
or
personal password, see function F8 ci
Ö Confirm with ZERO button.
The first function „F0 di“ is displayed.
Ö The button allows to select the individual
functions one after the other.
Ö Confirm the selected function by the ZERO button. The
current setting will be displayed.
Change settings
Confirm setting
Exit menu / Return to
weighing mode
Ö Use the button to switch over into the
available settings.
Ö Press the ZERO button, the balance returns into the
menu.
Ö Press the HOLD button.
HFM-BA-e-1011 21
Overview:
Function
Available
settings
Description
F0 di
Modification of readability
F1 az
Automatic zero point
correction
(zero tracking)
F2 bt
Low
High*
cap
d (low)
1 t 2kg 1kg 500g 500g 200g 100g
3 t 10kg 5kg 2kg 2kg 1kg 500g
5 t 10kg 5kg 2kg 2kg 1kg 500g
10 t 20kg 10kg 5kg 5kg 2kg 1kg
AZn 0 0.5 d
AZn 1* 1 d
AZn 2 2 d
AZn 3 4 d
Not documented
d (high)
specialist with competent knowledge.
Modifications may only be carried out by a
F3 sp
F4 ip
F5 ut Not documented
F6 sl
Standby mode
see chap. 4.3.1
F7 gv Not documented
F8 ci
Password entry
F9 CL Adjustment, see chapter 7
* = default setting
Not documented
Internal A/D converter value
SLP 0 Standby mode switched off
SLP 1* Standby mode after 5 minutes
SLP 2 Standby mode after 10 minutes
SLP 3 Standby mode after 20 minutes
SLP 4 Standby mode after 30 minutes
In „P1- - - “ display increase the flashing number using
, select number using HOLD. Confirm entry by
ZERO button.
22
HFM-BA-e-1011
7. Adjustment
Ö Switch-off balance and attach a carrying help if necessary.
Ö Switch-on balance with attached carrying help and during the selftest press the
ZERO and the button at the same time. „P1 - - - “is displayed.
Ö Use the number keys to enter password:
or
select standard password „0000“ with HOLD number, increase the flashing
number using
or
personal password, see function F8 ci
Ö Confirm with ZERO button, the first function „F0 di“ is displayed.
Ö Press the button repeatedly until „F9 CAL“ will be displayed.
Ö Press the ZERO button, „UnLD“ will be displayed.
Ö Unload the balance and wait until the LED lights up.
Ö Press the ZERO button, the currently set adjustment weight is displayed.
Ö In order to change, select the number to be changed using the HOLD button and
set the desired value using the button, the respective active digit
flashes.
Ö Confirm by the ZERO button, „Load“ will be displayed.
Ö Attach the adjustment weight and wait until the LED lights up.
Ö Press the ZERO button.
Ö 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
HFM-BA-e-1011 23
8. Error messages
Error
message
--ol-
Description Possible causes
Maximum load exceeded
Ö Reduce load
Ö Check whether the balance has
been damaged
Err 5
Err 6
Ba lo
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
Keyboard error
Value outside the A/D changer
range
Capacity of rechargeable
battery exhausted
Ö Improper operation of the balance
Ö Weighing plate not installed
Ö Damaged weighing cell
Ö Damaged electronics
Ö Recharge battery
24
HFM-BA-e-1011
9. Cleaning, Maintenance and Disposal
Danger
9.1 Cleaning 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:
Ö Have carried out a regular maintenance by trained specialized
staff
Ö Carry out regular maintenance and care, see chapter 9.2 and 9.3
Ö Have the parts exchanged only by trained specialized staff.
Ö If there arose discrepancies with the safety checklist, the balance
must not more be put into operation.
Ö 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!
Ö Do not use any industrial solutions or chemicals
CAUTION
Ö Clean the keyboard and the display with a soft cloth soaked in mild window
cleaning agent.
Ö 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
S 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.
S To check the dimensions only use suitable test devices.
S The regular 12-month maintenance must only be carried out by trained
specialized staff (KERN customer service).
S The results of the maintenance must be written down in the checklist (chap. 9.3).
S The additional results of the extended maintenance have to be entered in the
checklist (chapter 10.1).
S The replaced spare parts also must be entered, (chapter 10.2)
HFM-BA-e-1011 25
Regular maintenance:
Initial
Commissioning,
every 3 months or
anyway after
12 500 weighings
Every 12 months or
in any case after
50 000 weighings
Check all dimensions, see checklist chap. 9.2
Check the shackle or the eyelet for wear and tear, such as
e.g. plastic deformation, mechanical damage (unevenness),
notches, striation, cracks, corrosion, thread damage and
torsions.
Check the application of the safety bracket on the hook,
moreover check for fault and correct function
For balances of big construction size: Check that the split pin
and the nut on the shackle are not loose
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
partner (see list, chap. 10.2).
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
Every 5 years or
anyway after
250 000 weighings
Every 10 years or
anyway after
500 000 weighings
Note
During the revision watch out for wear and tear according to the following drawings
(chap. 9.3).
All load carrying parts have to be exchanged by trained
specialized staff (KERN customer service).
Replace the crane scales entirely
26
HFM-BA-e-1011
9.3 Checklist „Regular maintenance“, (see chapter 9.2)
Original dimensions crane scales, serial no.: ………………………………… Capacity ………………………………
Shackle Hooks
a (mm) b (mm) c (mm) Wear and
Split pin&Nut d (mm) e (mm) f (mm) g (mm)
Angle α (°)
Wear and tear Safety bracket
tear
Date ………………………………… Tester ………………………………………
Shackle Hooks
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
a b c
5 % 0 % 5 %
Wear and tear (see
grey fields)
No deformation or
cracks
Split
pin&Nut
tight
d e) f g
10 % 5 % 5 % 5 %
Angle α
10 °
Wear and tear
(see grey fields)
No deformation or
cracks
Safety
bracket
Perfect
working
order
Date Tester
18 months / 75 000 x
21 months / 87 500 x
HFM-BA-e-1011 27
Max. admitted variation
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
42 months / 175 000 x
45 months / 187 500 x
48 months/200 000
Shackle Hooks
a b c
5 % 0 % 5 %
Wear and tear (see
grey fields)
No deformation or
cracks
Split
pin&Nut
tight
d e) f g
10 % 5 % 5 % 5 %
Angle α
10 °
Wear and tear
(see grey fields)
No deformation or
cracks
Safety
bracket
Perfect
working
order
Date Tester
51 months / 212 500 x
54 months / 225 000 x
57 months / 237 500 x
60 months/250 000x
Î All load carrying parts have to be exchanged by a service partner authorized by KERN.
bold letters = this maintenance work has to be carried out by a service partner authorized by KERN.
HFM-BA-e-1011 28
HFM-BA-e-1011 29
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
Magnetic powder
test for cracks
Hooks Shackle
Screwed
connections
Date Name Signature
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
Î Replace crane scales entirely
HFM-BA-e-1011 30
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
HFM-BA-e-1011 31
Crane scales
Model ………………………………….. Serial no. ……………………………………………..
Part Action Date Name Signature
HFM-BA-e-1011 32
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