KERN HFC User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Service manual
Electronic Crane Scales
KERN HFC
Version 1.0
10/2015
GB
HFC-SH-e-1510
Importør:
Impex Produkter AS
Gamle Drammensvei 107
1363 Høvik
www.impex.no
[email protected]
Tel.: [phone]

2 HFC-SH-e-1510
GB
KERN HFC
Version 1.0 10/2015
Service manual
Contents
1. Basic Information_______________________________________________4
2. Introdution ____________________________________________________4
3. Technical data _________________________________________________5
3.1 Dimensions __________________________________________________________ 5
4. General Safety Instructions ______________________________________8
4.1 Duties of the owner-operator ___________________________________________ 8
4.2 Organizational measures ______________________________________________ 8
4.3 Environmental conditions ______________________________________________ 8
4.4 Pay attention to the instructions in the Operation Manual ___________________ 9
4.5 Proper use ___________________________________________________________ 9
4.6 Improper Use ________________________________________________________ 9
4.7 Warranty ____________________________________________________________ 9
4.8 Safe working ________________________________________________________ 10
4.9 Monitoring of Test Resources _________________________________________ 10
4.10 Testing upon acceptance _____________________________________________ 10
4.11 Initial Commissioning_________________________________________________ 10
4.12 Shutdown and storage________________________________________________ 10
5. Appliance overview ____________________________________________11
5.1 Overview of display __________________________________________________ 12
5.2 Keyboard overview___________________________________________________ 13
5.3 Label_______________________________________________________________ 14
6. Battery ______________________________________________________15
6.1 Battery / rechargeable battery operation ________________________________ 15
6.2 Accu operation:______________________________________________________ 16
6.3 Suspending the balance ______________________________________________ 18
7. Operation ____________________________________________________19
7.1 Safety instructions ___________________________________________________ 19
7.2 Loading the suspended balance _______________________________________ 20
8. Menu ________________________________________________________23

HFC-SH-e-1510 3
8.1 Navigation in the menu:_______________________________________________ 23
8.2 Overview:___________________________________________________________ 24
9. Adjustment / linearization _______________________________________26
9.1 Adjustment__________________________________________________________ 26
9.2 Linearization ________________________________________________________ 29
10. Cleaning, Maintenance and Disposal______________________________31
10.1 Cleaning and Disposal________________________________________________ 31
10.2 Regular maintenance and care ________________________________________ 32
11. Cleaning, Maintenance and Disposal______________________________33
11.1 Error Codes _________________________________________________________ 33
11.2 Determine the Problem _______________________________________________ 33
11.3 Testing Load cell ____________________________________________________ 34
11.4 Testing PCB Voltages ________________________________________________ 35
11.5 Trouble Shooting ____________________________________________________ 35
12. Drawing______________________________________________________37
12.1 Indicator ____________________________________________________________ 37
12.2 Crane scale：_______________________________________________________ 38

4 HFC-SH-e-1510
1. Basic Information
The device must be repaired only by trained specialist staff or personnel with professional formation
(such as a repair-specialist accredited by law concerning verification). The service manual is
obligatory for repair work. After repair, original conditions of the device have to be restored. Only
original spare parts should be used.
Instructions about conformity-evaluated scales:
Repair must be carried only at 100% compliance with the type approval. A violation of this
specification will result in a loss of the type approval! After successful repair the balance will have to
be reverified before it can be used again in a statutorily regulated field.
Detailed instructions about conformity-evaluated scales:
Repair must be carried only at 100% compliance with the type approval. A violation of this
specification will result in a loss of the type approval!
After successful repair the balance will have to be reverified before it can be used again in a statutorily
regulated field.
2. Introdution
This service manual covers the EOA series and is edited for the authorized servicing personnel.
Note all rights are reserved. Copying any part of this manual is prohibited without our permission.
Notes on operation and setting parameter please refer to the scale corresponding user manual.

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3. Technical data
3.1 Dimensions
Balance 0.6 t / 1 t
Balance 3 t

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Balance 5 t
Balance 10 t

HFC-SH-e-1510 7
Holding strap terminal

8 HFC-SH-e-1510
4. General Safety Instructions
4.1 Duties of the owner-operator
Follow national accident prevention regulations and all operator health and
safety at work and operating regulations.
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 suspended balance is
modified or used improperly and if damage is resulting from such use.
Carry out service and repair to suspended balance crane and lifting tackle at
regular intervals.
Log the test result and keep it in the logbook.
4.2 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.
4.3 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
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. Change location or
remove source of interference.

HFC-SH-e-1510 9
4.4 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.
4.5 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 or of the crane are not
allowed.
4.6 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.
4.7 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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4.8 Safe working
Do not stand under swinging loads
Position the crane in a way that the load is lifted vertically.
When working with the crane and suspended balance wear personal safety
equipment (helmet, safety shoes etc.).
4.9 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.
4.10 Testing upon acceptance
Inspect packaging immediately upon receipt and inspect device when unpacking in
the event of any evident damage.
4.11 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature.
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.
4.12 Shutdown and storage
Remove suspended balance from crane and remove all attachment devices from
the suspended balance.
Do not store suspended balance outdoors.

HFC-SH-e-1510 11
5. Appliance overview
5.1 Rear
Battery or rechargeable battery
compartment
Mains connection

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5.2 Overview of display
Display
Significance
Rechargeable battery capacity
Indicators for weighing with tolerance range
M+
Totalization
STABLE
Stability display
ZERO
Zero indicator
Net
The displayed weighing value is a net weighing value
OZT
Lb
kg
Weighing Units

HFC-SH-e-1510 13
5.3 Keyboard overview
Button
Description of function
Turn on/off balance
Taring
Scroll up/down menu
For numeric entry increase value of digit
Zeroing
Confirm
Switch-over weighing unit
Exit menu / back to weighing mode.
Totalization
Select digits for numeric entry
Change-over button between gross and net weight
Delete total added memory
Delete on numeric entry
Fixing weight display
Displaying peak load value

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5.4 Label
Do not stand or go under suspended loads.
Do not use on building site.
Keep an eye on suspended loads.
(example)
Do not exceed nominal rated load of balance.
The product conforms to the requirements of the
German Equipment and Product Safety Act.

HFC-SH-e-1510 15
6. Battery
6.1 Battery / rechargeable battery operation
Battery operation:
When batteries are empty, will appear on the balance’s display
Press and replace batteries.
Open battery compartment, replace batteries and close battery compartment again.
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.
When the suspended balance is out of operation for a longer period, remove the
batteries.
Unscrew battery / rechargeable battery
compartment in the direction of the
arrow.
Replace batteries and relock battery /
rechargeable battery compartment.

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6.2 Accu operation:
When the rechargeable battery is empty, appears on the balance’s display.
Turn off balance and connect power supply unit; battery is charged.
Once the battery has been fully charged the display will show the symbol.
Insert rechargeable battery:
Unscrew battery compartment in arrow
direction.
Remove batteries including battery
mount from the device.

HFC-SH-e-1510 17
Connect cable of balance to battery
cable as shown on image.
Insert battery in the centre.
Ensure that the cables are not kinked.
Relock battery compartment.

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6.3 Suspending the balance
Condition
The crane needs a safety bracket (1) that the unloaded suspended balance 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.
Attach the suspended balance to the lower hook of a crane and close the safety
bracket.
The crane scale’s upper eyelet should rest in the saddle (2).

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7. Operation
7.1 Safety instructions
DANGER
Risk of injury due to falling loads!
Take great care when operating the crane and follow the
general rules for crane operation.
Check all parts (hook, carbines, rings, rope slings,
cables, chains etc.) for excessive wear or damage
If faults can be seen on the safety bracket of the crane
hook or if it is missing completely, the scales must not
be used.
Work only with appropriate speed
Always avoid vibrations and horizontal forces. Avoid
any kind of shock, torsion and oscillating (e.g. caused
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.
(example)
Do not exceed nominal rated load of crane, suspended
balance or any kind of attachment device on the
suspended balance.

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7.2 Loading the suspended balance
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 suspended balance over the load.
2. Move downwards the suspended balance 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. Attach load to attachment device. Ensure that all safety-relevant devices are
functional (e.g. the safety latch 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