KERN HFT 3T0.5 User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating manual
Electronic Crane Scales
Logbook
Regular maintenance and care
KERN HFT
Version 1.2
2018-04
GB
HFT-BA-e-1812
Importør:
Impex Produkter AS
Gamle Drammensvei 107
1363 Høvik
www.impex.no
[email protected]
Tel.: [phone]

2 HFT-BA-e-1812
GB
KERN HFT
Version 1.2 2018-04
Operating instructions / logbook
Electronic Crane Scales
Contents
1Technical data _________________________________________________4
1.1 Dimensions balance (mm) ______________________________________________________ 5
1.2 Dimensions display unit (mm) ___________________________________________________ 6
1.3 Nameplate __________________________________________________________________ 7
1.4 EC-Declaration of -Conformity___________________________________________________ 8
2General Safety Instructions ______________________________________9
2.1 Duties of the owner-operator ____________________________________________________ 9
2.2 Organizational measures_______________________________________________________ 9
2.3 Pay attention to the instructions in the Operation Manual______________________________ 9
2.4 Environmental conditions______________________________________________________ 10
2.5 Proper use _________________________________________________________________ 10
2.6 Improper Use _______________________________________________________________ 10
2.7 Warranty___________________________________________________________________ 11
2.8 Safe working _______________________________________________________________ 11
2.9 Monitoring of Test Resources __________________________________________________ 11
2.10 Testing upon acceptance______________________________________________________ 11
2.11 Initial Commissioning_________________________________________________________ 11
2.12 Shutdown and storage________________________________________________________ 11
3The crane scales at a glance ____________________________________12
3.1 Appliance overview crane scale_________________________________________________ 12
3.2 Appliance overview display unit_________________________________________________ 13
3.3 Overview of display __________________________________________________________ 14
3.4 Keyboard overview___________________________________________________________ 15
3.5 Numerical input via the navigation buttons ________________________________________ 16
3.6 Label______________________________________________________________________ 16
4Commissioning _______________________________________________17
4.1 Unpacking _________________________________________________________________ 17
4.2 Checking the original dimensions _______________________________________________ 17
4.3 Rechargeable battery operation_________________________________________________ 18
4.4 Suspending the balance_______________________________________________________ 19
5Operation ____________________________________________________20
5.1 Safety instructions ___________________________________________________________ 20
5.2 Loading the crane scales______________________________________________________ 21
5.3 Turn on/off _________________________________________________________________ 24
5.4 Set balance to zero __________________________________________________________ 24
5.5 Taring_____________________________________________________________________ 25
5.6 Weighing __________________________________________________________________ 25
5.7 Fix the weight value (Data-HOLD function) ________________________________________ 26

HFT-BA-e-1812 3
5.8 Weighing Units______________________________________________________________ 26
5.9 Totalization_________________________________________________________________ 28
5.10 Automatische Nullpunktkorrektur________________________________________________ 31
6Menu ________________________________________________________32
6.1 Navigation in the menu: _______________________________________________________ 32
6.2 Menu overview______________________________________________________________ 33
7Adjustment___________________________________________________35
8Data output RS 232 ____________________________________________37
8.1 Technical data ______________________________________________________________ 37
8.2 Technical data ______________________________________________________________ 37
8.3 Continuous data output _______________________________________________________ 37
8.4 Printer mode________________________________________________________________ 38
9Error messages _______________________________________________39
10 Cleaning, Repair, Maintenance and Disposal _______________________40
10.1 Cleaning and Disposal________________________________________________________ 40
10.2 Regular maintenance and care _________________________________________________ 41
10.3 Regular maintenance_________________________________________________________ 41
10.4 Checklist „Regular maintenance“, (see chapter 10.3) ________________________________ 42
11 Enclosure ____________________________________________________45
11.1 Checklist „Enhanced maintenance“ (General revision) _______________________________ 45
11.2 List „spare parts and repair of safety-relevant parts“_________________________________ 46

4 HFT-BA-e-1812
1 Technical data
KERN HFT 3T0.5 HFT 5T1 HFT 10T2 HFT 15T5
Readability (d) 0.5 kg 1 kg 2 kg 5 kg
Weighing range (max) 3 000 kg 5 000 kg 10 000 kg 15 000 kg
Taring range (subtractive) 3 000 kg 5 000 kg 10 000 kg 15 000 kg
Reproducibility 500 g 1 kg 2 kg 5 kg
Linearity ± 1 kg ± 2 kg ± 4 kg ± 10 kg
Recommended adjustment
weight, not added (class) 3 t (M3) 5 t (M3) 10 t (M3) 15 t (M3)
Stabilization time 2 s
Precision 0.2 % of max.
Warm-up time 30 min 10 min 10 min 10 min
Unit kg, lb
Allowable ambient
temperature 0…+40 °C
Relative humidity 0 to 80 %, non-condensing
Input Voltage 220V -240V AC 50 Hz
Secondary voltage powerpack 12V, 500 mA
Rechargeable battery
(standard equipment)
6 V, 4 Ah
Service life (background illumination OFF) 35 h
Loading time 12 h
Display Digit height 22 mm
Dimensions display unit
W x D x H, (mm) 175 x 84 x 39
Dimensions, completely
assembled
W x D x H, (mm)
130x650x130
160x760x160
180x870x180
180x870x180
Housing material Chromatized steel
Material of display unit Plastic
Net weight (kg) 87

HFT-BA-e-1812 5
1.1 Dimensions balance (mm)
Model A B C D E
HFT 3T0.5 43 28 606 650 130
HFT 5T1 58 40 693 760 160
HFT 10T2 83 51 781 870 180
HFT 15T5 99 57 842 950 180

6 HFT-BA-e-1812
Model a b c d e f g
HFT 3T0.5 16 42.9 19.1 27.5 28 16 31
HFT 5T1 22.4 57.9 25.4 40 45 31 51
HFT 10T2 31.8 82.6 35.1 51 57 30 62
HFT 15T5 38.1 98.6 41.4 57 70 30 73
1.2 Dimensions display unit (mm)

HFT-BA-e-1812 7
1.3 Nameplate
1 KERN Logo
2
Model designation
3 Weighing range [Max]
4 Data for power supply
5 Company address
6 Readability [d]
7 Date of manufacture
8 CE mark
9 Disposal symbol
0 Serial number

8 HFT-BA-e-1812
1.4 EC-Declaration of -Conformity
KERN & Sohn GmbH
www.kern-sohn.com
Ziegelei 1
72336 Balingen-Frommern
Germany
+0049-[0]7433-9933-0
+0049-[0]7433-9933-149
[e-mail]
Déclaration de conformité UE | EU Declaration of Conformity | EU-Konformitätserklärung
FR Nous déclarons par la présente sous notre entière responsabilité que le produit concerné par cette
déclaration respecte les exigences des directives mentionnées ci-après.
EN We hereby declare and assume sole responsibility for the declaration that the product complies with the
directives hereinafter.
DE Wir erklären hiermit unter alleiniger Verantwortung, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Richtlinien übereinstimmt.
Type | Type | Typ
Nº de série | Serial no. | Seriennr.
HFT 3T0.5
HFT 5T1
HFT 10T2
HFT 15T5
xxxxxxxxxx
Marquage CE
Mark applied
CE Kennzeichnung
Directive UE
EU directive
EU-Richtlinie
Normes
Standards
Normen
2006/42/EC
(MD) EN 13155:2003/A2:2009
2014/30/EU
(EMC) EN 50581:2012
2014/35/EU
(LVD)
EN 55022:2010
EN 55024:2010
EN 61000-3-3:2013
Date | Date | Datum:
29.08.2016
Lieu de délivrance:
Place of issue:
Ort der Ausstellung:
72336 Balingen,
Germany
Albert Sauter
KERN & Sohn GmbH
Signature:
Signature:
Signatur:
Directeur Exécutif
Managing director
Geschäftsführer
Further language versions you will find online under:
www.kern-sohn.com/ce

HFT-BA-e-1812 9
2 General Safety Instructions
2.1 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 crane scales are modified or
used improperly and if damage is resulting from such use.
•Inspect and service crane balance, crane and load suspension devices regularly
(see chap. 10.3).
•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
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. 11.2).
•All maintenance must be documented (see checklist chap. 11.1).
•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
11.1).
2.3 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.

10 HFT-BA-e-1812
2.4 Environmental 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.
•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.
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 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.
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.

HFT-BA-e-1812 11
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
2.8 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.).
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
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible 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. 4.2
2.12 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

12 HFT-BA-e-1812
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.
3.1 Appliance overview crane scale
1 Shackle
2 Housing cover
3
Hooks
4 Safety bracket
5 Antenna

HFT-BA-e-1812 13
3.2 Appliance overview display unit
Front view display unit (receiver):
1. Antenna
2. Battery charge status
3. Weight display
4. Keyboard
Back view display unit (receiver):
5. RS-232
6. Mains adapter
connection
7. Table leg

14 HFT-BA-e-1812
3.3 Overview of display
Display Significance
Charging status of rechargeable battery
Radio communication between display unit and crane scale
STABLE Stability display
ZERO Zero indicator
M+ Totalization
HOLD HOLD function

HFT-BA-e-1812 15
3.4 Keyboard overview
Button Function
•Turn on/off
•With a weight value >10% Max. the button function is
Taring
•With a weight value <10% Max. the button function is
Zero setting
Navigation •Confirm entry
•Short-time increase of the resolution
Navigation •At numeric input increase flashing digit
•Scroll forward in menu
•Hold function / determination of a mean value
•In adjustment process: Change decimal digit
Navigation •Digit selection to the right
•Add weighing value to summation memory
•Display sum total
•Calculate weighing data via interface
•Delete
Navigation button •Digit selection to the left
•Switch-over weighing unit
•Back to menu/weighing mode

16 HFT-BA-e-1812
3.5 Numerical input via the navigation buttons
Button
Navigation
Function
Increase flashing digit
Digit selection to the left
Delete
Digit selection to the right
Confirm
3.6 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 load of crane scales.
The product conforms to the requirements of the
German Equipment and Product Safety Act.

HFT-BA-e-1812 17
4 Commissioning
Attention: Always observe chapter 2 „General Safety Instructions“!
4.1 Unpacking
SAFETY
INSTRUCTIONS
for protection against
break
Once delivered and unpacked, crane scales will not be
taken back.
The crane scales have been sealed by Messrs. KERN.
Shackles and hooks are sealed by Sella tape.
The packaging is also sealed by adhesive tape.
+Broken seal obliges to purchase.
Thanks for your comprehension.
Your KERN Quality assurance team
Danger for the back!
The crane scales are compact and quite heavy.
Remove the scales from packaging only with the help of
a second person.
Use a lifting device such as a crane or a forklift truck.
Secure the scales that they cannot fall down when they
are lifted.
Only use original packaging for returning.
Make sure that all parts are completely present:
•Crane scales
•Display Unit
•Cable screwing „Interface cable“
•2 x mains adapter
•Operating instructions (logbook)
4.2 Checking the original dimensions
Enter the original dimensions shown on the production data sheet in the grey
boxes of checklist chap. 10.4.
Check original dimension of crane scales; for implementation see chap. 10.3
„Regular Maintenance“
Enter all data (date, tester, results) in the first line under „Inspection before first
use“ in the checklist (see chapter 10.4)
CAUTION
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.

18 HFT-BA-e-1812
4.3 Rechargeable battery operation
Crane scales:
CAUTION
Material damage on crane scales
Only use the delivered mains adapter.
Make sure that the mains adapter, the cable and the
mains plug are in a perfect condition.
Do not use the crane scales during the loading process.
1
ON/OFF switch
2
LED „Battery charging status“
3
LED „rechargeable battery is
charged“
4
Mains connection
Before the first use, the rechargeable battery should be charged by connecting it to
the mains power cable for at least 12 hours. For loading the rechargeable battery
please only use the delivered mains adapter. The operating time of the rechargeable
battery is approx. 35 hours.
•If the LED display (2) next to the mains connection (4) is illuminated, the
battery should be recharged.
•LED (3) is illuminated during the battery loading.
Display Unit
Before the first use, the battery should be charged byconnecting it to themainspower supply
for at least 12 hours. The appearance of the rechargeable battery symbol in the weight display
indicates that the battery is almost exhausted. The unit will be ready for operation for approx.
another10 hours before switching off automatically. Charge the battery with the help of the
supplied power pack.
The rechargeable battery symbol shows the charge status of the rechargeable battery:
Voltage has dropped below prescribed minimum.
Rechargeable battery very low.
Rechargeable battery completely reloaded

HFT-BA-e-1812 19
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).

20 HFT-BA-e-1812
5 Operation
5.1 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, eyelet, rings, rope slings, cables,
chains etc.) for excessive wear or damage

If faults can be seen on the safety bracket of the 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 crane scales for transporting 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 the nominal load of crane, crane scales
or any kind of load attachment devices at the crane
scales.
For weighing dangerous goods (e.g molten masses,
radioactive materials) the “Dangerous Goods
Regulations” are to be regarded!