KERN & SOHN HFT 15T5 User Manual
KERN & Sohn GmbH
Ziegelei 1
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Internet: www.kern-sohn.com
Operating manual
Electronic Crane Scales
Logbook
Regular maintenance and care
KERN HFT
Version 1.0
11/2013
GB
D-72336 Balingen
Fax: +49-[0]7433-9933-149
HFT-BA-e-1310
GB
KERN HFT
Electronic Crane Scales
Version 1.0 11/2013
Operating instructi ons / l ogbook
Contents
1 Technical data _________________________________________________ 4
1.1 Dimensions balance (mm) ___________________________________________________________ 5
1.2 Dimensions display unit (mm) ________________________________________________________ 6
2 General Safety Instructions ______________________________________ 7
2.1 Duties of the owner-operator _________________________________________________________ 7
2.2 Organizational measures ____________________________________________________________ 7
2.3 Pay attention to the instructions in the Operation Manual _________________________________ 7
2.4 Environmental conditions ____________________________________________________________ 8
2.5 Proper use ________________________________________________________________________ 8
2.6 Improper Use ______________________________________________________________________ 8
2.7 Warranty __________________________________________________________________________ 9
2.8 Safe working_______________________________________________________________________ 9
2.9 Monitoring of Test Resources ________________________________________________________ 9
2.10 Testing upon acceptance ____________________________________________________________ 9
2.11 Initial Commissioning _______________________________________________________________ 9
2.12 Shutdown and storage ______________________________________________________________ 9
3 The crane scales at a glance ____________________________________ 10
3.1 Appliance overview crane scale _____________________________________________________ 10
3.2 Appliance overvi e w display unit _____________________________________________________ 11
3.3 Overview of display ________________________________________________________________ 12
3.4 Keyboard overview ________________________________________________________________ 13
3.5 Numerical input via the navigation buttons ____________________________________________ 14
3.6 Label ____________________________________________________________________________ 14
4 Commissioning _______________________________________________ 15
4.1 Unpacking ________________________________________________________________________ 15
4.2 Checking the original dimensions ____________________________________________________ 15
4.3 Rechargeable battery operation _____________________________________________________ 16
4.4 Suspending the balanc e ____________________________________________________________ 17
5 Operation ____________________________________________________ 18
2 HFT-BA-e-1310
5.1 Safety instructions _________________________________________________________________ 18
5.2 Loading the crane scales ___________________________________________________________ 19
5.3 Turn on/off _______________________________________________________________________ 22
5.4 Set balance to zero ________________________________________________________________ 22
5.5 Taring ___________________________________________________________________________ 23
5.6 Weighing _________________________________________________________________________ 23
5.7 Fix the weight value (Data-HOLD function) ____________________________________________ 24
5.8 Weighing Units ____________________________________________________________________ 24
5.9 Totalization _______________________________________________________________________ 26
5.10 Automatische Nullpunktkorrektur ____________________________________________________ 29
6 Menu ________________________________________________________ 30
6.1 Navigation in the menu: ____________________________________________________________ 30
6.2 Menu overview ____________________________________________________________________ 31
7 Adjustment ___________________________________________________ 33
8 Data output RS 232 ____________________________________________ 35
8.1 Technical data ____________________________________________________________________ 35
8.2 Technical data ____________________________________________________________________ 35
8.3 Continuous data output ____________________________________________________________ 35
8.4 Printer mode ______________________________________________________________________ 36
9 Error messages _______________________________________________ 37
10 Cleaning, Maintenance and Disposal ______________________________ 38
10.1 Cleaning and Disposal _____________________________________________________________ 38
10.2 Regular maintenance and care ______________________________________________________ 39
10.3 Regular maintenance ______________________________________________________________ 39
10.4 Checklist „regular maintenance“, (see chapter 10.3) ____________________________________ 40
11 Enclosure ____________________________________________________ 43
11.1 Checklist „Enhanced maintenance“ (General revision) __________________________________ 43
11.2 List „spare parts and repair of safety-relevant parts“ ____________________________________ 44
HFT-BA-e-1310 3
1 Technical data
Loading time 12 h
Dimensions, completely
W x D x H, (mm)
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)
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
Relative humidity 0 to 80 %, non-condensing
Input Voltage 220V - 240V AC 50 Hz
Secondary voltage powerpack 12V, 500 mA
Rechargeable battery
(standard equipment)
Display Digit height 22 mm
3 t (M3) 5 t (M3) 10 t (M3) 15 t (M3)
0…+40 °C
6 V, 4 Ah
Service life (background illumination OFF) 35 h
Dimensions display unit
W x D x H, (mm)
assembled
Housing material Chromatized steel
Material of display unit Plastic
Net weight (kg) 87
4 HFT-BA-e-1310
175 x 84 x 39
130x650x130 160x760x160 180x870x180 180x870x180
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
HFT-BA-e-1310 5
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)
6 HFT-BA-e-1310
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 instruct ed 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 instru ctions 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.
HFT-BA-e-1310 7
2.4 Environmental 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-permitted cond ensation
(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.
8 HFT-BA-e-1310
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
HFT-BA-e-1310 9
3 The crane scales at a glance
3
Hooks
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
4 Safety bracket
5 Antenna
10 HFT-BA-e-1310
3.2 Appliance overview display unit
Front view display unit (receiver):
Back view display unit (receiver):
1. Antenna
2. Battery charge status
3. Weight display
4. Keyboard
5. RS-232
6. Mains adapter
connection
7. Table leg
HFT-BA-e-1310 11
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
12 HFT-BA-e-1310
3.4 Keyboard overview
Button Function
• Turn on/off
• With a weight value >10% Max. the button function is
Taring
Navigation
Navigation
Navigation
• With a weight value <10% Max. the button function is
Zero setting
• Confirm entry
• Short-time increase of the resolutio n
• At numeric input increase flashing digit
• Scroll forward in menu
• Hold function / determination of a mean value
• In adjustment process: Change decimal digit
• Digit selection to the right
• Add weighing value to summation memory
• Display sum total
• Calculate weighing data via interface
• Delete
Navigation button
HFT-BA-e-1310 13
• Digit selection to the left
• Switch-over weighing unit
• Back to menu/weighing mode
3.5 Numerical input via the navigation buttons
Button
Navigation
Function
3.6 Label
Increase flashing dig i t
Digit selection to the left
Delete
Digit selection to the right
Confirm
Do not stand or go under suspended loads.
Do not use on building site.
Keep an eye on suspended loads.
Do not exceed nominal load of crane scales.
(example)
The product conforms to the requirements of the
German Equipment and Product Safety Act.
14 HFT-BA-e-1310
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