KERN & SOHN HFM 10T1 User Manual
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
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