KERN & Sohn GmbH
Ziegelei 1
E-Mail: info@kern-sohn.com
Tel: +49-[0]7433- 9933-0
Internet: www.kern-sohn.com
Instruction Manual
Electronic Crane Scales
Logbook
Regular maintenance and care
KERN HUS/HUM
GB
Version 3.1
11/2011
D-72336 Balingen
Fax: +49-[0]7433-9933-149
HUS/HUM-BA-e-1131
KERN HUS/HUM
Electronic Crane Scales
GB
Version 3.1 11/2011
Operating instructions / logbook
Contents
1. Technical data _________________________________________________ 4
1.1 Dimensions (mm) _____________________________________________________ 6
2. General S afety Instructions ______________________________________ 7
3. The crane scales at a glance ____________________________________ 10
3.1 Overview __________________________________________________________ 10
3.2 Display ____________________________________________________________ 12
3.3 Keyboard __________________________________________________________ 13
3.4 Radio remote control _________________________________________________ 14
3.5 Label ______________________________________________________________ 15
4. Commis sioning _______________________________________________ 16
4.1 Unpacking _________________________________________________________ 16
4.2 Checking the original dimensions ________________________________________ 16
4.3 Power supply - rechargeable battery mode ________________________________ 17
4.4 Suspending the balance _______________________________________________ 18
5. Operation KERN HUM __________________________________________ 19
5.1 Safety instructions ___________________________________________________ 19
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 Record weight value (freeze) ___________________________________________ 26
5.8 Automatic switch-off (AU T O OF F ) _______________________________________ 26
6. Operation KERN HUS __________________________________________ 28
6.1 Safety instructions ___________________________________________________ 28
6.2 Loading the crane scales ______________________________________________ 30
6.3 Turn on/off _________________________________________________________ 33
6.4 Set balance to zero __________________________________________________ 33
6.5 Taring _____________________________________________________________ 34
6.6 Weighing __________________________________________________________ 34
6.7 Record weight value (freeze) ___________________________________________ 35
6.8 Automatic switch-off (AU T O OF F ) _______________________________________ 35
2 HUS/HUM-BA-e-1131
7. Adjus tment ___________________________________________________ 37
7.1 KERN HUM ________________________________________________________ 37
7.2 KERN HUS _________________________________________________________ 39
8. Error mes sages _______________________________________________ 40
9. Cleaning, Maintenance and Disposal ______________________________ 40
9.1 Cleaning and Disposal ________________________________________________ 40
9.2 Regular maintenance and care _________________________________________ 41
9.3 Checklist „regular maintenance“, (see chapter 9.2) __________________________ 42
9.4 KERN HUM ________________________________________________________ 42
9.5 KERN HUS _________________________________________________________ 45
10. E nclos ure ____________________________________________________ 48
10.1 Checklist „Enhanced maintenance“ (General revision) _______________________ 48
10.2 List „spare parts and repair of safety-relevant parts“ _________________________ 49
11. Declaration of Conformity _______________________________________ 51
HUS/HUM-BA-e-1131 3
1. Technical data
Remote control (standard
KERN HUM 1000K500 HUM 3000K100
Readability (d) 500 g 1 kg
Weighing range (max) 1 000 kg 3 000 kg
Taring range (subtractive) 1 000 kg 3 000 kg
Reproducibility 500 g 1 kg
Linearity ±1 kg ±2 kg
Recommended adjustment
weight, not added (class)
Possible Adjustment Poi nts 500 kg; 1 t 1 t; 2 t
Stabilization time 2 s
Precision 0.2 % of max.
Warm-up time 10 min
Unit kg
Allowable ambient
temperature
Relative humidity 0 to 85 %, non-condensing
Input Voltage
Secondary voltage
powerpack
Rechargeable battery
(standard equipment)
1 t (M3) 2 t (M3)
0…+40 °C
100 ∼ 240VAC
12VDC, 500 mA
Output 6 V 10 Ah
Service life 80 h
Loading time 8 h
Display Digit height 25 mm
Housing size W x D x H,
(mm)
Housing material Metal, lacquered
Material hooks and shackle Painted steel
Net weight (kg) 16 18
equipment)
4 HUS/HUM-BA-e-1131
210 x 228 x 180
1 battery (23A, 12V) included
Output 6 V 4.5 Ah
Remote control (standard
KERN HUS150K50 HUS300K100 HUS600K200
Readability (d) 0.05 kg 0.1 kg 0.2 kg
Weighing range (max) 150 kg 300 kg 600 kg
Taring range (subtractive) 150 kg 300 kg 600 kg
Reproducibility 0.05 kg 0.1 kg 0.2 kg
Linearity ± 0 .1 kg ±0.2 kg ±0.4 kg
Recommended adjustment
weight, not added (class)
Possible Adjustment Points 40 kg; 100 kg 100 kg; 200 kg 200 kg; 400 kg
Stabilization time 2 s
Precision 0.2 % of max.
Warm-up time 10 min
Unit kg
Allowable ambient
temperature
Relative humidity 0 to 85 %, non-condensing
Input Voltage
Secondary voltage
powerpack
100 kg (M3) 200 kg (M3) 2x200 kg (M3)
0…+40 °C
100 ∼ 240VAC
9VDC, 500 mA
Rechargeable battery
(standard equipment)
Display Digit height 23 mm
Housing size W x D x H,
(mm)
Housing material Plastic
Material hooks and shackle Painted steel
Net weight (kg) 4.0 18
equipment)
HUS/HUM-BA-e-1131 5
Service life 120 h
Loading time 8 h
150 x 145 x 160
2 x 1.5 V AAA included
1.1 Dimensions (mm) KERN HUS KERN HUM
HUS150K50
HUS300K100
HUS600K200
A B C D
24 14 330 380
24 14 330 380
24 14 350 400
HUM 1000K500
HUM 3000K100
A B C D
56 42 550 620
73 45 580 650
6 HUS/HUM-BA-e-1131
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. 10.2).
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).
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-permitte d c ond ens ation
(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.
HUS/HUM-BA-e-1131 7
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 loc ati on 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 devic es
- 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 weighings. 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.
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
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.).
8 HUS/HUM-BA-e-1131
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.
For checking original dimensions, s. 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
HUS/HUM-BA-e-1131 9
3. The crane scales at a glance
5
Hook, rev olvable
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
KERN HUS
10 HUS/HUM-BA-e-1131
1 Eyelet
2 Display
3 Keyboard
4 Safety bracket
6 For radio remote control, s. chap. 3.4
KERN HUM
1
Shackle
2 Antenna
3 Display
4 Keyboard
5 Safety bracket
6 Hook, revolvable
7 For radio remote control, s. chap. 3.4
HUS/HUM-BA-e-1131 11
3.2 Display
1. KERN HUS
• The indicator appears next to ZERO when weight is around Zero point
range.
• The indicator appears next to TARE after scales have been tared.
• The indicator next to „kg“ shows that the weight unit currently
displayed is „kg“.
2. KERN HUM
• The LED above ZERO is illuminated when weight is around Zero point range.
• The LED above TARE is illuminated after scales have been tared.
• The LED above ZERO is illuminated when the weight unit currently displayed
is „kg“.
12 HUS/HUM-BA-e-1131
3.3 Keyboard
• Taring
• Select me nu s etti ng s
• Record weight value (freeze)
• Taring
• Record weight value (freeze)
1. KERN HUS
Taste Funktionsbeschreibung
ON/ZERO
TARE
MODE
HOLD
OFF
• Turn on the balance
• Select function in menu
• Turn on or off backli ght
• Exit menu
• Turn off the balance
2. KERN HUM
Key Description of function
ZERO
TARE
MODE
HOLD
POWER
HUS/HUM-BA-e-1131 13
• Zeroing
• Select function in menu
• Select menu sett ings
• Exit menu
• Turn on or off the balance
3.4 Radio remote control
Standby mode
The balance can be operated by the radio remote control like by a keyboard. All
functions (excepted POWER ON/OFF) can be selected.
The LED should light up each time a key is pressed. If it does not light up, the
batteries in the remote control must be exchanged.
1. HERN HUS
Range on free surface (free of buildings) approx. 2.5 m.
Key
Remote
control
POWER ON/ZERO
ZERO ON/ZERO Zeroing
TARE
MODE MODE
HOLD
2. HERN HUM
Range on free surface (free of buildings) approx. 25 m.
Corresponding
key on scales
TARE Taring
HOLD
Function
Weighing mode
Select menu settings
Turn on or off backlight
Record weight value
(freeze)
14 HUS/HUM-BA-e-1131
Key
Remote
control
Z
T
M
H
Corresponding
key on scales
ZERO Zeroing
TARE Taring
MODE Select menu settings
HOLD
Function
Record weight value
(freeze)
3.5 Label
Do not exceed nominal load of crane scales.
(Example)
The product conforms to the requirements of the
German Equipment and Product Safety Act.
HUS/HUM-BA-e-1131 15
4. Commissioning
+
Thanks for your comprehension.
Your KERN Quality assurance team
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
break
CAUTION
Danger for the back!
Only use original packaging for returning.
Make sure that all parts are completely present.
• Crane scales
• Rechargeable battery
• Mains adapter
• Remote control
• Operating instr uctions (logbook)
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.
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.
4.2 Checking the original dimensions
Enter the original dimensions shown on the production data sheet in the grey
boxes of checklist chap. 9.3.
Check original dimension of crane scales; for implementation see chap. 9.2
„Regular Maintenance“
Enter all data (date, tester , res ult s) in the fir st 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
CAUTION
16 HUS/HUM-BA-e-1131
please contact a service partner authorised by Messrs. KERN.
4.3 Power supply - rechargeable battery mode
Material damage on crane scales
Make sure that the mains adapter, the cable and the mains plug
of the rechargeable battery.
Only use the delivered mains adapter.
CAUTION
Recharge battery:
are in a perfect condition.
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 10 hours.
To conserve energy, enable the automatic switch-off function „AUTO OFF“,
KERN HUM see chap.. 5.8 ./ KERN HUS see chap..6.8.
When the crane scales are out of operation for a longer period, remove the
rechargeable battery.
HUS/HUM-BA-e-1131 17
Rechargeable battery status display
The LED display informs you during loading about the loading status
red: Voltage has dropped below prescribed minimum.
green: Battery is completely charged.
Mains adapter connection
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).
18 HUS/HUM-BA-e-1131
5. Operation KERN HUM
5.1 Safety instructions
Danger
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 excessiv e wear or damag e
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
Do not stand or go under suspended loads.
Risk of injury due to falling loads!
Do not use on building site.
Keep an eye on suspended loads.
Do not exceed the nominal load of crane, crane scales or any kind
of load attachment devices at the crane scales.
(Example)
HUS/HUM-BA-e-1131 19
Make sure that scales are loaded in vertical direction
of pull
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.
20 HUS/HUM-BA-e-1131
5.2 Loading the crane scales
To achieve good weighing results please refer to the next page, fig. 1 and 2:
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 hor izontally.
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
HUS/HUM-BA-e-1131 21
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 whi ch cannot
guarantee a one-point
suspension.
Fig. 1
22 HUS/HUM-BA-e-1131
Do not push or pull
Do not pull the hook
horizontally
Do not use multiple
suspensions
Fig. 2
HUS/HUM-BA-e-1131 23
5.3 Turn on/off
Start-up
Press the POWER-key on the scales’ 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
Press the POWER-key on the scales’ keyboard.
5.4 Set balance to zero
In order to obtain optimal weighing results, reset to zero the balance before weighing.
Unload the balance
Press the ZERO button.
In the display appears 0 (kg) and the LED over ZERO lights up.
24 HUS/HUM-BA-e-1131
5.5 Taring
Suspend preload.
Press the TARE key. In the display appears 0 (kg) and the LED over TARE lights
up. The weight of the container is now internally saved.
Weigh the material, the net weight will be indicated.
• After removing the preload weight appears as negative display.
• The balance is able to only store one taring value at a time.
• The weighing range (max) for the scales will be reduced by the tared
range.
• To delete the tare value, remove load from weighing pan and press the
TARE button.
5.6 Weighing
Loading the crane scales.
The weight value will be displayed at once.
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 „ “.
Unload balance or reduce prel oad.
HUS/HUM-BA-e-1131 25
5.7 Record weight value (f r eeze)
Press the HOLD button to „freeze“ or to record the current weight value.
It remains displayed flashing until it is deleted.
In order to delete the "frozen" or the recorded weight, press any button.
5.8 Automatic switch-off (AUTO OFF)
Switch off the balance.
Press the TARE-key and switch on the scales at the same time. The first function
“F.1“ is displayed.
Press the TARE-key repeatedly until „F.4“ appears on the screen.
Confirm by pressing the MODE-key. The current setting will be displayed.
0._OFF: Automatic switch-off function is disabled.
4._OFF: The scales will now switch off automatically after 4 minutes without
change of load (default).
26 HUS/HUM-BA-e-1131
Use the MODE button to switch over into the available settings.
Save the selected setting by pressing the ZERO-key. The balance returns to
weighing mode.
HUS/HUM-BA-e-1131 27
6. Operation KERN HUS
6.1 Safety instructions
Danger
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 excessiv e wear or damag e
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
Do not stand or go under suspended loads.
Risk of injury due to falling loads!
Do not use on building site.
Keep an eye on suspended loads.
Do not exceed the nominal load of crane, crane scales or any kind
of load attachment devices at the crane scales.
(Example)
28 HUS/HUM-BA-e-1131
Make sure that scales are loaded in vertical direction
of pull
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.
HUS/HUM-BA-e-1131 29
6.2 Loading the crane scales
To achieve good weighing results please refer to t he next page, fig. 3 and 4:
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 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
30 HUS/HUM-BA-e-1131
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.
Fig. 3
HUS/HUM-BA-e-1131 31
Do not push or pull
Do not pull the hook
horizontally
Do not use multiple
suspensions
Fig. 4
32 HUS/HUM-BA-e-1131
6.3 Turn on/off
Start-up
Press the ON/ZERO-key on the scales’ 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
Press the OFF-key on the scales’ keyboard.
6.4 Set balance to zero
In order to obtain optimal weighing results, reset to zero the balance before weighing.
Unload the balance
Press the ON/ZERO button.
In the display appears 0 (kg) and the indicator appears nex t to ZERO.
HUS/HUM-BA-e-1131 33
6.5 Taring
Suspend preload.
Press the TARE key. In the display appears 0 (kg) and the indicator appears
next to TARE. The weight of the container is now internally saved.
Weigh the material, the net weight will be indicated.
• After removing the preload weight appears as negative display.
• The balance is able to only store one taring value at a time.
• The weighing range (max) for the scales will be reduced by the tared
range.
• To delete the tare value, remove load from weighing pan and press the
TARE button.
6.6 Weighing
Loading the crane scales.
The weight value will be displayed at once.
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 „ “.
Unload balance or reduce prel oad.
34 HUS/HUM-BA-e-1131
6.7 Record weight value (f r eeze)
Press the HOLD button to „freeze“ or to record the current weight value.
It remains displayed flashing until it is deleted.
In order to delete the "frozen" or the recorded weight, press any button.
6.8 Automatic switch-off (AUTO OFF)
Switch off the balance.
Press the TARE-key and switch on the scales at the same time. The first function
“F.1“ is displayed.
Press the TARE-key repeatedly until „F.4“ appears on the screen.
Confirm by pressing the MODE-key. The current setting will be displayed.
0._OFF: Automatic switch-off function is disabled.
4._OFF: The scales will now switch off automatically after 4 minutes without
change of load (default).
HUS/HUM-BA-e-1131 35
Use the MODE button to switch over into the available settings.
Save the selected setting by pressing the ON/ZERO-key. The balance returns to
weighing mode.
36 HUS/HUM-BA-e-1131
7. Adjustment
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated - in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location
(only if the balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out for the first commissioning, after each
change of location as well as in case of fluctuating environment temperature. To
receive accurate measuring values it is also recommended to adjust the balance
periodically in weighing operation.
Carry out adjustment as close as possible to the maximum load of the scales, see
chap. 1 „Technical data“. Weights providing different nominal val ues can be used but
from a metrological point of view this is not ideal. For admissible adjustment weights
see table 1.
Info about test weights can be fou nd on the Internet at: http://www.kern-sohn.com
Tab. 1:
Model Admissible Adjustment
Weights
HUS150K50 40 kg; 100 kg
HUS300K100 100 kg; 200 kg
HUS600K200 200 kg; 400 kg
HUM 1000K500 500 kg; 1 t
HUM 3000K100 1 t; 2 t
7.1 KERN HUM
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.
Switch-off balance and attach a carrying help if necessary.
Press and hold ZERO- and MODE whilst at the same time switching on the
scales with the carrying aid attached. Release keys, „CAL?” will be displayed.
HUS/HUM-BA-e-1131 37
Press the MODE-key, „YES“ will be displayed, followed by an alternating display
such as ”Load 2000 or 1000“.
The admissible adjustment weights will be displayed.
Attach the admissible adjustment weights (s. table 1). Wait until the scales display
„done“, and start to count down.
After successful adjustment the balance carries out a selftest and automatically
returns to weighing mode. Remove adjustment weight and also the carrying aid, if
attached.
An adjusting error or incorrect adjusting weight will be indicated by the error
message; repeat adjustment procedure.
38 HUS/HUM-BA-e-1131
7.2 KERN HUS
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.
Switch-off balance and attach a carrying help if necessary.
Press and hold ON/ZERO- and MODE whilst at the same time switching on the
scales with the carrying aid attached. Release keys, „CAL?” will be displayed.
Press the MODE-key, „YES“ will be displayed, followed by an alternating display
such as ”Load 100 or 40“, see table 1.
The admissible adjustment weights will be displayed.
Attach the admissible adjustment weights (s. table 1). Wait until the scales display
„done“, and start to count down.
After successful adjustment the balance carries out a selftest and automatically
returns to weighing mode. Remove adjustment weight and also the carrying aid, if
attached.
An adjusting error or incorrect adjusting weight will be indicated by the error
message; repeat adjustment procedure.
HUS/HUM-BA-e-1131 39
8. Error messages
Error message
Description
Possible causes
damaged
Risk of injury and risk of material damage!
Reduce load
Flashing number display
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
Maximum load exceeded
Capacity of rechargeable
battery exhausted
Check whether the
balance has been
Recharge battery
9. Cleaning, Maintenance and Disposal
The crane scales are part of a hoisting device!
For a safe operation please observe the following:
Have carried out a regular maintenance by trained specialized
Danger
staff
Carry out regular maintenance and care, see chapter 9.2 and 9.3
Have the parts exchanged only by trained specialized staff.
If there arose discrepancies with the safety checklist, the balance
must not more be put into operation.
Do not repair the crane scales by yourself. Repair may only be
carried out by service partners authorized by Messrs. KERN.
9.1 Cleaning and Disposal
Damage on the crane scales!
Do not use any industrial solutions or chemicals
CAUTION
Clean the keyboard and the display with a soft cloth soaked in mild window
cleaning agent.
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.
40 HUS/HUM-BA-e-1131
9.2 Regular maintenance and care
Check the application of the safety bracket on the hook,
partner (see list, chap. 10.2).
250 000 weighings
500 000 weighings
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 prevent ion of accidents as well as the working, operation and
safety regulations of the owner-operator.
To check the dimensions only use suitable test devices.
The regular 12-month maintenance must only be carried out by trained
specialized staff (KERN customer service).
The results of the maintenance must be written down in the checklist (chap. 9.3).
The additional results of the extended maintenance have to be entered in the
checklist (chapter 10.1).
The replaced spare parts also must be entered, (chapter 10.2)
Regular maintenance:
Initial start-up,
every 3 months or
definitely after
12 500 weighing
processes
Every 12 m onths or
in any case after
50 000 weighings
Check all dimensions, see checklist chap. 9.3
Check the shackle for wear and tear, such as e.g. plastic
deformation, mechanical damage (unevenness), notches,
striation, cracks, corrosion, thread damage and torsions.
moreover check for fault and corr ect f uncti o n
Ensure that the positioning screws at 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
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
Every 10 years or
anyway after
Important note
When checking for wear and tear please refer to the drawing (KERN HUM fig. 3,
chap. 9.3.1; KERN HUS fig. 4, chap. 9.3.2) below.
HUS/HUM-BA-e-1131 41
All load carrying parts have to be exchanged by trained
specialized staff (KERN customer service).
Replace the crane scales entirely
9.3 Checklist „regular maintenance“, (see chapter 9.2)
9.3.1 KERN HUM Original dimensions crane scales, serial no.: ………………………………… Capacity ………………………………
Shackle Hooks
a (mm) b (mm) c (mm) Wear and
tear
Positioning
screws
d (mm) e (mm)
Angle α (°)
Wear and
tear
Safety bracket
Date ………………………………… Tester ………………………………………
Shackle Hooks
Fixing
screws
tight
d e
10 % 5 %
Angle α
10 °
Wear and tear
(see grey fields)
No deformation or
cracks
Safety
bracket
Perfect
function
Date Tester
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
18 months / 75 000 x
21 months / 87 500 x
HUS/HUM-BA-e-1131 42
Shackle Hooks
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
51 months / 212 500 x
a b c
5 % 0 % 5 %
Wear and tear
(see grey fields)
No deformation or
cracks
Fixing
screws
tight
d e
10 % 5 %
Angle α
10 °
Wear and tear
(see grey fields)
No deformation or
cracks
Safety bracket
Perfect working
order
Date Tester
54 months / 225 000 x
57 months / 237 500 x
60 months/250000x
All load carrying parts have to be exchanged by a service partner authorised by KERN.
bold letters = this maintenance work has to be carried out by a service partner authorized by KERN.
HUS/HUM-BA-e-1131 43
Fig. 3
HUS/HUM-BA-e-1131 44
α
9.3.2 KERN HUS
Original dimensions crane scales, serial no.: ………………………………… Capacity ………………………………
Eyelet Hooks
a (mm) b (mm) Wear and tear c (mm) d (mm)
Angle α (°)
Wear and tear Safety bracket
Date ………………………………… Tester ………………………………………
Eyelet Hooks
Max. admitted
variation
Revision prior to first
use
3 months / 12 500 x
6 months / 25 000 x
9 months / 37500 x
12 months/ 50 000 x
15 months / 62 500 x
a b
5 % 0 %
Wear and tear (see
grey fields)
No deformation or
cracks
c d
10 % 5 %
Angle
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
HUS/HUM-BA-e-1131 45
α
Eyelet Hooks
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/150000 x
39 months /162 500 x
42 months /175 000 x
45 months /187 500 x
48 months/200000 x
51 months /212 500 x
54 months /225 000 x
57 months /237 500 x
a b
5 % 0 %
Wear and tear (see
grey fields)
No deformation or
cracks
c d
10 % 5 %
Angle
10 °
Wear and tear
(see grey fields)
No deformation
or cracks
Safety bracket
Perfect working order
Date Tester
60 months/250000x
All load carrying parts have to be exchanged by a service partner authorised by KERN.
bold letters = this maintenance work has to be carried out by a service partner authorized by KERN.
HUS/HUM-BA-e-1131 46
Fig. 4
HUS/HUM-BA-e-1131 47
10. Enclosure
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
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
Magnetic powder
test for cracks
Replace crane scales entirely
Hooks Shackle
Screwed
connections
Date Name Signature
HUS/HUM-BA-e-1131 48
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
HUS/HUM-BA-e-1131 49
Crane scales Model ………………………………….. Serial no. ……………………………………………..
Part Action Date Name Signature
HUS/HUM-BA-e-1131 50
11. Declaration of Conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
E-Mail: info@kern-sohn.de
Tel: 0049-[0]7433- 9933-0
Internet: www.kern-sohn.de
D
Konformitätserklärung
Wir erklären hierm it, dass das Produkt, auf das sich diese Erk lärung bezieht,
mit den nachstehenden Normen übereinstimmt.
GB
Declaration of
conformity
We hereby declare that the produc t to which this declaration ref ers conforms
with the following standards.
CZ
Prohlášení o
shode
Tímto prohlašujem e, že výrobek , kterého se toto proh lášení t ýká, je v souladu
s níže uvedenými normami.
E
Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F
Déclaration de
conformité
Nous déclarons avec cela res ponsabilité que l e produit, auquel se r apporte la
présente déclaration, est conforme aux normes citées ci-après.
I
Dichiarazione di
conformitá
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
NL
Conformiteitverklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P
Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL
Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie dotyczy,
jest zgodny z poniższymi normami.
RUS
Заявление о
соответствии
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
Mark applied
EU Directive
Standards
Date: : 12.01.2012
Signature:
KERN & Sohn GmbH
Management
51
Postfach 4052
Fax: 0049-[0]7433-9933-149
Konformitätserklärung
EC-Konformitätserklärung EC-Declar ati on of -Conformity
EC-
Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
2006/95/EC
KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
Low Voltage Directive
2004/108/EC
EMC Directive
2006/42/EC
Machine directive
EN 61010-1:2001
EN 55022:2006
EN 61000-3-2:2006
EN 61000-3-3:1995/A1:2001/A2:2005
EN 55024:1998/A1:2001/A2:2003
EN13155:2003+A2:2009
HUS/HUM-BA-e-1131
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