KERN HUS Series User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Instruction Manual
Electronic Crane Scales
Logbook
Regular maintenance and care
KERN HUS/HUM
Version 3.1
11/2011
GB
HUS/HUM-BA-e-1131

2 HUS/HUM-BA-e-1131
GB
KERN HUS/HUM
Version 3.111/2011
Operating instructions / logbook
Electronic Crane Scales
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 s ioning _______________________________________________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
5.1Safety 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 (AUTO OFF) _______________________________________ 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 (AUTO OFF) _______________________________________ 35

HUS/HUM-BA-e-1131 3
7. Adjustment ___________________________________________________37
7.1 KERN HUM ________________________________________________________ 37
7.2 KERN HUS_________________________________________________________ 39
8. Error messages _______________________________________________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

4 HUS/HUM-BA-e-1131
1. Technical data
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) 1 t (M3) 2 t (M3)
Possible Adjustment Points 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 0…+40 °C
Relative humidity 0 to 85 %, non-condensing
Input Voltage 100 ∼240VAC
Secondary voltage
powerpack 12VDC, 500 mA
Rechargeable battery
(standard equipment)
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) 210 x 228 x 180
Housing material Metal, lacquered
Material hooks and shackle Painted steel
Net weight (kg) 16 18
Remote control (standard
equipment) 1 battery (23A, 12V) included

HUS/HUM-BA-e-1131 5
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) 100 kg (M3) 200 kg (M3) 2x200 kg (M3)
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 0…+40 °C
Relative humidity 0 to 85 %, non-condensing
Input Voltage 100 ∼240VAC
Secondary voltage
powerpack 9VDC, 500 mA
Rechargeable battery
(standard equipment)
Output 6 V 4.5 Ah
Service life 120 h
Loading time 8 h
Display Digit height 23 mm
Housing size W x D x H,
(mm) 150 x 145 x 160
Housing material Plastic
Material hooks and shackle Painted steel
Net weight (kg) 4.0 18
Remote control (standard
equipment) 2 x 1.5 V AAA included

6 HUS/HUM-BA-e-1131
1.1 Dimensions (mm)
KERN HUS KERN HUM
A B C D A B C D
HUS150K50 24 14 330 380 HUM 1000K500 56 42 550 620
HUS300K100 24 14 330 380 HUM 3000K10073 45 580 650
HUS600K200 24 14 350 400

HUS/HUM-BA-e-1131 7
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 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.

8 HUS/HUM-BA-e-1131
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 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.).

HUS/HUM-BA-e-1131 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.
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

10 HUS/HUM-BA-e-1131
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
KERN HUS
1 Eyelet
2 Display
3 Keyboard
4 Safety bracket
5
Hook, revolvable
6 For radio remote control, s. chap. 3.4

HUS/HUM-BA-e-1131 11
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

12 HUS/HUM-BA-e-1131
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“.

HUS/HUM-BA-e-1131 13
3.3 Keyboard
1. KERN HUS
Taste Funktionsbeschreibung
ON/ZERO •Turn on the balance
TARE
•Taring
•Select function in menu
MODE
•Select menu settings
•Turn on or off backlight
HOLD
•Record weight value (freeze)
•Exit menu
OFF •Turn off the balance
2. KERN HUM
Key Description of function
ZERO •Zeroing
TARE
•Taring
•Select function in menu
MODE •Select menu settings
HOLD
•Record weight value (freeze)
•Exit menu
POWER •Turn on or off the balance

14 HUS/HUM-BA-e-1131
3.4 Radio remote control
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
Corresponding
key on scales Function
POWER ON/ZERO
Standby mode

Weighing mode
ZERO ON/ZERO Zeroing
TARE TARE Taring
MODE MODE
Select menu settings
Turn on or off backlight
HOLD HOLD Record weight value
(freeze)
2. HERN HUM
Range on free surface (free of buildings) approx. 25 m.
Key
Remote
control
Corresponding
key on scales Function
ZZERO Zeroing
T TARE Taring
M MODE Select menu settings
H HOLD Record weight value
(freeze)

HUS/HUM-BA-e-1131 15
3.5 Label
(Example)
Do not exceed nominal load of crane scales.
The product conforms to the requirements of the
German Equipment and Product Safety Act.

16 HUS/HUM-BA-e-1131
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
CAUTION
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
•Rechargeable battery
•Mains adapter
•Remote control
•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. 9.3.
Check original dimension of crane scales; for implementation see chap. 9.2
„Regular Maintenance“
Enter all data (date, tester, results) in the first line under „Inspection before first
use“ in the checklist (see chapter 9.3)
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.

HUS/HUM-BA-e-1131 17
4.3 Power supply - rechargeable battery mode
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.
Recharge battery:

Rechargeable battery status display
The LED display informs you during loading about the loading status
of the rechargeable battery.
red: Voltage has dropped below prescribed minimum.
green: Battery is completely charged.

Mains adapter connection
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.

18 HUS/HUM-BA-e-1131
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).

HUS/HUM-BA-e-1131 19
5. Operation KERN HUM
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
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.

20 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.