KERN HFM 1T0.1 User manual

Operating instructions
Electronic Crane Scales
Logbook
Regular maintenance and care
KERN HFM
Version 1.3

HFM-BA-e-1813
2
GB
KERN HFM
Version 1.32018-02
Operating instructions / logbook
Electronic Suspending Balance
Table of Contents
1. Technical Data ______________________________________________________________ 3
1.1 Dimensions (mm)_____________________________________________________________ 4
1.2 Nameplate __________________________________________________________________ 5
1.3 EC-Declaration of -Conformity___________________________________________________ 6
2. General S afety Ins truc tions ___________________________________________________ 7
3. The crane scales at a glance _________________________________________________ 10
3.1 Overview __________________________________________________________________ 10
3.2 Display ____________________________________________________________________ 11
3.3 Keyboard __________________________________________________________________ 11
3.3.1 Numeric entry_______________________________________________________________ 12
3.4 Radio remote control _________________________________________________________ 12
3.5 Sticker ____________________________________________________________________ 13
4. Commis sioning ____________________________________________________________ 14
4.1 Unpacking _________________________________________________________________ 14
4.2 Checking the original dimensions _______________________________________________ 14
4.3 Rechargeable battery operation_________________________________________________ 15
4.3.1 Standby mode ______________________________________________________________ 15
4.4 Suspending the balance_______________________________________________________ 16
5. Operation _________________________________________________________________ 17
5.1 Safety instructions ___________________________________________________________ 17
5.2 Loading the crane scales______________________________________________________ 18
5.3 Turn on/off _________________________________________________________________ 21
5.4 Setting balance to zero _______________________________________________________ 21
5.5 Taring_____________________________________________________________________ 22
5.6 Weighing __________________________________________________________________ 22
5.7 Record weight value (freeze)___________________________________________________ 22
6. Menu _____________________________________________________________________ 23
7. Adjus tment ________________________________________________________________ 25
8. Error messages ____________________________________________________________ 26
9. Cleaning, Repair, Maintenance and Disposal ____________________________________ 27
9.1 Cleaning and Disposal________________________________________________________ 27
9.2 Regular maintenance and care _________________________________________________ 27
9.3 Checklist „Regular maintenance“, (see chapter 9.2) _________________________________ 29
10. Appendix __________________________________________________________________ 32
10.1 Checklist „Enhanced maintenance“ (General revision) _______________________________ 32
10.2 List „spare parts and repair of safety-relevant parts“_________________________________ 33

HFM-BA-e-1813 3
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) 1 t (M1) 3 t (M1) 5 t (M1) 10 t (M1)
Stabilization time 2 s
Precision 0.2 % of max.
Warm-up time 30 min
Unit kg
Allowable ambient
temperature 0…+40 °C
Relative humidity 0 to 80 %, non-condensing
Supply voltage 220V -240V AC 50 Hz
Secondary voltage
powerpack 9V, 800 mA
Rechargeable battery
(standard equipment)
6 V, 10 Ah
Service life – background illumination ON - 50 h
Loading time 14 h
Display Digit height 30 mm
Housing size W x D x H,
(mm) 270 x 175 x 200 300 x 190 x 230
Housing material Metal, lacquered
Material hook and shackle Nickel plated steel
Net weight (kg) 16 18 23 35
Remote control (standard
equipment) Battery Size 23A (1 x 12V)
W x D x H 48 x 16 x 95 mm

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4
1.1 Dimensions (mm)
A B C D F H
∅
1
∅
2
∅
3 X
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

HFM-BA-e-1813 5
1.2 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

HFM-BA-e-1813 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. 10.3).
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.

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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.).

HFM-BA-e-1813 9
Monitoring of Test Resources
In the framework ofquality assurance the measuring-related properties of the
balance and, ifapplicable, the testing weight, must be checked regularly. The
responsible user must define a suitable interval as well as type and scope ofthis
test. 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 ofthe 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

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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 Keyboard,
see chapter 3.4
3 Keyboard
4 Safety bracket
5
Hook, revolvable

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3.2 Display
LED The LED lights up, if
HOLD the data-hold function is active
the weight display is stable
athe weight is in the area around the zero point
when the battery is being recharged
3.3 Keyboard
Button
Description of function
ON/OFF
•Turn on or off the balance
•Modification of readability
HFM 1T0.1: 100g

200g

500g
HFM 3T0.5: 500g

1 kg

2 kg
HFM 5T0.5: 500g

1 kg

2 kg
HFM 10T1: 1 kg

2 kg

5 kg
•Scroll forward in menu
HOLD
•Record weight value (freeze)
•Exit menu
a
•Taring
•Zeroing
•Confirm entry

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3.3.1 Numeric entry
Button Function
Increase flashing digit
HOLD Digit selection
aTerminate input
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.
TARE Taring
ZERO Zeroing
Modification of readability
HOLD Record weight value (freeze)

HFM-BA-e-1813 13
3.5 Sticker
Do not stand or go under suspended loads.
Do not use on building sites.
Suspended loads have to be observed constantly.
(Example)
Do not exceed the nominal load of crane scales.
The product meets the requirements of the German
Equipment and Product Safety Act.

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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.
Make sure that all parts are completely present.
•Crane scales
•Mains adapter
•Remote control
•Operating instructions (logbook)
Only use original packaging for returning.
4.2 Checking the original dimensions
Enter the original dimensions of the product datasheet into the grey fields of the
checklist chap. 9.3.
Realisation of all safety checks, see chapter 9.2 „Regular maintenance after three
months“
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.

HFM-BA-e-1813 15
4.3 Rechargeable battery operation
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.
Before the first use, the rechargeable battery should be charged by connecting it to
the mains power cable for at least 24 hours. The operating time of the rechargeable
battery is approx. 60 hours.
The capacity of the rechargeable battery will soon be exhausted, when the display
begins to flicker. If „bat lo“ appears, the balance will remain operable for approx. 30
minutes more, then it switches off automatically. Connect the power cable as soon as
possible to load the rechargeable battery.
During loading the LED display above informs you about the loading status of
the rechargeable battery.
red: Voltage has dropped below prescribed minimum.
green: Rechargeable battery is completely charged
yellow: Capacity of rechargeable battery almost exhausted
When the crane scales are out of operation for a longer period, remove the
rechargeable battery.
4.3.1 Standby mode
The crane scales change into the standby mode when any key is pressed or when
for 5 minutes (factory setting) no weight change has been measured. Only one
segment remains lighting. In order to finish the standby mode, press any key on the
keyboard or on the remote control.
Switch-off time selectable after 0, 5, 10, 20, 30 minutes, see chap. „F6 sl“.

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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).

HFM-BA-e-1813 17
5. Operation
5.1 Safety instructions
DANGER
Risk of injury due to falling loads!
Always work with particular care according to 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 mi
ssing 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 transport of loads
Do not stand or go under suspended loads.
Do not use on building sites.
Suspended loads have to be observed constantly.
(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!

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5.2 Loading the crane scales
For good weighing results observe the following, illustrations see next page:
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

HFM-BA-e-1813 19
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.

HFM-BA-e-1813
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Do not push or pull
Do not pull the hook horizontally
Do not use multiple suspensions

HFM-BA-e-1813 21
5.3 Turn on/off
Start-up
Press the ON/OFF button on the balance 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 ON/OFF button on the balance keyboard.
5.4 Setting balance to zero
In order to obtain optimal weighing results, reset to zero the balance before weighing.
Manual
Unload the balance
Press the ZERO button.
In the display appears 0 (kg) and the LED a lights up.
Automatic
In the menu the amount of the automatic zero point correction can be changed,
see chapter 6 / Function „F1 az“.