KERN HFM Service Manual

KERN & Sohn GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Service manual
Crane scale

KERN HFM

Version 1.0
12/2011
GB

Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

HFM-SH-e-1110

GB

KERN HFM

Version 1.0 12/2011

Service manual
Crane scale

CONTENTS

1 Basic information .............................................................................................. 3

2 General safety regulations ............................................................................... 4

2.1 Owner’s duties ........................................................................................................ 4

2.2 Organizational measures ....................................................................................... 4

2.3 Ambient conditions ................................................................................................ 4

2.4 Intended use ........................................................................................................... 5

2.5 Safety conscious working methods ..................................................................... 5

3 Menu ................................................................................................................... 6

3.1 Navigation in the menu .......................................................................................... 6

3.2 Menu overview ........................................................................................................ 7

3.3 Setup of capacity (maximum load) ....................................................................... 8

4 Adjustment ......................................................................................................... 9

5 Trouble shooting ............................................................................................. 10

6 Maintenance ..................................................................................................... 12

6.1 Cleaning ................................................................................................................ 12

6.2 Replacement of rechargeable battery ................................................................. 12

6.3 Regular maintenance ........................................................................................... 13

7 Spare parts ....................................................................................................... 14

7.1 Exploded drawing ................................................................................................. 14

7.2 Parts list ................................................................................................................ 15

8 Circuit diagram ................................................................................................ 16

2 HFM-SH-e-1110

1 Basic information

Grundlegende Hinweise

The device must be repaired only by trained specialist staff or personnel with
professional formation (such as a repair-specialist accredited by law
concerning verification).

The service manual is obligatory for repair work.
After repair, original conditions of the device have to be restored.
Only original spare parts should be used.

When it becomes necessary to replace a load-bearing part, ALL load-

bearing parts need to be replaced for safety reasons.
The safety bracket on the hook may be changed.

Das Gerät darf nur von geschultem oder beruflich ausgebildetem
Fachpersonal (z. B. eichrechtlich anerkannter Instandsetzer) repariert werden.

Die Serviceanleitung ist bindend für Reparaturen.

Das Gerät muss nach erfolgter Reparatur wieder in den Originalzustand
zurückversetzt werden.

Es dürfen nur Originalersatzteile verwendet werden.

Sollte es notwendig sein, ein lasttragendes Teil zu tauschen, so müssen in

diesem Falle aus Sicherheitsgründen ALLE lasttragenden Teile getauscht werden.
Die Sicherheitslasche am Haken darf getauscht werden.

HFM-SH-e-1110 3

2 General safety regulations

Risk of injury and damage!
The crane scale is part of the lifting device!

Æ Read the User manual carefully before you put the crane scale

DANGER

2.1 Owner’s duties

▲ Only operate the crane scale in compliance with the instructions given in this
Service manual, the User manual or in any other documents provided by the
manufacturer.

▲ Observe the national accident prevention regulations and the owner’s occupa­tional, operating and safety regulations.

▲ The manufacturer declines any warranty and liability for damages caused as a
result of the owner’s failure to operate the crane scale in compliance with the
instructions given in this Service manual, the User manual or in compliance with
any other regulations referred to in this clause or that are otherwise applicable.

▲ Perform periodical safety inspection and maintenance as described in the User
manual.

▲ Log test result and file in inspection and test log book.

into operation for the first time.

2.2 Organizational measures

▲ Only entrust trained and instructed personnel with operation.
▲ Make sure that the User manual is available at all times at the crane scale

operation location.
▲ Have installation, commissioning and maintenance carried out by specially

trained personnel only.

▲ The crane scale may only be repaired by authorized KERN service personnel.
▲ Have all safety inspections and repairs logged in the lists in the User manual.

2.3 Ambient conditions

▲ Do not operate the crane scale in explosion hazardous areas.
▲ Only operate the crane scale in ambient conditions as described in the User

manual.
▲ Avoid temperature changes that could cause condensation in the inner of the

crane scale.
▲ Do not operate the crane scale in corrosive ambient conditions.

4 HFM-SH-e-1110

2.4 Intended use

▲ Use the crane scale exclusively for lifting and weighing freely moveable loads.
▲ Danger of injury in case of improper use. For example, the following is not

permitted:

–exceeding the permissible nominal load of the crane, crane scale or any type
of load attachment equipment,
–transporting persons,
–pulling loads at an angle,
–tearing loose, pulling or dragging loads.

▲ Changes or modifications to the crane scale or the crane are not permitted.

2.5 Safety conscious working methods

▲ Do not stand under suspended loads.
▲ Only position the crane so that the load is lifted vertically.
▲ Wear personal safety equipment (helmet, safety gloves) when working with the

crane and crane scale.

▲ Do not leave controls while load is suspended.
▲ Operate the crane at a safe speed.
▲ Do not allow the load to swing when it is being moved.

Decommissioning and storage

▲ When the crane scale is not in use, always remove all load attachment equip­ment from the crane scale and remove the crane scale from the crane.

▲ Do not store the crane scale outdoors.

HFM-SH-e-1110 5