KERN HCB Series Manuel utilisateur

KERN & Sohn GmbH

Ziegelei 1

D-72336 Balingen

E-Mail: info@kern-

sohn.com

Tel: +49-[0]7433- 9933-0

Fax: +49-[0]7433-9933-149

Internet: www.kern-

sohn.com

Servicemanual

KERN HCB

Version 1.0

06/2014

HCB-SH-e-1410 - 2 -

KERN HCB

Version 1.0 04/2014

Servicemanual

Inhaltsverzeichnis

1Basic Information...........................................................................................- 3 -

2Introdution......................................................................................................- 3 -

3Introduction....................................................................................................- 4 -

3.1 Features..................................................................................................................................- 4 -

4Span Calibration.............................................................................................- 4 -

4.1 Internal Calibration Procedure...........................................................................................- 4 -

5Trouble Shooting ...........................................................................................- 5 -

6Schematics.....................................................................................................- 6 -

7Components Layout ......................................................................................- 7 -

8Spare part list.................................................................................................- 8 -

- 3 - HCB-SH-e-1410

1 Basic Information

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.

Instructions about conformity-evaluated scales:

Repair must be carried only at 100% compliance with the type approval. A violation of this

specification will result in a loss of the type approval! After successful repair the balance will have to

be reverified before it can be used again in a statutorily regulated field.

Detailed instructions about conformity-evaluated scales:

Repair must be carried only at 100% compliance with the type approval. A violation of this

specification will result in a loss of the type approval!

After successful repair the balance will have to be reverified before it can be used again in a

statutorily regulated field.

2 Introdution

This service manual covers the HCB series and is edited for the authorized servicing personnel.

Note all rights are reserved. Copying any part of this manual is prohibited without our permission.

In this lineup it is an eco product, therefore, it is not intended to represent the repair manual in detail,

since the construction of the balance is very simple. It is therefore only referring to the list of related

to disposal spare parts.

Bei dieser Modelreihe handelt es sich um eine ECO Produkt, daher entfällt der detaillierte Teil der

Reparaturanleitung.

HCB-SH-e-1410 - 4 -

3 Introduction

3.1 Features

Tare function

Display segment test function

Display Hold function (6 modes)

Negative value indication

Low battery indicator

Auto zero

Auto off function (selectable)

Zero Tracking selectable

Overload indication

Digital Internal calibration

Solder pads to prevent end user internal calibration

Operated by 3 x AA size alkaline batteries

4 Span Calibration

1. Turn scale on by pressing the [ON/TARE/OFF] key.

2. Press the [UNIT] key for 3 seconds. Display will show [CAL] and then the required

calibration weight.

3. Hang the standard weight onto the scale. Wait until display shows [ F ] then turn off. In

case [ E ] is display instead of [ F ], this indicates a calibration procedure error, unstable

or wrong calibration weight applied for calibration. Reset the scale and repeat the

procedures.

4.1 Internal Calibration Procedure

1. Remove battery compartment door and the two screws inside. Disassemble the rear

housing of the scale.

2. Connect J1 on the PC board.

3. Install batteries. With scale on its weight position, turn scale on. Display will show the

internal counts. The reading shall fall into the range of 3000 to 5000. In case out of this

range, connect J9 to increase or decrease reading. Connect or disconnect J5, J6, or J7 to

adjust the reading to the required range.

4. Press [ON/TARE/OFF] key once. Display will show the required calibration weight. Hang

weight onto the scale accordingly until scale show [ F ] and turn off.

5. Disconnect J1. Calibration completed. Check the accuracy at different weight.

6. Install the rear housing of scale with the two screws.

- 5 - HCB-SH-e-1410

5 Trouble Shooting

Power on



Full Segments?

If no display, check batteries; keyboard / overlay; connection between

battery—main board.

If wrong segments, check fixing of LCD, zebra connector under LCD.



Display Zero?

If display [LO], check battery>3.5V.

If display [ E] , check internal count.



Proper readout?

If unstable reading, check hook, loadcell, Clearance between metal sensor

and lower plastic housing



Correct reading?

If not accurate, perform span calibration.

If cannot reach full capacity, loadcell, and internal zero point.

If always zero, check internal zero point. Internal calibration if necessary.



Normal operation.

HCB-SH-e-1410 - 6 -

6 Schematics

- 7 - HCB-SH-e-1410

7 Components Layout

HCB-SH-e-1410 - 8 -

8 Spare part list

KERN

Nummer /

KERN part

no.

Beschreibung

Description

Model

RHCB-4001

Folientastatur

Key panel

HCB

20K10

RHCB-4002

Folientastatur

Key panel

HCB

20K50

RHCB-4003

Folientastatur

Key panel

HCB

50K20

RHCB-4004

Folientastatur

Key panel

HCB

50K100

RHCB-4005

Folientastatur

Key panel

HCB

99K50

RHCB-4006

Folientastatur

Key panel

HCB

100K200

RHCB-4007

Folientastatur

Key panel

HCB

200K100

RHCB-4008

Folientastatur

Key panel

HCB

200K500

RHCB-4009

Folientastatur

Key panel

HCB 0.5T-3

RHCB-4010

Folientastatur

Key panel

HCB 1T-3

RHCB-3001

LC-Display

LC-display

RHCB-8001

Batteriedeckel

Battery

cover

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