KERN KERN MBB-M series Manuel utilisateur

KERN & Sohn GmbH

Ziegelei 1

D-72336 Balingen

E-Mail: [email protected]

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

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

Internet: www.kern-sohn.com

Service manual

Baby weighing scale

KERN MBB-M (approval series)

Version 1.0

3/2010

MBB-M-SH-e-1010

GB KERN MBB-M

Version 1.0 3/2010

Service manual

Baby weighing scale

Table of Contents

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

2Technical Data................................................................................................... 4

3Overview of Display / Keyboard....................................................................... 5

4Error Message Indication.................................................................................. 6

5Trouble Shooting............................................................................................... 7

6Calibration.......................................................................................................... 8

6.1 Calibration switch and seals .................................................................................8

6.2 Calibration procedure ..........................................................................................10

7Service Mode ................................................................................................... 12

7.1 Navigation in the menu........................................................................................12

7.2 Description............................................................................................................13

7.3 Setting of maximum capacity and resolution....................................................14

8Approval Mode – Menu Overview .................................................................. 15

9Schematics ...................................................................................................... 16

10 System Block Diagram.................................................................................... 20

11 Display Format ................................................................................................ 21

12 Layout............................................................................................................... 22

13 Assembly Drawing .......................................................................................... 25

MBB-M-SH-e-1010

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.

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.

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.

Hinweis zu konformitätsbewerteten Waagen:

Reparatur darf nur in 100% -iger Übereinstimmung mit der

Bauartzulassung erfolgen. Ein Verstoß gegen diese Vorgabe führt zum Erlöschen der

Bauartzulassung!

Nach erfolgreicher Reparatur muss eine Nacheichung erfolgen, um die Waage

wieder im gesetzlich geregelten Bereich verwenden zu können.

MBB-M-SH-e-1010

2 Technical Data

KERN MBB 15K5M MBB 15K2DM

Weighing range (max) 15 kg 6 kg; 15 kg

Minimum load (Min) 100 g 40 g

Verification value (e) 5 g 2 g; 5 g

Display LCD 24mm digit height

1.0 inch LCD with 5 and ½ digits

Recommended calibra-

tion weight, (class) 12 kg

(M1)

Warm-up time 10 min

Operating temperature + 5° C …. + 35° C

Storage temperature - 20°C … + 60°C

Humidity of air max. 80 % (not condensing)

Power Supply Line adapter 15V / 300 mA ( EN60601-1)

Battery operation 6 x 1.5V, size AA

Auto Off After 3 min without load change, adjustable

Housing display unit

(B x D x H) mm 210 x 110 x 45

Weighing pan (WxD) mm 550 x 240

Calibrated in accordance

with 90/384/EEC Medical grade III

Medical product in accor-

dance with 93/42/EEC Category I with measuring function

MBB-M-SH-e-1010

3 Overview of Display / Keyboard

Display view

Display Designation Description

1 0Zeroing display Should the balance not display exactly zero

despite empty scale pan, press the but-

ton. Your balance will be set to zero after a

short standby time.

2 Stability display Scales are in a steady state

3 Power supply connected Illuminates in the event of power supply via

mains adaptor

HOLD function active Hold/Save function active

Net weight display Net weight will be displayed

Weight value display Current weight value will be displayed

MBB-M-SH-e-1010

Keyboard

Button Designation Function

ON/OFF-switch Turn on/off

Zero setting key Balance will be reset to 0.0 kg.

Possible up to max. 2% of maximum load for verified

scales or 2 % or 100% of maximum load for all other

scales (selectable via menu)

HOLD button Hold function/Calculation of a stable weight value

TARE button Tare balance

4 Error Message Indication

A. ErrE : EEprom Error

B. ErrL : Low zero count

C. Err : High zero count / Overload

D. :Low battery indication

E. ooooo : The scale plate was loaded during switching on the scale

MBB-M-SH-e-1010

5 Trouble Shooting

MBB-M-SH-e-1010

6 Calibration

6.1 Calibration switch and seals

After verification the display device is sealed at the indicated positions.

Verification of the balance is invalid without the "seal".

Position of the official seals:

1. Rear of display device 2. Battery compartment

3. Bottom side of platform

MBB-M-SH-e-1010

Position of calibration switch:

Position of calibration switch Status

1. to the left Test mode

Shows internal count, e.g. 100052

Zero count: 5000 ~ 200000

Span count: 10000 ~ 250000

Note: If the value of internal count is outside the

reference value, please change the load cell or the

main board.

2. concentric Service mode

Calibration position – enables calibration

3. to the right Approval mode

Verification position – calibration locked

1 2 3

Switch key

MBB-M-SH-e-1010

6.2 Calibration procedure

Observe stable environmental conditions. A warming up time of approx. 10 minutes is

required for stabilization.

Attention:

In calibrated balances the calibration function is switch locked. To carry out calibra-

tion, set the switch to calibration position (centre position). (See chpt. 6.1).

Display Operation

z000

ÖStart balance by pressing OFF

SETUP

UNKT

ÖPress for approx. 3 sec,

in the display appears „SETUP“, followed by „UNIT“

CAL

ÖPress TARE repeatedly until “CALIB“ appears

CAL U

ÖPress HOLD , „CAL U“ appears

ÖPress TARE , the appeared triangle Wmust be located in the

upper left part of the display.

If it is not, press again TARE .

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