KERN MBB-M series Service Manual
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
Service manual
Baby weighing scale
KERN MBB-M (approval series)
Version 1.0
3/2010
GB
MBB-M-SH-e-1010
MBB-M-SH-e-1010
2
GB
KERN MBB-M
Version 1.0 3/2010
Service manual
Baby weighing scale
Table of Contents
1 Basic Information .............................................................................................. 3
2 Technical Data ................................................................................................... 4
3 Overview of Display / Keyboard ....................................................................... 5
4 Error Message Indication .................................................................................. 6
5 Trouble Shooting ............................................................................................... 7
6 Calibration .......................................................................................................... 8
6.1 Calibration switch and seals ................................................................................. 8
6.2 Calibration procedure .......................................................................................... 10
7 Service Mode ................................................................................................... 12
7.1 Navigation in the menu ........................................................................................ 12
7.2 Description ............................................................................................................ 13
7.3 Setting of maximum capacity and resolution .................................................... 14
8 Approval Mode – Menu Overview .................................................................. 15
9 Schematics ...................................................................................................... 16
10 System Block Diagram .................................................................................... 20
11 Display Format ................................................................................................ 21
12 Layout ............................................................................................................... 22
13 Assembly Drawing .......................................................................................... 25
MBB-M-SH-e-1010
3
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
4
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 calibration 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 accordance with 93/42/EEC
Category I with measuring function
MBB-M-SH-e-1010
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3 Overview of Display / Keyboard
Display view
Display Designation Description
1
0
Zeroing display Should the balance not display exactly zero
despite empty scale pan, press the
button. 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
4
HOLD function active Hold/Save function active
5
Net weight display Net weight will be displayed
6
Weight value display Current weight value will be displayed
MBB-M-SH-e-1010
6
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
7
5 Trouble Shooting
MBB-M-SH-e-1010
8
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
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