KERN MCN-M Manuale utente

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

Medical Chair scale

KERN MCN-M

Type TMCN 200K-1M-A

Version 2.0

05/2022

MCN-M-SH-e-2220

2 MCN-M-SH-e-2220

KERN MCN-M

Version 1.0 –05/2022

Servicemanual

Table of contents

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

2Introduction.................................................................................................... 3

3Appliance overview ....................................................................................... 4

3.1 Feature overview........................................................................................................................ 7

3.2 Keyboard overview..................................................................................................................... 8

3.3 Installing the chair scales ........................................................................................................... 9

3.4 Levelling ................................................................................................................................... 10

3.5 Mains connection...................................................................................................................... 12

3.6 Safety cable.............................................................................................................................. 12

3.7 Rechargeable battery operation with an optional battery power pack ..................................... 13

3.8 Battery operation...................................................................................................................... 14

3.9 Insert batteries.......................................................................................................................... 15

3.10 Initial Commissioning................................................................................................................ 16

4Calibration and sealing information........................................................... 17

4.1 General introduction:................................................................................................................ 17

4.2 Verification notes:..................................................................................................................... 17

4.3 Position adjustment switch and seals:...................................................................................... 18

4.4 Verification validity period (current status in G)........................................................................ 18

5Service Menu................................................................................................ 19

5.1 Software identification .............................................................................................................. 20

5.2 Adjustment................................................................................................................................ 20

5.3 Adjustment procedure .............................................................................................................. 21

6Maintenance................................................................................................. 22

6.1 Service, maintenance............................................................................................................... 22

6.2 Error Codes .............................................................................................................................. 22

6.3 Check the Load cell.................................................................................................................. 23

6.4 Checking the different Voltages ............................................................................................... 23

6.5 Trouble Shooting ...................................................................................................................... 24

7Exchange of components ........................................................................... 25

7.1 Spare parts list.......................................................................................................................... 25

7.2 Opening the device................................................................................................................... 25

7.3 Exchange of components......................................................................................................... 26

7.4 Replacement of the main board ............................................................................................... 26

8Technical drawings...................................................................................... 27

8.1 Exploded view chair construction............................................................................................. 27

8.2 Exploded view indicator............................................................................................................ 29

8.3 TKMG/TKMH Wiring Diagram.................................................................................................. 31

8.4 TKMG/TKMH Functional Block Diagram.................................................................................. 32

8.5 TKMG/TKMH Schematic Diagram ........................................................................................... 33

MCN-M-SH-e-2220 3

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 must 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.

The operation and configuration of each scale is described in the accompanying

manual of the scale. Any safety information in respect for verification are also

described in the accompanying manual

2 Introduction

This service manual covers the MCN chair scale 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.

4 MCN-M-SH-e-2220

3 Appliance overview

1. Seat pan

2. Bubble level

3. Display Unit

4. Manipulations

5. Parking brake

6. Adjustment switch

7. Terminal power supply unit

8. Connection cable "Display - Chair"

9. Battery compartment

10. KUP interface (Kern Universal Port)

MCN-M-SH-e-2220 5

Details:

Parking brake open

Parking brake closed

Footrest and adjustment foot

Accessory bag

6 MCN-M-SH-e-2220

Folding arm rests

MCN-M-SH-e-2220 7

3.1 Feature overview

•Large LCD, 6-digit H=25mm, VA=100x40mm, no backlight

•Stable, zero, battery level, gloss/net weight indications

•Weighing unit: kg only

•6 buttons operated

•Tare up to Max

•Pre-Tare function, with 4 memories

•BMI function

•Display Hold function

•Print function

•Application menu

•Setup menu

•Service menu

•Kern Communication Protocol (KCP)

•Kern Universal Port (KUP) interface, VGA-15 female connector

•Built-in WiFi interface

•Optional internal Memory / Real Time Clock module

•Optional external RS-232 interface through KUP

•Optional external USB device interface through KUP

•Optional external Bluetooth BLE interface through KUP

•Multi-Plug (EU/UK) Power adaptor, 6V 1A

•Optional Alkaline Batteries, 6xAA size

•Optional rechargeable battery pack, Li-ion 3.7V 3700mAH

8 MCN-M-SH-e-2220

3.2 Keyboard overview

Button

Designation

Function

ON/OFF button

Turn on/off

HOLD button

Hold function/Calculation of a stable weight value

In menu:

•Select menu items

For numeric entry:

•Lowering numeric value

BMI button

Calculation of the Body Mass Index

In menu:

•Return to weighing mode

PRINT button

Data transfer via interface

In menu:

•Select menu items

For numeric entry:

•Increase numerical value

Function key

Function quick key

Quick call-up of a function stored before

Zeroing key

Weighing scale will be reset to „0.0“

In menu:

•Confirm selection

For numeric entry:

•Change decimal digit

•Confirm entry

TARE key

Tare balance

MCN-M-SH-e-2220 9

3.3 Installing the chair scales

Place scales on an even surface.

Check if the air bubble of the level is within the prescribed circle.

If the air bubble of the bubble level is not in the required circle, level the

balance using the adjustment feet as specified.

Check levelling regularly.

10 MCN-M-SH-e-2220

3.4 Levelling

•Levelling is restricted to specialist staff possessing well acquainted

with the workings of weighing scales.

Place scales on an even surface.

Lock brakes

Turn the wheel (1) until the air bubble of the bubble level is in the black

circle

Turn the counter nuts (2) right to the top

Indice

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