KERN MCC 250K100NM User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instructions
Chair scale
KERN MCC
Type MCC 250K100NM
Version 1.1
2018-01
GB
MCC-BAPS-e-1811

2 MCC-BAPS-e-1811
GB
KERN MCC
Version 1.12018-01
Operating manual chair
Contents
1Technical data................................................................................................ 4
2Declaration of conformity ............................................................................. 4
3Appliance overview ....................................................................................... 5
3.1 Overview of display .................................................................................................................... 8
3.2 Keyboard overview..................................................................................................................... 9
3.3 Dimensions............................................................................................................................... 10
4Basic Information (General)........................................................................ 10
4.1 Proper use................................................................................................................................ 10
4.2 Improper Use............................................................................................................................ 11
4.3 Warranty................................................................................................................................... 11
4.4 Monitoring of Test Resources .................................................................................................. 12
5Basic Safety Precautions............................................................................ 12
5.1 Pay attention to the instructions in the Operation Manual........................................................ 12
6Transport and storage................................................................................. 12
6.1 Testing upon acceptance ......................................................................................................... 12
6.2 Packaging / return transport..................................................................................................... 12
7Unpacking, Setup and Commissioning ..................................................... 13
7.1 Place of installation / place of operation................................................................................... 13
7.2 Unpacking................................................................................................................................. 14
7.3 Scope of delivery...................................................................................................................... 14
7.4 Installing the chair scales ......................................................................................................... 14
7.4.1 Levelling ................................................................................................................................... 15
7.5 Mains connection...................................................................................................................... 16
7.5.1 Spiral cable............................................................................................................................... 17
7.6 Rechargeable battery operation............................................................................................... 18
7.7 Battery operation...................................................................................................................... 19
7.8 Insert batteries/rechargeable batteries on the example of batteries:....................................... 19
7.9 Initial Commissioning................................................................................................................ 20
8Operation...................................................................................................... 20
8.1 Weighing................................................................................................................................... 20
8.2 Taring........................................................................................................................................ 21
8.3 HOLD function.......................................................................................................................... 22
8.4 See second decimal point (not verified value) ......................................................................... 22
8.5 Calculation of the Body Mass Index......................................................................................... 23
8.5.1 Classification of BMI values ..................................................................................................... 23
8.6 Automatic switch-off function „AUTO OFF“.............................................................................. 24
8.7 Display background illumination............................................................................................... 25

MCC-BAPS-e-1811 3
9Menu ............................................................................................................. 26
9.1 Navigation in the menu............................................................................................................. 26
9.2 Menu overview ......................................................................................................................... 27
10 Error messages............................................................................................ 28
11 Service, maintenance, disposal.................................................................. 29
11.1 Cleaning ................................................................................................................................... 29
11.2 Cleaning / disinfecting .............................................................................................................. 29
11.3 Sterilisation............................................................................................................................... 29
11.4 Service, maintenance............................................................................................................... 29
11.5 Disposal.................................................................................................................................... 29
12 Instant help................................................................................................... 30
13 Adjustment................................................................................................... 31

4 MCC-BAPS-e-1811
1 Technical data
KERN (Type) MCC 250K100NM
Trademark MCC 250K100M
Readability (d) 0.1 kg
Weighing range (max) 250 kg
Reproducibility 0.1 kg
Linearity ±0.1 kg
Recommended adjustment
weight (Class) 200 kg (M1)
Weighing Units kg
Warm-up time 10 min
Electric Supply Input voltage: 100 V - 240 V AC 50 Hz
Operating temperature 0°C … + 40°C
Humidity of air max. 80 % (not condensing)
Dimensions (W x D x H) mm 625 x 990 x 935
Dimensions
Weighing surface 507 x 380 x 410
Weight kg (net) 23.3
Rechargeable battery operation Series; 6 x 1.2 V 2000 mA
Battery operation 6 × 1.5 V AA
2 Declaration of conformity
To view the current EC/EU Declaration of Conformity go to:
www.kern-sohn.com/ce

MCC-BAPS-e-1811 5
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

6 MCC-BAPS-e-1811
Details:
Parking brake opened
Parking brake closed
Adjustable footrest and foot
Accessory bag
(option)

MCC-BAPS-e-1811 7
Spiral cable
Folding arm rests

8 MCC-BAPS-e-1811
3.1 Overview of display
Display Description Description
GROSS Gross weight display Lights up during indication of the gross
weight
NET Net weight display Lights up during indication of the net weight
Illuminated after weighing scale was tared
ZERO 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.
STABLE Stability display Scales are in a steady state
BMI Body Mass Index Is actively displayed during active BMI
function
HOLD HOLD function Is displayed with active hold function
Rechargeable battery
symbol
Lights when the voltage drops below the
prescribed minimum.
Lights when the rechargeable battery
capacity is almost exhausted.
Lights when the rechargeable battery is fully
charged.

MCC-BAPS-e-1811 9
3.2 Keyboard overview
Key Description Function
ON/OFF-switch Turn on/off
HOLD button Hold function
BMI key Calculation of the Body Mass Index
In menu:
•Confirm selection
For numeric entry:
•Confirm numerical value
Function key In menu:
•Call up menu
•How to select menu items
For numeric entry:
•Increase numerical value
Zero setting key Weighing scale will be reset to „0.0“
For numeric entry:
•Change decimal place
TARE key Tare balance

10 MCC-BAPS-e-1811
3.3 Dimensions
4 Basic Information (General)
4.1 Proper use
These scales are used to determine weight of people sitting at rest,
The person should be weighed carefully and have contact with the center of the seat,
sit and stay calm.
As soon as a stable weighing value is reached the weighing value can be read.
The scales are designed for long-term usage.
Determination of the body weight.
Use as „non-standalone weighing scale“, that is, a person sits carefully onto the
seating surface’s centre. Once a steady display value is shown, you can read the
weight value.
The instruments shall only be used by people who can sit still.
The balances should be checked for correct condition prior to each utilisation by a
person familiar with proper operation of the balance.

MCC-BAPS-e-1811 11
•As long as the person is sitting on the chair scales, the wheel brakes must be
locked without fail.
•Do not step onto the foot rests when stepping or leaving the chair scales!
•The chair scales may not be used for the transport of people!
4.2 Improper Use
Do not use these scales for dynamic weighing processes.
No permanent load on the seat area. This may damage the measuring system.
Impacts and overloading exceeding the stated maximum load (max) of the seating
surface, minus a possibly existing tare load, must be strictly avoided. This could
cause damage to the balance.
Never operate balance in explosive environment. The serial version is not explosion
protected. It should be noted that a flammable mixture of anaesthetics and oxygen or
laughing gas may occur.
Do not modify the construction of the scales. This may lead to incorrect weighing
results, safety-related faults and destruction of the balances.
The balances may only be used according to the described conditions. Other areas
of use must be released by KERN in writing.
The balance must not be used to determine a body weight in practice of medicine
4.3 Warranty
Warranty claims shall be voided in case
•Our conditions in the operation manual are ignored
•The appliance is used outside the described uses
•Modification or opening of appliances
•Mechanical damage and damage caused by media, liquids,
•Natural wear and tear
•The appliance is improperly set up or incorrectly electrically connected
•The measuring system is overloaded
•Dropping of scales

12 MCC-BAPS-e-1811
4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related weighing properties of
the balances and, if applicable, the testing weight, must be checked regularly. The
responsible user must define a suitable interval as well as type and scope of this test.
Information is available on KERN’s home page (www.kern-sohn.com with regard to
the monitoring of balance test substances and the test weights required for this. In
KERN’s accredited DKD calibration laboratory test weights and balances may be
calibrated (return to the national standard) fast and at moderate cost.
5 Basic Safety Precautions
5.1 Pay attention to the instructions in the Operation Manual
Carefully read this operation manual before setup
and commissioning, even if you are already familiar
with KERN balances.
6 Transport and storage
6.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
6.2 Packaging / return transport
Keep all parts of the original packaging for a possibly required
return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Reattach possibly supplied transport securing devices.
Secure all parts against shifting and damage.

MCC-BAPS-e-1811 13
7 Unpacking, Setup and Commissioning
7.1 Place of installation / place of operation
The balances are designed in a way that reliable weighing results are achieved in
common conditions of use. You will work accurately and fast, if you select the right
location for your balance.
On the installation site observe the following:
•Place scales on a stable, even surface
•Avoid extreme heat as well as temperature fluctuation caused by installing next to
a radiator or in the direct sunlight;
•Protect the balance against direct draughts due to open windows and doors;
•Avoid jarring during weighing;
•Protect the balance against high humidity, vapours and dust;
•Do not expose the device to extreme dampness for longer periods of time. Non-
permitted condensation (condensation of air humidity on the appliance) may occur
if a cold appliance is taken to a considerably warmer environment. In this case,
acclimatize the disconnected appliance for ca. 2 hours at room temperature.
•Avoid static charge of the balance and of the person to be weighed.
•Avoid contact with water.
Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. In that case, the location
must be changed.

14 MCC-BAPS-e-1811
7.2 Unpacking
Remove the individual components of the balance or the complete balance from the
packaging with care and install at the intended location. When using the power pack,
ensure that the power cable does not produce a risk of stumbling.
7.3 Scope of delivery
•Balance
•Operating instructions
•Mains adapter
•Spiral cable
7.4 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 in the level is not in the recommended area, levelt he
scales as described in section 8.4.1 using the adjustable feet:
Check levelling regularly.

MCC-BAPS-e-1811 15
7.4.1 Levelling
Levelling can only be performed by a specialist with thorough
knowledge in handling such scales.
Place scales on an even surface.
Lock brakes
Turn the wheel (1) until the air bubble of the water balance is in the
black circle
Turn the counternuts (2) right to the top.

16 MCC-BAPS-e-1811
Gap width must not exceed 15 mm!
Block the front wheels using the adjustable feet.
7.5 Mains connection
Terminal power supply unit

MCC-BAPS-e-1811 17
Power is supplied via the external mains adapter. The printed voltage must
correspond to the local voltage.
Only approved genuine KERN power supply units may be used
The small sticker attached to the side of the display unit indicates the power port:
The LED remains illuminated as long as the weighing scale remains connected to the
mains. The LED display provides information about the battery's charging status.
Green: battery is fully charged
Blue: battery is charging
7.5.1 Spiral cable
Spiral cable used to reduce the tension of mains cable.
Application:
Installation between the mains cable (feeder) and display in ordert o reduce tension.

18 MCC-BAPS-e-1811
7.6 Rechargeable battery operation
Open the battery compartment cover (1) at the base of the display unit and insert the
rechargeable battery pack.
Charge the battery for at least 12 hours before initial use.
The appearance of the symbol in the weight display indicates that the battery
packs is almost exhausted. The weighing scale will remain ready for operation for a
few more minutes before switching off in order to save battery. Charge the battery
pack.
Voltage has dropped below prescribed minimum.
Rechargeable battery very low.
Rechargeable battery completely reloaded
If the balance is not used for a longer time, take out the battery pack and store it
separately. Leaking liquid could damage the balance.
1

MCC-BAPS-e-1811 19
7.7 Battery operation
As an alternative to rechargeable battery operation, the balance may also be
operated with 6x AA batteries.
Open battery compartment cover (1) at the lower side of the display unit and insert
batteries according to the example below. Lock the battery cover again. If the
batteries are empty, in the balance display appears the symbol . Change
batteries. To save battery power, the balance switches off automatically (see
chap.11.6 Auto off).
Capacity of batteries exhausted.
Batteries will soon be flat.
Batteries are completely charged
7.8 Insert batteries/rechargeable batteries on the example of batteries:
Remove battery compartment cover
Connect battery holder to housing
contact acc. to illustration
Insert battery holder
Insert batteries into battery compartment
and lock with battery compartment
cover.

20 MCC-BAPS-e-1811
7.9 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap. During this warming
up time the balances must be connected to the power supply (mains, accumulator or
battery) and be switched on.
The accuracy of the balance depends on the local acceleration of gravity.
The value of gravity acceleration is shown on the type plate.
8 Operation
After taking chair scales to person, ensure scales are level before starting the
weighing process. See diagram below
8.1 Weighing
Start balance by pressing
The balance will carry out a segment test.
The scales are ready for operation as soon as the weight
display for “0.0kg“ has appeared.
•However, you can reset the weighing scale to zero by pressing
the key.

Seat person in the centre of the seat pan.
Fold down the foot rests and place the person’s feet on the
respective foot rest.
Wait for stability display "STABLE", then read the weighing
result.
Once the weighing process is completed fold up the foot rests.
•If a person is heavier than the maximum weighing range, “OL”
(overload) will appear on the display screen.