KERN MWA-A04 User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating manual
Hand rails with seat
KERN MWA-A04
Version 1.0
2018-09
GB
MWA-A04-BA-e-1810

2 MWA-A04-BA-e-1810
GB
KERN MWA-A04
Version 1.0 2018-09
Operating manual Hand rails with seat
Contents
1Technical data................................................................................................ 3
2Scope of delivery........................................................................................... 4
3Explanation of the graphic symbols ............................................................ 4
4Basic Information (General).......................................................................... 5
5Basic Safety Precautions.............................................................................. 8
6Transport and storage................................................................................... 8
7Unpacking/installing...................................................................................... 9
8Operation...................................................................................................... 10
9Cleaning / disinfecting................................................................................. 13

MWA-A04-BA-e-1810 3
1 Technical data
KERN (type) TMWA-A04-A
Model MWA-A04
Dimensions (D x H x W) mm 470 x 310 x 460
Dimensions completely assembled 1040 x 4530 x 1125
Seating surface 470 x 310 x 460
Net weight 8000 g
Tripod height 1125 mm
Hand rail only suitable for assembly to KERN scales MWA 300K-
100NM.
When using the MWA-A04 in combination with the scales MWA
300K-100NM, always keep in mind the operating manual of scales
MWA 300K-100NM.

4 MWA-A04-BA-e-1810
2 Scope of delivery
•Hand rail
•4 Screws
•Operating manual
•1 Ramp
3 Explanation of the graphic symbols
SN WF 18xxx Designation of the serial number of every device,
applied at the device and on the packaging.
Number here as example
2018-08
Identification of the manufacturing date of the medical
product.
Year and month here as example
„Attention observe accompanying document“, or
„Follow operating instructions“
Kern & Sohn GmbH
D – 72336 Balingen
Ziegelei 1
www.kern-sohn.com
Manufacturer’s marking of the
medical product with address

MWA-A04-BA-e-1810 5
4 Basic Information (General)
As per guideline 2014/31/EG the scales must be verified for
the following purposes. Article 1, paragraph 4. “Determination of
mass in the practice of medicine that is, weighing patients for
reasons of medical supervision during medical surveillance,
examination and treatment.”
Defined
purpose Indication: MWA-A04 in combination with scales KERN MWA 300K100NM;
•Determining the body weight in the medical practice area.
•Use as "non-standalone weighing scale", that is, e.g. a person
sits carefully onto the centre of the unfolded seating surface.
•For wheel chair scales, a wheel chair together with the person
sitting in it is pushed over the ramp into the centre of the
weighing plate and/or the electric wheel chair is moved
automatically driven onto the weighing plate.
•The assembled MWA-A04 permits the following additional
feature:
The person to be weighed can remain seated during the
weighing process
•Contraindication:
No contraindication known.
Proper use
This weighing scale is designed to determine a person’s weight in
either standing or sitting position according to the model, in medical
treatment rooms. The balance is suitable for recognising,
preventing and controlling illnesses.
The intended purpose of the seating surface is used to obtain the
body weight of persons who are not more able to stand upright.
The seating surface is not designed for long-time sitting, so it
should be unloaded directly after having obtained the weighing
value. Using the seating surface is only permitted under the
supervision of medical personnel.
Scales fitted with a serial interface may only be connected to
appliances in compliance with Directive EN60601-1.
When using the KERN MWA scales, the person to be weighed has
to step carefully onto the centre of the weighing platform.
For persons who are unsafe when standing on their legs it is
recommended that they sit on the unfolded seat. If necessary,
help the persons when they are sitting down.

6 MWA-A04-BA-e-1810
The weighing scale is designed for continuous duty.
As soon as a stable weighing value is reached the weighing value
can be read.
The weighing scale can be accessed/exited from one side.
The balance should be checked for correct condition prior to each
utilisation by a person familiar with proper operation of the balance.
Make sure that the person to be weighed does not have wet feet
(risk of slipping).
Improper Use
The hand rail has been designed to stabilize the person.
It must always be stable and be assembled according to the
description.
Additional loads are not permitted and may result in damage or
injury.
Please note:
Injury of persons or material damage:
The maximum allowed load of the folding seat is less than the
maximum admitted load of the scale.
Do not exceed the maximum admitted load on the folding seat
Do not use the folding seat when there is a risk that the person's
weight exceeds the admitted load on the folding seat
Do not use these scales for dynamic weighing processes.
Do not leave permanent load on the weighing pan.
This may
damage the measuring system.
Impacts and overloading exceeding the stated maximum load
(max) of the weighing plate, 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.
The structure of the balance may not be modified. This may lead
to incorrect weighing results, safety-related faults and destruction
of the balance.
The balance may only be used according to the described
conditions. Other areas of use must be released by KERN in
writing.

MWA-A04-BA-e-1810 7
Warranty Warranty claims shall be voided in case
•Our conditions in the operation manual are ignored
•The appliance is used outside the described uses
•The appliance is modified or opened
•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 the balance
Test device
control
In the framework of quality assurance the measuring-related
weighing properties of the balance 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.
Using measuring technology to check the accuracy of the
measuring device is recommended for personal balances with
body height measurement but is not absolutely essential as the
calculation of the human body height is always subject to a great
deal of inaccuracy.

8 MWA-A04-BA-e-1810
5 Basic Safety Precautions
Carefully read this operation manual before commissioning,
even if you are already familiar with KERN products.
Staff training The medical staff must apply and follow the operating
instructions for proper use and care of the product.
Avoiding
contamination
In order to avoid crossed contamination (fungal disease,…) the
parts coming into contact with the patient must be cleared
regularly.
Recommendation:
After every application which could have a potential
contamination as consequence (e.g. direct contact with the
skin).
6 Transport and storage
Testing upon
acceptance When receiving the appliance, please check packaging immediately, and the appliance itself when unpacking for
possible visible damage.
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 such as the weighing platform, power unit
etc. against shifting and damage.

MWA-A04-BA-e-1810 9
7 Unpacking/installing
7.1 Installation Site, Location of Use
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.
Therefore, observe the following for the installation site:
- Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
- Avoid jarring during weighing;
- Protect the appliance 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.
- Prevent static charge to device or 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. Change location or remove
source of interference.
7.2 Unpacking
Take the individual parts carefully out of their packaging and place them at the
intended position.

10 MWA-A04-BA-e-1810
8 Operation
Due to the installation of the hand rail with seat, the wheel chair scale KERN balance
MWA 300K-100NM permits safe weighing during sitting.
•For the exact handling when weighing with seat please refer to
the operating manual of the KERN balance MWA 300K-100NM.
•For using a balance with folding seat, make sure that the balance
has only one weighing ramp.
Seat folded up Seat unfolded

MWA-A04-BA-e-1810 11
8.1 Weighing with seat
Unfold folding seat
1 2
Pull out safety bolt (see fig.) Rotate the safety bolt and hook the black bolt
into the metal piece to make sure that the
balance will not be damaged by the safety
bolt
Ensure that there are no loads on the weighing plate.
Unfold seat
Make sure that the seat bearings are completely unfolded
Let the person enter the weighing surface
Ensure that the person stays without moving
Ensure that the person sits down carefully onto the centre of the seating
surface and remains quietly seated
Carry out weighing process and read the weighing value
After weighing make sure that the patient leaves the weighing surface slowly
and carefully

12 MWA-A04-BA-e-1810
Fold up the folding seat
Fold-up the seat ensuring that the safety bolt is again firmly engaged into the
provided opening in the hand rail. (See illustration)
•It is important to lock the seat correctly in order to avoid being
unfolded unintentionally.
•After weighing ensure that the seat being folded up is not
unlocked unintentionally.
•The chair bearings must be folded-in completely.

MWA-A04-BA-e-1810 13
9 Cleaning / disinfecting
9.1 Cleaning / disinfecting
Clean weighing platform (such as seat) as well as casing with household detergents
or commercially available disinfectants, e.g. 70% isopropanol. We recommend a
disinfectant suitable for wiping disinfection. Please follow manufacturer’s instructions.
Do not use abrasive or aggressive cleaners such as spirits or alcohol or similar as
they might damage the high-quality surface.
To prevent cross-contamination (fungal skin infection) please observe the following
time intervals for disinfection:
•Weighing plate before and after any measurement with direct skin contact
•When required:
oDisplay
oTouch-sensitive keyboard
Do not spray disinfectants onto appliance.
Make sure that disinfectant does not penetrate the interior of
the balance.
Remove dirt immediately.
9.2 Sterilisation
Sterilisation of the appliance not allowed.