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
Website: www.kern-sohn.com
Operating Instructions
Personal weighing scale, Stand on scale, Wheelchair scale, Chair
scale
KERN MPP/MTP/MWP/MCP-M
Version 1.2
03/2011
GB
MPP / MTP / MWP / MCP- M-BA-e-1112
GB
KERN MPP 200K100 M / PM / HM
KERN MTP 220K100M
KERN MWP 220K100PM
KERN MCP 220K100M / WM
Version 1.2 03/2011
Operating Instructions
Personal weighing scale, Stand on scale, Wheelchair
scale, Chair scale
Contents
1 Technical data.................................................................................................... 4
2 Declaration of conformity.................................................................................. 6
2.1 Explanation of graphical symbols...............................................................................................6
3 Basic directions (general information)............................................................. 8
3.1 Use .................................................................................................................................................. 8
3.1.1 Indication ......................................................................................................................................... 8
3.1.2 Contraindication............................................................................................................................... 8
3.2 Intended use................................................................................................................................... 8
3.3 Inappropriate use .......................................................................................................................... 9
3.4 Guarantee..................................................................................................................................... 10
3.5 Monitoring the test substances ................................................................................................. 10
4 Basic safety directions.................................................................................... 11
4.1 Observing the directions included in the Operating Instructions.......................................... 11
4.2 Staff training................................................................................................................................. 11
4.3 Avoidance of contamination ......................................................................................................11
5 Transport and storage..................................................................................... 11
5.1 Check upon delivery....................................................................................................................11
5.2 Packaging / return transport ...................................................................................................... 11
6 Unpacking, installation and starting .............................................................. 12
6.1 Place of installation, place of use..............................................................................................12
6.2 Unpacking .................................................................................................................................... 12
6.2.1 Installation and Scale Setup..........................................................................................................13
6.2.2 Scope of delivery........................................................................................................................... 20
6.3 Mains socket................................................................................................................................ 20
6.4 Battery supply operation / battery replacement....................................................................... 21
6.5 Initial start-up............................................................................................................................... 21
6.5.1 Displaying stable weighing value .................................................................................................. 21
6.5.2 Displaying zero on the operating panel.........................................................................................21
6.6 Menu settings............................................................................................................................... 22
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7 Operation...........................................................................................................23
7.1 Operating elements..................................................................................................................... 23
7.1.1 Display........................................................................................................................................... 23
7.1.2 Overview of keyboard.................................................................................................................... 24
7.1.3 View of display............................................................................................................................... 25
8 Using scale........................................................................................................25
8.1 Weighing people.......................................................................................................................... 25
8.2 Using Body Mass Index (BMI) function..................................................................................... 26
8.2.1 Classification of BMI values .......................................................................................................... 28
8.3 Tare function................................................................................................................................ 29
9 RS 232 C interface ............................................................................................30
9.1 Technical data.............................................................................................................................. 30
9.2 Manual data output with the Print key ...................................................................................... 30
10 Error messages.................................................................................................31
11 Service, maintenance, disposal.......................................................................32
11.1 Cleaning ....................................................................................................................................... 32
11.2 Service, maintenance.................................................................................................................. 32
11.3 Disposal........................................................................................................................................ 32
12 Troubleshooting................................................................................................33
13 Verification ........................................................................................................34
13.1 Adjusting...................................................................................................................................... 34
13.2 Seals ............................................................................................................................................. 35
13.3 Validity period of verification (present status in Germany).................................................... 37
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1 Technical data
KERN Personal weighing
scales MPP
Scales MTP, MWP
Display 6-position one
Read-out e = 100 g
Display LCD, 25 mm high digits
Weighing range (max) 200 kg 220 kg
Minimal load 2.0 kg
Recommended calibration
weight
180 kg (M1)
Warm-up time 10 minutes
Battery supply operation serial equipment
Automatic switching off
after
only in battery supply mode: adjustable (0-20 minutes)
Interface RS 232 C
Weighing units kg, lb
Supply voltage 100-240 V , 50/60 Hz, 400 mA
Mains adapter supply 9 V DC / 500 mA (EN 60601-1)
Operating temperature 0°C .... + 40°C
Storage temperature -30°C .… + 70°C
Air humidity max. 80% (non-condensing)
Housing of operating
panel (W x D x H) mm
182 x 155 x 95
Scale ready for operation
(W x D x H) mm
MPP-M 380x370x80
MPP-PM 380x525x1283
MPP-HM 380x525x1383
MTP-M 650x655x1130
MWP-PM 900x970x1150
Total weight (net) 8.0 / 11.5 / 12.0 kg 22.0 / 31 kg
Battery operating time 100 hours (charge time of 8 hours)
Verification according to
90/384/EEC
Medical, class III
Medical device according
to 93/42/EEC
Class I with measuring function
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KERN MCP 220K100M MCP 220K100WM
Display 6-position one
Read-out (d) 100 g
Display (high digits) LCD, 25 mm
Weighing range (max) 220 kg
Minimal load 2.0 kg
Recommended calibration
weight
180 kg
(M1)
Warm-up time 10 minutes
Battery supply operation serial equipment
Automatic switching off after only in battery supply mode: adjustable (0-20 minutes)
Interface RS 232 C
Weighing units kg, lb
Supply voltage
100-240 V , 50/60 Hz, 400 mA
Mains adapter supply 9 V DC / 500 mA (EN 60601-1)
Operating temperature 0°C .... + 40°C
Storage temperature -30°C .… + 70°C
Air humidity max. 80% (non-condensing)
Housing of operating panel
(W x D x H) mm
182 x 155 x 95
Scale ready for operation
(W x D x H) mm
600 x 790 x 950
Total weight (net) 22 kg
Battery operating time 100 hours (charge time of 8 hours)
Verification according to
90/384/EEC
Medical, class III
Medical device according to
93/42/EEC
Class I with measuring function
Wheels 2 4
Foot rest
✓ ✓
2 Declaration of conformity
Declaration of conformity: refer to the separate document with serial number of the
device
CE marking:
0297
93/42/EEC
90/384/EEC
The directive relating to non-automatic weighing instruments
year
0103
M
2.1 Explanation of graphical symbols
This EEC verification mark indicates that these scales are in
conformity with EEC Directive 90 / 384 / EEC for Non-Automatic
Weighing Instruments. Weighing instruments bearing this mark
are approved for medical purposes within the European Union.
SN WOC 09000100
Designation of the serial number of every device, applied at the
device and on the packaging
Number here as example
2009-10
Identification of the manufacturing date of the medical product.
Year and month here as example
“Please note the accompanying documents“
or “Observe operating instructions”
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Kern & Sohn GmbH
D–72336 Baligen,Germany
www.kern-sohn.com
Identification of manufacturer of medical product including address
“Electro-medical appliance“
with attachment for type B
Device protection category II
Dispose of old appliances separately from your household
waste!l!
Instead, take them to communal collection points.
+70°C
-30°C
Temperature limit indicating the upper and the lower limit
(storage temperature on packaging)
(Temperature serving as an example)
15 V DC / 300 mA
Display of supply voltage for scales with polarity display
(Polarity and values serving as an example)
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3 Basic directions (general information)
According to the Directive 90/384/EEC scales must be verified to the
following application purposes. Article 1, paragraph 4 „Determination of
weight in the course of medical practice i.e. weighing of patients for the
purpose of health monitoring, diagnosis and medical treatment.”
3.1 Use
3.1.1 Indication
- Determination of body weight in the course of medical practice.
- Used as a non-automatic scale i.e. a person is to be placed carefully in the centre of
the scale plate or in the suitable supporting device in the case of wheelchair or chair
scales. In the case of baby scales, a baby is to be always laid down or seated on the
scale pan. The weighing value can be read off after a stable weighing value has been
obtained.
3.1.2 Contraindication
No contraindications.
3.2 Intended use
These scales are used to determine weight of people in standing and sitting position or
babies in lying position depending on the model in rooms intended for carrying out
medical care. The scales are intended to diagnose, prevent and monitor diseases.
The scales equipped with serial interface can only be connected to the
equipment compliant with EN60601-1 standard.
In the case of personal weighing scales, a person to be weighed is to be placed carefully in the centre of the scale plate and left at rest or in the case of chair scales, a person should be seated in the centre of seat and left at rest.
In the case of wheelchair scales, place a wheelchair entirely on the platform and then
lock its wheels before carrying out weighing procedure.
The weighing value can be read off after a stable weighing value has been obtained.
The scale is designed for continuous operation.
The scale platform can only be walked on by people that can stand on it securely with both feet, or sit calmly (in the case of chair scale).
Scale platforms or footrests are equipped with anti-slip material which cannot
be removed or covered when people are weighed.
When scales equipped with height measure are used, pay attention that the top flap is
always folded down after their use to avoid danger of injury.
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The chair scales may not be used for the transport of people!
As long as the patient is remaining on the chair scales, the
wheel brakes must be locked without fail.
Before any use, the scale must be checked for correct condition by an authorised
person.
3.3 Inappropriate use
Do not use the scales for dynamic weighing.
Do not leave a permanent load on the weighing plate. This can damage the measuring
equipment.
Be sure to avoid impact shock and overloading the scale in excess of the prescribed
maximum load rating (max.), minus any possible tare weight that is already present.
This could result in damage of the scale.
Never operate the scale in hazardous locations. The series design is not explosionproof. Attention should be paid that flammable mixture may also be formed from
anaesthesiological means that contain oxygen or laughing gas (nitrous oxide).
Construction alterations may not be made to the scale. This can lead to incorrect weighing results, faults concerning safety regulations as well as to destruction of the scale.
The scale may only be used in compliance with the described guidelines. Other areas of
application/planned use must be approved by KERN in writing.
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3.4 Guarantee
The guarantee shall become void in the event of the following:
• non-observation of our guidelines in the Operating Instructions,
• use outside the described applications,
• alteration to or opening of the device,
• mechanical damage or damage caused by media, liquids, usual wear and tear,
• inappropriate erection or electric installation,
• overloading of the measuring equipment,
• scale falling down (pay attention to information label on the platform scales).
3.5 Monitoring the test substances
The metrology features of the balance and any possible available adjusting weight must
be checked at regular intervals within the scope of quality assurance. For this purpose,
the responsible user must define a suitable interval as well as the nature and scope of
this check. 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. Test weights and balances can be adjusted quickly and at a reasonable price at
KERN’s accredited DKD (Deutsche Kalibrierdienst) calibration laboratory (return to national standard).
In the case of the scales for weighing people provided with the scale to determine a
body size, it is recommended to carry out the check of its measuring accuracy because
determination of the human body size is always connected with a very large inaccuracy.
4 Basic safety directions
4.1 Observing the directions included in the Operating Instructions
Please read these Operating Instructions carefully before erecting and commissioning
the balance, even if you already have experience with KERN medical scales.
4.2 Staff training
The device may only be operated and maintained by trained members of staff.
4.3 Avoidance of contamination
To avoid cross contamination (mycosis,...), the scale plate is to be cleaned regularly.
Recommendation: after each weighing which could result in potential contamination
(e.g. when there is a direct skin contact during weighing).
5 Transport and storage
5.1 Check upon delivery
Please check the packaging immediately upon delivery and the device during unpacking
for any visible signs of external damage.
5.2 Packaging / return transport
Ö Keep all parts of the original packaging for a possibly required re-
turn.
Ö Only use original packaging for returning.
Ö Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Ö Reattach possibly supplied transport securing devices.
Ö Secure all parts such as the glass wind screen, the weighing plat-
form, power unit etc. against shifting and damage.
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6 Unpacking, installation and starting
6.1 Place of installation, place of use
The scale is designed in such a way that reliable weighing results can be achieved under normal application conditions.
By selecting the correct location for your scale, you will be able to work quickly and precisely.
Therefore, please observe the following when choosing a place of installation:
• Place the scale on a firm, level surface;
• Avoid extreme heat as well as temperature fluctuation caused by installing the
scale next to a radiator or in the direct sunlight;
• Protect the scale against direct draughts due to open windows and doors;
• Avoid shaking during weighing;
• Protect the scale against high humidity, vapours and dust;
• Do not expose the device to extreme dampness for longer periods of time. In-
admissible bedewing (condensation of air moisture on the device) can occur if a
cold device is taken into a significantly warmer environment. In this case, please
keep the device for approx. 2 hours at room temperature after it has been disconnected from mains supply;
• Avoid static charge build-up on people to be weighed;
• Avoid contact with water.
Major display deviations (incorrect weighing results) are possible if electromagnetic fields
occur (e.g. coming from mobile phones or radio equipment) as well as due to static
charging and instable power supply. It is necessary then to change the scale
location or remove disturbance source.
6.2 Unpacking
Carefully remove individual scale parts or the whole scale from its packaging and position the scale in its intended working location. When the mains adapter is used, be careful not to cause the danger of falling over the power cable.
6.2.1 Installation and Scale Setup
Personal weighing scales – MPP models:
The scale is delivered together with the wall bracket.
Personal weighing scales - MPP model with stand:
In the case of personal weighing scales with a stand, loose the suitable screw at each
stand joint with the delivered hexagonal spanner (5 mm) until the tooth coupling makes
it possible to set the stand. When the stand is set in vertical position, retighten this
screw or screws so that the teeth come into close engagement.
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Personal weighing scales - MPP model with height measure:
Scope of delivery:
Insert the height measure into the hole in the scale housing. Insert the screw in the
scale bottom and tighten it.
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Insert another 4 mm screw through the stand into the fixing clip of the height measure
and tighten it.
The flap of the height measure can be tightened firmly or slightly loosened with 2 mm
screwdriver depending on whether a user wants a flap to be stable or fall down automatically immediately after its use.
Note:
In the case of the stable and projecting flap there is a risk of personal injuries.
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Scale with stand – MTP models:
Scope of delivery:
First set the articulated bars in the way described for the personal weighing scale.
Additionally, fix two side bow bars on the stand and tight them firmly with 4 delivered
screws.
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Installation of the side bow bars to the stand.
Fix the side bow bars from the platform bottom.
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Wheelchair scale - MWP models
The scale is delivered completely pre-assembled.
Before setting up the scale, loose screw connections with the handles and then retighten them.
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The scale in the set up Space-saving position used
position and ready for use. for scale storage.
Chair scale - MCP models
The scale is delivered completely pre-assembled.
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General direction concerning setting up the previously mentioned scales
Place a personal weighing scale in the intended location and level it with the adjustable
rubber feet until the air bubble in the spirit level (located in the centre of the scale plate)
is in the centre.
When scales with large and heavy platforms are installed and transported (a scale plate
folded upwards), take care not to drop a scale as this could cause its damage.
The following information label is located on the platform side.
Attention should be paid to lower the platform slowly on the floor and avoid
its falling down during this operation.
When the mains adapter is not used (and wall holder not installed), put the mains
adapter into the compartment located on the back wall of the operating panel to store it.
6.2.2 Scope of delivery
Standard accessories:
• Mains adapter (complaint with EN 60601-1 standard)
• Operating Instructions
6.3 Mains socket
Power supply is carried out by means of the external mains adapter which also provides
separation between mains and a scale. The printed voltage value must be
compliant with local voltage.
Use only admitted and original KERN mains adapters compliant with EN 60601-1
standard.
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6.4 Battery supply operation / battery replacement
The delivery scope of the scale includes the mains adapter which is inserted in the back
wall of the operating panel.
The mains adapter is used to supply the scale directly or charge a battery which is also
included in the delivery scope.
When the BAT message appears on the display, connect the mains adapter immediately because the battery charge condition is very low. As a result of that, the scale is
supplied from mains and battery is charged at the same time.
Total charging of the battery (6 V, 3.2 Ah) requires at least 8 hours. The battery charge
condition is displayed with the red LED located next to the plug for the mains adapter.
When the battery is fully charged, the LED colour changes into green. The operation
time of the scale supplied from battery is about 100 hours.
The battery is located inside the operating panel. After replacement, the verification
marks must be renewed or it is recommended, if required, to replace the battery before
the next verification.
Replacements in those scales can only be carried out by the trained service personnel.
6.5 Initial start-up
To obtain accurate weighing results with electronic scales, the appropriate operating
temperature is to be provided for them (refer Warm-up time, section 1).
During warm-up the scale must be connected to power supply and switched on (mains
socket or battery).
The accuracy of the scale depends on the local acceleration of gravity.
The value of acceleration of gravity is given on the rating plate.
6.5.1 Displaying stable weighing value
When the scale plate is loaded, the display reading is seen after reaching the stable
weighing value.
To achieve that the special filters are used, which make it possible to display weight
correctly also when active children or people are weighed.
6.5.2 Displaying zero on the operating panel
If in spite of unloaded scale plate, the personal weighing scale does not display zero
value accurately, press the a key and the ZERO display zeroing will be started. If
the scale load is higher than 2% of the maximal load, then the scale can also be zeroed
with the TARE key.
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6.6 Menu settings
To select this mode when the scale plate is unloaded, press the Wiederholen (Repeat)
key and the Menu will be displayed.
3 possibilities of settings are at a user’s disposal:
MEnU -> LIvE -> FrEEZE -> t-OFF -> SAvE
Operation Display
The scale is in the weighing mode,
the scale plate is unloaded, press the Wiederholen (Repeat) key
MEnU
Press the Wiederholen (Repeat) key
LIvE - OFF
(alternately)
Initial settings can be changed with the kg/lb key
OFF = people weighing mode is activated (display seen at stable
weighing value) (standard setting)
On = direct displaying mode is activated (weighing value is not stored)
OFF
Press the Wiederholen (Repeat) key
FeEEZE - On
(alternately)
Initial settings can be changed with the kg/lb key
On = the last weighing value is stored after unloading the scale plate,
reset is done with the a key
OFF = after unloading the scale plate, the value of 0,0 kg is displayed
again
On
Press the Wiederholen (Repeat) key
t-OFF - 2
(alternately)
Time of automatic switching off can be set here (time in minutes, after
which the scale automatic switching off occurs if no weighing is performed).
Initial settings can be changed with the kg/lb key.
Pressing the kg/lb key will reset the set value again to 0.
(0 means no switching off)
The repeated long pressing the kg/lb key will increase the set value
within the range 0…9. To enter 10 or 20, select 1 or 2, and then press
shortly the particular key twice.
0
1
10
Press the Wiederholen (Repeat) key
SAvE
Press the Wiederholen (Repeat) key, the Done (No) symbol will be displayed for 1 second, and after displaying the StArt symbol, the repeated
return to the normal weighing mode occurs.
Done
0,0 kg
To leave the menu without storing, press the BMI key when the Menu word is
displayed at the beginning of setting.
7 Operation
7.1 Operating elements
7.1.1 Display
Example: Personal weighing scale MPP
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7.1.2 Overview of keyboard
Key Marking Operation Function
ON/OFF
Switching on: short
pressing the key
Switching off: long
pressing the key
SWITCHING ON or
SWITCHING OFF the
scale
→0←
When the scale is
switched on, press the
key shortly
Zeroing the scale display to perform next
weighing
BMI
When the scale plate is
loaded, press the key
shortly
Calculation of BMI (determination of weight
and height of person’s
body)
TARE
When the scale plate is
loaded: hold the key
pressed for 3 seconds
When the scale plate is
unloaded: press the key
for 1 second and then
release it
Direct taking over the
tare value, display of
0,0 kg
The displayed value of
the set initial tare of
15,0 kg can be
changed with the arrow
keys; to take over,
press the TARE key
again, the set value is
seen with negative sign.
Wiederholen
(Repeat)
Short pressing the key
Will repeat the weighing
process without leaving
the scale plate
Down arrow
Short pressing the menu
key
Will decrease the displayed value (body
height) by 0.5 cm
kg/lb
Short pressing the key
Will switch over the
weight unit
Up arrow
Short pressing the menu
key
Will increase the displayed value (body
height) by 0.5 cm
PRINT
Long pressing the key
Data output via RS232
interface
To switch on the scale (when the scale plate is unloaded), press the ON/OFF key. The
Start symbol is displayed and diagnostic scale self-check is performed. When selfcheck is in progress, first all elements of display are shown. It is followed by software
version and then value of 0,0 kg is displayed.
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7.1.3 View of display
Display Description
• ZERO • Scale plate is loaded and ready to weigh
• TARE • Tare function is active
• BAT • Battery is discharged, it is to be charged
• kg/lb • Displaying weight units
• < > • Stable weighing value has been reached
8 Using scale
8.1 Weighing people
1. Switch on the scale with the ON/OFF key. The display will show the Start symbol, display test, version number, and finally 0,0 kg.
2. Position a person on the scale plate. The display will show the WEIGH symbol,
and then a person weight. An audible signal and small arrows at both sides of the
display indicate completion of weight determination.
3. If it is necessary, weighing can be repeated by using the Wiederholen
(Repeat) key.
4. With the kg/lb key it is possible to switch over a weight unit from kilograms to
pounds or vice versa.
5. Long holding (3 seconds as minimum) the ON/OFF key pressed will switch off
the scale again.
8.2 Using Body Mass Index (BMI) function
In order to calculate BMI the patient's height must be measured. If height is previously
known it can be entered into the scale directly, if not then it can be measured using the
height rod function MPP200K100HM. To measure the height, slide the height measure
up and set the flap horizontally. Slide the height measure down carefully until the flap
touches a person head (it is recommended to carry out measurement without shoes).
Then read the body height on the height measure. Refer to the following pictures.
For body height up 113 cm
For body height over 113 cm
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1. To determine BMI value, a person is to be weighed in the way described in the
previous section. Then press the BMI key and the display will show the body
height initially entered of 170 cm. To change the height initially entered, press the
Up arrow or Down arrow key. Each key pressing changes the
present value by 0.5 cm. Holding the keys pressed alter the change speed, first
slowly and then quickly.
2. To display the calculated BMI value, press the BMI key now. The BMI value is
displayed (BMI and its value are displayed alternately).
3. To display a person’s body weight again, press the BMI key once again. The
scale returns to the normal weighing mode.
Conversion of BMI for feet and inches:
1. Weigh a person in the way described previously and set a weight unit to lb.
2. Then press the BMI key and a body height of 5 feet will be displayed. To change
this set value initially entered, press the Up arrow or Down arrow” key until the
required body height is displayed. The value is changed by 1 each time. Then
press the BMI key.
3. The display will show the value of 7 inches. To change this set value initially entered, press the Up arrow or Down arrow” key until the required body height is
displayed (the value is changed by 0.5 inch each time).
4. Then press the BMI key and the height entered e.g. 5 feet and 9 inches will be
displayed as 5 - 09.0.
5. To display the calculated BMI value, press the BMI key now. The BMI value is
displayed (BMI and its value are displayed alternately).
6. To display a person’s body weight again, press the BMI key once again. The
scale returns to the normal weighing mode.
The person’s height entered is stored for the next calculation.
The standard value is returned by switching off and on again.
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8.2.1 Classification of BMI values
Classification of weight for adults over 18 years on the basis of Body Mass Index
according to WHO, 2000 EK IV and WHO 2004 (WHO - World Health Organization).
Category BMI (kg/m2) Risk of diseases accompanying
overweight
Underweight < 18.5 low
Normal weight 18.5 – 24.9 average
Overweight
Preobesity
I degree of obesity
II degree of obesity
III degree of obesity
> 25.0
25.0 – 29.9
30.0 – 34.9
35.0 – 39.9
> 40
slightly increased
increased
high
very high
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8.3 Tare function
The Tare function is used to let you subtract the additional weight, located on the scale
platform in addition to a person, e.g. wheelchair.
This function can be performed manually or automatically.
A: manual Tare function
1. The scale is in weighing mode with unloaded scale plate,
0,0 kg and ZERO values are displayed at the top left side.
2. Then press the BMI/TARE key shortly and the display will show the tArE
symbol. This symbol is displayed alternately with the set value of 15,0 kg / 33 lb
which can be increased or decreased e.g. to set a wheelchair weight. The Up ar-
row key increases and the Down arrow key decreases the set value.
3. When the required weight value is obtained, press the BMI/TARE key and the
programmed value will be shown on the display with a negative sign. Then position a patient with and additional weight on the scale plate (patient in wheelchair)
and read a value after successful weighing.
4. To finish the manual „Tare” function, remove all weights from the scale plate and
then hold the BMI/TARE key pressed for 3 seconds. The display will show the
WEIGH symbol and then 0,0 kg value.
5. The scale returns to normal weighing mode.
B: automatic Tare function
1. When the scale display with the unloaded scale plate will show the 0,0 kg value,
position e.g. a wheelchair on the scale plate. The display will show the WEIGH
symbol and then wheelchair weight.
2. Then press and hold the BMI/TARE key pressed for at least 3 seconds. The
display returns to the 0,0 kg value, and the TARE symbol is shown at the left
side of the display.
3. When a wheelchair is removed form the scale plate, the weight with the preceding negative sign is displayed.
4. After that position a wheelchair or additional weight together with a patient on the
scale plate. When weighing is finished successfully, the display will show
directly a patient weight without a wheelchair or additional weight.
5. The wheelchair weight is saved in the memory and therefore it is possible to
weigh next patients in the same wheelchair.
6. To finish this Tare function, remove all weights from the scale plate and then hold
the BMI/TARE key pressed for at least 3 seconds. The display will show the
WEIGH symbol and then 0,0 kg value. The stored tare value is also cancelled after switching off the scale.
7. The scale returns to normal weighing mode.
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9 RS 232 C interface
Only additional devices which are compliant with EN 60601-1 standard can be
connected.
The interface cable is delivered together with the scale as standard.
9.1 Technical data
9600 bauds,
8 data bits,
1 stop bit,
no parity,
no handshake,
8-bit ASCII code for data.
9.2 Manual data output with the Print key
When the PRINT key is pressed (for 3 seconds until two audible signals is heard), a
user may start manual data output.
Printing in weighing mode :
(not in BMI mode)
91,5 kg
Printing in BMI mode:
(active BMI or BMI was determined earlier with presently displayed weight)
GROSS WEIGHT 91,5 kg
TARE WEIGHT 0,0 kg
NET WEIGHT 91,5 kg
PATIENT HEIGHT 187,5 cm
PATIENT B.M.I. 26.0
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10 Error messages
„StOP“
Weighing range is exceeded
„------“
Underload
„LO BAT“
Battery is discharged and requires charging.
„ERR / BMI“
Error during BMI calculation
(data entered are incorrect).
BMI value is outside the range of 10...99.
Err2
Load cell is incorrectly connected.
Check cable and mechanical connections.
Err3
Refer to Err2
Err6
No stable weighing value, adjusting is not possible.
Check cable connections and load cell environment for contact
with other elements
Err7
Mathematical error during adjusting (it occurs when adjusting is
tried without a calibration weight)
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11 Service, maintenance, disposal
11.1 Cleaning
Please disconnect the device from the power supply source before cleaning.
Do not use aggressive cleaning agents (solvents or similar agents), but a cloth dampened with mild soap suds. Ensure that no liquid penetrates into the device and wipe with
a dry soft cloth.
Loose impurities can be removed carefully by using a brush or hand vacuum cleaner.
Do not tilt or turn the scale to carry out its cleaning because this may result in the scale
damage.
To avoid cross contamination (mycosis, ...), the scale plate is to be cleaned regularly.
Recommendation: after each weighing which could result in potential contamination
(e.g. when there is a direct skin contact during weighing).
Remove any impurities immediately.
11.2 Service, maintenance
The device may only be opened and maintained by trained service technicians who are
authorised by KERN.
Disconnect the scale from mains supply before its opening.
11.3 Disposal
Disposal of packaging, batteries and device must be carried out according to valid national or regional law of the location where the device is used.
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12 Troubleshooting
The scale should be switched off for a short time following an interruption in the program sequence and disconnected from mains supply. It is then necessary to repeat the
weighing process from the beginning.
Interruption Possible cause
Weight display is not illuminated.
• The scale is not switched on.
• The mains supply connection has been interrupted
(mains cable not plugged in/faulty).
• Mains failure.
• Batteries are incorrectly inserted or discharged
• No batteries.
Weight display changes
continuously
• Draught/air movement
• Table/floor vibrations
• The weighing plate is in contact with foreign mat-
ters or is installed incorrectly.
• Electromagnetic fields/static charging (choose a
different location for the scale, switch off an interfering device if possible)
The weighing result is
obviously incorrect
• The scale display is not set to zero
• Incorrect adjustment.
• Great fluctuations in temperature.
• Warm-up time was ignored.
• Electromagnetic fields/static charging (choose a
different location for the scale, switch off an interfering device if possible)
Should other error messages occur, switch the scale off and then on again. If the error
message remains, inform the manufacturer.
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13 Verification
If a scale is verified, then a verification office or manufacturer puts a verification mark
and one or several seals (seals are damaged during removal) on the housing.
Therefore, scale adjusting without a seal loss is not possible.
13.1 Adjusting
To perform necessary adjusting, the following procedure should be used:
First remove and insert back the jumper on the plate.
Operation Display
Switch on the scale with the [ON/OFF] key.
StArt
When the display shows the StArt symbol, press the
kg/lb and Wiederholen (Repeat) keys simultaneously
and hold them pressed for at least 3 seconds.
When the display shows the „CAL” symbol, release the
keys.
Press the Wiederholen (Repeat) key
CAL
The display shows the „LOAD” symbol alternately with
calibration weight initially set.
LOAd
/
xx.x kg
To set the calibration weight recommended in section
1, follow the following way (as an example).
Press and hold the kg/lb key pressed until counting
upwards the right number occurs. Release the key
when the required number is displayed. Pressing
shortly the kg/lb key twice will move the displayed
value to the left side.
Press and hold the kg/lb key pressed until counting
upwards the right number occurs. Release the key
when the required number is displayed. Pressing
shortly the kg/lb key twice will move the displayed
value to the left side.
0,0 kg
0,1 kg
1,0 kg
1,8 kg
18,0 kg
180,0 kg
Important: Scale plate must be unloaded.
Press the „Wiederholen” (Repeat) key
CLEAr
Press the Wiederholen (Repeat) key
--------
(Calibration weight is displayed)
PUT
/
180,0 kg
Put the calibration weight in the centre of the scale
plate, and then press the Wiederholen (Repeat) key.
CAL
FACtOr
/
x,xxxx
Press the Wiederholen (Repeat) key SAvE
Press the Wiederholen (Repeat) key dOnE
StArt
0,0 kg
Remove the calibration weight from the scale plate.
0,0 kg
Direction: The procedure described above can be stopped at any time by pressing the
kg/lb and Wiederholen (Repeat) keys simultaneously.
13.2 Seals
The scales with a separate operating panel have verification labels on the housing
connections and screws.
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In the case of chair scales, the load cell is protected on bottom by using the protective
wire and seal.
Platforms are protected against opening by means of 1 or 2 protection marks located on
the bottom.
Damage or removal of a seal invalidates the verification.
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13.3 Validity period of verification (present status in Germany)
Personal weighing scales in hospitals 4 years
Personal weighing scales if placed outside hospitals without time limit
Baby and mechanical scales Infant scales 4 years
Bed scales 2 years
Wheelchair scales 2 years
The hospitals also include rehabilitation clinics
(4-year validity of verification).
The hospitals do not include dialysis centres, care homes and consultation rooms
(verification validity without time limit).
(Data on the basis: „Verification office informs, scales in medical applications”)
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