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
Operating instruction
Price computing scale
KERN RXB
Version 1.2
11/2010
GB
RXB-BA-e-1012
RXB-BA-e-1012
2
GB
KERN RXB
Version 1.2 11/2010
Operating instruction
Price computing scale
Table of Contents
1 Technical data__________________________________________________ 4
2 Declaration of conformity ________________________________________ 6
3 Appliance overview _____________________________________________ 7
3.1 Overview of display _______________________________________________ 9
3.1.1 Display weight _______________________________________________________ 10
3.1.2 Display basic price ____________________________________________________ 10
3.1.3 Display sale price _____________________________________________________ 10
3.2 Keyboard overview_______________________________________________ 11
4 Basic Information (General)______________________________________ 12
4.1 Proper use______________________________________________________ 12
4.2 Improper Use ___________________________________________________ 12
4.3 Warranty _______________________________________________________ 12
4.4 Monitoring of Test Resources ______________________________________ 13
5 Basic Safety Precautions________________________________________ 13
5.1 Pay attention to the instructions in the Operation Manual_______________ 13
5.2 Personnel training _______________________________________________ 13
6 Transport and storage __________________________________________ 13
6.1 Testing upon acceptance _________________________________________ 13
6.2 Packaging ______________________________________________________ 13
7 Unpacking, Setup and Commissioning ____________________________ 14
7.1 Installation Site, Location of Use ___________________________________ 14
7.2 Unpacking ______________________________________________________ 14
7.2.1 Setup ______________________________________________________________ 14
7.2.2 Scope of delivery _____________________________________________________ 15
7.3 Mains connection ________________________________________________ 15
7.4 Battery power supply _____________________________________________ 15
7.5 Initial Commissioning ____________________________________________ 15
7.6 Balance zero display _____________________________________________ 15
8 Operation_____________________________________________________ 16
8.1 Weighing with price determination__________________________________ 16
8.1.1 Manual input of a basic price ____________________________________________ 16
8.1.2 FIX mode – Storing a basic price _________________________________________ 17
9 Display background illumination _________________________________ 18
RXB-BA-e-1012
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10 Function menu_______________________________________________ 19
10.1 Navigation in the menu ___________________________________________ 19
10.2 Menu overview __________________________________________________ 20
10.3 Adjustment _____________________________________________________ 20
11 Verification__________________________________________________ 22
11.1 Adjustment key and seals _________________________________________ 23
12 Service, maintenance, disposal_________________________________ 24
12.1 Cleaning _______________________________________________________ 24
12.2 Service, maintenance_____________________________________________ 24
12.3 Disposal________________________________________________________ 24
13 Instant help _________________________________________________ 25
RXB-BA-e-1012
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1 Technical data
KERN RXB 3K1M RXB 3K1HM RXB 6K2M RXB 6K2HM
Readability (d) 1 g 1 g 2 g 2 g
Weighing range
(max)
3 kg 3 kg 6 kg 6 kg
Minimum load 20 g 20 g 40 g 40 g
Verification value 1 g 1 g 2 g 2 g
Verification class III III III III
Reproducibility 1 g 1 g 2 g 2 g
Linearity ± 2 g ± 2 g ± 4 g ± 4 g
Stabilization time 2 sec. 2 sec. 2 sec. 2 sec.
Recommended ad-
justing weight (not
supplied)
3 kg (M2) 3 kg (M2) 6 kg (M2) 6 kg (M2)
Net weight (kg) 4,4 4,8 4,4 4,8
300x330x110
without tripod
300x330x110
without tripod
Dimensions of the
housing (B x D x H)
300x330x110
300x330x540
with tripod
300x330x110
300x330x540
with tripod
Weighing plate,
stainless steel
300 x 225 mm
Warming up time
(operating temperature)
20 – 30 min
Weighing unit €/kg; €/100 g
Admitted ambient
temperature
-10° C to 40° C
Humidity of air 15 % - 85 % (non-condensing)
Voltage 230 V (AC)
Without backlit display:
Service life c. 200 hours / loading time ca. 8 hrs.
Rechargeable battery
With backlit display:
Operating time ca. 60h. / loading time ca. 8 hrs.
RXB-BA-e-1012
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KERN
RXB 15K5M RXB 15K5HM RXB 30K10M
RXB
30K10HM
Readability (d) 5 g 5 g 10 g 10 g
Weighing range
(max)
15 kg 15 kg 30 kg 30 kg
Minimum load 100 g 100 g 200 g 200 g
Verification value 5 g 5 g 10 10
Verification class III III III III
Reproducibility 5 g 5 g 10 10
Linearity ± 10 g ± 10 g ± 20 ± 20
Stabilization time 2 sec. 2 sec. 2 sec. 2 sec.
Recommended ad-
justing weight (not
supplied)
15 kg (M2) 15 kg (M2) 30 kg (M2) 30 kg (M2)
Net weight (kg) 4,4 4,8 4,4 4,8
300x330x110
without tripod
300x330x110
without tripod
Dimensions of the
housing (B x D x H)
300x330x110
300x330x540
with tripod
300x330x110
300x330x540
with tripod
Weighing plate,
stainless steel
300 x 225 mm
Warming up time
(operating temperature)
20 – 30 min
Weighing unit €/kg; €/100 g
Admitted ambient
temperature
-10° C to 40° C
Humidity of air 15 % - 85 % (non-condensing)
Voltage 230 V (AC)
Without backlit display:
Service life c. 200 hours / loading time ca. 8 hrs.
Rechargeable battery
With backlit display:
Operating time ca. 60h. / loading time ca. 8 hrs.
RXB-BA-e-1012
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2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: info@kern-sohn.de
Tel: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Declaration of conformity
EG-Konformitätserklärung EC-Declaration of -Conformity
EC-
Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
D
Konformitätserklärung
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
GB
Declaration of
conformity
We hereby declare that the product to which this declaration refers conforms
with the following standards.
CZ
Prohlášení o
shode
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
E
Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F
Déclaration de
conformité
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
I
Dichiarazione di
conformitá
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è conforme alle norme di seguito citate.
NL
Conformiteitverklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P
Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL
Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie
dotyczy, jest zgodny z poniższymi normami.
RUS
Заявление о
соответствии
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
Electronic Balance: KERN CXB/RXB/CXP
EU Directive Standards
2004/108/EC EN 61326-1:2006
EN 61000-3-2:2006
EN 61000-3-3:1995/A2:2005
2006/95/EC EN 61010-1:2001
Date: 12.07.2010 Signature:
KERN & Sohn GmbH
Management
KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0
Fax +49-[0]7433/9933-149, E-Mail: info@kern-sohn.com, Internet: www.kern-sohn.com
RXB-BA-e-1012
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3 Appliance overview
Models without vertical display:
Bubble level
Secondary display on customer side:
Battery compartment
Connection
network cable
ON/OFF
switch
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Models with post-mounted display:
Bubble level
Post-mounted display,
backlit, revolvable
Battery compartment
Connection
network cable
ON/OFF switch
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3.1 Overview of display
Operator display balance:
Weight Basic price
0.000
0.00
0.00
Loading status display Sales price
Secondary display on customer page:
Weight Basic price Sales price
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Post-mounted display for models with tripod:
3.1.1 Display weight
Here, the weight of your goods is displayed.
The arrows next to the symbols show:
NET
Net weight
a
Zeroing display
3.1.2 Display basic price
Here, enter your basic price in €/kg or €/100 g via keyboard. The basic price can be
switched to €/kg or €/100 g.
• Press -key, then 1 = basic price in €/kg
• Press
-key, then 2 = basic price in €/100 g
The arrows next to the symbols show:
€/kg Basic price in €/kg
€/100 g Basic price in €/100 g
3.1.3 Display sale price
Here the sales price is displayed in Euro [€].
The arrows next to the symbols show:
FIX Stored basic price//FIX mode "on"
Weight
Basic price
Sales price
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3.2 Keyboard overview
Choice Function
-
9
• Number keys, enter basic price /PLU
• Enter "00"
• Press -key, then 1 = basic price in €/kg
• Press -key, then 2 = basic price in €/100 g
• Delete total basic price
• Delete last input of basic price
• Zero key, range (±2 % max)
• Taring key
FIX
• Store set basic price
• FIX-Mode „on“/“off“
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4 Basic Information (General)
4.1 Proper use
The balance you purchased is intended to determine the weighing value of material
to be weighed. It is intended to be used as a “non-automatic“ balance, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing plate.
As soon as a stable weighing value is reached the weighing value can be read.
4.2 Improper Use
Do not use balance for dynamic weighings. In the event that small quantities are removed or added to the material to be weighed, incorrect weighing results can be displayed due to the “stability compensation“ in the balance. (Example: Slowly draining
fluids from a container on the balance.)
Do not leave permanent load on the weighing plate. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (max) of the balance,
minus a possibly existing tare load, must be strictly avoided. Balance may be damage by this.
Never operate balance in explosive environment. The serial version is not explosion
protected.
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.
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
• The appliance is modified or opened
• Mechanical damage or damage by media, liquids, natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded
RXB-BA-e-1012
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4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related 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.
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.
5.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
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
Keep all parts of the original packaging in case you need to return the appliance.
Only use original packaging for returning.
Before sending, disconnect all connected cables and loose/movable parts.
Attach possibly existing transport safeguards. Secure all parts, e.g. weighing plate,
power unit etc., to prevent slipping and damage.
RXB-BA-e-1012
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7 Unpacking, Setup and Commissioning
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:
• Place the balance on a firm, level 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 goods to be weighed or weighing container.
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
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
7.2.1 Setup
Level balance with foot screws until the air bubble of the water balance is in the prescribed circle.
RXB-BA-e-1012
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7.2.2 Scope of delivery
Serial accessories:
• Balance
• Weighing plate
• Power cable
• Protective cover
• Rechargeable battery
• Operating Manual
7.3 Mains connection
Power supply is carried out by means of the supplied power cable (220 V, 50-60 Hz).
7.4 Battery power supply
The optionally supplied battery is charged with the supplied power supply.
Before the first use, the battery should be charged by connecting it to the mains
power supply for at least 15 hours. The battery has a service life of c. 200 hours
without background lighting or 60 hours with background lighting. The charging period for total charge is c. 8 hours
The appearance of the battery symbol in the weight display indicates that the
battery is almost exhausted. If no weighing process is carried out during the red LED
display, the balance will switch off automatically after about 20-30 minutes. Connect
the power adaptor as soon as possible to change the battery.
The LED display provides information about the battery's charging status.
red: Battery is almost discharged
green: Battery is completely discharged
7.5 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. 1). During this warming up time the balance must be connected to the power supply (mains, accumulator
or battery).
7.6 Balance zero display
Environmental influences can lead to the exact figure of zero not being displayed in
spite of an empty weighing dish. It is, however, possible to reset your balance to zero
at any time and thus ensure that weighing really does commence at zero. Setting to
zero when a weight is applied is only possible within a certain type-dependent range.
In the event that the balance cannot be reset to zero with an applied weight, this
range has been exceeded (± 0,2 % max).
To reset the balance to zero, press key . A triangle [W ] pops up next to the [ a ]
symbol on the display.
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8 Operation
8.1 Weighing with price determination
As soon as the goods to be weighed are placed on the balance and the basic price
has been set the price is calculated automatically and displayed in the provided field.
8.1.1 Manual input of a basic price
Display
Operation
Weight [kg] Basic price
[€/kg]
Price [ € ]
If you are using a weighing container use the TARE key for taring
0.000 0.00 0.00
Place goods to be weighed on
balance
1.300 0.00 0.00
Enter basic price via number keys;
sales price is automatically calculated
1.300 5.00 6.50
Remove goods to be weighed;
basic price and possible tare value
will be deleted automatically after
about 2 sec. The zero display of
the balance appears in all three
display windows.
0.000 0.00 0.00
For additional weighing processes re-enter the basic price / tare value.
RXB-BA-e-1012
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8.1.2 FIX mode – Storing a basic price
When FIX -Mode is activated, the set basic price will be stored for additional weighing
processes of the same product.
Display
Operation
Weight [kg] Basic price
[€/kg]
Price [ € ]
Press FIX key, balance is in FIX
mode. A triangle [W ] pops up next
to the [FIX] symbol (FIX mode
"on") on the display.
0.000 0.00 0.00
If you are using a weighing container use the TARE key for taring
0.000 0.00 0.00
Place goods to be weighed on
balance
1.300 0.00 0.00
Enter basic price via numeric keys,
sales price will be determined
automatically and the basic price
will be stored.
1.300 5.00 6.50
Remove goods to be weighed;
basic price and possible. Tara
values will not be deleted.
0.000 5.00 0.00
Due to the basic price / tare value remaining, no further input of the basic price /
taring will be required for additional weighing processes of the same product.
Deleting stored basic price: Press CE key
Deleting stored tare value: Press TARE key
Exit FIX mode: Press FIX key, [W ] next to [FIX] is extinguished.
RXB-BA-e-1012
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9 Display background illumination
Method 1:
Adjustment Function
Auto backlight
-Press key, [ CEnTR] appears on
the weight display. Press the key
during this display.
This display will appear
backlit for weight value
> 6 d or after key was
pressed.
Display disappears after 5
sec when display moves
towards zero.
Backlight off
-Press key, [ CEnTR] appears on
the weight display. Press the key
during this display.
Backlight switched off to
save battery.
The set mode will remain after the balance was turned off.
Method 2:
Press -key for 2 sec, acoustic signal sounds 3 times. This procedure can be used
to switch between auto backlight and backlight off.
RXB-BA-e-1012
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10 Function menu
10.1 Navigation in the menu
Menu activation key (not visible)
Press this key and keep on pressing it
when balance is turned off. Whilst doing
this, turn on balance. Keep pressing down
the key until the balance counts down to
zero and the first function F0 appears.
Further functions F0 – F8 are selected by
pressing the TARE key.
Exit menu by pressing the key,
balance returns to weighing mode.
RXB-BA-e-1012
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10.2 Menu overview
F0
Not documented, settings are not allowed to be modified
Press TARE key
⇓
F1
Not documented, settings are not allowed to be modified
Press TARE key
⇓
F2
Not documented, settings are not allowed to be modified
Press TARE key
⇓
F3
Adjustment (see chap. 10.3)
Press TARE key
⇓
F4
Not documented, settings are not allowed to be modified
Press TARE key
⇓
F5
Not documented, settings are not allowed to be modified
Press TARE key
⇓
F6
Not documented, settings are not allowed to be modified
Press TARE key
⇓
F7
Not documented
, settings are not allowed to be modified
Press TARE key
⇓
F8
Not documented, settings are not allowed to be modified
10.3 Adjustment
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated - in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location
(only if the balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out for the first commissioning, after each
change of location as well as in case of fluctuating environment temperature.
To receive accurate measuring values it is also recommended to adjust the balance
periodically in weighing operation.
RXB-BA-e-1012
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Procedure when adjusting:
Attention:
In calibrated balances the adjustment function is switch locked.
To carry out calibrations, you will have to throw the unlock switch (See chpt. 11.1).
Observe stable environmental conditions. A warming up time of ca. 30 minutes is
required for stabilization. Ensure that there are no objects on the weighing plate.
• Activate the calibrating function F3 in the menu (See chpt. 10)
Weight Basic price Sales price
F3 WIDE CAL.
• Press -key, the following display will appear:
Weight Basic price Sales price
0,000 kg XXXXXX
(internal value)
• Ensure that there are no objects on the weighing plate.
• Operate menu activation key (10.1); stop check is carried out, then the weight
value of the calibrating weight will appear on the weight display
Weight Basic price Sales price
3.000
(maximum load)
Kg
(weighing unit)
XXXXXX
(internal value)
• Carefully place adjusting weight in the centre of the weighing plate
• Operate menu activation key (see chap. 10.1)
Weight Basic price Sales price
CAL. done
• While the balance is counting down to zero, remove the adjusting weight.
• The balance returns automatically into weighing mode. An error message will
appear on the display should a adjustment error occur or should the adjustment weight be incorrect. Turn balance off, then restart it and repeat the adjustment process.
Notice: Again throw the verification switch for calibrated balances.
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11 Verification
General introduction:
According to EU directive 90/384/EEC balances must be officially verified if they are
used as follows (legally controlled area):
a) For commercial transactions if the price of goods is determined by weighing.
b) For the production of medicines in pharmacies as well as for analyses in the
medical and pharmaceutical laboratory.
c) For official purposes.
d) For manufacturing final packages.
In cases of doubt, please contact your local trade in standard.
After verification the balance is sealed at the indicated positions.
Verification of the balance is invalid without the "seal/lead seal".
Verification instructions
An EU type approval exists for balances described in their technical data as verifyable. If a balance is used where obligation to verify exists as described above, it must
officially verified and re-verified in regular intervals.
Re-verification of a balance is carried out according to the respective national regulations. The validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!
Balances with obligation to verify must be taken out of operation if:
• The weighing result of the balance is outside the error limit. Therefore, in
regular intervals load balance with known test weight (ca. 1/3 of the max. load)
and compare with displayed value.
• The reverification deadline has been exceeded.
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11.1 Adjustment key and seals
When verification of a scale is finished, the positions indicated on the scale are
sealed.
Verification of a scale without a seal is invalid.
Position of seals:
SEAL
SEAL
SEAL
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12 Service, maintenance, disposal
12.1 Cleaning
Before cleaning, please disconnect the appliance from the operating voltage.
Please 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 residue sample/powder can be removed carefully with a brush or manual vacuum cleaner.
Spilled weighing goods must be removed immediately.
12.2 Service, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
Before opening, disconnect from power supply.
12.3 Disposal
Disposal of packaging and appliance must be carried out by operator according to
valid national or regional law of the location where the appliance is used.
RXB-BA-e-1012
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13 Instant help
In case of an error in the program process, briefly turn off the balance and disconnect
from power supply. The weighing process must then be restarted from the beginning.
Fault Possible cause
• The balance is not switched on.
• The mains supply connection has been
interrupted (mains cable not plugged
in/faulty).
• Power supply interrupted.
• Batteries are inserted incorrectly or empty
The displayed weight does not glow.
• No batteries inserted.
• Draught/air movement
• Table/floor vibrations
The displayed weight is permanently
changing
• Weighing plate has contact with other
objects.
•
Electromagnetic fields / static charging
(choose different location/switch off interfering device if possible)
• The display of the balance is not at zero
• Adjustment is no longer correct.
The weighing result is obviously incorrect
• Great fluctuations in temperature.
•
Electromagnetic fields / static charging
(choose different location/switch off interfering device if possible)
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
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