KERN RXB User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]
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
1Technical data__________________________________________________ 4
2Declaration of conformity ________________________________________ 6
3Appliance 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
4Basic Information (General)______________________________________ 12
4.1 Proper use______________________________________________________ 12
4.2 Improper Use ___________________________________________________ 12
4.3 Warranty _______________________________________________________ 12
4.4 Monitoring of Test Resources ______________________________________ 13
5Basic Safety Precautions________________________________________ 13
5.1 Pay attention to the instructions in the Operation Manual_______________ 13
5.2 Personnel training _______________________________________________ 13
6Transport and storage __________________________________________ 13
6.1 Testing upon acceptance _________________________________________ 13
6.2 Packaging ______________________________________________________ 13
7Unpacking, 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
8Operation_____________________________________________________ 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
9Display background illumination _________________________________ 18

RXB-BA-e-1012 3
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
4
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 tempera-
ture) 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 5
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 tempera-
ture) 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
6
2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: [email protected]
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 осоответствии
D Konformitäts-
erklärung
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 riferi-
sce è conforme alle norme di seguito citate.
NL Conformiteit-
verklaring
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, ккоторому 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: [email protected], Internet: www.kern-sohn.com

RXB-BA-e-1012 7
3 Appliance overview
Models without vertical display:
Bubble level
Secondary display on customer side:
Battery compartment
Connection
network cable
ON/OFF
switch

RXB-BA-e-1012
8
Models with post-mounted display:
Bubble level
Post-mounted display,
backlit
,
revolvable
Battery compartment
Connection
network cable
ON/OFF switch

RXB-BA-e-1012 9
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

RXB-BA-e-1012
10
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
aZeroing 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

RXB-BA-e-1012 11
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“

RXB-BA-e-1012
12
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 mate-
rial 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 re-
moved or added to the material to be weighed, incorrect weighing results can be dis-
played 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 dam-
age 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 weigh-
ing 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 13
4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the bal-
ance and, if applicable, the testing weight, must be checked regularly. The responsi-
ble user must define a suitable interval as well as type and scope of this test. Infor-
mation 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 appli-
ance 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
14
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 electric-
ity 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 pre-
scribed circle.

RXB-BA-e-1012 15
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 pe-
riod 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 warm-
ing 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.

RXB-BA-e-1012
16
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 con-
tainer 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 calcu-
lated
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 17
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 con-
tainer 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
18
9 Display background illumination
Method 1:
Adjustment Function
Auto back-
light
-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 19
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
20
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.