KERN EMB-S Series 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 instructions
Precision balances
KERN EMB-S
Version 2.1
2021-03
GB
EMB-S-BA-e-2121

EMB-S-BA-e-2121
2
GB
KERN EMB-S
Version 2.12021-03
Operating instructions - Precision balances
Contents
1Technical data................................................................................................ 3
2Basic Information (General).......................................................................... 5
2.1 Intended use.............................................................................................................. 5
2.2 Improper Use............................................................................................................. 5
2.3 Warranty.................................................................................................................... 5
2.4 Monitoring of Test Resources.................................................................................... 6
3Basic Safety Precautions.............................................................................. 6
3.1 Pay attention to the instructions in the Operation Manual .......................................... 6
3.2 Personnel training...................................................................................................... 6
4Transport and storage................................................................................... 6
4.1 Testing upon acceptance........................................................................................... 6
4.2 Packaging / return transport....................................................................................... 6
5Unpacking, Setup and Commissioning ....................................................... 7
5.1 Installation Site, Location of Use................................................................................ 7
5.2 Unpacking.................................................................................................................. 8
5.2.1 Placing........................................................................................................................................ 8
5.2.2 Scope of delivery........................................................................................................................ 8
5.3 Overview of display.................................................................................................... 8
5.4 Keyboard overview .................................................................................................... 9
5.5 Transport Securing.................................................................................................... 9
5.6 Battery operation (Standard).....................................................................................10
5.7 Mains connection (option).........................................................................................10
5.8 Initial Commissioning................................................................................................10
5.9 Adjustment................................................................................................................11
6Operation...................................................................................................... 13
6.1 Weighing...................................................................................................................13
6.2 Taring .......................................................................................................................13
6.3 Weighing Units..........................................................................................................14
7Menu ............................................................................................................. 14
7.1 Navigation in the menu.............................................................................................14
7.2 Description of individual menu items.........................................................................15
7.2.1 AUTO OFF function.................................................................................................................. 15
7.3 Zero-Tracking ...........................................................................................................15
7.4 Reset function...........................................................................................................16
8Servicing, maintenance, disposal .............................................................. 16
8.1 Cleaning ...................................................................................................................16
8.2 Servicing, maintenance.............................................................................................16
8.3 Disposal....................................................................................................................16
9Instant help................................................................................................... 17
10 Declaration of Conformity........................................................................... 18

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1 Technical data
KERN EMB
200-1S
EMB
500-1S
EMB
2000-0S
EMB
5000-0S
Readability (d) 0,1 g 0,1 g 1 g 1 g
Weighing range (max) 200 g 500 g 2000 g 5000 g
Reproducibility 0.01 g 0.1 g 0.01g 0.01 g
Linearity ± 0.2 g ± 0.2 g ± 2 g ± 2 g
Recommended adjustment
weight, not added (class) 200 g
(M1)
500 g
( M2 )
2000 g
(M1)
5000 g
( M2 )
Stabilization time (typical) 2-3 sec.
AUTO-OFF-function
(With battery operation)
3 min.
Units dwt, g, oz, ozt
Operating temperature +5°C… +35°C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 145 x 205 x 45
Weighing plate mm Ø 120
Battery operation (Standard) 2 x 1.5 V AA
Operating period: 12 h
Mains adapter (Option) 300 mA / 9 V
Underfloor weighing Hooks

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KERN EMB
500-2S
EMB
3000-1S
Product No / Type TEMB
500-2S-A
TEMB
3000-1S-A
Readability (d) 0,01 g 0,1 g
Weighing range (max) 500 g 3000 g
Reproducibility 0,01 g 0,2 g
Linearity ± 0,03 g ± 0,3 g
Recommended adjustment
weight, not added (class)
500 g
(F2)
3000 g
(F2)
Stabilization time (typical) 2-3 sec.
AUTO-OFF-function
(With battery operation)
3 min.
Units dwt, g, oz, ozt
Operating temperature +5°C… +35°C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 145 x 205 x 45
Weighing plate mm Ø 120
Battery operation (Standard) 2 x 1.5 V AA
Operating period: 12 h
Mains adapter (Option) 300 mA / 9 V
Underfloor weighing Hooks

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2 Basic Information (General)
2.1 Intended 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
pan. As soon as a stable weighing value is reached the weighing value can be read.
2.2 Improper Use
Do not use balance for dynamic weighing. 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“. (Example: Slowly draining fluids from a
container on the balance.)
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 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.
2.3 Warranty
Warranty claims shall be voided in case
- Our conditions in the operation manual are ignored
- Appliance used outside the described uses
- Appliance modified or opened
- Mechanical damage and damage caused by media, liquids
- Natural wear and tear
- Appliance improperly set up or incorrectly electrically connected
- Measuring system overloaded

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2.4 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.
3 Basic Safety Precautions
3.1 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.
3.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
4 Transport and storage
4.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
4.2 Packaging / return transport
Keep all parts of the original packaging for a possibly required
return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Reattach possibly supplied transport securing devices.
Secure all parts such as the glass wind screen, the weighing
platform, power unit etc. against shifting and damage.

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5 Unpacking, Setup and Commissioning
5.1 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 charging of the material to be weighed, weighing container
and windshield.
If electro-magnetic fields or static charge occur, or if the power supply is unstable
major deviations on the display (incorrect weighing results) are possible. In that case,
the location must be changed.

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5.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
5.2.1 Placing
The balance must be installed in a way that the weighing plate is exactly in horizontal
position.
5.2.2 Scope of delivery
Serial accessories:
KERN EMB-S
•Balance
•Batteries (2 x 1.5V AA)
•Operating instructions
5.3 Overview of display
1
Stability display
2
Negative value
3
Balance set at zero
4
Net weight
5
Capacity display
6
Weighing Units

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5.4 Keyboard overview
•Switch on balance
•Tare balance
•
How to change weighing units
•Switch off the balance
•Adjustment menu access (longer pressing of the button)
5.5 Transport Securing
Before putting into operation, unlock the transport locking device on underside of
weighing scale, see illustration below:
Transport Securing
Transport locking device locked
During transport of weighing scale
Transport security loosened
In weighing mode
If
the transport locking device remains locked in weighing mode, an error
message “E“ will appear on reaching max load.

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5.6 Battery operation (Standard)
Remove battery cover on the underside of the weighing pan. Insert 2 x 1.5 V
batteries. Reinsert the battery cover.
In order to save the battery, the balance switches automatically off after 3 minutes
without weighing.
If the batteries are run down, "LO" appears in the display. Press button and
replace the batteries immediately.
If the balance is not used for a longer time, take out the batteries and store them
separately. Leaking battery liquid could damage the balance.
5.7 Mains connection (option)
Power supply is provided by the external power supply unit KERN YKA-03 (optional).
The stated voltage value must be the same as the local voltage.
Only use original KERN mains adapters. Using other makes requires consent by
KERN.
5.8 Initial Commissioning
A warming up time of 3 minutes after switching on stabilizes the measuring values.
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter “Adjustment”.

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5.9 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.
With an adjustment weight, the weighing accuracy can be checked and re-adjusted
at any time.
Procedure when adjusting:
Observe stable environmental conditions. Stabilisation requires a certain warm-up
time.
Start balance by
Press and hold for approx. 5 sec until “--------“,
followed by “CAL“ briefly appears on the screen.
Afterwards an internal value will be shown.
(example)
Press
briefly and the size for the adjusting weight
(See chap. 1, S
pecifications) will be displayed on the
screen.
(example)
Now set the adjusting weight in the centre of the weighing
plate.
“--------“ will be shortly displayed, followed by “F“.

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This completes adjustment and the weighing scale will
change automatically to weighing mode.
(example)
Remove adjustment weight, adjustment complete.
An error during adjustment or the use of an incorrect adjusting weight will result in an
error message „E“. Repeat adjustment.
Keep the adjustment close to the balance. Daily control of the weighing exactness is
recommended for quality-relevant applications.

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6 Operation
6.1 Weighing
Start balance by pressing .
The weighing scale will
perform a self-test and change to zero display.
If the material to be weighed is heavier than the weighing
range, the display will show "E" (=Overload).
To turn off weighing scale, press the button . “oFF“ will
appear on the screen before the weighing scale is turned
off automatically.
6.2 Taring
In weighing mode, put tare vessel on weighing pan and
press . The display will show “0“, indicating that the
weight of the vessel has been saved internally.
(example)
Place material to be weighed; read measured result.
(example)
If one after finishing the weighing process presses again the button, „0“ appears
anew in the display.
The taring process can be repeated any number of times, e.g. when adding several
components for a mixture (adding).
The limit is reached when the whole weighing range is exhausted.
After removing the taring container the total weight is displayed as negative display.

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6.3 Weighing Units
Weighing results can be displayed in different units.
Change by pressing the button.
Press and hold the button when the weighing plate is loaded and the unit will
change after a few seconds.
Display
screen
Conversion factor
1 g =
Grams *
g
1.
Ounce
oz
0.035273962
Troy ounce
ozt
0.032150747
Pennyweight
dwt
0.643014931
7 Menu
7.1 Navigation in the menu
Access to menu When the balance is switched off, press the OFF-button
and keep it pressed.
Press also the ON/TARE-button and keep it pressed until
the current software status (e.g. <P 1.03>) is displayed.
Release OFF-button and press again briefly,
the first
menu item <AF> is displayed.
Release both buttons
How to select menu
items With help of ON/TARE-button
, the individual menu items
can be selected one after the other..
Change settings Acknowledge selected menu item using OFF–button, the
current setting is displayed.
Select desired setting with ON/TARE-button and confirm
with OFF-button.
After a short period the balance returns automatically to
weighing mode.

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7.2 Description of individual menu items
7.2.1 AUTO OFF function
For battery operation the balance has an automatic switch-off function which can be
activated or deactivated in the menu. Proceed as follows:
Call up menu item <AF>, s. chap. 7.1
Confirm by pressing the OFF-button
Now you can use the ON/TARE-button to select between the following settings:
Display
Adjustment
„AF Y“ In order to save the battery, the balance switches
automatically off after 3 minutes without weighing.
„AF n“ Continuous operation
Confirm your selection with the OFF-button. After a short period the balance
returns automatically to weighing mode.
7.3 Zero-Tracking
The Auto-Zero function is used to tare small variations in weight automatically.
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“. (Example: Slowly draining fluids from a container on the balance).
When apportioning involves small variations of weight, it is advisable to switch off this
function.
If Zero-Tracking however is switched off, the weighing display becomes more busy.
Activate/deactivate Zero-Tracking:
Call up menu item <tr>, s. chap. 7.1
Confirm by pressing the OFF-button.
Now you can use the ON/TARE-button to select between the following settings:
Display
Adjustment
„tr Y“ Auto-Zero activated
„tr n“ Auto Zero switched off
Confirm your selection with the OFF-button. After a short period the balance
returns automatically to weighing mode.

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7.4 Reset function
Reset menu to default settings.
Call up menu item < rSt>, s. chap. 7.1
Confirm by pressing the OFF-button.
Now you can use the ON/TARE-button to select between the following settings:
Display
Adjustment
„rst Y“ Reset menu to default settings.
„rst n“ No reset of menu to default settings.
Confirm your selection with the OFF-button. After a short period the balance
returns automatically to weighing mode.
8 Servicing, maintenance, disposal
8.1 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.
8.2 Servicing, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
Before opening, disconnect from power supply.
8.3 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.

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9 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.
Help:
Fault Possible cause
The displayed weight does not glow. •The balance is not switched on.
•Batteries are inserted incorrectly or
empty
•No batteries inserted.
•The mains supply connection has
been interrupted (mains cable not
plugged in/faulty).
•Power supply interrupted.
The displayed weight is permanently
changing •Draught/air movement
•Table/floor vibrations
•Weighing pan has contact with other
objects.
•
Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
The weighing result is obviously
incorrect •The display of the balance is not at
zero
•Adjustment is no longer correct.
•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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10 Declaration of Conformity
To view the current EC/EU Declaration of Conformity go to:
www.kern-sohn.com/ce