KERN DE3K1N User manual

DE-BA-defsi-0640 3
7
GB KERN DE
Version 4.0 12/2006
Operating Manual
Electronic Platform Balance
Table of Contents
1Technical data ................................................................................................. 39
2Declaration of conformity............................................................................... 46
3Basic Information (General) ........................................................................... 47
3.1 Proper use ................................................................................................ 47
3.2 Improper Use............................................................................................ 47
3.3 Warranty.................................................................................................... 47
3.4 Monitoring of Test Resources................................................................. 48
4Basic Safety Precautions................................................................................ 48
4.1 Pay attention to the instructions in the Operation Manual................... 48
4.2 Personnel training.................................................................................... 48
5Transport and storage .................................................................................... 48
5.1 Testing upon acceptance ........................................................................ 48
5.2 Packaging ................................................................................................. 48
6Unpacking, Setup and Commissioning......................................................... 49
6.1 Installation Site, Location of Use............................................................ 49
6.2 Unpacking................................................................................................. 49
6.2.1 Setup...................................................................................................... 49
6.2.2 Scope of delivery.................................................................................... 49
6.2.3 Grundaufbau........................................................................................... 50
6.2.3.1 Assembly instructions for the use of the tripod (option)................... 50
6.3 Mains connection..................................................................................... 51
6.4 Operation using a (rechargeable) battery (optional)............................. 51
6.5 Connection of peripheral devices........................................................... 51
6.6 Initial Commissioning.............................................................................. 52
6.7 Adjustment ............................................................................................... 52
6.8 Adjustment ............................................................................................... 52
7Operation ......................................................................................................... 53
7.1 Overview of display.................................................................................. 53
7.2 Weighing................................................................................................... 53

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7.3 Taring........................................................................................................ 54
7.4 PRE-Tare function.................................................................................... 54
7.5 Plus/minus weighings.............................................................................. 54
7.6 Parts counting.......................................................................................... 55
7.7 Net-total weighings.................................................................................. 55
7.8 Percent weighings.................................................................................... 56
7.9 Weighing units (Unit)............................................................................... 57
7.10 Display background illumination............................................................ 59
7.11 Animal weighing function........................................................................ 60
8Settings............................................................................................................ 61
8.1 Call-up menu structure............................................................................ 61
8.2 Leave menu structure.............................................................................. 62
8.3 Dosing and Zero-tracking........................................................................ 62
8.4 Selection of the adjustment weight........................................................ 63
8.5 Interface RS232C...................................................................................... 64
8.5.1 Data transfer mode................................................................................. 64
8.5.2 Baud rate................................................................................................ 64
8.6 Selection printed edition ......................................................................... 65
8.7 Reset to factory setting ........................................................................... 66
9Data output RS 232 C...................................................................................... 67
9.1 Technical data .......................................................................................... 67
9.2 Pin allocation of the balance output socket (front view)...................... 67
9.3 Explanation of the data transfer.............................................................. 67
9.3.1 Pr PC...................................................................................................... 67
9.3.2 AU Pr..................................................................................................... 67
9.3.3 AU PC.................................................................................................... 68
9.3.4 rE Cr...................................................................................................... 68
9.4 Output on bar code printer...................................................................... 69
10 Service, maintenance, disposal.................................................................. 70
10.1 Cleaning.................................................................................................... 70
10.2 Service, maintenance............................................................................... 70
10.3 Disposal .................................................................................................... 70
11 Instant help................................................................................................... 71

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1 Technical data
KERN DE3K1N DE6K0.5N DE6K2N DE12K1N
Readability (d) 1 g 0.5 g 2 g 1 g
Weighing range (max) (d) 3 kg 6 kg 6 kg 12 kg
Taring range (subtractive) 3 kg 6 kg 6 kg 12 kg
Minimum piece weight 2 g 1 g 4 g 2 g
Reproducibility 1 g 0.5 g 2 g 1 g
Linearity ± 3 g ± 1.5 g ± 6 g ± 3 g
Warm-up time 10 minutes 30 minutes 10 minutes 30 minutes
Reference unit weights at
piece count 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended
adjustment weight, not
added (class)
Details for „Selection of
the Adjustment weight“
in chapter 8.4
3 kg
( M2 ) 6 kg ( M1 ) 6 kg ( M2 ) 12 kg ( M1 )
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Terminal (B x D x H) mm 200 x 100 x 55
Platform (B x D x H ) mm 315 x 305 x 75
Weight kg (net) 4 4 4 4

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KERN DE15K0.5N DE15K5N DE24K2N DE30K1N
Readability (d) 0.5 g 5 g 2 g 1 g
Weighing range (max) 15 kg 15 kg 24 kg 30.5 kg
Taring range (subtractive) 15 kg 15 kg 24 kg 30.5 kg
Minimum piece weight 1 g 10 g 4 g 2 g
Reproducibility 0.5 g 5 g 2 g 1 g
Linearity ± 1.5 g ± 15 g ± 6 g ± 3 g
Warm-up time 2 hours 10 minutes 30 minutes 2 hours
Reference unit weights at
piece count 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended
adjustment weight, not
added (class)
Details for „Selection of
the Adjustment weight“
in chapter 8.4
15 kg
(F2) 15 kg ( M2 ) 20 kg ( M1 ) 30 kg (F2)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Terminal (B x D x H) mm 200 x 100 x 55
Platform (B x D x H ) mm 315 x 305 x 82 315 x 305 x 75 315 x 305 x 75 315 x 305 x 82
Weight kg (net) 5 4 4 5

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KERN DE36K10N DE36K10NL DE60K2N DE60K5N
Readability (d) 10 g 10 g 2 g 5 g
Weighing range (max) 36 kg 36 kg 60 kg 60 kg
Taring range (subtractive) 36 kg 36 kg 60 kg 60 kg
Minimum piece weight 20 g 20 g 4 g 10 g
Reproducibility 10 g 10 g 2 g 5 g
Linearity ± 30 g ± 30 g ± 6 g ± 15 g
Warm-up time 10 minutes 10 minutes 2 hours 30 minutes
Reference unit weights at
piece count 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended
adjustment weight, not
added (class)
Details for „Selection of
the Adjustment weight“
in chapter 8.4
30 kg
( M2 ) 30 kg ( M2 ) 60 kg (F2) 60 kg ( M1 )
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Terminal (B x D x H) mm 200 x 100 x 55
Platform (B x D x H )mm 315 x 305 x 75 522 x 403 x
100 315 x 305 x 82 315 x 305 x 75
Weight kg (net) 5 16 5 5

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KERN DE60K5NL DE60K20N DE60K20NL
Readability (d) 5 g 20 g 20 g
Weighing range (max) 60 kg 60 kg 60 kg
Taring range (subtractive) 60 kg 60 kg 60 kg
Minimum piece weight 10 g 40 g 40 g
Reproducibility 5 g 20 g 20 g
Linearity ± 15 g ± 60 g ± 60 g
Warm-up time 30 minutes 10 minutes 10 minutes
Reference unit weights at
piece count 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended adjustment
weight, not added (class)
Details for „Selection of
the Adjustment weight“
in chapter 8.4
60 kg
( M1 ) 60 kg ( M2 ) 60 kg ( M2 )
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Terminal (B x D x H) mm 200 x 100 x 55
Platform (B x D x H ) mm 522 x 403 x 100 315 x 305 x 75 522 x 403 x 85
Weight kg (net) 16 5 16

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KERN DE120K10N DE120K10NL DE150K5N
Readability (d) 10 g 10 g 5 g
Weighing range (max) 120 kg 120 kg 150 kg
Taring range (subtractive) 120 kg 120 kg 150 kg
Minimum piece weight 20 g 20 g 10 g
Reproducibility 10 g 10 g 5 g
Linearity ± 30 g ± 30 g ± 15 g
Warm-up time 30 minutes 30 minutes 2 hours
Reference unit weights at
piece count 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended
adjustment weight, not
added (class)
Details for „Selection of
the Adjustment weight“
in chapter 8.4
120 kg
( M1 ) 120 kg ( M1 ) 150 kg (F2)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Terminal (B x D x H) mm 200 x 100 x 55
Platform (B x D x H ) mm 315 x 305 x 75 522 x 403 x 100 315 x 305 x 82
Weight kg (net) 5 16 5

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KERN DE150K50N DE150K50NL DE150K50NXL
Readability (d) 50 g 50 g 50 g
Weighing range (max) 150 kg 150 kg 150 kg
Taring range (subtractive) 150 kg 150 kg 150 kg
Minimum piece weight 100 g 100 g 100 g
Reproducibility 50 g 50 g 50 g
Linearity ± 150 g ± 150 g ± 150 g
Warm-up time 10 minutes 10 minutes 10 minutes
Reference unit weights at
piece count 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended
adjustment weight, not
added (class)
Details for „Selection of
the Adjustment weight“
in chapter 8.4
150 kg
( M2 ) 150 kg ( M2 ) 150 kg ( M2 )
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Terminal (B x D x H) mm 200 x 100 x 55
Platform (B x D x H ) mm 315 x 305 x 75 522 x 403 x 100 650 x 500 x 105
Weight kg (net) 5 16 28

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KERN DE240K20NL DE300K100N DE300K100NL
Readability (d) 20 g 100 g 100 g
Weighing range (max) 240 kg 300 kg 300 kg
Taring range (subtractive) 240 kg 300 kg 300 kg
Minimum piece weight 40 g 200 g 200 g
Reproducibility 20 g 100 g 100 g
Linearity ± 60 g ± 300 g ± 300 g
Warm-up time 30 minutes 10 minutes 10 minutes
Reference unit weights at
piece count 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended
adjustment weight, not
added (class)
Details for „Selection of
the Adjustment weight“
in chapter 8.4
200 kg
( M1 ) 300 kg ( M2 ) 300 kg ( M2 )
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Terminal (B x D x H) mm 200 x 100 x 55
Platform (B x D x H ) mm 522 x 403 x 100 522 x 403 x 85 650 x 500 x 105
Weight kg (net) 16 16 28

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2 Declaration of conformity
Declaration of conformity
The electronic balances
Type
: KERN DE3K1N
KERN DE6K0.5N
KERN DE6K2N
KERN DE12K1N
KERN DE15K0.5N
KERN DE15K5N
KERN DE24K2N
KERN DE30K1N
KERN DE36K10N
KERN DE36K10NL
KERN DE60K2N
KERN DE60K5N
KERN DE60K5NL
KERN DE60K20N
KERN DE60K20NL
KERN DE120K10N
KERN DE120K10NL
KERN DE150K5N
KERN DE150K50N
KERN DE150K50NL
KERN DE150K50NXL
KERN DE240K20NL
KERN DE300K100N
KERN DE300K100NL
fulfill the requirements of the following CE guideline:
CE-EMC guideline (directive about
electromagnetic compatibility) in the version 89/336/EWG
Applied harmonized standards, in particular:
EN 55022 : 1998
EN 61000-3-2: 1995/A1: 1998/A2 : 1998/A14 :2000
EN 61000-3-3 : 1995
EN 55024 :1998
Any modifications of the appliances described above that are carried out without prior
permission by KERN will render this declaration invalid.
Date: 19.12.2006 Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72322 Balingen, Tel. [phone],Fax [phone]

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3 Basic Information (General)
3.1 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.
3.2 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.
3.3 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 and damage caused by media, liquids
•Natural wear and tear
•The appliance is improperly set up or incorrectly electrically connected
•The measuring system is overloaded

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3.4 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.
4 Basic Safety Precautions
4.1 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.
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 Transport and storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
5.2 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,
mains adapter etc., to prevent slipping and damage.

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6 Unpacking, Setup and Commissioning
6.1 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.
6.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
6.2.1 Setup
The balance must be installed in a way that the weighing plate is exactly in horizontal
position.
6.2.2 Scope of delivery
Serial accessories:
•Terminal
•Platform
•Mains power supply
•Protective cover
•Operating Manual

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6.2.3 Basic structure
•Place the balance on a horizontal and solid base
(refer also to „6.2.1 Installation“)
•Pull off the protection foil from the weighing plate if existing.
6.2.3.1 Assembly instructions for the use of the tripod (option)

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6.3 Mains connection
Power is supplied via the external mains adapter. 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.
6.4 Operation using a (rechargeable) battery (optional)
Lift-off the battery cover on the lower side of the balance. Connect 9 V compound
battery.
Reinsert the battery cover.
For battery operation the balance has an automatic switch-off function which can be
activated or deactivated in the menu (chapter 8.1). Proceed as follows:
Switch-on the balance using the key and wait for the „0“ display.
Press the key and keep it pressed until „UNIT“ appears on the display.
Press the key four times, in the display appears „AF“.
Confirm by pressing the key
Use the key to choose between the following settings:
1. „AF on“: To save the battery, the balance switches off automatically 3
minutes after
having finished the weighing procedure.
2. „AF off“: Switch-off function deactivated.
Use the key to confirm your selected setting.
If the batteries are exhausted, „LO“ is displayed; press 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.
If there exists an optional rechargeable battery, it has to be connected in the battery
compartment via a separate plug-in socket. Now the mains adapter delivered with the
rechargeable battery must be applied.
6.5 Connection of peripheral devices
Before connecting or disconnecting of additional devices (printer, PC) to the data
interface, always disconnect the balance from the power supply.
With your balance, only use accessories and peripheral devices by KERN, as they
are ideally tuned to your balance.

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6.6 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).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
6.7 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 during the initial start-up, after change in
location and variation of surrounding temperature. To receive accurate measuring
values it is also recommended to adjust the balance periodically in weighing
operation.
6.8 Adjustment
The adjustment should be made with the recommended adjustment weight (see
chap. 1 "Technical data"). Adjustment is also possible with the weights of other
nominal values (see table 1), but not the optimum for measuring technique.
Procedure when adjusting:
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.
Switch on the balance using the key
Press key and keep it pressed, after the acoustic signal appears in the display for
short time „CAL“. After that the exact size appears flashing in the display
(chapter.8.4) of the adjustment weight.
Now set the adjusting weight in the centre of the weighing plate.
Now press the key. Short time later appears „CAL F“, then return automatically to
the normal weighing mode. In the display there appears the value of the adjustment
weight.
An error during adjustment or the use of an incorrect adjusting weight will result in an
error message „CAL 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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7 Operation
7.1 Overview of display
7.2 Weighing
Switch on the balance using the key
The balance shows for approx. 3 seconds „88888“ in the display and then goes to
„0“. Now it is ready for operation.
Important: Should the display flash or not be on „0“, press the key.
Only now (!) place goods onto weighing plate. Take care that the weighed material
does not touch the balance housing or the base mat.
Now the weight is displayed, after the standstill control appears the weighing unit
(e.g. g or kg) right-hand in the display.
If the goods are heavier than the weighing range, the display will show "Error"
(=Overload), and a whistle is sounded.

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7.3 Taring
Switch-on the balance using the key and wait for the „0“ display.
Put the tare vessel on the weighing plate and press the key. The balance
display goes to „0“. The weight of the container is now internally saved.
If after finishing the weighing process the key, is pressed again, „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.
7.4 PRE-Tare function
Using this function the weight of a tare vessel can be stored.
This value also remains saved if the balance meanwhile has been switched off and
switched on again.
Switch-on balance using the key and wait for the „0“ display.
Put tare vessel on the weighing plate and press the key 6 times until „PtArE“
flashes on the display. By actuating the key, the current weight on the weighing
plate is saved as PRE-Tare weight.
To switch off this function, unload the weighing plate and press the key 6 times,
until „PtArE“ flashes on the display. Then press the key. The stored PRE-Tare
weight is deleted.
7.5 Plus/minus weighings
For example unit weight control, fabrication control etc.
Switch-on the balance using the key and wait for the „0“ display.
Put the nominal weight on the weighing plate and tare to „0“ using the key.
Remove the nominal weight.
Put the test objects subsequently on the weighing plate, the respective deviation from
the nominal weight is displayed with the respective sign to „+“ and „-“.
According to the same procedure also packages with the same weight can be
produced, referring to a nominal weight.
Back to weighing mode by pressing the key.

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7.6 Parts counting
Switch-on the balance using the key and wait for the „0“ display.
Press key shortly.
Appears the reference unit number 5.
By pressing the key several times, more reference quantities 10, 25 and 50 can
be called up.
Place as many pieces to count on the weighing plate as the set reference quantity
requires.
Confirm with key.
The balance is now in parts counting mode counting all units on the weighing plate
By pressing the key the balance returns to the weighing mode and displays the
weight of the counted units.
Important: The larger the reference quantity, the more accurate the parts
counting.
Smallest counted weight see table „Technical data“, if this weight is less, in the
display appears „Er 1“. Use key to return to weighing mode.
The tare vessels can also be used for piece counting. Prior to the piece count tare
the tare vessel with key.
7.7 Net-total weighings
It is useful if a mixture of several components is weighed into a tare vessel and finally
the sum weight of all weighed components is necessary for control purposes (net-
total, i.e. the weight of the tare vessel).
Example:
Switch-on the balance using the key and wait for the „0“ display.
Put tare vessel onto weighing plate, tare with key to „0“.
Weigh component nand tare with key (Memory) to „0“. The memory activation is
indicated by a triangle on the left border of the display.
Weigh component o, when pressing the key appears the net-total, that means,
the sum weight of the components nand o. Tare to „0“ using the key.
Weigh component p, when pressing the key, appears the net-total, i.e. the sum
weight of components nand oand p.
If necessary, also fill the formula up to the desired final value.
Back to weighing mode by pressing the key.

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6
7.8 Percent weighings
Display symbol: %
Percent weighing allows to display weight in percent, in relation to a reference
weight.
Switch-on the balance using the key and wait for the „0“ display.
Press the key several times shortly. The reference quantities of the counting
function are passed through, after that „100%“ is displayed.
Place the reference item on the weighing pan.
Press key, the weight of the item is taken over as reference (100%).
Now you can place the test objects onto the weighing plate; the percentage is
displayed
Back to weighing mode by pressing the key.