KERN KERN 440 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
Precision balances
KERN 440
Version 4.1
09/2009
GB
440-BA-e-0941

GB KERN 440
Version 4.1 09/2009
Operating instruction
Precision balances
Table of Contents
1Technical data................................................................................................ 4
2Declaration of conformity ............................................................................. 8
3Basic Information (General).......................................................................... 9
3.1 Proper use................................................................................................................................. 9
3.2 Improper Use ............................................................................................................................ 9
3.3 Warranty.................................................................................................................................... 9
3.4 Monitoring of Test Resources............................................................................................... 10
4Basic Safety Precautions............................................................................ 10
4.1 Pay attention to the instructions in the Operation Manual................................................ 10
4.2 Personnel training.................................................................................................................. 10
5Transport and storage................................................................................. 10
5.1 Testing upon acceptance...................................................................................................... 10
5.2 Packaging................................................................................................................................ 10
6Unpacking, Setup and Commissioning ..................................................... 11
6.1 Installation Site, Location of Use.......................................................................................... 11
6.2 Unpacking............................................................................................................................... 11
6.2.1 Setup ........................................................................................................................................ 11
6.2.2 Scope of delivery...................................................................................................................... 12
6.3 Mains connection................................................................................................................... 12
6.4 Operation using a (rechargeable) battery (optional) .......................................................... 12
6.5 Connection of peripheral devices......................................................................................... 13
6.6 Initial Commissioning............................................................................................................ 13
6.7 Adjustment.............................................................................................................................. 13
6.8 Adjustment.............................................................................................................................. 13
6.9 Underfloor weighing .............................................................................................................. 14
7Operation...................................................................................................... 15
7.1 Overview of display................................................................................................................ 15
7.2 Weighing ................................................................................................................................. 15
7.3 Taring....................................................................................................................................... 16
7.4 PRE-Tare function.................................................................................................................. 16
7.5 Plus/minus weighings............................................................................................................16
7.6 Parts counting ........................................................................................................................ 17
7.7 Net-total weighings................................................................................................................ 18
7.8 Percent weighings.................................................................................................................. 18
7.9 Weighing units (Unit) ............................................................................................................. 19
7.10 Display background illumination.......................................................................................... 20
7.11 Animal weighing function...................................................................................................... 21
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8Settings......................................................................................................... 22
8.1 Call-up menu structure..........................................................................................................22
8.2 Leave menu structure............................................................................................................23
8.3 Dosing and Zero-tracking...................................................................................................... 23
8.4 Selection of the adjustment weight...................................................................................... 24
8.5 Interface RS232C.................................................................................................................... 25
8.5.1 Data transfer mode................................................................................................................... 25
8.5.2 Baud rate.................................................................................................................................. 25
8.6 Selection printed edition .......................................................................................................26
8.7 Reset to factory setting ......................................................................................................... 27
9Data output RS 232 C .................................................................................. 28
9.1 Technical data......................................................................................................................... 28
9.2 Pin allocation of the balance output socket (front view), .................................................. 28
9.3 Explanation of the data transfer ........................................................................................... 28
9.3.1 Pr PC........................................................................................................................................ 28
9.3.2 AU Pr....................................................................................................................................... 28
9.3.3 AU PC...................................................................................................................................... 29
9.3.4 rE Cr ........................................................................................................................................ 29
9.4 Output on bar code printer.................................................................................................... 30
10 Service, maintenance, disposal.................................................................. 31
10.1 Cleaning .................................................................................................................................. 31
10.2 Service, maintenance............................................................................................................. 31
10.3 Disposal................................................................................................................................... 31
11 Instant help................................................................................................... 32
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1 Technical data
KERN 440-21N 440-21A 440-33N
Readability (d) 0.001 g 0.001 g 0.01 g
Weighing range (max) 40 g 60 g 200 g
Taring range (subtractive) 40 g 60 g 200 g
Reproducibility 0.001 g 0.001 g 0.01 g
Linearity ± 0.003 g ± 0.003 g ± 0.02 g
Minimum unit weight at
piece counting 0.002 g 0.002 g 0.02 g
Warm-up time 2 hours 2 hours 30 minutes
Reference quantities at
piece counting 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended adjustment weight,
not added (class) 40g (F1) 50g (F2) 200g (M1)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 165 x 230 x 80
Weighing plate mm Ø 81 Ø 81 Ø 105
Weight kg (net) 1.0 1.0 1.0
Underfloor weighing - - Standard
Flush-mounted hook - - Option
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KERN 440-35N 440-35A 440-43N 440-45N
Readability (d) 0.01 g 0.01 g 0.1 g 0.1 g
Weighing range (max) 400 g 600 g 400 g 1,000 g
Taring range (subtractive) 400 g 600 g 400 g 1,000 g
Reproducibility 0.01 g 0.01 g 0.1 g 0.1 g
Linearity ± 0.03 g ± 0.03 g ± 0.2 g ± 0.2 g
Minimum unit weight at
piece counting 0.02 g 0.02 g 0.2 g 0.2 g
Warm-up time 2 hours 2 hours 10 minutes 30 minutes
Reference quantities at
piece counting 5, 10, 25, 50
Weighing Units Details „Weighing units“ chapter 7.9
Recommended adjustment
weight, not added (class) 400g (F2) 500g (F2) 400 g (M2) 1,000 g (M1)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 165 x 230 x 80
Weighing plate mm Ø 105 Ø 105 130 x 130 130 x 130
Weight kg (net) 1.0 1.0 1.0 1.0
Underfloor weighing Standard
Flush-mounted hook Option
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KERN 440-47N 440-49N 440-49A
Readability (d) 0.1 g 0.1 g 0.1 g
Weighing range (max) 2,000 g 4,000 g 6,000 g
Taring range (subtractive) 2,000 g 4,000 g 6,000 g
Reproducibility 0.1 g 0.1 g 0.1 g
Linearity ± 0.2 g ± 0.3 g ± 0.3 g
Minimum unit weight at piece
count 0.2 g 0.2 g 0.2 g
Warm-up time 30 minutes 2 hours 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) 2,000 g (M1) 4,000 g (F2) 5,000 g (F2)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 165 x 230 x 80
Weighing plate mm 130 x 130 150 x 170 150 x 170
Weight kg (net) 1.0 1.0 1.0
Underfloor weighing Standard
Flush-mounted hook Option
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KERN 440-51N 440-53N 440-55N
Readability (d) 1 g 1 g 0.2 g
Weighing range (max) 4,000 g 6,000 g 6,000 g
Taring range (subtractive) 4,000 g 6,000 g 6,000 g
Reproducibility 1 g 1 g 0.2 g
Linearity ± 2 g ± 2 g ± 0.6 g
Minimum unit weight at piece
count 2 g 2 g 0.4 g
Warm-up time 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) 4,000 g (M2) 5,000 g (M2) 5,000 g (F2)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 165 x 230 x 80
Weighing plate mm 150 x 170 150 x 170 150 x 170
Weight kg (net) 1.0 1.0 1.0
Underfloor weighing Standard
Flush-mounted hook Option
440-BA-e-0941 7

2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postbox 4052
email: [email protected]
Phone: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Declaration of conformity
Declaration of conformity for apparatus with CE mark
Konformitätserklärung für Geräte mit CE-Zeichen
Déclaration de conformité pour appareils portant la marque CE
Declaración de conformidad para aparatos con marca CE
Dichiarazione di conformità per apparecchi contrassegnati con la marcatura CE
English We hereby declare that the product to which this declaration refers conforms to the
following standards.
Deutsch Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den
nachstehenden Normen übereinstimmt.
Français Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Español Manifestamos en la presente que el producto al que se refiere esta declaración está de
acuerdo con las normas siguientes
Italiano Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è
conforme alle norme di seguito citate.
Electronic Balance: KERN 440
Mark applied EU Directive Standards
89/336EEC EMC EN 55022 : 1998+A1 : 2000
EN 61000-3-2 : 2000
EN 61000-3-3 : 1995+A1 : 2001
EN 55024 : 1998+A1 : 2001
Date: 15.12.2005 Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
440-BA-e-0941
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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
440-BA-e-0941 9

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,
power unit 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.
At the models 440-21N and 440-21A the transport securing must be removed before
the weighing plate is mounted.
440-BA-e-0941 11

6.2.2 Scope of delivery
Serial accessories:
•Balance (incl. protective cover)
•Weighing plate
•Mains power supply
•Operating Manual
•Windshield (440-21N, 440-21A)
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 two 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 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.
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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.
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 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.
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 there 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 there appears „CAL F“, then the automatic
return 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.
440-BA-e-0941 13

6.9 Underfloor weighing
Objects unsuitable for placing on the weighing scale due to size or shape may be
weighed with the help of the flush-mounted platform.
Proceed as follows:
•Switch off balance.
•Turn round the balance.
•Open the closing lid (1) on the bottom of your balance.
•Screw-in the hook for underfloor weighing (2) carefully and completely till to
the stop (do not screw-in farther, as this will damage the balance).
•Place your balance over an opening.
•Suspend the goods to be weighed from the hook and carry out the weighing.
1
2
Fig. 1: Setup of balance for underfloor weighing
CAUTION
•For underfloor weighing use the original hook provided by KERN.
•Always ensure that all suspended objects are stable enough to hold the desired
goods to be weighed safely (danger of breaking).
•Never suspend loads that exceed the stated maximum load (max) (danger of
breaking)
Always ensure that there are no persons, animals or objects that might be damaged
underneath the load.
!
NOTICE
After completing the underfloor weighing the opening on the bottom of the balance
must always be closed (dust protection).
!
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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.
440-BA-e-0941 15

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 one after finishing the weighing process presses again the key, „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.
For this switch on the 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. After that, 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 quantity 5.
By pressing the key several times other reference quantities 10, 25 and 50 can
be called up.
Place as many parts 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 parts 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 the weighing mode.
The tare vessels can also be used for piece counting. Before starting percent
weighing use the key to tare out the container.
440-BA-e-0941 17

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:
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.
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.
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7.9 Weighing units (Unit)
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 shortly, the selected unit appears in the display.
Use the key to select between the different units (see table).
By pressing the key the selected weighing unit is taken over.
Display
display Conversion factor 1 g =
Gram g 1.
Pound lb 0.0022046226
Ounce oz 0.035273962
Troy ounce ozt 0.032150747
Tael Hongkong tlh 0.02671725
Tael Taiwan tlt 0.0266666
Grain gn 15.43235835
Pennyweight dwt 0.643014931
Momme (mom) 0.2667
Tola tol 0.0857333381
Carat ct 5
Freely selectable factor *) FFA xx.xx
*)
In order to enter an own conversion factor, press the key as explained above
until „FFA“ is displayed. Press the key to reach to the selection. The last digit
begins to flash. Using the key, the displayed value is increased by 1, with the
key it is reduced by 1. Use the key to jump one digit to the left. When all
the changes are ready, use the key to save this value and by pressing the
key the „Freely selectable factor“ is taken over as current weighing unit.
440-BA-e-0941 19

The different weighing models have integrated different foreign weighing units.
Details can be seen in this table:
Model
Units
440-21N 440-21A 440-33N 440-35N 440-35A 440-43N 440-45N 440-47N 440-49N 440-49A 440-51N 440-53N 440-55N
Gram x x x x x x x x x x x x x
Pound x x x x x x x x x x x
Ounce x x x x x x x x x x x x x
Troy ounce x x x x x x x x x x x x x
Tael Hongkong x x x x x x x x x x x x x
Tael Taiwan x x x x x x x x x x x x x
Grain x x x x x x
Pennyweight x x x x x x x x x x x x x
Momme x x x x x x x x x x x x x
Tola x x x x x x x x x x x x x
Carat x x x x x
Freely selectable factor x x x x x x x x x x x x x
7.10 Display background illumination
In the menu the functions of the background illumination can be switched on or off.
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 seven times, in the display appears „bl“.
Confirm by pressing the key
Use the key to choose between the three following settings:
Display Adjustment Function
„bl“ on Background illumination on Contrastful display which
can also be red in the
darkness.
„bl“ off Background illumination off Battery saving
„bl“ Ch The background illumination
will be switched off
automatically 10 sec after
having reached a stable
weighing value.
Battery saving
Use the key to confirm your selected setting.
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