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Precision Balances - 精密天平
- KERN & Sohn GmbH
- Ziegelei 1
- 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
1 Technical data................................................................................................ 4
2 Declaration of conformity ............................................................................. 8
3 Basic Information (General).......................................................................... 9
3.1 Proper use................................................................................................................................. 9
3.2 Improper Use ............................................................................................................................ 9
3.3 Warranty.................................................................................................................................... 9
3.4 Monitoring of Test Resources............................................................................................... 10
4 Basic Safety Precautions............................................................................ 10
4.1 Pay attention to the instructions in the Operation Manual................................................ 10
4.2 Personnel training.................................................................................................................. 10
5 Transport and storage................................................................................. 10
5.1 Testing upon acceptance...................................................................................................... 10
5.2 Packaging................................................................................................................................ 10
6 Unpacking, 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
7 Operation...................................................................................................... 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
440-BA-e-0941 2
8 Settings......................................................................................................... 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
9 Data 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
440-BA-e-0941 3
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 ? 81 ? 81 ? 105
Weight kg (net) 1.0 1.0 1.0
Underfloor weighing - - Standard
Flush-mounted hook - - Option
440-BA-e-0941 4
KERN 440-35N 440-3 440-43N 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 ? 105 ? 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
440-BA-e-0941 5
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
440-BA-e-0941 6
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
: info@kern-sohn.de
Phone: 0049-[0]7433- 9933-0
0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Declaration of conformity
Declaration of conformity for apparatus with CE mark
Konformit?tserkl?rung für Ger?te 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 erkl?ren hiermit, dass das Produkt, auf das sich diese Erkl?rung bezieht, mit den
nachstehenden Normen übereinstimmt.
Fran?ais Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Espa?ol 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, . +49-[0]7433/9933-0, +49-[0]7433/9933-149
440-BA-e-0941 8
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 immediay, 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.
440-BA-e-0941 10
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 accuray 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 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.
440-BA-e-0941 12
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 compley 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).
!
440-BA-e-0941 14
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.
440-BA-e-0941 16
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 ? and tare with key (Memory) to ?0“. The memory activation is
indicated by a triangle on the left border of the display.
Weigh component ?, when pressing the key appears the net total, that means,
the sum weight of the components ? and ?. Tare to ?0“ using the key.
Weigh component ? , when pressing the key appears the net-total,
i.e. the sum weight of components ? and ? and ?.
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.
440-BA-e-0941 18
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
440-3
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.
440-BA-e-0941 20
7.11 Animal weighing function
The balance has an integrated animal weighing function (mean value calculation).
With this function it is possible to weigh domestic or small animals exactly, although
they do not stand quiet on the weighing plate.
Note: If they move too much, an exact weighing will not be possible.
In the menu the animal weighing function can be switched on or off. To achieve this,
follow the sequence of operations below:
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 eight times, in the display appears ?ANL“.
Confirm by pressing the key.
Use the key to choose one of the following settings:
Display Function
?ANL“ off Animal weighing function is switched off
?ANL“ 3 Weighing value calculation above 3 sec. till to the value
display
?ANL“ 5 Weighing value calculation above 5 sec. till to the value
display
?ANL“ 10 Weighing value calculation above 10 sec. till to the value
display
?ANL“ 15 Weighing value calculation above 15 sec. till to the value
display
Use the key to confirm the selected setting.
Operation:
Switch-on the balance using the ON key and wait for the ?0“ display.
Put the weighing good (animal) on the weighing plate and press the die key. In
the display the preselected time is displayed in seconds and then is counted towards
zero. During this time the balance takes up several measuring values. When
reaching ?0“ sounds an acoustic signal and the calculated weighing value is
displayed.
By pressing the key several times, the balance returns to the normal weighing
mode.
Repeated pressing of the key activates this function anew.
440-BA-e-0941 21
8 Settings
8.1 Call-up menu structure
Switch-on the balance using the key and wait for the ?0“ display.
To enter into the menu structure keep the key pressed approx. 3 sec. until
?UNIT“ appears.
By pressing the key the different menu items are called up. Use the key to
select a menu item. Within this menu item use the key to make your choice. By
pressing repeatedly the key the setting is saved.
Press the PRINT key 3
Unit
seconds ->
Pr
LAPr
baud
AF
tr
CAL
bl
ANL
Chapter 8.5.1
Data transfer mode
rE CR PrPC AU PC AU Pr BA Pr
rst
Hdr GrS Net tAr N7E PCS AUJ rqt FFD
19200
Chapter 8.6
Selection printed edition
Chapter 8.5.2
Baud rate
9600 4800 2400 1200
on off
on off
100 200 300 400
on off CH
off 3 5 10 15
no yes
Chapter 6.4
Battery operation
Chapter 8.3
Zero-Tracking
Chapter 8.4
Selection of adjustment
weight
Chapter 7.10
Background illumination
Chapter 7.11
Animal weighing function
Chapter 8.7
Reset to
Default setting
440-BA-e-0941 22
8.2 Leave menu structure
Everywhere in the menu it is possible to leave the menu structure and thereby save
or reject the changes made.
After pressing the key ?Exit“ is displayed.
A: Use the (YES) key, to confirm. After that ?store“ is displayed. If it shall be
saved, press the key repeatedly.
If the menu shall be left without saving,
press the NO key.
B: The (NOT EXIT) key must be pressed, if the next menu item shall be
reached. After having set all the individual adjustments, it can be saved.
8.3 Dosing and 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“ in the balance. (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 Balance display
1. Keep the key pressed until ?Unit" is displayed. Unit
2. Press the key several times until ?tr“ is displayed.
tr
3. Press the key to activate the function. tr on
4. By pressing once more the key, the function is
deactivated.
tr off
5. The changed setting is taken over by pressing
the key.
6. The balance returns to the weighing mode. 0.0 g
440-BA-e-0941 23
8.4 Selection of the adjustment weight
In the model KERN 440, the adjustment weight can be selected from four pre-set
nominal values (approx.1/4; 1/2; 3/4; max) (refer also to table 1 below, factory setting
with grey background). In order to achieve high-quality weighing results in the sense
of the measuring technology, it is recommended to select the nominal value as high
as possible. The non delivered adjustment weights can be purchased from KERN as
option.
Table 1:
440-21N 440-21A 440-33N 440-35N 440-3 440-43N 440-45N
10g 10g 50g 100g 100g 100g 200g
20g 20g 100g 200g 200g 200g 500g
30g 40g 150g 300g 400g 300g 700g
40g 50g 200g 400g 500g 400g 1,000g
60g 600g
440-47N 440-49N 440-49A 440-51N 440-53N 440-55N
500g 1,000g 1,000g 1,000g 1,000g 1,000g
1,000g 2,000g 2,000g 2,000g 2,000g 2,000g
1,500g 3,000g 5,000g 3,000g 5,000g 5,000g
2,000g 4,000g 6,000g 4,000g 6,000g 6,000g
440-BA-e-0941 24
8.5 Interface RS232C
Data output via interface RS 232 C
General Information
The previous condition for the data transfer between balance and a peripheral device
(e.g. printer, PC ...) is that the appliances are set to the same interface parameters
(e.g. baud rate, transfer mode ...).
8.5.1 Data transfer mode
Setting of data transfer mode Balance display
1. Keep the key pressed until ?Unit" is displayed. Unit
2. Press key, ?Pr“ appears.
Pr
3. To change the setting, press the key. Pr PC
4. The mode can be converted using the key
(Pr PC; AU PC; AU Pr ; re Cr ; BA Pr ;details chapter 9.4).
AU Pr
5. The changed setting is taken over by pressing the key.
6. The balance returns to the weighing mode. 0.0 g
8.5.2 Baud rate
The baud rate necessary for the measuring values transfer can be set.
In the following example the baud rate is set to 9600 baud.
Setting of baud rate Balance display
1. Keep the key pressed until ?Unit" is displayed. Unit
2. Press key
Pr
3. Press key, ?baud“ appears.
Baud
4. Confirm by pressing the key 4800
5. The baud rate can be changed using the key (1200,
2400, 4800, 9600, 19200).
9600
6. The changed setting is taken over by pressing the key.
7. The balance returns to the weighing mode. 0.0 g
440-BA-e-0941 25
8.6 Selection printed edition
Use this function to select which data are sent via the RS232C interface.
To achieve this, follow the sequence of operations below: (is not valid for the data
transfer mode BAPr )
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 twice, in the display appears ?LAPr“.
Confirm by pressing the key
Now it is possible to scroll forward in the available edition parameters using the
key, to scroll backward, use the key.
After actuating the key, the current state is displayed ( on / off ).
Use the or the key to change the state.
After that the current state is saved using the key and the menu is left.
By that way the user can configurate his own data block, which then is sent to a
printer or to a PC.
Display Status Function
?Hdr“ On / Off Edition of the headlines
?GrS“ On / Off Edition of the total weight
?Net“ On / Off Edition of the net weight
?tAr“ On / Off Edition of the tare weight
?N7E“ On / Off Edition of the stored weight
?PCS“ On / Off Edition of quantity
?AUJ“ On / Off Edition of the unit weight
?rqt“ On / Off Edition of the reference quantity
?FFd“ On / Off Edition of a page feeding
440-BA-e-0941 26
8.7 Reset to factory setting
With this function the manual changes of the menu settings are reset to factory
setting.
For this 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 nine times, in the display appears ?rst“.
Acknowledge selection with key. The current status ?no“ is displayed.
Use the key to set the status to ?YES“.
When pressing the key, a reset to factory setting is carried out, and at the same
time the status is reset to ?no“.
After that return to weighing mode.
440-BA-e-0941 27
9 Data output RS 232 C
9.1 Technical data
? 8-bit ASCII Code
? 1 start bit, 8 data bits, 1 stop bit, no parity bit
? Baud rate selectable at 1200, 2400, 4800 and 9600 Baud
? Miniature plug-in necessary (9 pole D-Sub)
? For operation with interface faultless operation is only ensured with the correct
KERN – interface cable (max. 2m)
9.2 Pin allocation of the balance output socket (front view),
5 1
9 6
Pin 2: Transmit data
Pin 3: Receive data
Pin 5: Signal ground
9.3 Explanation of the data transfer
9.3.1 Pr PC
Press the PRINT key, at stable value the format is transferred from LAPR.
a. Format for stable values for weight/quantity/percentage
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
B * B B B B B B B B 0 . 0 B g B B C
R
LF
b. Format in case of fault
1 2 3 4 5 6 7 8 9 10 11 12 13 14
B B B B B B B E r r o r CR LF
9.3.2 AU Pr
As soon as the weighing value is stable, the format is automatically transferred from
LAPR.
c. Format for stable values for weight/quantity/percentage
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
B * B B B B B B B B 0 . 0 B g B B C
R
LF
d. Format in case of fault
1 2 3 4 5 6 7 8 9 10 11 12 13 14
B B B B B B B E r r o r CR LF
440-BA-e-0941 28
9.3.3 AU PC
The weighing values are sent automatically and continuously, no matter if the value is
stable or unstable.
e. Format for stable values for weight/quantity/percentage
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
B * B B B B B B B B 0 . 0 B g B B C
R
LF
f. Format in case of fault
1 2 3 4 5 6 7 8 9 10 11 12 13 14
B B B B B B B E r r o r CR LF
g. Format for unstable values for weight/quantity/percentage
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
B * B B B B B B B B 0 . 0 B CR LF
9.3.4 rE Cr
The remote control commands s/w/t are sent from the remote control unit to the
balance as ASCII code. After the balance having received the s/w/t commands, it will
send the following data.
Take into account that the following remote control commands must be sent
without a subsequent CR LF.
s Function: Stable weighing value for the weight is sent via the RS232
interface
w Function: Weighing value for the weight (stable or unstable) is sent via the
RS232 interface
t Function: No data are sent, the balance carries out the tare function.
h. Format for stable values for weight/quantity/percentage
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
B * B B B B B B B B 0 . 0 B g B B C
R
LF
i. Format in case of fault
1 2 3 4 5 6 7 8 9 10 11 12 13 14
B B B B B B B E r r o r CR LF
j. Format for unstable values for weight/quantity/percentage
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
B * B B B B B B B B 0 . 0 B CR LF
440-BA-e-0941 29
SYMBOLS:
B * = blank or M
B / 0 /. = blank / weight values / decimal dot, depending on the
measuring Value
g = weight unit / unit / %
E, o, r = ASCII code or “E, o, r"
CR = carriage return symbol
LF = line feed symbol
9.4 Output on bar code printer
The data transfer mode has to be set on ?BA Pr“ (chapter 8.5.1).
As bar code printer a Zebra printer model LP2824 is provided.
Take into account that the output format of the balance is fixedly defined and cannot
be changed.
The printer format is stored in the printer, i.e. in case of a failure the printer cannot be
changed with a new one from factory, previously it is necessary that KERN installs
the respective software.
The Zebra printer and the balance must be connected to the delivered interface cable
when they are switched off.
After switching-on both appliances, and after reaching the status ready-for-operation,
a label will be printed out when pressing the key.
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10 Service, maintenance, disposal
10.1 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 immediay.
10.2 Service, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
Before opening, disconnect from power supply.
10.3 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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11 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.
? The mains supply connection has been
interrupted (mains cable not plugged
in/faulty).
? Power supply interrupted.
? Batteries are inserted incorrectly or empty
? No batteries inserted.
The displayed weight is permanently
changing
? Draught/air movement
- ? Table/floor vibrations
? The weighing plate is in contact with
foreign matter.
? Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
The weighing value is obviously ? The display of the balance is not at zero
wrong ? 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.
440-BA-e-0941 32