KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Operating Manual
Precision balance
KERN PLE
Version 1.2
01/2008
GB
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
PLE-BA-e-0812
GB
KERN PLE
Version 1.2 01/2008
Operating Manual
Electronic Precision Balance
Table of Contents
1 TECHNICAL DATA............................................................................................. 5
1.1 Dimensions ............................................................................................................................... 6
2 DECLARATION OF CONFORMITY ................................................................... 7
3 BASIC INFORMATION (GENERAL) .................................................................. 8
3.1 Proper use................................................................................................................................. 8
3.2 Improper Use ............................................................................................................................ 8
3.3 Warranty .................................................................................................................................... 8
3.4 Monitoring of Test Resources................................................................................................. 8
4 BASIC SAFETY PRECAUTIONS ....................................................................... 9
4.1 Pay attention to the instructions in the Operation Manual .................................................. 9
4.2 Personnel training.................................................................................................................... 9
5 TRANSPORT AND STORAGE........................................................................... 9
5.1 Testing upon acceptance ........................................................................................................ 9
5.2 Packaging.................................................................................................................................. 9
6 UNPACKING, SETUP AND COMMISSIONING ................................................. 9
6.1 Installation Site, Location of Use............................................................................................ 9
6.2 Unpacking ............................................................................................................................... 10
6.2.1 Remove the transportation lock ........................................................................................... 10
6.2.2 Placing.................................................................................................................................. 11
6.2.3 Scope of delivery.................................................................................................................. 11
6.3 Mains connection ................................................................................................................... 12
6.4 Battery power supply............................................................................................................. 12
6.4.1 Battery charging status display ............................................................................................ 12
6.5 Connection of peripheral devices......................................................................................... 12
6.6 Initial Commissioning ............................................................................................................ 12
6.6.1 Switching on/off.................................................................................................................... 13
6.6.2 Stability display .................................................................................................................... 13
6.6.3 Balance zero display ............................................................................................................13
7 ADJUSTMENT.................................................................................................. 13
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8 OPERATING ELEMENTS................................................................................. 15
8.1 Backlit display ........................................................................................................................ 15
8.2 Keyboard overview................................................................................................................. 15
8.3 Overview of display................................................................................................................ 16
9 THE MENU........................................................................................................ 17
9.1 List of Menu Functions ..........................................................................................................17
9.2 Navigation in the menu..........................................................................................................18
10 BASIC OPERATION ..................................................................................... 19
10.1 Switching on/off ..................................................................................................................... 19
10.1.1 Stability display ................................................................................................................ 19
10.1.2 Balance zero display........................................................................................................ 19
10.2 Simple weighing ..................................................................................................................... 19
10.3 Weighing with taring .............................................................................................................. 19
10.3.1 Taring............................................................................................................................... 19
10.3.2 Delete tare ....................................................................................................................... 20
10.3.3 Numerical input of tare (PRE-TARE)............................................................................... 20
10.4 Standard weighing unit..........................................................................................................21
10.5 Temporary weighing unit switching (P4.2Funi) .................................................................. 22
11 MENU FUNCTION "P1 READ" BASIC SETTINGS ..................................... 23
11.1 Filter settings .......................................................................................................................... 23
11.2 Median Filter ........................................................................................................................... 24
11.3 Auto-Zero – Automatic Zeroing ............................................................................................ 25
11.4 Tare function........................................................................................................................... 26
12 MENU FUNCTION "P5 OTHR" - FURTHER USEFUL FUNCTIONS........... 27
12.1 Display background illumination.......................................................................................... 27
12.2 Intensity of backlighting ........................................................................................................ 28
12.3 Acoustic signal when button is pressed ............................................................................. 29
12.4 AUTO-OFF - Automatic switching-off .................................................................................. 30
12.5 Rechargeable battery charging options .............................................................................. 31
13 MENU FUNCTION "P4 FUNC" - OPERATING MODES.............................. 32
13.1 Settings for Function P4.1 FFun "ALL" ............................................................................... 33
13.2 Quantities (Function P4.3 PcS) ............................................................................................. 35
13.3 Weighing with tolerance range (Function P4.4 HiLo)......................................................... 38
13.4 Percentage calculation (Functions P4.5 PrcA/ P4.6 Prcb) ................................................. 40
13.4.1 Calculation of reference weight by weighing (P4.5 PrcA) ............................................... 40
13.4.2 Numerical input of the reference weight (P4.6 Prcb)....................................................... 41
13.5 Automatic Taring (Function P4.7 AtAr ................................................................................. 42
13.6 Peak value function (P4.8 toP) .............................................................................................. 43
13.7 Totalising of display values (Function P4.9 Add) ............................................................... 44
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3
13.7.1 Call-up of last saved display value .................................................................................. 46
13.8 Animal weighing function (P4.A AnLS)................................................................................ 47
13.9 PRE-TARE memory (P4.b tArE) ............................................................................................ 48
14 DATA OUTPUT RS 232 C............................................................................. 50
14.1 Pin allocation of the balance output plug (front view) ....................................................... 50
14.2 Menu function "P2 Prnt" - RS 232C Parameter .................................................................. 51
14.2.1 Navigation in the menu .................................................................................................... 51
14.2.2 Setting for data output type "P2.1 Pr_n".......................................................................... 52
14.2.3 Input of minimum weight "P2.2 S_Lo" ............................................................................. 53
14.2.4 Setting for Baud rate "P2.3" bAud” .................................................................................. 54
14.2.5 Parameters for RS232 interface "P2.4 S_rS" .................................................................. 54
14.3 Communication protocol / remote control commands ...................................................... 55
14.3.1 Response messages from balance ................................................................................. 55
14.4 Manual output ......................................................................................................................... 56
14.5 Continuous output ................................................................................................................. 57
15 ERROR MESSAGES..................................................................................... 58
16 SERVICE, MAINTENANCE, DISPOSAL ...................................................... 58
16.1 Cleaning .................................................................................................................................. 58
16.2 Service, maintenance............................................................................................................. 58
16.3 Disposal................................................................................................................................... 58
17 INSTANT HELP............................................................................................. 59
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PLE-BA-e-0812
1 Technical Data
KERN PLE 200-3 PLE 2000-2
Weighing range (max) 200 g 2000 g
Readability (d) 0.001 g 0.01 g
Reproducibility 0.002 g 0.02 g
Linearity ± 0.003 g ± 0.03 g
Recommended adjustment weight,
not added (class)
Minimum unit weight at
piece counting
Warm-up time 2 hours
Reference quantities at
piece counting
Weighing unit g, ct
Stabilization time (typical) 3 sec.
Electric Supply Mains adapter 220-240 V AC 50 Hz
Rechargeable batteries (standard) 6 x NIMH R6 (AA), service life with
background lighting approx.35 h/charging time
approx.10 h
Operating temperature + 15° C …. + 30° C
Humidity of air max. 90 % (not condensing)
200 g (F1) 2 kg (F1)
> 1 mg
10, 20, 50, freely selectable
Usable weighing space 150 x 138 x 60 mm
Weight kg (net) 1.7kg
Interface RS 232C
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5
1.1 Dimensions PLE 200-3:
PLE 2000-2:
6
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2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postbox 4052
email: info@kern-sohn.de
Phone: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Declaration of conformity
EC-Konformitätserklärung EC-Declaration of -Conformity
Déclaration de conformité EC-Declaración de Conformidad
ECEC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
D
GB
CZ
E
F
I
NL
P
PL
RUS
Konformitätserklärung
Declaration of
conformity
Prohlášení o
shode
Declaración de
conformidad
Déclaration de
conformité
Dichiarazione di
conformità
Conformiteitverklaring
Declaração de
conformidade
Deklaracja
zgodności
Заявление о
соответствии
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
We hereby declare that the product to which this declaration refers conforms
with the following standards.
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie
dotyczy, jest zgodny z poniższymi normami.
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
Electronic Balance: KERN PLE
Mark applied EU Directive Standards Title
2004/108/EC EN 55022: 2000 EMC
Date: 27.11.2007 Signature:
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
PLE-BA-e-0812
2006/95/EC EN 61010-1: 2004 Low Voltage
Gottl. KERN & Sohn GmbH
Management
7
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 weighing. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“ 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 or damage by media, liquids, natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded
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.
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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.
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.
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9
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 Remove the transportation lock
PLE 200-3
PLE 2000-2
10
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6.2.2 Placing
PLE 200-3
PLE 2000-2
Level balance with foot screws until the air bubble of the water balance is in the
prescribed circle.
6.2.3 Scope of delivery
Serial accessories:
• Balance
• Weighing plate
• Mains power supply
• Wind protection
• Rechargeable battery
• Operating Manual
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11
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 Battery power supply
The balance is fitted with rechargeable NiMH R6 (AA) batteries and plug-in power
pack as standard.
Use the provided power pack for battery charging.
During initial operation it is very important to charge the batteries for c. 12 hours.
Afterwards discharge the batteries completely 3 times (watch display message and
automatic disconnection) and recharge. If this is done, the life of the batteries will be
increased and the nominal capacity of the batteries reached.
For operation with rechargeable batteries the balance has some functions which can
be activated or deactivated in the menu; see Section 12.4.
If the AUTO-OFF function is activated, the balance switches off automatically to save
the rechargeable batteries after 5 minutes without load change.
If the symbol or “bat lo" appears in the display when switching on the balance, this
means that the capacity of the rechargeable batteries will soon be exhausted, charge
the rechargeable batteries as soon as possible.
This symbol will pop up every 2 seconds during the charging process.
6.4.1 Battery charging status display
⇒ Press simultaneously +
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.
12
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6.6.1 Switching on/off
Start-up Press the ON/OFF button for approx. 0.5 sec.
The balance will carry out a self-test The balance is ready for
weighing when the weight display appears.
Switching Off Press the ON/OFF button for approx. 0.5 sec.
-OFF- appears briefly before the display disappears.
6.6.2 Stability display
The appearance of the stability symbol [ ] on the display indicates that the
weighing plate is in a stable state. If the status is instable the [ ] display
disappears.
6.6.3 Balance zero display
Should the balance not display exactly zero despite empty scale pan, press the
button. The balance starts with resetting to zero [ a ] .
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.
Procedure when adjusting:
Calibration should be carried out by using a recommended calibration weight.
(See chpt. 1 “Technical specifications“):
Observe stable environmental conditions. A warm-up time of 2 hours is necessary for
stabilisation.
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13
⇒ +
⇒
⇒
⇒
⇒
The weight value of the required adjustment weight will pop up:
Place the required calibration weight carefully in the centre of the weighing plate and
press the PRINT key. CAL appears on the display, adjustment is automatically
started.
Once the adjustment has been completed, unLoAd will appear in the display
Take away adjustment weight
• Return to weighing mode
Press the button repeatedly until the "SAVE"? inquiry appears.
Confirm the inquiry by pressing the button to save the changes and to return to
Weighing mode.
-or-
press the button to return to Weighing mode without saving.
14
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8 Operating elements
8.1 Backlit display
Very contrastful display which can also be red in the darkness.
8.2 Keyboard overview
Key Function in Operating mode
• Switch machine on/off
• Function key
• Set balance to zero
• Data output
• Tare balance
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15
8.3 Overview of display
No. Display Description
1. FIL
2. bAud
3. HiLo
4. rEPL
5. StAb
6. Auto
7. t1
8. toP
9. Add
10. AnLs
11.
tArE
Filter setting
RS 232 interface speed
+/- tolerance with respect to reference weight
Automatic display printout
Printing will be started as soon as the stability
display appears
Monitoring weight display at 0
Automatic cutout
Maximum weight storage
Totalising symbol
Symbol for animal weighing function
Symbol for PRE-TARE function (pre-tare
deduction)
12. →0←
13. [ ]
14. PCS
15. g (kg)
16.
17. Net
18.
19.
20.
Balance zero display
Stability display
Symbol for "Piece-counting" mode
Symbol for "Weighing" mode
Battery very low.
Tara symbol
+/- tolerance with respect to reference weight entry
of lower limit or weight below tolerance
+/- tolerance with respect to reference weight within
prescribed limits
+/- tolerance with respect to reference weight entry
of upper limit or weight above tolerance
16
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9 The menu
The individual elements of the Menu system (Main menu, Submenu and Settings) are
displayed with a P Number and an abbreviation.
The number abbreviations for the menus can be found in the List of Menu Functions
below.
9.1 List of Menu Functions
P1 rEAd [Basic settings, see chap. 11]
P1.1 FiL | 2 Filter settings
P1.2 Auto | YES Auto Zero
P1.3 tArA | no Tare function
P1.4 Fnnd | no Median Filter
P2 Prnt [RS 232 Parameter, see chap. 14.2]
P2.1 Pr_n | StAb Setting data output type
P2.2 S_Lo | Entering minimum weight
P2.3 bAud | 9600 Setting baud rate
P2.4 S_rS | 8d1SnP Setting transmission parameter
P3 Unit [Weighing units, see chap. 10.4]
P3.1 StUn | kg Setting standard weighing unit
P4 Func [Operating modes, see chap. 13]
P4.1 FFun | ALL selection enabled operating modes
P4.2 Funi | No Weighing units switch-over
P4.3 PcS | No Parts counting
P4.4 HiLo | No Tolerance weighing
P4.5 PrcA | No Percentage weighing (by means of weighing)
P4.6 Prcb | No Percentage weighing (by manual entry)
P4.7 AtAr | No Automatic taring
P4.8 toP | No Peak value function
P4.9 thêm vào No Adding
P4.A AnLS | No Animal weighing
P4.b tArE | No PRE-TARE
P5 othr [Further useful functions, see chap. 12]
P5.1 bL | Auto Display background illumination
P5.2 bLbt | 50 Intensity of backlighting
P5.3 bEEP | YES Key sound
P5.4 t1 | no AUTO-OFF
P5.5 CHr6 | no Rechargeable battery charging function
switch-off
P6 CAL [Adjustment, see chap. 7]
P6.1 St_u | not documented
P6.2 uCAL | Adjustment
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17
9.2 Navigation in the menu
Keyboard overview in menu:
Key Function in Menu
+
+
Storing / jumping back to weighing mode
Any changes made in the balance memory will only be saved when the storing
process is complete.
• Access to Main menu
• Numeric entering of tara weight
• Scroll back
• Menu selection
• Changing parameter value
• Increase in the numerical value of a figure by "1"
• Submenu/Parameter call-up
• Shift and select number to be changed to the right
• Confirm/save settings
• Quit function without changing the settings
• Back to menu
To achieve this, press the key several times until “SAVE“? appears.
Any changes carried out are stored by pressing the key.
To cancel changes, press the key.
Afterwards the balance automatically jumps back to weighing mode.
18
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10 Basic Operation
10.1 Switching on/off
Start-up Press for approx. 0.5 sec.
The balance will carry out a self-test The balance is ready for
weighing when the weight display appears.
Switching Off Press for approx. 0.5 sec.
-OFF- appears briefly before the display disappears.
10.1.1 Stability display
The appearance of the stability symbol [ ] on the display indicates that the
weighing plate is in a stable state. If the status is instable the [ ] display
disappears.
10.1.2 Balance zero display
Should the balance not display exactly zero despite empty balance pan, wait for
stability display and press the button. The balance start with resetting to zero
and the symbol "a" will appear.
Zeroing is only possible in the range ± 2% MAX (Err2).
10.2 Simple weighing
1. Place goods to be weighed on balance
2. Wait until the stability display appears [ ]
3. Read weighing result
10.3 Weighing with taring
The dead weight of any weighing container may be tared away by pressing a button
or by numerical input, so that the following weighings show the net weight of the
goods to be weighed.
10.3.1 Taring
Ö Put on weighing receptacles and press . The zero display and the symbol
Net will appear.
The tare weight is saved until it is deleted.
Information:
The tare procedure can be repeated as many times as necessary, for example
with initial weighing of several components for a mix (add-on weighing). The
limit is reached when the total weighing range capacity is full. After removing
the taring container the total weight is displayed as negative display.
Taring is not possible with negative display values or zero display (Err3).
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19
10.3.2 Delete tare
Ö Unload balance and press the button.
The Net symbol goes out and the zero display appears.
10.3.3 Numerical input of tare (PRE-TARE)
Ö In Weighing mode press simultaneously the and button.
Ö Select the point to be changed by pressing the button and the number by
pressing the button and the active point flashes in each case.
Ö Confirm with button. The input weight is automatically saved as tare
weight, the Net symbol and the tare weight with minus sign will appear.
Ö Place the filled receptacles on the balance. The net weight will appear in the
display.
Note:
The balance can save up to 10 PRE-TARE values, see chap. 13.9
Delete tare:
Ö Press button. The Net symbol goes out, the zero display appears.
20
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10.4 Standard weighing unit
Selected weighing unit will be retained even after disconnection from the mains.
⇒ +
⇒
⇒
⇒
Ö Press the button again; the currently set weighing unit is flashing
⇐
g ⇔ ct
Ö Press the button as often as necessary until the required weighing unit
appears
⇒
The balance returns to menu.
Ö Press the button repeatedly until "SAVE"? appears.
Save changes by pressing the button.
The balance returns to weighing mode; the display show the set weighing unit.
The set weighing unit remains even after disconnection from the mains.
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g
21
10.5 Temporary weighing unit switching (P4.2Funi)
The weight unit selected as follows does not remain after disconnection from the
mains.
Condition: Function "P4.2 Funi" activated (yes).
⇒
⇒
⇒
g ⇔ ct
⇒
g
22
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11 Menu function "P1 rEAd" basic settings
Basic settings can be changed and functions activated in Menu "P1 rEAd". It is now
possible to change individual weighing requirements.
11.1 Filter settings
This menu item allows the balance to be set according to specific ambient conditions
and measuring purposes.
Call up menu:
Ö Press the + button simultaneously, "P1 rEAd" will appear
⇒
⇒
⇒ Press the button as often as
necessary until the required setting
appears:
1 = sensitive and fast
↓
4 = insensitive but slow
⇒
Ö Press the button repeatedly until the "SAVE"? inquiry appears.
Confirm the inquiry by pressing the button to save the changes and to
return to Weighing mode.
-or-
press the
button to return to Weighing mode without saving.
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23
11.2 Median Filter
Especially useful in case of impacts or shocks (average value formation).
Call up menu:
Ö Press the + button simultaneously, "P1 rEAd" will appear
⇒
⇒
⇒
⇒ Press repeatedly until the wanted setting
appears (no = off, yes = on)
⇒
Ö Press the button repeatedly until the "SAVE"? inquiry appears.
Confirm the inquiry by pressing the button to save the changes and to
return to Weighing mode.
-or-
press the button to return to Weighing mode without saving.
24
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11.3 Auto-Zero – Automatic Zeroing
This 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. (e.g. slow flow of liquids from a container placed on
the balance, evaporating processes).
When apportioning involves small variations of weight, it is advisable to switch off this
function.
Call up menu:
Ö Press the + button simultaneously, "P1 rEAd" will appear
⇒
⇒
⇒
⇒ Press repeatedly until the wanted
setting appears (no = off, yes = on)
⇒
Ö Press the button repeatedly until the "SAVE"? inquiry appears.
Confirm the inquiry by pressing the
button to save the changes and to
return to Weighing mode.
-or-
press the
PLE-BA-e-0812
button to return to Weighing mode without saving.
25
11.4 Tare function
The following tare functions can be set with this function:
AtAr Automatic Taring switched on remains saved even after disconnection from
the mains (For specification see chap. 13.5)
no Automatic Taring switched off
tArF The last tare value is saved and remains saved even after disconnection from
the mains. This appears as a minus value with the NET symbol when the
balance is switched on.
Ö Press the + button simultaneously, "P1 rEAd" will appear
⇒
⇒
⇒
⇒ Press the button as often as
necessary until the required setting
appears:
⇒
Ö Press the
Confirm the inquiry by pressing the
button repeatedly until the "SAVE"? inquiry appears.
button to save the changes and to
return to Weighing mode.
-or-
26
press the button to return to Weighing mode without saving.
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12 Menu function "P5 Othr" - Further useful functions
Here, you can set the parameters that influence the operation of the balance, such as
background lighting and key sounds.
12.1 Display background illumination
Ö Press the + button simultaneously, "P1 rEAd" will appear
⇒ Press repeatedly.
⇒
⇒
⇒ Press the button as often as
necessary until the required setting
appears:
⇒
no = Background illumination on
yes = Background illumination off
Auto The background illumination will be switched off
automatically 10 sec after having reached a stable weighing value.
Ö Press the button repeatedly until the "SAVE"? inquiry appears.
Confirm the inquiry by pressing the button to save the changes and to
return to Weighing mode.
-or-
press the button to return to Weighing mode without saving.
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27
12.2 Intensity of backlighting
To optimize readability and energy consumption, the intensity of the background
lighting can be adjusted from 0 to 100%. Low intensity prolongs battery life.
Ö Press the + button simultaneously, "P1 rEAd" will appear
⇒ Press repeatedly.
⇒
⇒
⇒ Press the button as often as necessary
until the required setting appears:
⇒
Ö Press the
Confirm the inquiry by pressing the
button repeatedly until the "SAVE"? inquiry appears.
button to save the changes and to
return to Weighing mode.
-or-
press the button to return to Weighing mode without saving.
28
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12.3 Acoustic signal when button is pressed
Ö Press the + button simultaneously, "P1 rEAd" will appear
⇒ Press repeatedly.
⇒
⇒
⇒
⇒ Press the button as often as necessary
until the required setting appears (no = off,
yes = on)
⇒
Ö Press the
Confirm the inquiry by pressing the
button repeatedly until the "SAVE"? inquiry appears.
button to save the changes and to
return to Weighing mode.
-or-
press the button to return to Weighing mode without saving.
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29
12.4 AUTO-OFF - Automatic switching-off
If the AUTO-OFF function is activated, the balance switches off automatically to save
the rechargeable batteries after 5 minutes without load change.
Function
Adjustment
Mains power
supply
Battery power
supply
t1 = no deactivated deactivated
t1 = YES activated activated
t1 = Auto deactivated activated
Ö Press the + button simultaneously, "P1 rEAd" will appear
⇒ Press repeatedly.
⇒
⇒ Press repeatedly.
⇒
⇒ Press the button as often as necessary
until the required setting appears:
⇒
Ö Press the button repeatedly until the "SAVE"? inquiry appears.
30
Confirm the inquiry by pressing the button to save the changes and to
return to Weighing mode.
-or-
press the button to return to Weighing mode without saving.
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12.5 Rechargeable battery charging options
When using non-rechargeable batteries, the rechargeable battery charging function
"5.5 cHr6" must be set to "no" with this function. There is risk of explosion in the
event of non-compliance.
Ö Press the + buttons simultaneously, "P1 rEAd" will appear
⇒ Press repeatedly.
⇒
⇒ Press repeatedly.
⇒
⇒ Press the button as often as necessary
until the required setting appears:
⇒
no Rechargeable battery charging function switched off, the rechargeable
battery charging symbol will not pop up. "bAtt" appears when the
balance is switched on.
YES Rechargeable battery charging function switched on. This symbol
will pop up every 2 seconds during the charging process. "nImh" (NiMH
R6 rechargeable batteries) will appear when the balance is switched on.
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31
13 Menu function "P4 Func" - Operating modes
Functions can be selected in Menu "4.1.FFun", which are then made available to the
operator without having to access the menu every time. All activated operating
modes can be called directly by pressing the button. Menu activation:
⇒ Press buttons + at the same time
⇒ Press repeatedly.
⇒
A function can only be activated directly in Menu "4.1.FFun".
If it should only be possible to call up one Operating mode by pressing the
button, simply select the required function by pressing
the button and confirm by pressing the button.
If it should be possible to call up several Operating modes by pressing the
button, select the "ALL" function by pressing the button and confirm by
pressing the button. The selection as to which Operating modes are
deposited in "ALL" is made in the next chapter 13.1.
⇒
⇒
32
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Ö Confirm settings by pressing the button. Balance jumps back to sub-
menu 4.1.FFun.
Return to weighing mode:
Ö Press the button repeatedly until the "SAVE"? inquiry appears.
Confirm the inquiry by pressing the button to save the changes and to
return to Weighing mode.
-or-
press the button to return to Weighing mode without saving.
13.1 Settings for Function P4.1 FFun "ALL"
The selection of the menu items, which can then be called up by pressing the
button, is made at this point.
⇒
⇒ Press repeatedly.
⇒
⇒ Choose
⇒ Confirm
no = Function deactivated
YES = Function activated
Please repeat this sequence of operations for any other operating mode available.
Return to weighing mode:
Ö Press the button repeatedly until the "SAVE"? inquiry appears.
Confirm the inquiry by pressing the button to save the changes and to
return to Weighing mode.
-or-
press the button to return to Weighing mode without saving.
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33
Ö All activated operating modes can now be called up in Weighing mode by
pressing the button.
Example of call-up of Tolerance weighing function:
Press the button in Weighing mode and the initial activated
function will appear:
⇒
⇒
⇒
Back to Weighing mode with .
34
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13.2 Quantities (Function P4.3 PcS)
Before the balance can count parts, it must know the average part weight (i.e.
reference). Proceed by putting on a certain number of the parts to be counted. The
balance determines the total weight and divides it by the number of parts, the socalled reference quantity. Counting is then carried out on the basis of the calculated
average piece weight.
As a rule:
The higher the reference quantity the higher the counting exactness.
• Call add-up function
⇒
⇒
Select the required reference quantity by pressing the button.
• Reference piece number 10, 20 or 50
⇒
⇒
⇒
⇒
Confirm selected reference quantity (e.g. 20) by pressing the button.
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35
• Make reference
Place as many pieces to add-up as required by the set reference piece number.
⇒
⇒
Tare, as required
⇒
Remove reference weight. The balance is now in parts counting mode counting all
units on the weighing plate.
• for selection ”optional reference piece number“ FrEE
⇒
⇒
⇒
36
− Select the point to be changed by pressing the button.
− Select the figure by pressing the button
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− Confirm input reference quantity by pressing the button
− “LoAd“ appears on the display.
P− lace as many counting parts on the balance as the set reference quantity
−
requires, confirm by pressing the button.
− Remove reference weight. The balance is now in parts counting mode
counting all units on the weighing plate.
• Return to weighing mode
Press button repeatedly
Information:
If there is no load on the weighing plate when the -button is pressed, “Er5 outr“
will appear briefly on the display before the display of the balance returns
automatically to weighing mode.
If the unit weight is smaller than the readout (d), error message -Err5- will appear
and the balance display will return automatically to Weighing mode.
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37
13.3 Weighing with tolerance range (Function P4.4 HiLo)
For weighing with tolerance ranges you can enter individual upper and lower limits.
For tolerance controls such as dosaging, apportioning or sorting the scale will display
violated upper or lower limits and show the tolerance tag.
The tolerance marks (Min, Ok, Max) in the top section of the display indicate whether
the goods to be weighed are within the two tolerance limits.
The tolerance markers are only in operation during operating mode tolerance
weighing; they are otherwise not visible.
The tolerance marker provides the following information:
OK
Min
• Call function
Min
Ok
Max
Min
OK
Max
Goods to be weighed below tolerance limit
Goods to be weighed within tolerance
range
Goods to be weighed above tolerance limit
0.000
⇒
g
⇒
⇒
38
⇒
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• Set lower tolerance limit "Min"
Min
Min
000.000
− Select the point to be changed by pressing the button and the active
point flashes in each case.
− Select the figure by pressing the button
− Confirm the input lower tolerance limit by pressing the button
• Set the upper tolerance limit "Max"
Max
000.000
− Select the point to be changed by pressing the button and the active
point flashes in each case.
− Select the figure by pressing the button
000.850
Max
002.854
− Confirm the input upper tolerance limit by pressing the button
Min
a
The balance is now in checkweighing mode Put on goods to be weighed, tolerance
control is started
• Return to weighing mode
Press
Information:
If invalid values are entered such as lower tolerance limit greater than upper
tolerance limit, the balance will issue the error message (-lo-) and return
automatically to weighing mode.
button repeatedly
0.000
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39
13.4 Percentage calculation (Functions P4.5 PrcA/ P4.6 Prcb)
Percent determination allows weight display in percent, in relation to a reference
weight.
13.4.1 Calculation of reference weight by weighing (P4.5 PrcA)
⇒
⇒
⇒
Place the reference weight
⇒ Confirm with
Weight is taken as reference (100%)
Remove reference weight. The balance is now in percent determining mode
Place the load on the balance; percentage value in relation to reference body is
shown on display:
40
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13.4.2 Numerical input of the reference weight (P4.6 Prcb)
• Call function
⇒
⇒
⇒
• Make reference
− You will be asked to enter the reference weight by a flashing message.
⇒
− Select the point to be changed by pressing the button and the active
point flashes in each case.
⇒⇒
− Select the figure by pressing the
button
− Confirm the input reference weight by pressing the button
The balance is now in percent determining mode Place the load on the balance;
percentage value in relation to reference body is shown on display:
• Return to weighing mode
Press repeatedly button
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41
13.5 Automatic Taring (Function P4.7 AtAr
This function is to be used for faster calculation of the net weight, in case the tare
load changes for each weighing.
• Call function
⇒
⇒
⇒
1. Deposit weighing receptacles
2. The receptacle weight is automatically saved as tare weight, the zero
display and NET symbol will appear
3. Weigh goods and read result
4. Remove goods and receptacle
5. Deposit next weighing receptacle and repeat Steps 2 - 4.
• Return to weighing mode
Press
button repeatedly
Note:
Ensure that the input of the minimum weight (For setting see chap. 14.2.3) is smaller
than the weight of the weighing receptacle otherwise the weighing receptacle will not
be tared automatically.
42
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13.6 Peak value function (P4.8 toP)
This function displays the highest load value (peak value) of a weighing.
⇒
⇒
⇒
The balance is not in Peak value mode and the "Max" symbol pops up.
Max
a
0.000
Ö Load weighing plate. The maximum load value is displayed.
Ö The peak value remains in the display until the button is pressed. Then the
balance is ready for further measurements.
• Return to weighing mode
Press button repeatedly.
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43
13.7 Totalising of display values (Function P4.9 Add)
Any number or individual weighings are automatically added to a total, e.g. all
individual weighings of a batch.
When the standstill control ( ) is complete the weighing value is automatically
issued to the optional printer. The displayed value is added into the total adding
memory. Afterwards automatic taring will take place. This is repeated newly every
subsequent time a new sample is placed on the balance. When the last single
weighing process is finished, press the [ON/OFF] key to receive the total sum
("TOTAL=").
• Call function
⇒
⇒
⇒
Ö Deposit weight A
Ö After successful stop check ( ) press the button. The display value is
added to the totalising memory (Symbol "▲" pops up top right) and output to the
optional printer.
Ö Remove weight and the balance returns to zero
Ö Put on weight B
Ö After successful stop check ( ) press the button. The total of both
weighing processes appears (Symbol "▲" pops up top right) The result is output
to the optional printer.
44
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Ö Add and weigh more parts if needed as described above. Please note that the
balance must be unloaded between the individual weighing procedures. This
process can be repeated as often as necessary until the display range of the
balance is exhausted (Display "5-FULL").
Ö Upon completion of the last individual weighing process, the total (TOTAL) of all
the weighing processes will be output to the optional printer by pressing the
button once more.
(1) 1912 kg
(2) 1912 kg
------------------------------TOTAL: 3824 kg
If "P" pops up in the display after pressing the button, the balance is ready for a
further totalising process.
If "unLoAd" pops up in the display after pressing the button, unload the
weighing plate and wait for the zero display with symbol "P". Then the balance is
ready for a further totalising process.
• Return to weighing mode
Press the button and ESC appears,
Press the button to return to Weighing mode or press the button to
return to Totalising mode.
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45
13.7.1 Call-up of last saved display value
In the event of disruption to the totalising process e.g. by disconnection from the
mains, the last saved display value can be called up as follows:
⇒
⇒
⇒
If "P" pops up in the display after pressing the button, the balance is ready for a
further totalising process.
If "unLoAd" pops up in the display after pressing the button, unload the
weighing plate and wait for the zero display with symbol "P". Then the balance is
ready for a further totalising process.
• Return to weighing mode
Press the button and ESC appears,
Press the button to return to Weighing mode or press the button to return
to Totalising mode.
46
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13.8 Animal weighing function (P4.A AnLS)
Use this function for weighing agitated goods (e.g. animals) or in the event of strong
vibrations During a certain period of time the balance determines weight values and
calculates an average.
Call function
⇒
⇒
⇒
Ö Press the button to select the time span (sec) for averaging
⇒
⇒
⇒
⇒
⇒
⇒
⇒
Ö Confirm selection by pressing the button.
Ö Place goods to be weighed on the balance. If the minimum weight (see chap.
14.2.3) is exceeded, weighing starts automatically.
Horizontal segments appear in the display during weighing, then the result is
displayed with the symbol "OK".
Ö Remove goods from balance in order to be able to carry out a new weighing
process.
• Return to weighing mode
Press button repeatedly
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47
13.9 PRE-TARE memory (P4.b tArE)
• Call function
⇒
⇒
⇒
⇒
• Input of PRE-TARE value
Ö Select the point to be changed by pressing the button and the number by
pressing the button and the active point flashes in each case.
Ö Confirm by pressing the button
Either
Ö Press the button again. The input weight is automatically saved as tare
weight, the Net symbol and the tare weight with minus sign will appear.
or
Ö Press the button to enter further PRE-TARE values and "tArE 1"
appears. Enter PRE-TARE value for "tArE 1" as described above. Further
PRE-TARE values can be saved in "tArE 2" etc.
48
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• Call-up of PRE-TARE value
⇒
⇒
⇒
⇒ or call up further values ("tArE 2" etc.) with button
Ö Confirm with button. The Net symbol and the saved tare weight with
minus sign appear.
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49
14 Data output RS 232 C
Technical data:
• Baud rate -2400 - 38400 Baud
• Databits -7, 8
• Stop bits -1, 2
• Parity bit -no, even, odd
• For operation with interface faultless operation is only ensured with the correct
KERN – interface cable (max. 2m)
Transfer modes:
• Manually after pressing the PRINT key
• Continuously, according to setting
• Automatically according to stability display
• Prompted by external device (For remote control commands see chpt.
14.3)
Output conditions:
• stable – output in the event of stable weighing value
• any – sequential output by pressing the PRINT button (Marks in the printout:
<?>)
14.1 Pin allocation of the balance output plug (front view)
5 1
Pin 2: Receive data
Pin 3: Transmit data
Pin 5: Signal ground
9 6
50
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14.2 Menu function "P2 Prnt" - RS 232C Parameter
Menu overview
P2.1 Pr_n Setting data output type
P2.2 S_Lo Entering minimum weight
P2.3 bAud Setting baud rate
P2.4 S_rS Setting transmission parameter
14.2.1 Navigation in the menu
Ö Press the
and buttons simultaneously in Weighing mode and the first
Menu point "P2 Prnt" will appear
Ö Press the
button and "P2 Prnt" will appear
Ö Confirm by pressing the button and the first submenu "2.1 Pr_n" will appear
Ö For further selection press the button until the required setting appears
2.1 Pr_n →2.2 S_Lo →2.2 Pr_n → 2.3 bAud →P2.4 S_rS
Ö Press the button and the current setting will flash
Ö Press the button until the required setting appears
Ö Confirm setting with . Weighing balance returns to menu. If desired, carry
out settings for further menu items as described above.
Return to weighing mode
Ö Press the
Confirm the inquiry by pressing the
button repeatedly until the "SAVE"? inquiry appears.
button to save the changes and to
return to Weighing mode.
-or-
press the button to return to Weighing mode without saving.
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51
14.2.2 Setting for data output type "P2.1 Pr_n"
⇒
⇒
⇒
⇒
noStAb immediate data output, even if not stable (PRINT key)
StAb Data output for stable weighing value (PRINT key)
rEPL Automatic output function (See chpt. 14.2.3)
CntA continuous output in standard weighing unit
Cntb continuous output in current weighing unit
52
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14.2.3 Input of minimum weight "P2.2 S_Lo"
The minimum weight affects the following functions:
Automatic taring (chap.13.5):
In order to apply this function, the weight of the weighing plate must have dropped
below the entered weighing value first, before another greater weight can be tared
automatically.
Automatic output function "rEPL" (chap. 14.2.2):
If the current weighing value exceeds the entered weighing value, a weighing value
will be issued automatically. The next weighing value will not be issued unless the
weighing value has meanwhile dropped below the entered weighing value.
For animal weighing see chap. 13.8
If the minimum weight is exceeded, weighing starts automatically.
⇒
⇒
⇒
⇒
⇒
⇒
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53
14.2.4 Setting for Baud rate "P2.3" bAud”
⇒
⇒
⇒
⇒
14.2.5 Parameters for RS232 interface "P2.4 S_rS"
⇒
⇒
⇒
⇒
54
7d2SnP : 7 data bit, 2 stop bit, no parity
7d1SEP : 7 data bit, 1 stop bit, EVEN parity
7d1SoP : 7 data bit, 1 stop bit, ODD parity
8d1SnP : 8 data bit, 1 stop bit, no parity
8d2SnP : 8 data bit, 2 stop bit, no parity
8d1SEP : 8 data bit, 1 stop bit, EVEN parity
8d1SoP : 8 data bit, 1 stop bit, ODD parity
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14.3 Communication protocol / remote control commands
Instruction: Remote control instructions
Z
T
S
SI
SU
SUI
C1
C0
CU1
CO1
PC
Set weight display at zero
Taring
Send stable weighing value in standard weighing unit
Send weighing value immediately in standard weighing unit
Send stable weighing value in current weighing value
Send weighing value immediately in current weighing unit
Turn on continuous transmission in standard weighing unit
Turn off continuous transmission in standard weighing unit
Turn on continuous transmission in current weighing unit
Turn off continuous transmission in current weighing unit
Send all implemented instructions
Complete each instruction with CR LF.
14.3.1 Response messages from balance
Instruction: Response messages from balance
XX_
XX_A CR LF
XX_D CR LF
XX_I CR LF
XX _ ^ CR LF
XX _ v CR LF
XX _ E CR LF
Instruction:
Instruction accepted; will be executed
Instruction complete (appears after XX_A only)
Instruction received; impossible to carry out
Instruction received but time overflow error occurred
Instruction received, but insufficient load
Error during execution, timeout for stable weighing value
exceeded
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55
Data record format:
1-3 4 5 6 7-15 16 17 18 19
Instruction:
Stability indicator [blank space], if stable
[?] if not stable
[^] if overload
[v] if underload
Presign: [blank space] if positive
[-] if negative
Weight: 9 signs, right justified
Unit: 3 signs, left justified
Instruction: 3 signs, left justified
14.4 Manual output
The user can start output manually by pressing the PRINT-key (for settings see
chapter 14.2.2).
Data record format:
1 2 3 4 - 12 13 14 - 16 17 18
Stability indicator
Blank
Signs
Weight
Blank
Unit
CR
LF
Stability indicator
Blank
Signs
Stability indicator [blank space], if stable
[?] if not stable
[^] if overload
[v] if underload
Presign: [blank space] if positive
[-] if negative
Weight: 9 signs, right justified
Unit: 3 signs, left justified
56
Weight
Blank
Unit
CR
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LF
14.5 Continuous output
The balance may be operated in a mode enabling continuous output of weighing
result. This mode can be turned on/off by commands via RS232. (For settings see
chap. 14.2.2).
C1 CR LF - Continuous transfer in standard weighing unit on
C0 CR LF - Continuous transfer in standard weighing unit off
Data record format:
1 2 3 4 5 6
7-
15
16 17 18 19 20 21
S
CU1 CR LF - Continuous transfer in current weighing unit on
CU0 CR LF - Continuous transfer in current weighing unit off
Data record format:
1 2 3 4 5 6
S
I
U
Blank
I
Stability indicator
Blank
Signs
Weight
7-
15
Blank
16 17 18 19 20 21
CR
Unit
CR
LF
LF
Stability indicator
Stability indicator [blank space], if stable
[?] if not stable
[^] if overload
[v] if underload
Presign: [blank space] if positive
[-] if negative
Weight: 9 signs, right justified
Unit: 3 signs, left justified
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Blank
Signs
Weight
Blank
Unit
57
15 Error messages
Err2
Err3
Err4
Err5
Err7
Err8
NULL
FULL2
LH
5-FULL
Value outside zero range
Value outside taring range
Calibration weight outside allowable range (+-1% for calibration
weight)
Piece weight smaller than readability
Disconnection time was too short (should be more than 3
seconds)
Input outside permissible range
Impossible to carry out taring / resetting
Weighing range exceeded
Initial weight error Weight of weighing plate outside allowable
tolerance of 10%
Display range exceeded upon totalising
16 Service, maintenance, disposal
16.1 Cleaning
Before cleaning, please disconnect the appliance from the operating voltage.
Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth
dampened with mild soap suds. Ensure that no liquid penetrates into the device and
wipe with a dry soft cloth.
Loose residue sample/powder can be removed carefully with a brush or manual
vacuum cleaner.
Spilled weighing goods must be removed immediately.
16.2 Service, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
Before opening, disconnect from power supply.
16.3 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.
58
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17 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 displayed weight is
permanently changing
The weighing result is
obviously incorrect
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
• The balance is not switched on.
• The mains supply connection has been interrupted
(mains cable not plugged in/faulty).
• Power supply interrupted.
• (Rechargeable) batteries are inserted incorrectly or
empty
• No (rechargeable) batteries inserted.
• Draught/air movement
• Table/floor vibrations
• Weighing plate has contact with other objects.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
• The display of the balance is not at zero
• Adjustment is no longer correct.
• Great fluctuations in temperature.
• Warm-up time was ignored.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
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