KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating Manual
Precision balances
KERN PLE-N
Version 2.2
02/2012
GB
PLE-N-BA-e-1222
2
GB
KERN PLE-N
Version 2.2 02/2012
Operating Manual
Precision balances
Table of Contents
1 Technical Data ............................................................................................... 4
2 Declaration of conformity ............................................................................. 5
3 Basic Information (General) .......................................................................... 6
3.1 Proper use ................................................................................................................ 6
3.2 Improper Use ........................................................................................................... 6
3.3 Warranty ................................................................................................................... 6
3.4 Monitoring of Test Resources ................................................................................ 6
4 Basic Safety Precautions .............................................................................. 7
4.1 Pay attention to the instructions in the Operation Manual ................................... 7
4.2 Personnel training ................................................................................................... 7
5 Transportation & Storage .............................................................................. 7
5.1 Testing upon acceptance ........................................................................................ 7
5.2 Packaging / return transport ................................................................................... 7
6 Unpacking, Setup and Commissioning ....................................................... 8
6.1 Installation Site, Location of Use ........................................................................... 8
6.2 Unpacking ................................................................................................................ 8
6.2.1 Placing ........................................................................................................................................ 8
6.2.2 Scope of delivery / serial accessories......................................................................................... 8
6.3 Appliance overview ................................................................................................. 9
6.4 Controls ...................................................................................................................10
6.4.1 Overview of display ................................................................................................................... 10
6.4.2 Keyboard overview ................................................................................................................... 10
6.5 Connect and switch-on power supply ..................................................................11
6.6 Rechargeable battery operation ............................................................................11
6.7 Connection of peripheral devices .........................................................................12
6.8 Initial Commissioning ............................................................................................12
6.8.1 Stability display ......................................................................................................................... 12
6.8.2 Balance zero display ................................................................................................................. 12
7 Adjustment ................................................................ ................................ ... 12
7.1.1 Adjustment with recommended adjustment weight (factory setting) ........................................ 13
7.1.2 Adjustment with weights of other nominal values ..................................................................... 14
PLE-N-BA-e-1222
8 Basic Operation ........................................................................................... 15
9 User menu .................................................................................................... 16
9.1 Weighing unit ..........................................................................................................19
9.2 Data output type .....................................................................................................20
9.3 Baud rate .................................................................................................................21
9.4 Auto Zero .................................................................................................................22
9.5 Filter .........................................................................................................................24
9.6 Standstill control display .......................................................................................25
9.7 Display background illumination ...........................................................................26
9.8 Automatic switch-off function „AUTO OFF“ in stand-by mode ...........................27
10 User menu .................................................................................................... 28
10.1 Parts counting ........................................................................................................29
10.1.1 Switching over between quantity and weight display ............................................................ 31
10.1.2 Automatic reference optimization ......................................................................................... 31
10.1.3 Numeric entering of the reference weight ............................................................................ 32
10.2 Density determination (Hydrostatic weighing) .....................................................33
10.2.1 Density determination of solids ............................................................................................ 33
10.2.2 Determining density of liquids .............................................................................................. 35
10.3 Checkweighing .......................................................................................................37
10.4 Percent determination ............................................................................................39
10.4.1 Entering the reference weight by weighing ........................................................................... 39
10.4.2 Numeric entering of the reference weight ............................................................................ 40
10.5 Peak value function ................................................................................................41
11 Data output RS 232C ................................................................................... 42
11.1 Technical Data ........................................................................................................42
11.2 Pin allocation of balance output plug ...................................................................42
11.3 Interface ..................................................................................................................43
11.4 Data transfer ...........................................................................................................43
11.5 Format for data transmission ................................................................................44
11.6 Remote control instructions ..................................................................................45
11.7 Printer mode ...........................................................................................................45
12 Error messages ............................................................................................ 47
13 Service, maintenance, disposal .................................................................. 47
13.1 Cleaning ..................................................................................................................47
13.2 Service, maintenance .............................................................................................47
13.3 Disposal...................................................................................................................47
14 Instant help ................................................................................................... 48
PLE-N-BA-e-1222 3
4
1 Technical Data
KERN
PLE 420-3N
PLE 4200-2N
Weighing range (max)
420 g
4200 g
Readability (d)
0.001 g
0.01 g
Reproducibility
0.002 g
0.02 g
Linearity
± 0.004 g
± 0.04 g
Stabilization time (typical)
2 sec
2 sec
Minimum unit weight at
piece counting
0.005 g
0.05 g
Warm-up time
4 hours
Recommended adjustment
weight, not added (class)
400 g (E2)
4000 g (E2)
Reference quantities at
piece counting
10, 25, 50, 100
Weighing Units
ct, dwt, g, gn, mg, mo, oz, ozt, t
Electric Supply
220V-240V, AC 50Hz
Operating temperature
+ 10° C …. + 30° C
Humidity of air
max. 80 % (not condensing)
Housing (B x D x H) mm
185 x 250 x 80
Dimensions of windshield
(B x D x H) mm
150 (inside)
160 (outside)
Weighing plate
(stainless steel)
Ø 80
Ø 135
Weight kg (net)
2,5 kg
Interface
RS 232C
PLE-N-BA-e-1222
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
D
Konformitätserklärung
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
GB
Declaration of
conformity
We hereby declare that the product to which this declaration refers conforms
to the following standards.
CZ
Prohlášení o
shode
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
E
Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F
Déclaration de
conformité
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
I
Dichiarazione di
conformitá
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
NL
Conformiteitverklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P
Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL
Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie dotyczy,
jest zgodny z poniższymi normami.
RUS
Заявление о
соответствии
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
Mark applied
EU Directive
Standards
2004/108/EC
EN 61326-1 (2006)
EN 61000-3-2 (2006)
EN 61000-3-3 (1995) + A1 (2001) + A2 (2005)
2006/95/EC
EN 61010-1 (2001)
Date: 01.02.2011
Signature:
KERN & Sohn GmbH
Management
KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
Declaration of conformity
EC-Konformitätserklärung EC-Declaration of -Conformity
EC- Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
Electronic Balance: PLE-N
PLE-N-BA-e-1222 5
6
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.
PLE-N-BA-e-1222
4 Basic Safety Precautions
Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN
balances.
Keep all parts of the original packaging for a possibly required
return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Reattach possibly supplied transport securing devices.
Secure all parts such as the glass wind screen, the weighing
platform, power unit etc. against shifting and damage.
4.1 Pay attention to the instructions in the Operation Manual
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 Transportation & 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 / return transport
PLE-N-BA-e-1222 7
8
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
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, vapors and dust;
Do not expose the device to extreme dampness for longer periods of time.
Non-permitted condensation (condensation of air humidity on the appliance)
may occur if a cold appliance is taken to a considerably warmer environment.
In this case, acclimatize the disconnected appliance for ca. 2 hours at room
temperature.
Avoid static charge of goods to be weighed or weighing container.
Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. Change location or remove
source of interference.
6.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
6.2.1 Placing
6.2.2 Scope of delivery / serial accessories
Balance, Weighing plate
Mains power supply
Windshield
Operating Manual
PLE-N-BA-e-1222
6.3 Appliance overview
1. Weighing plate
2. RS232C interface
3. Foot screws
4. Mains adapter
connection
PLE-N-BA-e-1222 9
10
6.4 Controls
Key
Designation
Short key pressing
longtime pressed button
until the acoustic signal
gets mute
MENU button/
Call-up application
menu
Select menu items –
scroll forward
Call-up user menu
Exit user menu
Switch-over display
Arrow button
numerical input – scroll backward
ON/OFF switch
Turn on/off
Exit user menu
CAL button/
Adjustment
Select menu items – scroll backward
Arrow button
Numerical input – scroll forward
PRINT button
Calculate weighing data via interface
Confirm / store settings
Arrow button
Numerical input – cipher selection
0
TARE
TARE button
Taring
Zeroing
6.4.1 Overview of display
6.4.2 Keyboard overview
PLE-N-BA-e-1222
6.5 Connect and switch-on power supply
For verified balances a warming-up time of 30 minutes must be
observed.
After connecting the mains adapter a countdown starts.
Battery charge sufficient
Battery very low. Connect mains adapter as soon as possible
to load the rechargeable battery.
Voltage has dropped below prescribed minimum. Connect
mains adapter to load the rechargeable battery.
.
Before connecting the mains adapter check if the printed voltage value is the same
as the local supply voltage. Only use KERN original mains adapter. Using other
makes requires consent by KERN.
Plug-in mains adapter in mains adapter bushing of the balance and connect to
the mains.
The balance will carry out a self-test Then the balance is set into stand-by mode.
Press the ON/OFF key. When the zero display appears, the balance is ready for
operation. When weighing with internal adjustment weight, adjustment first
occurs automatically. During this process, „CAL“ will appear on the display.
Press the ON/OFF key anew. The balance is now in stand-by mode
6.6 Rechargeable battery operation (option)
The rechargeable battery is charged via the delivered power supply.
The operating time of the rechargeable battery is about 30h; charging time until
complete recharging ca. 10h.
In the menu you can activate the AUTO-OFF function time off], see chp. 9.8.
According to menu settings, the balance switches automatically off in order to spare
the battery.
When the balance is in battery mode the following symbols appear on the display:
PLE-N-BA-e-1222 11
12
6.7 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.
6.8 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.
6.8.1 Stability display
If the display shows the stability display [] the balance is in a stable status. If the
status is instable the [] display disappears.
6.8.2 Balance zero display
If an exact zero reading is not displayed on the balance in spite of the weighing dish
being empty, press the TARE button and the balance will start resetting to zero [ O ]
.
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.
Observe stable environmental conditions. A warming up time (see chapter 1)
is required for stabilization.
Ensure that there are no objects on the weighing plate.
PLE-N-BA-e-1222
Ensure that there are no objects on the weighing plate. Press the CAL key
Wait until the weighed value for the required adjustment weight appears
flashing.
During the flashing display put the required adjustment weight carefully in the
center of the weighing plate.
The flashing display disappears.
After successful adjustment the balance automatically returns to weighing
mode.
Take away adjustment weight
7.1.1 Adjustment with recommended adjustment weight (factory setting)
Weight value of the required adjustment weight see chpt. 1 “Technical
specifications“:
PLE-N-BA-e-1222 13
14
7.1.2 Adjustment with weights of other nominal values
Ensure that there are no objects on the weighing plate. Press the CAL button
and keep it pressed until the acoustic signal gets mute.
Wait until „load“ appears.
During the flashing display put the adjustment weight carefully in the center of
the weighing plate.
The flashing display disappears.
After successful adjustment the balance automatically returns to weighing
mode.
Take away adjustment weight
An error message will be displayed in the event of an adjustment error or
incorrect adjustment weight. Wait until the balance is again in weighing
mode and repeat the adjustment procedure.
Weights of different nominal values may be used for adjustment but are not optimal
for technical measuring, possible adjustment points see table 1.
Info about adjustment weights can be found on the Internet at: http://www.kernsohn.com
PLE-N-BA-e-1222
Start-up
In stand-by mode press ON/OFF button.
The balance is ready for weighing when the weight display
appears.
Switching Off
Press ON/OFF button, the balance returns to the stand-by
mode.
Simple weighing
Place goods to be weighed on balance
Wait until the stability display appears []
Read weighing result.
Taring
Place the weighing box and press the TARE button.
„0-t“ is displayed.
After standstill control the zero display appears.
The weight of the container is now internally saved.
Weigh the material, the net weight will be indicated.
The weight of the weighing container will be displayed as a
minus number after removing the weighing container.
The tare weight is saved until it is deleted. Remove the load
from the balance and press the TARE button. „0-t“ is
displayed, wait until the zero display appears.
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.
.
8 Basic Operation
PLE-N-BA-e-1222 15
16
9 User menu
Navigation in the menu
Access to menu
In weighing mode press the MENU button and keep it pressed
until the acoustic signal gets mute. The first menu item „units“
is displayed.
How to select
menu items
Using the MENU button the individual menu items can be
selected one after the other.
Scroll forward using MENU button
Scroll backward using CAL button
Change settings
Acknowledge selected menu item using PRINT button, the
current setting is displayed. Each time the arrow buttons
are pressed the next setting will be displayed.
Scroll forward using MENU button
Scroll backward using CAL button
Save settings
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings
in the menu or go back to menu mode as follows.
Exit menu/
back to
weighing mode
Press the MENU button and keep it pressed until the acoustic
signal gets mute. The balance returns automatically into
weighing mode.
The settings of the balance can be changed in the user menu. This way, the balance
can be adjusted to individual weighing requirements.
By the factory the user menu has been set in a way that normally no more changes
must be made, only at special conditions of use.
PLE-N-BA-e-1222
Menu overview
Menu item
Display
Selection
Description
Weighing unit
(see chap. 9.1)
Units
Gram
Gramm
Carat
Carat
Ounce
Unze
Pound
Pound
PEnn
Pennyweight
OuncEtr
Troy Unze
GrAin
Grain
tAEL Hon
Tael Hongkong
tAEL SGP
Tael Singapore
tAEL roc
Tael R.O.C.
Momme
Momme
Data output type
(see chap. 9.2)
PC-Prtr
PC cont
Continuous output
PC CMd
Manual issue after pressing the
PRINT button
Print
not documented
Baudrate
(see chap. 9.3)
baud rt
br 1200
br 2400
br 4800
br 9600
Auto zero
(see chap. 9.4)
Auto 0
Au0 OFF
Auto Zero switched off
Au0 1
Auto Zero range ± ½ digit
Au0 2
Auto Zero range ± 3 digits
Au0 3
Auto Zero range ± 7 digits
Au0 3E
Auto Zero range ± 7 digits in the
whole weighing range
Filter
(see chap. 9.5)
Filter
Filt 1
Setting for dispensing
Filt 2
Sensitive and fast, very quiet
set-up location
Filt 3
Robust but slow, busy set-up
locatio
Standstill control display
(see chap. 9.6)
Stabil
Stab 1
Standstill control fast – very
quiet set-up location
Stab 2
Standstill control fast + exact –
quiet set-up location
Stab 3
Standstill control exact – very
set-up location
PLE-N-BA-e-1222 17
18
Backlight (see chap. 9.7)
Blt
on
Backlight on
off
Backlight off
Auto
Backlight automatically switched
off 3 seconds after achieving
stable weighing value. Changes
in weight or pressing of keys will
automatically result in backlight
switching on again.
AUTO OFF
in stand-by mode
(see chap. 9.8)
time off
disab
AUTO-OFF off
2 Min
AUTO-OFF after 2 minutes
without changing the weight
5 Min
AUTO-OFF after 5 minutes
without changing the weight
15 Min
AUTO-OFF after 15 minutes
without changing the weight
Adjustment
(see chap. 7)
Calib
E-Cal
Adjustment with external weight,
locked for verifiable units
End
PLE-N-BA-e-1222
9.1 Weighing unit
In weighing mode press the MENU button and keep it pressed until the acoustic
signal gets mute. The first menu item „units“ is displayed.
Acknowledge using PRINT button, the current setting is displayed.
Press the arrow keys to select desired setting.
Scroll forward using MENU button
Scroll backward using CAL button
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings in the menu or go
back to weighing mode as follows.
Press the MENU button and keep it pressed until the acoustic signal gets mute.
The balance returns automatically into weighing mode.
Symbol
Weighing unit
Conversion
factor 1g =
Gram
GRAMS
1.
Carat
CARATS
5.
Ounce
OUNCE
0.035273962
Pound
POUNDS
0.0022046226
PEnn
PENNYWEIGHTS
0.643014931
OuncEtr
OUNCE TROY
0.032150747
GrAin
GRAIN
15.43235835
tAEL Hon
HONG KONG TAEL
0.02671725
tAEL SGP
SYNGAPORE TAEL
0.02646063
tAEL roc
R.O.C. TAEL
0.02666666
Momme
MOMME
0.2667
According to requirements the balance can be switched-over into different units (in
verified balances not all the units are available, see chap. 1 „Technical
specifications). Selected weighing unit will be retained even after disconnection from
the mains.
PLE-N-BA-e-1222 19
20
9.2 Data output type
In weighing mode press the MENU button and keep it pressed until the acoustic
signal gets mute.
Press MENU button
Acknowledge using PRINT button, the current setting is displayed.
Press the arrow keys to select desired setting.
Scroll forward using MENU button
Scroll backward using CAL button
„PC cont“
= Continuous output
„PC CMd“
= Manual issue after pressing the PRINT button
„Print“
= not documented
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings in the menu or go
back to weighing mode as follows.
Press the MENU button and keep it pressed until the acoustic signal gets mute.
The balance returns automatically into weighing mode.
PLE-N-BA-e-1222
9.3 Baud rate
In weighing mode press the MENU button and keep it pressed until the acoustic
signal gets mute.
Press MENU button repeatedly
Acknowledge using PRINT button, the current setting is displayed.
Press the arrow keys to select desired setting.
Scroll forward using MENU button
Scroll backward using CAL button
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings in the menu or go
back to weighing mode as follows.
Press the MENU button and keep it pressed until the acoustic signal gets mute.
The balance returns automatically into weighing mode.
PLE-N-BA-e-1222 21
22
9.4 Auto Zero
In weighing mode press the MENU button and keep it pressed until the acoustic
signal gets mute.
Press MENU button repeatedly
Acknowledge using PRINT button, the current setting is displayed.
Under this menu item the automatic zero point correction can be switched on or off.
In switched-on-state the zero point is automatically corrected at drift or when dirty.
Information:
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.
PLE-N-BA-e-1222
Press the arrow keys to select desired setting.
Scroll forward using MENU button
Scroll backward using CAL button
Au0 OFF = Auto Zero switched off
Au0 1 = Auto Zero range ± ½ digit
Au0 2 = Auto Zero range ± 3 digits
Au0 3 = Auto Zero range ± 7 digits
Au0 3E = Auto Zero range ± 7 digits in the whole weighing range
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings in the menu or go
back to weighing mode as follows.
Press the MENU button and keep it pressed until the acoustic signal gets mute.
The balance returns automatically into weighing mode.
PLE-N-BA-e-1222 23
24
9.5 Filter
In weighing mode press the MENU button and keep it pressed until the acoustic
signal gets mute.
Press MENU button repeatedly
Acknowledge using PRINT button, the current setting is displayed.
Press the arrow keys to select desired setting.
Scroll forward using MENU button
Scroll backward using CAL button
FILTER 1: Setting for dispensing
FILTER 2: Sensitive and fast, very quiet set-up location.
FILTER 3: Robust but slow, busy set-up location.
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings in the menu or go
back to weighing mode as follows.
Press the MENU button and keep it pressed until the acoustic signal gets mute.
The balance returns automatically into weighing mode.
This menu item allows the balance to be set according to specific ambient conditions
and measuring purposes.
PLE-N-BA-e-1222
9.6 Standstill control display
In weighing mode press the MENU button and keep it pressed until the acoustic
signal gets mute.
Press MENU button repeatedly
Acknowledge using PRINT button, the current setting is displayed.
Press the arrow keys to select desired setting.
Scroll forward using MENU button
Scroll backward using CAL button
STAB 1: Standstill control fast – very quiet set-up location
STAB 2: Standstill control fast + exact – quiet set-up location
STAB 3: Standstill control exact – very set-up location.
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings in the menu or go
back to weighing mode as follows.
Press the MENU button and keep it pressed until the acoustic signal gets mute.
The balance returns automatically into weighing mode.
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9.7 Display background illumination
In weighing mode press the MENU button and keep it pressed until the acoustic
signal gets mute.
Press MENU button repeatedly
Acknowledge using PRINT button, the current setting is displayed.
Press the arrow keys to select desired setting.
Scroll forward using MENU button
Scroll backward using CAL button
ON
Background illumination on
OFF
Background illumination off
Auto
Backlighting automatically switched off 3 seconds after achieving stable
weighing value. Changes in weight or pressing of keys will automatically
result in backlight switching on again.
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings in the menu or go
back to weighing mode as follows.
Press the MENU button and keep it pressed until the acoustic signal gets mute.
The balance returns automatically into weighing mode.
PLE-N-BA-e-1222
9.8 Automatic switch-off function „AUTO OFF“
In weighing mode press the MENU button and keep it pressed until the acoustic
signal gets mute.
Press MENU button repeatedly
Acknowledge using PRINT button, the current setting is displayed.
Press the arrow keys to select desired setting.
Scroll forward using MENU button
Scroll backward using CAL button
disab = AUTO-OFF switched off
2 Min = AUTO-OFF after 2 minutes without changing the weight
5 Min = AUTO-OFF after 5 minutes without changing the weight
15 Min = AUTO-OFF after 15 minutes without changing the weight
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings in the menu or go
back to weighing mode as follows.
Press the MENU button and keep it pressed until the acoustic signal gets mute.
The balance returns automatically into weighing mode.
in stand-by mode
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10 User menu
Count
Parts counting
Dens
Density determination of solids/liquids
HoL
Checkweighing
Perc
Percent determination
M Load
Peak value function
End
Navigation in the menu
Access to menu
In weighing mode press MENU button. The first menu item
„count“ is displayed.
How to select
menu items
Using the MENU button the individual menu items can be
selected one after the other.
Scroll forward using MENU button
Scroll backward using CAL button
Change settings
Acknowledge selected menu item using PRINT button, the
current setting is displayed. Each time the arrow buttons
are pressed the next setting will be displayed.
Scroll forward using MENU button
Scroll backward using CAL button
Save settings
Take over selection using the PRINT button.
Weighing balance returns to menu. Either make more settings
in the menu or go back to menu mode as follows.
Exit menu/
back to
weighing mode
Press the MENU button and keep it pressed until the acoustic
signal gets mute. The balance returns automatically into
weighing mode.
The following operating modes may be enabled/disabled in the user menu:
PLE-N-BA-e-1222
10.1 Parts counting
In weighing mode press MENU button. The first menu item „count“ is displayed.
Acknowledge using PRINT button, the current reference quantity is displayed.
Using the arrow buttons select reference quantity (10, 25, 50, 100 or
manual = numerical input of the reference weight, see chap. 10.1.3).
Scroll forward using MENU button
Scroll backward using CAL button
If using a weighing container, put this before pressing the PRINT button. The
taring process is automatically started. „0-t“ is displayed.
Confirm selected reference number of items by pressing the PRINT button.
Place as many pieces to add-up as required by the set reference piece number.
Acknowledge using PRINT button and wait for standstill control.
After successful reference determination the current quantity is displayed.
Remove reference weight. The balance is now in parts counting mode counting
all units on the weighing plate.
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.
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If it was impossible to determine a reference due to instable goods to be
weighed or an insufficient reference weight, the following display will
appear during reference calculation.
ERR04 = smallest counting weight not achieved
Add SMP=if the placed quantity for a correct reference determination
is too small, more parts must be placed as follows.
Place more parts, but at least the double quantity.
Press the PRINT button, the reference weight is calculated anew.
The placed quantity is always too
small, add more parts and
acknowledge using the PRINT
button. Repeat the procedure until
the piece counter display appears.
Placed quantity sufficient for
reference determination.
Remove reference weight. The
balance is now in parts counting
mode counting all units on the
weighing plate.
Return to weighing mode
Press the ON/OFF key.
PLE-N-BA-e-1222
10.1.1 Switching over between quantity and weight display
The automatic reference optimisation is not active when the reference
weight is entered numerically.
Place load on pan and read the number of pieces.
Press MENU button, the total weight of the placed parts is displayed.
or
Press the MENU button and keep it pressed until the acoustic signal gets mute,
the average weight of a single piece is displayed.
Back to quantity display press MENU button again.
10.1.2 Automatic reference optimization
In order to improve the counting exactness, the reference can be optimised by
adding more pieces. At every reference optimisation, the reference weight is
calculated anew. As the additional pieces increase the base for the calculation, the
reference also becomes more exact.
Leave the piece number on the weighing plate after setting the reference weight
Duplicate the number of pieces on the weighing plate and wait until the acoustic
signal sounds. The reference weight is calculated anew.
Either repeat the reference optimisation by adding more pieces (max. 255
pieces) or start the counting process.
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10.1.3 Numeric entering of the reference weight
In weighing mode press MENU button. The first menu item „count“ is displayed.
Acknowledge using PRINT button, the current reference quantity is displayed.
Press the arrow buttons to select the parameters manually.
Press the arrow buttons to enter the known reference weight.
If using a weighing container, put this before pressing the PRINT button.
The taring process is automatically started. „0-t“ is displayed.
Place load on pan and read the number of pieces.
Press MENU button, the total weight of the placed parts is displayed.
Back to quantity display press MENU button again.
Return to weighing mode
Press the ON/OFF key
If you know the reference weight/piece you can enter this via the numeric keyboard.
PLE-N-BA-e-1222
10.2 Density determination (Hydrostatic weighing)
In weighing mode press MENU button. The first menu item „count“ is displayed.
Press MENU button
Acknowledge using PRINT button, the current setting is displayed.
Using MENU button select „d SoLid“
Confirm by pressing the PRINT button.
Use the arrow buttons to enter density of the measuring fluid.
Confirm input by pressing the PRINT button.
Density is the relationship of weight [g] : volume [cm3]. The weight is determined by
weighing the sample in air. The volume results from the ascending force [g] of the
sample dipped in a liquid. The density [g/cm3] of that liquid is known (principle of
Archimedes).
The density is determined with help of the underfloor weighing device.
10.2.1 Density determination of solids
Prepare the balance as follows:
Switch off the balance
Remove the weighing pan and carefully turn over the weighing balance.
Screw-in hook for underfloor weighing (option)
Place weighing balance over an opening
Hook-in the sample support
Fill measuring liquid in a vessel e.g. beaker) and temper it.
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The display for weight determination of the "sample in air“ appears.
Confirm by pressing the PRINT button.
If necessary, tare and put the sample.
Wait until the weight display of the weighing balance has become stable and
then press the PRINT button. „WEI AIR“ appears flashing.
The display for weight determination of the "sample in the measuring fluid“
appears.
Immerse sample holder and tare by pressing the TARE-key
Place sample and immerse it
Make sure that the sample holder does not touch the beaker.
Wait until the weight display of the weighing balance has become stable and
then press the PRINT button. „WEI LIQ“ appears flashing.
The density of the sample is shown
Return to weighing mode
Press the ON/OFF key
or use the MENU button to start a new measuring cycle.
If at the density determination errors have appeared, „d-----„ is displayed.
PLE-N-BA-e-1222
10.2.2 Determining density of liquids
In weighing mode press MENU button. The first menu item „count“ is displayed.
Press MENU button
Acknowledge using PRINT button, the current setting is displayed.
Using MENU button select „d Liquid“
Confirm by pressing the PRINT button.
Use the arrow buttons to enter density of the glass sinker.
Confirm input by pressing the PRINT button.
Fill sample liquid into a vessel, e.g. a pitcher.
Heat sample liquid until temperature is constant.
Prepare a glass sinker with known density
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The display for weight determination of the "glass sinker in air“ appears.
Confirm by pressing the PRINT button.
Tare if necessary and hook on the glass sinker centrically.
Wait until the weight display of the weighing balance has become stable and
then press the PRINT button. „WEI AIR“ appears flashing.
The display for weight determination of the "glass sinker in sample liquid“
appears.
Tare if necessary and immerse the sinker into the measuring fluid
Wait until the weight display of the weighing balance has become stable and
then press the PRINT button. „WEI LIQ“ appears flashing.
The density of the sample fluid is shown
Return to weighing mode
Press the ON/OFF key
or use the MENU button to start a new measuring cycle.
If at the density determination errors have appeared, „d-----„ is displayed.
PLE-N-BA-e-1222
10.3 Checkweighing
Goods to be weighed below tolerance limit
Goods to be weighed within tolerance range
Goods to be weighed above tolerance limit
In weighing mode press MENU button. The first menu item „count“ is displayed.
Press MENU button repeatedly
Confirm using the PRINT button, the display to enter the lower tolerance limit
appears.
Enter the lower limit value using the arrow buttons
Confirm using the PRINT button, the display to enter the upper tolerance limit
appears.
Enter the upper limit value using the arrow buttons
Confirm using the PRINT button, the display to adjust the signal tone appears.
An upper and a lower limit value can be established to ensure that the weighed
goods are exactly within the established tolerance limits.
The display [L], [ok] or [H] shows whether the goods to be weighed are within the
two tolerance limits.
The indetermination if the goods to be weighed are within the tolerance limits, can
additionally be given by an acoustic signal.
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Select the desired settings by pressing the MENU button
Beep off
Signal tone switched off
Beep on
Signal tone on, if weighed goods are within tolerance range
Confirm by pressing the PRINT button.
The balance is now in checkweighing mode.
Put on goods to be weighed, tolerance control is started
Return to weighing mode
Press the ON/OFF key
PLE-N-BA-e-1222
10.4 Percent determination
In weighing mode press MENU button. The first menu item „count“ is displayed.
Press MENU button repeatedly
Acknowledge using PRINT button, the current setting is displayed.
Using MENU button select „PErc A“
If using a weighing container, put this before pressing the PRINT button. The
taring process is automatically started. „0-t“ is displayed.
Put on reference weight (=100 %)
Wait until the weight display of the balance has become stable and then press
the PRINT button. The weight is adopted as reference (100%).
Remove reference weight. From now the balance is in percent determining
mode.
Place goods to be weighed on balance.
The weight of the sample is displayed in percentage in terms of the reference
weight.
Percent determination allows weight display in percent, in relation to a reference
weight.
10.4.1 Entering the reference weight by weighing
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10.4.2 Numeric entering of the reference weight
In weighing mode press MENU button. The first menu item „count“ is displayed.
Press MENU button repeatedly
Acknowledge using PRINT button, the current setting is displayed.
Using MENU button select „PErc n“
Confirm using the PRINT button, the display to enter the reference weight
appears.
Press the arrow buttons to enter the reference weight (100%).
Confirm input by pressing the PRINT button. From now the balance is in percent
determining mode.
Place goods to be weighed on balance.
The weight of the sample is displayed in percentage in terms of the reference
weight.
Return to weighing mode
Press the ON/OFF key
PLE-N-BA-e-1222
10.5 Peak value function
In weighing mode press MENU button. The first menu item „count“ is displayed.
Press MENU button repeatedly
Confirm using PRINT button, the taring process is automatically started. „0-t“ is
displayed.
From here the balance is in peak value mode, where a „M” pops up.
Load weighing plate. The maximum load value is displayed.
The peak value remains in the display until the TARE button is pressed. Then
the balance is ready for further measurements.
Return to weighing mode
Press the ON/OFF key
This function displays the highest load value (peak value) of a weighing.
The peak value remains in the display until it will be deleted.
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11 Data output RS 232C
9
8
7
6
5
4
3
2
1
Pin 2: Tx Signal
Pin 3: Rx Signal
Pin 5: Gnd
RS232C
11.1 Technical Data
8-bit ASCII Code
8 data bits, 1 stop bit, no parity bit
Baud rate optional from 1200 - 9600 Baud
For operation with interface faultless operation is only ensured with the correct
KERN – interface cable (max. 2m)
11.2 Pin allocation of balance output plug
PLE-N-BA-e-1222
11.3 Interface
1. Character
sign -/ blank (weighing value)
2-9. Character
weight or other data
10-12. Character
weighing unit
13. Character
stability display
14. Character
carriage return
15. Character
line feed
Balance
PC
3
2
7
2
3
5
Balance
PC
2
3
5
2
3
5
Data input
GND
2
5
Balance
Printer
Balance – PC 25-pole
Balance – PC 9-pole
Balance - printer
11.4 Data transfer
The data set consists of the following 14 characters:
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11.5 Format for data transmission
1°
2°
3°
4°
5°
6°
7°
8°
9°
10°
11°
12°
13°
14°
15°r
Character
Weight
Weighing unit
Stability
CR
LF
1°
2°
3°
4°
5°
6°
7°
8°
9°
10°
11°
12°
13°
14°
15°
16°
17°
d
=
Density
Blank
Weighing unit
CR
LF
1°.
2°
3°
4°
5°
6°
7°
8°
9°
10°
11°
12°
13°
14°
15°
16°
Pcs : Blank
Quantity
1°.
2°
3°
4°
5°
6°
7°
8°
9°
10°
11°
12°
13°
14°
15°
16°
17°
18°
19°
20°
Weight
:
space
Measuring Value
space g
space S
1°.
2°
3°
4°
5°
6°
7°
8°
9°
10°
11°
12°
13°
14°
15°
16°
17°
18°
PMU
average piece
weight
:
Blank
Measuring Value
space g
At stable weight the format is transferred after pressing the PRINT button.
Weighing mode (continuous output and remote control command)
Density determination (only remote control command)
Counting (only remote control command)
Number of pieces
Weight of placed pieces
Average parts weight
PLE-N-BA-e-1222
11.6 Remote control instructions
Instruction:
Function
“T” = H54
Taring
“C” = H43
Adjustment
“E” = H45
Enter
“M” = H4D
Menu
“O” = H4F
ON/OFF
11.7 Printer mode
The following conditions must be met to provide successful communication between
the weighing balance and the printer.
Use a suitable cable to connect the weighing balance to the interface of the
printer. Faultless operation requires an adequate KERN interface cable.
The Baud rates of balance and printer must agree, see chap. 9.3.
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Printout examples:
Weighing mode/peak value function
Density determination
d
Measuring value „Density“
Parts counting
PCS
Number of pieces
Weight
Weight of placed pieces
PMU
Average parts weight
Percent determination
Perc
Display value in [%]
Weight
Display value in [g]
Perc. 20 %
Weight: 30.000 g
d= 2.80066 g/cm3d
………. 22.000 g
Pcs 100
Weight: 300.000 g
PMU: 3.000 g
PLE-N-BA-e-1222
12 Error messages
ERR01
Weight value instable or zeroing not possible. Check the
environmental conditions.
ERR02
Adjustment error, e.g. environmental conditions instable
ERR03
Adjustment error e.g. incorrect adjustment weight}
ERR04
Piece weight too small/instable
ERR05
Data transfer not possible, as weighing value is instable. Check
the environmental conditions.
ERR06
Weighing value in density determining mode instable.
Check the environmental conditions.
“UNLOAD”:
Weighing range not achieved.
Check position of the weighing plate
“CAL But”
Adjust balance
Weighing range exceeded, placed load exceeds the capacity of
the balance. Unload the balance.
Weighing range not reached, e.g. weighing plate not in place
13 Service, maintenance, disposal
13.1 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.
13.2 Service, maintenance
The appliance may only be opened by trained service technicians who are
authorized by KERN.
Before opening, disconnect from power supply.
13.3 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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14 Instant 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.
(Rechargeable) batteries are inserted incorrectly or
empty
No (rechargeable) batteries inserted.
The displayed weight is
permanently changing
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 weighing result is
obviously incorrect
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)
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:
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
PLE-N-BA-e-1222
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