KERN PLT User manual

GB KERN PLT
Version 1.0 12/2005
Operating Manual
Electronic Precision Balance
Contents
1Technical data_________________________________________________ 72
2Declaration of conformity _______________________________________ 74
3Appliance overview ____________________________________________ 76
4Basic Information (General)______________________________________ 77
4.1 Proper use______________________________________________________ 77
4.2 Improper Use ___________________________________________________ 77
4.3 Warranty _______________________________________________________ 77
4.4 Monitoring of Test Resources______________________________________ 78
5Basic Safety Precautions________________________________________ 78
5.1 Pay attention to the instructions in the Operation Manual_______________ 78
5.2 Personnel training _______________________________________________ 78
6Transport and storage __________________________________________ 78
6.1 Testing upon acceptance _________________________________________ 78
6.2 Packaging ______________________________________________________ 78
7Unpacking, Setup and Commissioning ____________________________ 79
7.1 Installation Site, Location of Use ___________________________________ 79
7.2 Unpacking ______________________________________________________ 79
7.2.1 Setup ______________________________________________________________ 80
7.2.2 Scope of delivery _____________________________________________________ 80
7.3 Mains connection ________________________________________________ 80
7.4 Connection of peripheral devices___________________________________ 80
7.5 Initial Commissioning ____________________________________________ 80

PLT-BA-defsi-0510 71
8User menu ____________________________________________________ 81
8.1 User principle of the menu control__________________________________ 84
8.2 Operation of the balance with PS/2-keyboard _________________________ 85
8.3 Menu selection __________________________________________________ 86
8.3.1 P1 Calibration (adjustment) _____________________________________________ 86
8.3.2 P2 GLP (Good laboratory practice) _______________________________________ 90
8.3.3 P3 Date/time_________________________________________________________ 92
8.3.4 P4 Readout__________________________________________________________ 94
8.3.5 P5 RS-232 __________________________________________________________ 97
8.3.6 P6 Printouts _________________________________________________________ 99
8.3.7 P7 Units ___________________________________________________________ 104
8.3.8 P8 Operating modes__________________________________________________ 104
8.3.9 P9 Global functions __________________________________________________ 105
9Operation____________________________________________________ 106
9.1 Operating modes (P8) ___________________________________________ 108
9.1.1 Simple weighing _____________________________________________________ 110
9.1.2 Counting ___________________________________________________________ 112
9.1.3 Checkweighing (weighing with tolerance range) ____________________________ 120
9.1.4 Filling _____________________________________________________________ 122
9.1.5 Percent weighing ____________________________________________________ 123
9.1.6 Animal weighing (dynamic weighing) _____________________________________ 125
9.1.7 Density determination_________________________________________________ 127
9.1.8 Formulation_________________________________________________________ 128
9.1.9 Statistics: __________________________________________________________ 132
10 Data output ________________________________________________ 135
10.1 Technical data__________________________________________________ 135
10.2 Pin allocation of the balance output plug (front view) _________________ 135
10.3 Remote control instructions ______________________________________ 136
11 Service, maintenance, disposal________________________________ 137
11.1 Cleaning ______________________________________________________ 137
11.2 Service, maintenance____________________________________________ 137
11.3 Disposal_______________________________________________________ 137
12 Instant help ________________________________________________ 138

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1 Technical data
KERN PLT 450-3M PLT 650-3M PLT 2000-3DM
Readability (d) 0.001 g 0.001 g 0.001/0.01 g
Weighing range (max) 450 g 650 g 200/2,000 g
Minimum load 0.02 g 0.02 g 0.02 g
Verification value 0.01 g 0.01 g 0.01/0.1 g
Verification class II II II
Reproducibility 0.002 g 0.002 g 0.002/0.02 g
Linearity ± 0.002 g ± 0.002 g ± 0.002/0.02 g
Stabilization time 4 sec.
Adjustment weight internal
Weighing Units mg, g, ct
Minimum piece weight for
counting function > 1 mg
Reference quantities at
piece counting 10, 20, 50,100, freely selectable
Weighing plate, stainless
steel 128 x 128 mm
Dimensions of the housing
(B x D x H) 206 x 330 x 160 (with wind screen)
Dimensions
Glass wind screen [mm] 150 x 150 x 80
(Weighing room 140 x140 x 65)
Net weight (kg) 5,5
Permitted environmental
condition -15° C to 30° C
Humidity of air max. 80 % relative (not condensing)
Voltage 230 V/50Hz

PLT-BA-defsi-0510 73
KERN PLT 2500-2M PLT 4500-2M
Readability (d) 0.01 g 0.01 g
Weighing range (max) 2,500 g 4,500 g
Minimum load 0.5 g 0.5 g
Verification value 0.1 g 0.1 g
Verification class II II
Reproducibility 0.02 g 0.02 g
Linearity ± 0.02 g ± 0.02 g
Stabilization time 4 sec.
Adjustment weight internal
Weighing Units mg, g, ct
Minimum piece weight for
counting function > 10 mg
Reference quantities at
piece counting 10, 20, 50,100, freely selectable
Weighing plate, stainless
steel 165 x 165 mm
Dimensions of the housing
(B x D x H) 206 x 330 x 80 (without windscreen)
Net weight (kg) 5,7
Permitted environmental
condition -15° C to 30° C
Humidity of air max. 80 % relative (not condensing)
Voltage 230 V/50Hz

PLT-BA-defsi-0510
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2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: [email protected]
Tel: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Konformitätserklärung
Declaration of conformity for apparatus with CE mark
Konformitätserklärung für Geräte mit CE-Zeichen
Déclaration de conformité pour appareils portant la marque CE
Declaración de conformidad para aparatos con marca CE
Dichiarazione di conformitá per apparecchi contrassegnati con la marcatura CE
English We hereby declare that the product to which this declaration refers conforms with the fol-
lowing standards.
Deutsch Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den nach-
stehenden Normen übereinstimmt.
Français Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Español Manifestamos en la presente que el producto al que se refiere esta declaración est´´a de
acuerdo con las normas siguientes
Italiano Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è confor-
me alle norme di seguito citate.
Electronic Balance: KERN PLT
Mark applied EU Directive Standards
89/336/EEC EMC
EN45501
EN55022
73/23/EEC Low Voltage EN60950
Date: 22.12.2005 Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149

PLT-BA-defsi-0510 75
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: [email protected]
Tel: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Konformitätserklärung
Declaration of conformity for apparatus with CE mark
Konformitätserklärung für Geräte mit CE-Zeichen
Déclaration de conformité pour appareils portant la marque CE
Declaración de conformidad para aparatos con marca CE
Dichiarazione di conformitá per apparecchi contrassegnati con la marcatura CE
English We hereby declare that the product to which this declaration refers conforms with the fol-
lowing standards.
This declaration is only valid with the certificate of conformity by a notified body.
Deutsch Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den nach-
stehenden Normen übereinstimmt.
Diese Erklärung gilt nur in Verbindung mit der Konformitätsbescheinigung einer
benannten Stelle.
Français Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Cette déclaration est valide seulement avec un certificat de conformité d’un orga-
nisme notifié.
Español Manifestamos en la presente que el producto al que se refiere esta declaración está de
acuerdo con las normas siguientes.
Esta declaración solo será válida acompañada del certificado de conformidad de
conformidad de la parte nominal.
Italiano Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è confor-
me alle norme di seguito citate.
Questa dichiarazione sarà valida solo se accompagnata dal certificato di conformità
della parte nominale.
Model: KERN PLT
EU Directive Standards EC-type-approval certificate no. Issued by
90/384/EEC EN 45501 T6843 NMI
90/384/EEC EN 45501 TCM 128/05-4315 (KERN PLT 2000-3DM) CMI
Date: 22.12.2005 Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. [phone],Fax [phone]

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3 Appliance overview
Mod.: PLT 450-3M, PLT 650-3M, Mod.: PLT 2500-2M, PLT 4500-2M
PLT 2000-3DM with glass windshield
1. Mains connection
2. PS/2 keyboard
3. RS 232 interface
Air bubble Underfloor weighing device

PLT-BA-defsi-0510 77
4 Basic Information (General)
4.1 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 mate-
rial 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.
4.2 Improper Use
Do not use balance for dynamic add-on weighing procedures, if small amounts of
goods to be weighed are removed or added. The “stability compensation“ installed in
the balance may result in displaying an incorrect measuring value! (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 dam-
age 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 weigh-
ing 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.
4.3 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 dammage or dammage by media, liquids, natural wear and tear
•The appliance is improperly set up or incorrectly electrically connected
•The measuring system is overloaded

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4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the bal-
ance and, if applicable, the testing weight, must be checked regularly. The responsi-
ble user must define a suitable interval as well as type and scope of this test. Infor-
mation 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.
5 Basic Safety Precautions
5.1 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.
5.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
6 Transport and storage
6.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the appli-
ance itself when unpacking for possible visible damage.
6.2 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.

PLT-BA-defsi-0510 79
7 Unpacking, Setup and Commissioning
7.1 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.
If electro-magnetic fields or static charge occur, or if the power supply is unstable
major deviations on the display (incorrect weighing results) are possible. In that case,
the location must be changed.
7.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.

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7.2.1 Setup
Level balance with foot screws until the air bubble of the water balance is in the pre-
scribed circle.
Models d = 10 mg Models d = 1 mg
7.2.2 Scope of delivery
Serial accessories:
•Balance
•Weighing plate
•Mains power supply
•Operating Manual
•Glass wind screen
7.3 Mains connection
Power is supplied via the external mains power supply. The stated voltage value
must be the same as the local voltage.
Only use original KERN mains power supplies. Using other makes requires consent
by KERN.
7.4 Connection of peripheral devices
Before connecting or disconnecting of additional devices (printer, PC) to the data in-
terface, 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.
7.5 Initial Commissioning
A warming up time of 15 minutes after switching on stabilizes the measuring values.
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.

PLT-BA-defsi-0510 81
8 User menu
The user menu has nine main menus (P1 - P9), arranged in the following sub-menus:
P1 Calibration
01 Internal Calibration * * * * * * * * Function
02 External Calibration * * * * * * * * Function
03 User Calibration * * * * * * * * Function
04 Calibration Test * * * * * * * * Function
05 Weight corr. 0.0
06 Autom. Calibration 3 both
07 Autom. cal. time 3 3 hours
08 Print report 1 on
P2 GLP
01 User
02 Project
03 Print-out time 1 on
04 Print-out date 1 on
05 User print-out 1 on
06 Project print-out 1 on
07 Id print-out 1 on
08 Last cal. print 1 on
P3 Date/time
01 Date format 0 D/M/Y
02 Time format 0 24 hour
03 Time * * * * * * * * Function
04 Date * * * * * * * * Function
05 Time display 1 on
06 Date display 1 on
P4 Display
01 Filter 3 normal
02 Med. Filter 1 enabled
03 Disp. refresh 1 0.08 s
04 Autozero 1 on
05 Last digit 1 always
06 Negative 0 disabled

PLT-BA-defsi-0510
82
P5 RS-232
01 Baud rate 1 4800
02 Parity 0 non
03 Data bits 2 8 bit
04 Stop bits 1 1 bit
05 Handshake 0 none
06 Auto print 0 none
07 Intervall 1 * 0.1 s
08 Min. mass 4 10 d
09 Print on stab. 1 enabled
10 Printout to 1 computer
P6 Printouts
01 Printout no. 0 Standard
02 Printout 1 start 1
03 Printout 1 stop 1
04 Printout 2 start 1
05 Printout 2 stop 1
.. ………………….
10 Printout. edit. * * * * * * * * Function
11 string 1
12 string 2
.. ………………….
90 80. string
P7 Units
01 Gram 1 enabled
02 Milligram 0 disabled
03 Carat 0 disabled
04 Pound 0 disabled
05 Ounce 0 disabled
06 Ounce troy 0 disabled
07 Dwt 0 disabled
08 Teal Hk. 0 disabled
09 Teal S. 0 disabled
10 Teal T. 0 disabled
11 Momme 0 disabled
12 Grain 0 disabled
13 Newton 0 disabled
14 Tical 0 disabled
15 Custom 0 disabled
16 Custum Factor 0.1
P8 Modes
01 Parts Count 1 enabled
02 Checkweighing 1 enabled
03 Filling 1 enabled
04 Percent 1 enabled
05 Animal 1 enabled
06 Density 1 enabled
07 Formulation 1 enabled
08 Statistics 1 enabled

PLT-BA-defsi-0510 83
P9 Globals
01 ID setting * * * * * * * * Function
02 ID autoprint 0 off
03 Beep 1 on
04 Language * * * * * * * * Function
05 Backlight 1 on
06 Contrast * * * * * * * * Function
07 Screensaver 1 on
08 Temperature * * * * * * * * Function
09 Balance ID 141475
10 Software rev. MBA p. 32
11 Par. printout * * * * * * * * Function
12 Par. receive * * * * * * * * Function
13 Password prot. * * * * * * * * Function
Main menu:
1. Menu number (P1 - P9)
2. Menu designation
3. Cursor ( ►) indicates the current
menu item
Submenu:
1. Main menu number (P1 – P9)
2. Sub-menu number and designation
3. Parameter value or ****** i.e. this
menu item is stored as function
4. Description of function
5. Cursor ( ►) shows the current
menu item (e.g. P1).
6. Cursor ( ►) shows the current set-
ting (e.g. 06).
7. Status
8. Use the arrow key to modify the pa-
rameter value, the active parameter
blinks.

PLT-BA-defsi-0510
84
8.1 User principle of the menu control
In the menu the settings of the balance can be modified and functions can be acti-
vated.
This way, the balance can be adjusted to individual weighing requirements. Proceed
as follows:
ÖSwitch on the balance using the key
ÖAfter actuating the key the display shows the main menus that can be set
P1 Calibration
P2 GLP
P3 Date/Time
P4 Readout
P5 RS-232
P6 Printouts
P7 Units
P8 Modes
P9 Global
s
Setup2.02.05
ÖUse the cursor ( ►) to select your setting
Use the key to move the cursor ( ►) down, the key to move it up
ÖThe key confirms your selected setting, the display shows the sub-menu or the
active menu item blinks:
Setup
P1 01 Int. calibr.
02 Ext. calibr.
03 User calibr.
04 Calibr. test
05 Weight. corr.
06 Aut calibr.
07 Print report
o
Auto cal. time
08
********
********
********
********
0.0
0
1
function
function
function
off
on
function
31.01.05
11 hour
ÖUse the arrow keys to move within and enter into the menu:
•Access to main menu
•Access to submenu
•In the menu one menu
item to the right
•Selection of the number
to be changed to the
right (the respective ac-
tive
p
osition flashes
)
•Back to main menu
•Selection of the number
to be changed to the left
(the respective active
position flashes)
•Cursor control upwards
•Parameter selection within a function
•Increasing the value for selected numeral or number
•Cursor control downwards
•Parameter selection within a function
•Decreasin
g
the value for selected numeral or number

PLT-BA-defsi-0510 85
ÖActuating the key will confirm your setting; to interrupt use the key
ÖUse the key to return to the menu
ÖActuate key again, a message will inquire whether you want to save the
changes you made.
ÖActuating the key will save the selected setting.
ÖIf you do not want to save your selected setting, press the key
ÖThe balance returns automatically into weighing mode.
Weighing
0.0000
g
0% 100%
0
27.01.05
8.2 Operation of the balance with PS/2-keyboard
Using a PS/2 keyboard will help you to enter numbers and texts faster and easier.
Key allocation:
Balance keyboard
PS keyboard

PLT-BA-defsi-0510
86
8.3 Menu selection
8.3.1 P1 Calibration (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 re-
ceive accurate measuring values it is also recommended to adjust the balance peri-
odically in weighing operation.
Using the inbuilt adjusting weight the balance automatically carries out an adjustment
after any temperature change of 3 °C or any time it was disconnected from the power
supply.
Of course it is also possible to check the accuracy of the balance manually any time.
You can choose between two options:
1. Adjustment is started by pressing the F-key three times.
After successful adjustment the balance automatically returns to weighing
mode.
2. Under menu item “P1 01 Adjustment with internal weight” (see table below)
Procedure when adjusting:
Observe stable environmental conditions. A warming up time of ca. 1 hour is re-
quired for stabilization.
Note!
During the adjustment process no objects should be on the weighing plate.
Operation Display
ÖCall up menu item "P1 Calibration" (see chapt. 8.1)
ÖPress button
P1 Calibration
P2 GLP
P3 Date/Time
P4 Readout
P5 RS-232
P6 Printouts
P7 Units
P8 Modes
P9 Globals
Setup2.02.05
01 Int. cal. - Adjustment with internal weight
ÖUse the cursor ( ►) to select "01 Int. cal."
Setup
P1 01 Int. calibr.
02 Ext. calibr.
03 User calibr.
04 Calibr. test
05 Weight. corr.
06 Aut calibr.
07 Print report
o
Auto cal. time
08
********
********
********
********
0.0
0
1
function
function
function
off
on
function
31.01.05
11 hour

PLT-BA-defsi-0510 87
ÖPress the key; the adjustment with internal ad-
justment weight is made.
Calibration
Internal calibration
ÖAfter successful adjustment the balance automati-
cally returns to weighing mode.
In case of an adjustment error (e.g. objects on the
weighing plate) the display will show an error mes-
sage, repeat adjustment.
Weighing
0.0000
g
0% 100%
0
27.01.05
02 Ext. Cal adjustment with external weight - locked for verifiable devices
03 User cal. - locked for verifiable appliances
04 Cal. test
Here, deviation from the last adjustment is determined. This is only a check, i.e.
no values are changed.
ÖUse the cursor ( ►) to select "04 Cal. test"
Setup
P1 01 Int. calibr.
02 Ext. calibr.
03 User calibr.
04 Calibr. test
05 Weight. corr.
06 Aut calibr.
07 Print report
o
Auto cal. time
08
********
********
********
********
0.0
0
1
function
function
function
off
on
function
31.01.05
11 hour
ÖPress key; calibration test will be executed auto-
matically
Calibration
Calibration check
ÖThe result is displayed
Calibration
Check results
Cal.: 180.1354
Act.: 180.1438
Diff.: - 0.0084
05 Weight corr. - Locked for verifiable appliances
06 Autom. cal. - locked for verifiable appliances
07 Auto. Cal.time – locked for verifiable appliances
08 Print report - printout of the adjustment data
ÖUse the cursor ( ►) to select "08 Print report"
ÖPress key, the current menu item blinks
With the arrow keys save your settings
0 Print report deactivated
1 Print report activated
Setup
P1 01 Int. calibr.
02 Ext. calibr.
03 User calibr.
04 Calibr. test
05 Weight. corr.
06 Aut calibr.
07 Print report
o
Auto cal. time
08
********
********
********
********
0.0
0
1
function
function
function
off
on
function
31.01.05
11 hour
ÖConfirm by pressing the key

PLT-BA-defsi-0510
88
ÖWith "Print report" activated, you will receive a printout of your adjustment data
after each adjustment (example):
8.3.1.1 Verification
General introduction:
According to EU directive 90/384/EEC balances must be officially verified if they are
used as follows (legally controlled area):
a) For commercial transactions if the price of goods is determined by weighing
b) For the production of medicines in pharmacies as well as for analyses in the
medical and pharmaceutical laboratory
c) For official purposes.
d) For manufacturing final packages.
In cases of doubt, please contact your local trade in standard.
Verification instructions
An EU type approval exists for balances described in their technical data as verify-
able. If a balance is used where obligation to verify exists as described above, it
must officially verified and re-verified in regular intervals.
Re-verification of a balance is carried out according to the respective national regula-
tions. The validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!
After verification the balance is sealed at the indicated positions.
Verification of the balance is invalid without the "seal".
***Print report of internal calibration***
Calibrate : internal
Diff.. : 0.0038 g
Signature………………………….

PLT-BA-defsi-0510 89
Position of the “official seals“:
Balances with obligation to verify must be taken out of operation if:
- The weighing result of the balance is outside the error limit. Therefore,
in regular intervals load balance with known test weight (ca. 1/3 of the max.
load) and compare with displayed value.
- The reverification deadline has been exceeded.
Seal Seal