KERN PLJ-N Operating Manual
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 balance
KERN PLJ-N
Version 3.3
04/2013
GB
PLJ-N-BA-e-1333
PLJ-N-BA-e-1333
2
GB
KERN PLJ-N
Version 3.3 04/2012
Operating Manual
Electronic Precision balance
Table of Contents
1 Technical Data ................................................................................................... 4
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 Transportation & Storage ................................................................................. 9
5.1 Testing upon acceptance ........................................................................................................ 9
5.2 Packaging / return transport ................................................................................................. 10
6 Unpacking, Setup and Commissioning ......................................................... 12
6.1 Installation Site, Location of Use .......................................................................................... 12
6.2 Unpacking ............................................................................................................................... 12
6.2.1 Remove the transportation lock ................................................................................................ 12
6.2.2 Placing ...................................................................................................................................... 13
6.2.3 Scope of delivery ...................................................................................................................... 13
6.3 Mains connection ................................................................................................................... 14
6.4 Connection of peripheral devices ......................................................................................... 14
6.5 Initial Commissioning ............................................................................................................ 14
6.5.1 Stability display ......................................................................................................................... 14
6.5.2 Balance zero display ................................................................................................................. 14
7 Adjustment ....................................................................................................... 14
7.1 Automatic adjustment using internal weight ....................................................................... 16
7.2 Adjustment functions “P1 CAL“ ......................................................................................... 17
7.2.1 Internal adjustment - „iCAL“ ...................................................................................................... 18
7.2.2 Adjustment test – „tCAL“ .......................................................................................................... 19
7.2.3 Criteria for starting automatic internal adjustment – „ACAL“ .................................................... 20
7.2.4 Time setting to start automatic internal adjustment – „CAL t“ ................................................ 21
7.2.5 Printout adjustment protocol – „CAL r“ ..................................................................................... 22
7.3 Verification .............................................................................................................................. 23
8 Operating elements ......................................................................................... 25
8.1 Backlit display ......................................................................................................................... 25
8.2 Keyboard overview in weighing mode ................................................................................. 25
9 User menu ................................ ................................ ........................................ 26
9.1 Navigation in the menu .......................................................................................................... 28
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10 Basic Operation ........................................................................................... 29
10.1 Simple weighing ..................................................................................................................... 29
10.2 Weighing with taring .............................................................................................................. 29
10.2.1 Taring ................................................................................................................................... 29
10.2.2 Delete tare ............................................................................................................................ 29
10.3 Standard weighing unit .......................................................................................................... 30
10.4 Weighing units switch-over ................................................................................................... 31
10.5 Underfloor weighing ............................................................................................................... 31
11 Menu function “P6 Func” - Operating modes .......................................... 32
11.1 Settings for Function P6.1 FFun "ALL" ................................................................................ 34
11.2 Parts counting ........................................................................................................................ 35
11.3 Weighing with tolerance range ............................................................................................. 38
11.4 Percent determination ............................................................................................................ 41
11.4.1 Determining the reference weight by weighing (function F4 PrcA) ...................................... 41
11.4.2 Determining the reference weight by entering numeric value (function F4 Prcb) .............. 42
11.5 Density determination – functions “d_Co“ and “d_Li“ ...................................................... 43
11.6 Formulation ............................................................................................................................. 43
11.7 Filter setting ............................................................................................................................ 45
12 Menu function “P2 GLP“ - GLP/ISO protocol ............................................ 47
13 Menu function “P3 rEAd” basic settings .................................................. 50
13.1 Filter settings .......................................................................................................................... 50
13.2 Rest position display ............................................................................................................. 51
13.3 Auto Zero ................................................................................................................................. 52
13.4 Changing readability – decimal place .................................................................................. 53
14 Menu function “P7 othEr”- additional useful functions .......................... 54
14.1 Display background illumination .......................................................................................... 54
14.2 Acoustic signal for key operation ......................................................................................... 55
14.3 Printing balance parameters ................................................................................................. 56
15 Data output RS 232C “P4 Print“ ................................................................. 57
15.1 Technical Data ........................................................................................................................ 57
15.2 Pin allocation of the balance output plug (front view) ....................................................... 57
15.3 Interface cable......................................................................................................................... 58
15.4 Menu function “ P4 Print ” - RS 232C parameter ............................................................... 59
15.4.1 Setting Baudrate „P4.1 bAud” .............................................................................................. 59
15.4.2 Continuous output in standard weighing unit “P4.2 CntA” .................................................... 60
15.4.3 Continuous output in current weighing unit „P4.3 Cntb” ...................................................... 61
15.4.4 Setting data output type: manual/automatic „P4.4 rEPL” .................................................... 62
15.4.5 Setting data output for stable/instable weighing value ......................................................... 63
15.4.6 Entering minimum weight for automatic output "P4.6 Lo” ................................................... 64
15.5 Communication protocol / remote control commands ....................................................... 65
15.5.1 Manual output ....................................................................................................................... 65
15.5.2 PC controlled output ............................................................................................................. 66
15.5.3 Output of date/time ............................................................................................................... 66
16 Error messages ............................................................................................ 67
17 Service, maintenance, disposal .................................................................. 67
17.1 Cleaning................................................................................................................................... 67
17.2 Service, maintenance ............................................................................................................. 67
17.3 Disposal ................................................................................................................................... 67
18 Instant help ................................................................................................... 68
PLJ-N-BA-e-1333
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1 Technical Data
KERN
PLJ 360-3NM
PLJ 600-3NM
Weighing range (max)
360 g
600 g
Readability (d)
1 mg
1 mg
Minimum load (Min)
20 mg
20 mg
Verification value (e)
10 mg
10 mg
Verification class
II
II
Reproducibility
1 mg
2 mg
Linearity
± 4 mg
± 4 mg
Stabilization time (typical)
4 sec
4 sec
Minimum unit weight at
piece counting
1 mg
5 mg
Warm-up time
2 hours
4 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 20, 50, freely selectable
Weighing Units
g, ct, mg
Electric Supply
230 V / 50 Hz, 11V AC
Operating temperature
+ 15° C …. + 30° C
Humidity of air
max. 80 % (not condensing)
Dimensions housing
B x D x H [mm]
with windscreen 206 x 335 x 157
without windscreen 206 x 335 x 85
Dimensions glass draught
shield [mm]
exterior 150 x 150 x 80
interior 140 x 140 x 65
Weighing plate
(stainless steel) [mm]
128 x 128
Weight kg (net)
4 kg
Underfloor weighing
Standard hooks
Interface
RS 232C
PLJ-N-BA-e-1333
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KERN
PLJ 3500-2NM
Weighing range (max)
3500 g
Readability (d)
10 mg
Minimum load (Min)
500 mg
Verification value (e)
100 mg
Verification class
II
Reproducibility
10 mg
Linearity
± 40 mg
Stabilization time (typical)
4 sec
Minimum unit weight at
piece counting
10 mg
Warm-up time
2 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 20, 50, freely selectable
Weighing Units
g, ct, mg
Electric Supply
230 V / 50 Hz, 11V AC
Operating temperature
+ 15° C …. + 30° C
Humidity of air
max. 80 % (not condensing)
Dimensions housing
B x D x H [mm]
206 x 335 x 85
Weighing plate
(stainless steel) [mm]
195 x 195
Weight kg (net)
4.5 kg
Underfloor weighing
standard hooks
Interface
RS 232C
PLJ-N-BA-e-1333
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KERN
PLJ 750-3N
Weighing range (max)
750 g
Readability (d)
1 mg
Reproducibility
2 mg
Linearity
± 3 mg
Stabilization time (typical)
4 sec
Minimum unit weight at
piece counting
5 mg
Warm-up time
4 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 20, 50, freely selectable
Weighing Units
g, ct, mg
Electric Supply
230 V / 50 Hz, 11V AC
Operating temperature
+ 15° C …. + 30° C
Humidity of air
max. 80 % (not condensing)
Dimensions housing
B x D x H [mm]
with windscreen 206 x 335 x 157
without windscreen 206 x 335 x 85
Dimensions glass draught
shield [mm]
exterior 150 x 150 x 80
interior 140 x 140 x 65
Weighing plate
(stainless steel) [mm]
128 x 128
Weight kg (net)
4 kg
Underfloor weighing
Standard hooks
Interface
RS 232C
PLJ-N-BA-e-1333
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2 Declaration of Conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: info@kern-sohn.de
Tel: 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
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
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
with 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.
Electronic Balance: KERN PLJ_N / PLJ_NM
EU Directive
Standards
2004/108/EC
EN 61326-1:2006
2006/95/EC
EN 61010-1:2001/AC:2002
Signatur
Signature
Datum
Date
21.03.2013
Ort der Ausstellung
Place of issue
72336 Balingen
Albert Sauter
KERN & Sohn GmbH
Geschäftsführer
Managing director
KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0
Fax +49-[0]7433/9933-149, E-Mail: info@kern-sohn.com, Internet: www.kern-sohn.com
PLJ-N-BA-e-1333
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3 Basic Information (General)
3.1 Proper use
The balance you purchased is intended to determine the weighing value of material
to be weighed. It is intended to be used as a “non-automatic“ balance, i.e. the
material to be weighed is manually and carefully placed in the centre of the weighing
plate. As soon as a stable weighing value is reached the weighing value can be read.
3.2 Improper Use
Do not use balance for dynamic weighings. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“ in the balance. (Example: Slowly
draining fluids from a container on the balance.)
Do not leave permanent load on the weighing plate. This may damage the
measuring system.
-Impacts and overloading exceeding the stated maximum load (max) of the balance,
minus a possibly existing tare load, must be strictly avoided. Balance may be
damage by this.
Never operate balance in explosive environment. The serial version is not explosion
protected.
The structure of the balance may not be modified. This may lead to incorrect
weighing results, safety-related faults and destruction of the balance.
The balance may only be used according to the described conditions. Other areas of
use must be released by KERN in writing.
3.3 Warranty
Warranty claims shall be voided in case
Our conditions in the operation manual are ignored
The appliance is used outside the described uses
The appliance is modified or opened
Mechanical damage 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.
PLJ-N-BA-e-1333
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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.
Versions in other languages are non-binding translations.
The only binding version is the original document in German.
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.
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 glass wind screen, weighing platform, power
unit etc. against shifting and damage.
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5.2 Packaging / return transport
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.
PLJ-N-BA-e-1333
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1
Secure all parts such as glass wind screen, weighing platform,
power unit etc. against shifting and damage.
1. Mains adapter
2. Weighing pan (128 x 128 mm)
3. Carrier weighing pan
4. Weighing pan (195 x 195 mm)
2
3 3
3 3
4
PLJ-N-BA-e-1333
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6 Unpacking, Setup and Commissioning
6.1 Installation Site, Location of Use
The balances are designed in a way that reliable weighing results are achieved in
common conditions of use.
You will work accurately and fast, if you select the right location for your balance.
Therefore, observe the following for the installation site:
Place the balance on a firm, level surface;
Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
Protect the balance against direct draughts due to open windows and doors;
Avoid jarring during weighing;
Protect the balance against high humidity, vapours and dust;
Do not expose the device to extreme dampness for longer periods of time.
Non-permitted condensation (condensation of air humidity on the appliance)
may occur if a cold appliance is taken to a considerably warmer environment.
In this case, acclimatize the disconnected appliance for ca. 2 hours at room
temperature.
Avoid static charge of goods to be weighed or weighing container.
Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. Change location or remove
source of interference.
6.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
6.2.1 Remove the transportation lock
Remove the transportation lock on the bottom side of the balance (see fig.)
PLJ-N-BA-e-1333
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2
6.2.2 Placing
Design layout of weighing balance:
Assemble all parts as per illustration. To ensure earthing of weighing plate,
Place carrier (2) right at rear.
Models readability d = 1 mg:
Models readability d = 10 mg:
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
Mains power supply
Operating Manual
Draught shield (models providing readability of d =
1mg only)
Hook for underfloor weighing
PLJ-N-BA-e-1333
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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.
After connection to the power supply the balance will carry out a self-test. The
balance is ready for weighing when the weight display appears. If the display diverts
from zero, press the TARE-key.
6.4 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.
6.5 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.
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
6.5.1 Stability display
The appearance of the stability symbol [ ] on the display indicates that the
balance is in a stable state. If the status is instable the [ ] display disappears.
6.5.2 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 key and the balance will start resetting to zero [ ]
.
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.
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Adjustment with internal weight
Automatic start (chpt. 7.1)
1. Temperature controlled (chpt.
7.1)
A change in temperature of 3 °C
triggers the weighing balance to send
a message announcing internal
adjustment:
2. Time controlled
(chpt.7.1)
After a set time interval (1 – 12 h) in
the menu (P1.5 CALt) has passed the
weighing balance will send a message
about internal adjustment:
PLJ-N-BA-e-1333
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7.1 Automatic adjustment using internal weight
With the internal adjustment weight, the weighing accuracy can be checked and readjusted at any time.
The automatic adjustment function is always enabled. You can start adjustment at
any time by pressing the CAL-key manually.
Automatic adjustment is started each time
after the weighing balance was disconnected from the mains
when temperature changes take place
at the end of a time interval
Temperature / time controlled adjustment is taking place:
5 minutes before the start of automatic adjustment, this will be announced by a "º C“,
(change of temperature) or a “►“ (after a certain time interval ends) symbol on the
display.
or
The user must complete his/her weighing process within this time.
After 5 minutes [ ] appears on the display.
This starts a “count down” of 30 seconds [ ] [ ]. During these 30
seconds it is possible to cancel the adjustment by pressing the TARE key. This
makes the balance return to weighing mode in order to e. g. complete an unfinished
measurement.
After a further 5 minutes the automatic adjustment will restart and [ ]
appears.
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7.2 Adjustment functions “P1 CAL“
Models PLJ:
P1.1 iCAL | [internal adjustment]
P1.2 ECAL | [external adjustment] - not documented
P1.3 tCAL | [adjustment test]
P1.4 ACAL | both/nonE/tenno/tinnE [criteria for starting automatic adjustment]
P1.5 CALt | 1 h ÷ 12h [time setting for starting automatic adjustment]
P1.6 CALr | YES/no [printout adjustment log]
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7.2.1 Internal adjustment - „iCAL“
The automatic adjustment function with internal adjusting weight is permanently
enabled. It is also possible to start adjusting at any time by pressing the CAL-key or
by invoking the menu item “P1.1 iCAL“.
Operation:
Display:
Start balance by pressing
0.0000 g
Press .
P1 CAL
Press .
Ensure that there are no objects on the weighing plate.
P1.1 iCAL
Confirm by pressing ; automatic adjustment will follow.
After successful adjustment the balance automatically
returns to weighing mode.
Information:
Adjustment errors are indicated by an acoustic signal and an
error message will appear on the display.
Press and repeat adjustment process.
CAL
- - - - - - - -
0.0000 g
It is possible to cancel adjustment by pressing
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7.2.2 Adjustment test – „tCAL“
Here, deviation from the last adjustment is determined. This is only a check, i.e. no
values are changed.
Operation:
Display:
Start balance by pressing
0.0000 g
Press .
P1 CAL
Press .
P1.1 iCAL
Press repeatedly button. Ensure that there are no
objects on the weighing plate.
P1.3 tCAL
Press , adjustment test is carried out automatically. The
result is displayed
CAL
diff
d 0,0042 g
Press , balance returns to menu
P1.3 tCAL
Press repeatedly until “SAVE“? appears
Press to save the changes you made.
Press , to cancel the changes you made. Afterwards the
balance automatically jumps back to weighing mode.
SAVE?
0.0000 g
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7.2.3 Criteria for starting automatic internal adjustment
– „ACAL“
Note:
This adjustment function is locked [Er 9 lock] in verifiable devices.
Operation:
Display:
Start balance by pressing
0.0000 g
Press .
P1 CAL
Press .
P1.1 iCAL
Press repeatedly until function “ACAL“ appears
P1.4 ACAL
Press , current setting will be flashing
nonE
Press the arrow keys ( ), to select among the settings below:
nonE Automatic adjustment disabled
tEmp Start automatic adjustment after change in temperature
timE Start automatic Adjustment dependent on setting
of function P1.5 CALt
both Start automatic Adjustment dependent on temperature
and time
timE
Confirm setting by pressing . Weighing balance returns to
menu.
P1.4 ACAL
Press repeatedly until “SAVE“? appears.
SAVE ?
The changes you made will be saved by pressing .
To cancel changes . Afterwards the balance automatically
jumps back to weighing mode.
0,0000 g
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7.2.4 Time setting to start automatic internal adjustment
– „CAL t“
Note:
This adjustment function is locked [Er 9 lock] in verifiable devices.
Set the time interval after which automatic adjustment is to be started in this menu
item as follows:
Operation:
Display:
Start balance by pressing
0.0000 g
Press .
P1 CAL
Press .
P1.1 iCAL
Press repeatedly until function "P1.5 CALt“ appears
P1.5 CALt
Press , current setting will be flashing
1 h
Use the arrow keys ( ) to select a time interval 1 – 12 h
12 h
Confirm setting by pressing . Weighing balance returns to
menu.
P1.5 CALt
Press repeatedly until “SAVE“? appears.
SAVE ?
The changes you made will be saved by pressing .
To cancel changes, press the key. Afterwards the balance
automatically jumps back to weighing mode.
0.0000 g
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