KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-mail:info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instructions
Precision balance
KERN PCD
Version 1.1
10/2012
GB
PCD-BA-e-1211
2 PCD-BA-e-1211
GB
KERN PCD
Version 1.1 10/2012
Operating instructions
Precision balance
Contents
1 Technical data ................................................................................................ 4
2 Basic Information (General) .......................................................................... 6
2.1 Proper use .................................................................................................................................. 6
2.2 Improper Use .............................................................................................................................. 6
2.3 Warranty ..................................................................................................................................... 6
2.4 Monitoring of Test Resources ..................................................................................................... 6
3 Basic Safety Precautions .............................................................................. 7
3.1 Pay attention to the instructions in the Operation Manual .......................................................... 7
3.2 Personnel training ....................................................................................................................... 7
4 Transport and storage ................................................................................... 7
4.1 Testing upon acceptance ........................................................................................................... 7
4.2 Packaging / return transport ....................................................................................................... 7
5 Unpacking, Setup and Commissioning ....................................................... 8
5.1 Installation Site, Location of Use ................................................................................................ 8
5.2 Unpacking/installation ................................................................................................................. 8
5.3 Mains connection ...................................................................................................................... 11
5.4 Operation using a rechargeable battery (optional) ................................................................... 11
5.5 Connection of peripheral devices ............................................................................................. 12
5.6 Initial Commissioning ................................................................................................................ 12
5.7 Adjustment ................................................................................................................................ 12
5.8 Adjustment ................................................................................................................................ 13
6 Operating elements ..................................................................................... 14
6.1 Overview of display ................................................................................................................... 14
6.2 Keyboard overview ................................................................................................................... 14
7 Basic Operation ........................................................................................... 15
7.1 Start-up ..................................................................................................................................... 15
7.2 Switching Off............................................................................................................................. 15
7.3 Weighing ................................................................................................................................... 15
7.4 Taring........................................................................................................................................ 16
7.5 Pre-Tare function ...................................................................................................................... 17
7.6 Plus/minus weighings ............................................................................................................... 17
7.7 Parts counting ........................................................................................................................... 18
7.8 Net-total weighing ..................................................................................................................... 19
7.9 Percent determination .............................................................................................................. 20
PCD-BA-e-1211 3
8 Menu ............................................................................................................. 21
8.1 Navigation in the menu ............................................................................................................. 21
8.2 Menu overview .......................................................................................................................... 24
8.3 Description of individual menu items ........................................................................................ 26
8.3.1 Weighing Units ......................................................................................................................... 26
8.3.2 Dosing and Zero-tracking ......................................................................................................... 27
8.3.3 Selection of adjustment weight ................................................................................................. 28
8.3.4 Display background illumination ............................................................................................... 29
8.3.5 Animal weighing function .......................................................................................................... 30
8.3.6 Foot switch ................................................................................................................................ 31
8.3.7 Reset to factory setting ............................................................................................................. 31
8.4 Interface parameters ................................................................................................................ 32
8.4.1 Data transfer mode ................................................................................................................... 32
8.4.2 Printout ..................................................................................................................................... 33
8.4.3 Printout example ....................................................................................................................... 34
8.4.4 Baud rate .................................................................................................................................. 34
9 Data output RS 232 C .................................................................................. 35
9.1 Technical data .......................................................................................................................... 35
9.2 Pin allocation of balance output bushing: ................................................................................. 35
9.3 Explanation of the data transfer ................................................................................................ 36
9.4 Output on bar code printer ........................................................................................................ 38
10 Service, maintenance, disposal .................................................................. 39
10.1 Cleaning .................................................................................................................................... 39
10.2 Service, maintenance ............................................................................................................... 39
10.3 Disposal .................................................................................................................................... 39
11 Instant help ................................................................................................... 40
4 PCD-BA-e-1211
1 Technical data
KERN
PCD 250-3
PCD 400-3
Readability (d)
0.001 g
0.001 g
Weighing range (max)
250 g
400 g
Taring range (subtractive)
250 g
400 g
Reproducibility
0.002 g
0.002 g
Linearity
±0.005 g
±0.005 g
Minimum unit weight at
piece counting
0.002 g
0.002 g
Warm-up time
2 hours
4 hours
Reference quantities at
piece counting
5, 10, 20, 25, 50
Weighing Units
Details „Weighing units“ see chpt. 8.3.1
Recom. adjustment weight, not
added (class)
Details about „Selection of
adjustment weight“ see chap.
8.3.3
250 g (F1)
400 g (F1)
Stabilization time (typical)
3 sec.
Operating temperature
+ 5° C .... + 35° C
Humidity of air
max. 80 % (not condensing)
Dimensions, completely assembled
(W x D x H) mm
165 x 245 x 142
Windshield rectangular mm
inside: 146x146x70
outside: 158x158x63
Dimensions Display housing
140 x 75 x 46
Weighing plate mm
Ø 10.5
Weight kg (net)
1.1
Electric Supply
220V-240V AC, 50 Hz / 9 V, 300 mA
Battery operation
9 V compound battery (optional)
Rechargeable battery (optional)
Operating time 24 h with display background illumination
Operating time 48 h without display background
illumination
loading time 8 h
Interface
RS232
PCD-BA-e-1211 5
KERN
PCD 2500-2
PCD 4000-2
PCD 10K0.1
Readability (d)
0.01 g
0.01 g
0.1 g
Weighing range (max)
2500 g
4000 g
10 kg
Taring range (subtractive)
2500 g
4000 g
10 kg
Reproducibility
0.02 g
0.02 g
0.1 g
Linearity
±0.05 g
±0.05 g
±0.3 g
Minimum unit weight at
piece counting
0.02 g
0.02 g
0.2 g
Warm-up time
4 hours
4 hours
2 hours
Reference quantities at
piece counting
5, 10, 20, 25, 50
Weighing Units
Details „Weighing units“ see chpt. 8.3.1
Recom. adjustment weight, not
added (class)
Details about „Selection of
adjustment weight“ see chap.
8.3.3
2500 g (F1)
4000 g (F1)
10 kg (F1)
Stabilization time (typical)
3 sec.
Operating temperature
+ 5° C .... + 35° C
Humidity of air
max. 80 % (not condensing)
Dimensions, completely assembled
(W x D x H) mm
165 x 280 x 73
Dimensions Display housing
140 x 75 x 46
Weighing plate mm
160x160
Weight kg (net)
1.6
Electric Supply
220V-240V AC, 50 Hz / 9 V, 300 mA
Battery operation
9 V compound battery (optional)
Rechargeable battery (optional)
Operating time 24 h with display background illumination
Operating time 48 h without display background
illumination
loading time 8 h
Interface
RS232
6 PCD-BA-e-1211
2 Basic Information (General)
2.1 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.
2.2 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“. (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.
2.3 Warranty
Warranty claims shall be voided in case
Our conditions in the operation manual are ignored
The appliance is used outside the described uses
The appliance is modified or opened
Mechanical damage and damage caused by media, liquids
natural wear and tear
The appliance is improperly set up or incorrectly electrically connected
The measuring system is overloaded
2.4 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.
PCD-BA-e-1211 7
3 Basic Safety Precautions
3.1 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.
3.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
4 Transport and storage
4.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
4.2 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.
Secure all parts such as the glass wind screen, the
weighing platform, power unit etc. against shifting and
damage.
8 PCD-BA-e-1211
5 Unpacking, Setup and Commissioning
5.1 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.
On the installation site observe the following:
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 and weighing container.
Do not operate in areas with hazard of explosive material or in potentially
explosive atmospheres due to materials such as gasses, steams, mists or dusts.
Keep away chemicals (such as liquids or gasses), which could attack and
damage the balance inside or from outside.
Keep IP protection of the device.
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.
5.2 Unpacking/installation
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
Scope of delivery / serial accessories
Balance
Weighing plate
Mains adapter
Protective cover
Operating instructions
Windshield (only models PCD 400-3)
PCD-BA-e-1211 9
Mount the display unit in a way that facilitates operation and where it is easy to see.
1. Display unit assembled
For disassembly remove the assembly sheet by loosening the marked screws.
After that the display unit can be placed freely.
2. Display unit freely placed
10 PCD-BA-e-1211
3. Using with tripod (optional)
In order to raise the display, the display unit can be assembled to an optionally
available tripod (KERN PCD-A03).
Assembly see installation instructions of the tripod.
or
The balance must be installed in a way that the weighing plate is exactly in horizontal
position.
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
PCD-BA-e-1211 11
5.3 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.
5.4 Operation using a rechargeable battery (optional)
Lift-off the battery cover on the lower side of the balance. Connect 9 V compound
battery.
Replace the battery compartment cover.
For battery operation the balance has an automatic switch-off function which can be
activated or deactivated in the menu.
In weighing mode keep the PRINT key pressed until “Unit“ appears.
Press MODE key repeatedly until „AF“ appears.
Use the SET key to confirm.
Use the MODE key to choose between the two following settings:
„AF on“:
In order to save the battery, the balance switches automatically
off after 3 minutes without weighing.
„AF off“:
Switch-off function deactivated.
Use the SET key to confirm selection. The balance returns to weighing mode.
12 PCD-BA-e-1211
The empty battery is indicated on the display by “LO“. Press ON/OFF-key and
replace the battery immediately.
If the balance is not used for a longer time, take out the batteries and store them
separately. Leaking battery liquid could damage the balance.
If there exists an optional rechargeable battery, it has to be connected in the battery
compartment via a separate plug-in socket. Now the mains adapter delivered with
the rechargeable battery must be applied.
5.5 Connection of peripheral devices
Before connecting or disconnecting of additional devices (printer, PC) to the data
interface, always disconnect the balance from the power supply.
With your balance, only use accessories and peripheral devices by KERN, as they
are ideally tuned to your balance.
5.6 Initial Commissioning
In order to obtain exact results with the electronic balances, the 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.
5.7 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.
Connection of rechargeable battery
Connection of battery
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