KERN PCB 250-3 User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-mail:[e-mail]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating Manual
Precision balance
KERN PCB
Version 1.8
05/2017
GB
PCB-BA-e-1718

PCB-BA-e-1718
2
GB
KERN PCB
Version 1.8 05/2017
Operating Manual
Compact balance
Table of Contents
1Technical Data ............................................................................................... 4
2Declaration of conformity ............................................................................. 7
3Basic Information (General).......................................................................... 8
3.1 Proper use................................................................................................................................. 8
3.2 Improper Use............................................................................................................................. 8
3.3 Warranty.................................................................................................................................... 8
3.4 Monitoring of Test Resources................................................................................................. 8
4Basic Safety Precautions.............................................................................. 9
4.1 Pay attention to the instructions in the Operation Manual .................................................. 9
4.2 Personnel training.................................................................................................................... 9
5Transportation & Storage.............................................................................. 9
5.1 Testing upon acceptance ........................................................................................................ 9
5.2 Packaging.................................................................................................................................. 9
6Unpacking, Setup and Commissioning ....................................................... 9
6.1 Installation Site, Location of Use............................................................................................ 9
6.2 Unpacking/erection ................................................................................................................ 10
6.3 Mains connection................................................................................................................... 10
6.4 Operation using a (rechargeable) battery (optional)........................................................... 11
6.5 Connection of peripheral devices......................................................................................... 11
6.6 Initial Commissioning ............................................................................................................ 12
6.7 Linearisation ........................................................................................................................... 12
6.8Adjustment.............................................................................................................................. 15
6.9 Adjustment.............................................................................................................................. 15
6.10 Underfloor weighing............................................................................................................... 16
7Operation elements ..................................................................................... 17
7.1 Overview of display................................................................................................................ 17
7.2 Keyboard overview................................................................................................................. 17
8Basic Operation........................................................................................... 18
Start-up................................................................................................................................................. 18
Switching Off ....................................................................................................................................... 18
Weighing............................................................................................................................................... 18
Taring.................................................................................................................................................... 18
PRE-TARE-Function............................................................................................................................ 19
Plus/minus weighings......................................................................................................................... 20
Parts counting...................................................................................................................................... 20
Net-total weighings ............................................................................................................................. 21
Percent determination......................................................................................................................... 22

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9Menu ............................................................................................................. 23
9.1 Navigation in the menu.......................................................................................................... 23
9.2 Menu overview........................................................................................................................ 26
9.3 Description of individual menu items .................................................................................. 28
Weighing Units .................................................................................................................................... 28
Dosing and Zero-tracking................................................................................................................... 29
Selection adjustment weight.............................................................................................................. 29
Filter...................................................................................................................................................... 31
Display background illumination....................................................................................................... 32
Animal weighing function................................................................................................................... 33
Reset to factory setting...................................................................................................................... 34
9.4 Interface parameters .............................................................................................................. 35
Data transfer mode.............................................................................................................................. 35
printout................................................................................................................................................. 36
Baud rate.............................................................................................................................................. 37
10 Data output RS 232 C .................................................................................. 37
10.1 Technical Data ........................................................................................................................ 37
10.2 Pin allocation of balance output bushing:........................................................................... 37
10.3 Explanation of the data transfer............................................................................................ 38
10.4 Output on bar code printer.................................................................................................... 40
11 Service, maintenance, disposal.................................................................. 40
11.1 CLEANING............................................................................................................................... 40
11.2 Service, maintenance............................................................................................................. 40
11.3 Disposal................................................................................................................................... 40
12 Instant help................................................................................................... 41

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1 Technical Data
KERN PCB 100-3 PCB 200-2 PCB 250-3 PCB 350-3
Readability (d) 0.001 g 0.01 g 0.001 g 0.001 g
Weighing range (max) (d) 100 g 200 g 250 g 350 g
Taring range (subtractive) 100 g 200 g 250 g 350 g
Reproducibility 0.001 g 0.01 g 0.001 g 0.002 g
Linearity ±0.003 g ± 0.02 g ±0.005 g ±0.005 g
Minimum unit weight at
piece counting 0.002 g 0.02 g 0.002 g 0.002 g
Warm-up time 2 hours
Reference quantities at
piece counting 5, 10, 20, 25, 50
Weighing Units Details „Weighing units“ see chpt. 9.3
Recommended adjustment
weight, not added (class)
Details for „Selection of the
Adjustment weight“ in ch. 9.3
100 g (F1) 200 g (M1) 200 g (F1) 300 g (F1)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 163 x 245 x 79
Windscreen mm Ø 106,
high 42 - Ø 106, high 42
Weighing plate mm Ø 81 Ø 105 Ø 81
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 RS 232
Underfloor weighing standard

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KERN PCB 1000-1 PCB 1000-2 PCB 2000-1 PCB 2500-2
Readability (d) 0.1 g 0.01 g 0.1 g 0.01 g
Weighing range (max) (d) 1000 g 1000 g 2000 g 2500 g
Taring range (subtractive) 1000 g 1000 g 2000 g 2500 g
Reproducibility 0.1 g 0.01 g 0.1 g 0.01 g
Linearity ±0.2 g ±0.03 g ±0.2 g ±0.05 g
Minimum unit weight at
piece counting 0.2 g 0.02 g 0.2 g 0.02 g
Warm-up time 30 minutes 2 hours 30 minutes 2 hours
Reference quantities at
piece counting 5, 10, 20, 25, 50
Weighing Units Details „Weighing units“ see chpt. 9.3
Recommended adjustment
weight, not added (class)
Details for „Selection of the
Adjustment weight“ in ch. 9.3
1000 g (M1) 1000 g (F1) 2000 g (M1) 2000 g (F1)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 163 x 245 x 79
Weighing plate mm 130 x 130
Weight kg (net) 1.4
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 RS 232
Underfloor weighing standard

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KERN PCB 3500-2 PCB 6000-1 PCB 6000-0 PCB 10000-1
Readability (d) 0.01 g 0.1 g 1 g 0.1 g
Weighing range (max) (d) 3500 g 6 kg 6 kg 10 kg
Taring range (subtractive) 3500 g 6 kg 6 kg 10 kg
Reproducibility 0.02 g 0.1 g 1 g 0.1 g
Linearity 0.05 g ± 0.3 g ± 2 g ± 0.3 g
Minimum unit weight at
piece counting 0.02 g 0.2 g 2 g 0.2 g
Warm-up time 2 hours 2 hours 30 minutes 2 hours
Reference quantities at
piece counting 5, 10, 20, 25, 50
Weighing Units Details „Weighing units“ see chpt. 9.3
Recommended adjustment
weight, not added (class)
Details for „Selection of the
Adjustment weight“ in ch. 9.3
3000 g (F1) 5000 g (F2) 5000 g (M2) 10 kg (F1)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 163 x 245 x 79
Weighing plate mm 130 x 130 150 x 170 150 x 170 150 x 170
Weight kg (net) 1.4 2.0 2.0 2.0
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 RS 232
Underfloor weighing standard

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2 Declaration of conformity
To view the current EC/EU Declaration of Conformity go to:
www.kern-sohn.com/ce
The scope of delivery for verified weighing balances (= conformity-
rated weighing balances) includes a Declaration of Conformity.

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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 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 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
3.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the
balance and, if applicable, the testing weight, must be checked regularly. The
responsible user must define a suitable interval as well as type and scope of this
test. Information is available on KERN’s home page (www.kern-sohn.com) with
regard to the monitoring of balance test substances and the test weights required for
this. In KERN’s accredited DKD calibration laboratory test weights and balances may
be calibrated (return to the national standard) fast and at moderate cost.

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4 Basic Safety Precautions
4.1 Pay attention to the instructions in the Operation Manual
Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN
balances.
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.
5.2 Packaging
Keep all parts of the original packaging in case you need to return the appliance.
Only use original packaging for returning.
Before sending, disconnect all connected cables and loose/movable parts.
Attach possibly existing transport safeguards. Secure all parts, e.g. weighing plate,
mains adapter etc., to prevent slipping and damage.
6 Unpacking, Setup and Commissioning
6.1 Installation Site, Location of Use
The balances are designed in a way that reliable weighing results are achieved in
common conditions of use.
You will work accurately and fast, if you select the right location for your balance.
Therefore, observe the following for the installation site:
•Place the balance on a firm, level surface;
•Avoid extreme heat as well as temperature fluctuation caused by installing next to
a radiator or in the direct sunlight;
•Protect the balance against direct draughts due to open windows and doors;
•Avoid jarring during weighing;
•Protect the balance against high humidity, 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 and weighing container.

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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/erection
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
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.
Scope of delivery / serial accessories
•Balance
•Weighing plate
•Mains power supply
•Protective cover
•Operating Manual
•Windscreen (PCB 100-3, PCB 250-3, PCB 350-3)
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.