KERN CPB-N User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail:
[e-mail]
Phone +49-[0]7433- 9933-0
Fax +49-[0]7433-9933-149
Internet:
www.kern-sohn.com
Instruction Manual
Counting balance
KERN CPB-N / CPB-DM
Version 2.4
08/2014
GB
CPB-N / CPB-DM-BA-e-1424

GB
KERN CPB-N / CPB-DM
Version 2.4 08/2014
Instruction Manual
Counting balance
Contents
1Technical data................................................................................................ 5
2Appliance overview ....................................................................................... 7
2.1 Overview of display.................................................................................................... 8
2.1.1 Display weight............................................................................................................................. 8
2.1.2 Display reference weight ............................................................................................................ 8
2.1.3 Display quantity........................................................................................................................... 8
2.2 Keyboard overview .................................................................................................... 9
3Basic Information (General)........................................................................ 10
3.1 Proper use................................................................................................................10
3.2 Improper Use............................................................................................................10
3.3 Warranty...................................................................................................................10
3.4 Monitoring of Test Resources...................................................................................11
4Basic Safety Precautions............................................................................ 11
4.1 Pay attention to the instructions in the Operation Manual.........................................11
4.2 Personnel training.....................................................................................................11
5Transport and storage................................................................................. 11
5.1 Testing upon acceptance..........................................................................................11
5.2 Packaging / return transport .....................................................................................11
6Unpacking, Setup and Commissioning ..................................................... 12
6.1 Installation Site, Location of Use...............................................................................12
6.2 Unpacking.................................................................................................................12
6.2.1 Placing...................................................................................................................................... 12
6.2.2 Scope of delivery...................................................................................................................... 14
6.3 Mains connection......................................................................................................14
6.4 Rechargeable battery operation (optional)................................................................14
6.5 Connection of peripheral devices..............................................................................14
6.6 Initial Commissioning................................................................................................14
6.7 Adjustment................................................................................................................15
6.7.1 Models CPB-N (non verified models) ....................................................................................... 15
6.7.2 Models CPB-DM (verified models) ........................................................................................... 17
6.8 Linearization (non-verified models only)....................................................................19
6.9 Verification................................................................................................................22
6.9.1 Adjustment switch and seals.................................................................................................... 23
6.10 Checking the balance verification settings................................................................23
6.11 Service mode (verified models).................................................................................24
CPB-N / CPB-DM-BA-e-1424 3

7Operation Mode ........................................................................................... 27
7.1 Switch on/off and set zero ........................................................................................27
7.2 Simple weighing........................................................................................................27
7.3 Weighing with taring .................................................................................................28
7.4 Display background illumination................................................................................30
8Piece counting ............................................................................................. 31
8.1 Determination of the reference weight by weighing...................................................31
8.2 Numeric entering of the reference weight .................................................................33
8.3 Automatic correction of the reference weight (verifiable models only).......................34
9Totalization................................................................................................... 35
9.1 Manual totalizing.......................................................................................................35
9.2 Automatic adding-up.................................................................................................38
10 Weighing to target quantity or target weight and tolerance check......... 39
10.1Tolerance check for target quantity...........................................................................39
10.2 Tolerance check for target weight.............................................................................41
11 Change readability (only models CPB-M).................................................. 43
12 Menu (non verifiable models) ..................................................................... 44
12.1 Menu overview..........................................................................................................45
13 Data output RS 232 C .................................................................................. 47
13.1 Technical data..........................................................................................................47
13.2 Remote control instructions ......................................................................................47
14 Service, maintenance, disposal.................................................................. 48
14.1 Cleaning ...................................................................................................................48
14.2 Service, maintenance ...............................................................................................48
14.3 Disposal....................................................................................................................48
14.4 Error messages ........................................................................................................48
15 Instant help................................................................................................... 49
16 Declaration of conformity ........................................................................... 50
CPB-N / CPB-DM-BA-e-14244

1 Technical data
KERN CPB 6K0.1N CPB 15K0.2N CPB 30K0.5N
Readability (d) 0.0001 kg 0.0002 kg 0.0005 kg
Weighing range (max) 6 kg 15 kg 30 kg
Reproducibility 0.0001 kg 0.0002 kg 0.0005 kg
Linearity ± 0.0002 kg ± 0.0004 kg ± 0.002 kg
Recommended adjusting
weight (not supplied) 5 kg (F2) +
1 kg (F2) 10 kg (F2) + 5 kg (F2) 20 kg (F2) + 10 kg (F2)
Weighing Units kg, lb
Stabilization time 2 sec.
Warm-up time 120 min.
Minimum piece weight 100 mg 250 mg 500 mg
Reference quantity freely selectable
Input Voltage 220 V – 240 V AC 50 Hz
Mains adapter
Secondary voltage 12 V, 500 mA
Rechargeable battery
(optional)
Operating time
Background illumination on: 60 h
Background illumination off: 70 h
Loading time of battery 12 h
Auto-Off (battery) Options: 3, 5, 15, 30 min.
Dimensions fully mounted
(W x D x H) 320 x 350 x 125 mm
Weighing surface 294 x 225 mm
Permissible ambient
condition 0° C to + 40° C
Humidity of air max. 80 % relative (not condensing)
Net weight (kg) 3.8 kg
CPB-N / CPB-DM-BA-e-1424 5

KERN CPB 6K1DM CPB 15K2DM CPB 30K5DM
Readability (d) 0.001 kg; 0.002 kg 0.002 kg;0.005 kg; 0.005 kg;0.01 kg;
Weighing range (max) 3 kg; 6 kg 6 kg; 15 kg 15 kg; 30 kg
Minimum weight (min) 20 g 40 g 100 g
Reproducibility 0.001 kg; 0.002 kg 0.002 kg; 0.005 kg 0.005 kg; 0.01 kg
Linearity ± 0.002 kg;
± 0.004 kg ± 0.004 kg; ± 0.01 kg ± 0.01 kg; ± 0.02 kg
Verification value (e) 1 g 2 g 5 g
Accuracy class III
Recommended adjusting
weight (not supplied) 5 kg (F2)
1 kg (F2) 10 kg (F2) 5 kg (F2) 20 kg (F2) 10 kg (F2)
Weighing Units kg
Stabilization time 2 sec.
Warm-up time 10 min.
Minimum piece weight 100 mg 250 mg 500 mg
Reference quantity freely selectable
Input Voltage 220 V – 240 V AC 50 Hz
Mains adapter
Secondary voltage 12 V, 500 mA
Rechargeable battery
(optional)
Operating time
Background illumination on: 60 h
Background illumination off: 70 h
Loading time of battery 14 h
Auto-Off (battery) Options: 3, 5, 15, 30 min.
Dimensions fully mounted
(W x D x H) mm 320 x 350 x 125 mm
Weighing surface 294 x 225 mm
Permissible ambient
condition -10° C to + 40° C
Humidity of air max. 80 % relative (not condensing)
Net weight (kg) 3.8 kg
CPB-N / CPB-DM-BA-e-14246

2 Appliance overview
1. Weighing plate / rechargeable battery compartment
(under weighing plate)
2. Bubble level
3. RS 232 interface
4. Footscrews
5. ON/OFF switch
6. Mains adapter connection
7. Adjustment switch
CPB-N / CPB-DM-BA-e-1424 7

2.1 Overview of display
Weight
Reference weight
Quantity
Battery
charge status display
2.1.1 Display weight
Here the weight of the load is displayed in [kg].
The arrows above the symbols show:
Battery very low
NET Net weight
Stability display
aZeroing display
2.1.2 Display reference weight
Here, the reference weight of a sample is displayed in [g]. This value is either
entered by user of calculated by balance.
The arrows above the symbols show:
Reference weight placed on balance too small
PRESET Stored target quantity / target weight
Number of pieces placed on balance too small
2.1.3 Display quantity
Here, all the pieces placed on balance are immediately displayed by number.
The arrows above the symbols show:
M Data in the summation memory
CPB-N / CPB-DM-BA-e-14248

2.2 Keyboard overview
Selection Function
•
Numeric keys
•
Deleting key
•
Call up target quantity and target weight mode
•Addition in sum memory
•Call up total memory
•Enter/display limit value for tolerance check
•
Invoke display background illumination (press button long
time)
•Output to external device (printer) or PC
•Enter reference weight through weighing
•Numeric entry reference weight
•Function /parameter selection
•Taring key
•Save
•Zeroing key
•Back to weighing mode
CPB-N / CPB-DM-BA-e-1424 9

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“. (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
CPB-N / CPB-DM-BA-e-142410

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.
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 Transport and storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
5.2 Packaging / return transport
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.
CPB-N / CPB-DM-BA-e-1424 11

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.
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.
6.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
6.2.1 Placing
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
CPB-N / CPB-DM-BA-e-142412

Ensure that transport guard has been removed
(only existing in 6 kg models)
To loosen the transport guard screw out transport screw [1] anticlockwise.
For transportation carefully screw-in transport screw clockwise till to the stopper
and then fix it using locknut.
1
CPB-N / CPB-DM-BA-e-1424 13

6.2.2 Scope of delivery
Serial accessories:
•Balance
•Weighing plate
•Power cable
•Protective cover
•Instruction Manual
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.
6.4 Rechargeable battery operation (optional)
The internal battery is charged with the supplied mains cable.
Before the first use, the rechargeable battery should be charged by connecting it to
the mains power cable for at least 12 hours. The operating time of the battery is
about. 70h. Charging time until complete recharging ca. 12h.
AUTO-OFF function can be selected after 3, 5, 15, 30 min. to save the rechargeable
battery (see chap.12).
If an arrow appears on the weight display []above the battery symbol
or "bat lo" when turning on the balance, this is an indication that the capacity of the
rechargeable battery will soon be exhausted. The balance will be ready to operate
for about another 10 hours, then it will switch off automatically. Connect the power
cable as soon as possible to load the rechargeable battery.
The LED display under the piece number window informs you during charging about
the charging status of the rechargeable battery.
red: Battery is almost discharged
green: Battery is completely discharged
6.5Connection 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.
6.6Initial Commissioning
A warming up time of 2 hours 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.
CPB-N / CPB-DM-BA-e-142414

6.7 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.
Procedure when adjusting:
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization. Ensure that there are no objects on the weighing plate.
Provide calibration weight, for details, see chapter 1 "Technical Data. "
6.7.1 Models CPB-N (non verified models)
Operation Display
Switch on balance and during self-check
press the TARE key
Use the numeric keys to enter password:
•Default password "0000"
Should this password entry not be possible,
enter a personal password; (entry using
function [F6 PKn]see. chap.11.1).
Also possible to continue the adjustment
process with button.

CPB-N / CPB-DM-BA-e-1424 15

Press the TARE button, the acceleration
value due to gravity is displayed.
Press the TARE key anew.
„UnLoAd“, followed by „LoAd“ is displayed

Put the adjustment weight (see chap. 1)
carefully in the center of the weighing
plate, „PASS“ will be displayed.
While the balance carries out a self test,
remove the adjustment weight.
After successful adjustment the balance
automatically returns to weighing mode.
In case of an adjustment error or incorrect
adjusting weight the display will show an
error message; repeat adjustment process.


CPB-N / CPB-DM-BA-e-142416

6.7.2 Models CPB-DM (verified models)
The adjustment is locked for verified balances. Carrying out adjustment
requires that the seal is destroyed and the adjusting switch is pressed when
turning on the scale. For position of adjusting switch, see chap. 6.9.1.
Attention:
After destruction of the seal the balance must be re-verified by an
authorised agency and a new verification wire/seal mark fitted before it can
be reused for applications subject to verification.
Operation Indication
Switch-on balance and during the selftest
actuate the adjustment switch and press
the TARE button
Use the number keys to enter password:
either
•Default password "0000"
or
•Personal password, enter under
function [F6 PKn ]see chap.12
Confirm with TARE button

CPB-N / CPB-DM-BA-e-1424 17

TARE button, „UnLoAD“ appears
Press the TARE key anew
„LoAd“ as well as the currently set
adjustment weight appear flashing
either
•Confirm with TARE
or
•In order to change, enter the desired
weight value of the adjustment weight
by the numeric keyboard and confirm
on the TARE button.
In order to achieve high-quality weighing
results in the sense of the measuring
technology, it is recommended to select the
nominal value as high as possible.
We recommend 80 % max.

+
(Example)
Carefully place adjusting weight in the
centre of the weighing plate
Wait for stability display, then press the
TARE button
While the balance carries out a self test,
remove the adjustment weight.
After successful adjustment the balance
automatically returns to weighing mode.
In case of an adjustment error or incorrect
adjusting weight the display will show an
error message; repeat adjustment process.

CPB-N / CPB-DM-BA-e-142418

6.8 Linearization (non-verified models only)
Linearity shows the greatest deviation of a weight display on the scale to the value of
the respective test weight according to plus and minus over the entire weighing
range.
If linearity deviation is discovered during a testing instrument control, you can
improve this by means of linearization.
•Carrying out linearization is restricted to specialist staff possessing well
acquainted with the workings of weighing scales.
•The test weights to be used must be adapted to the weighing scale’s
specifications; see chapter 3.4 “testing instruments control”.
•Observe stable environmental conditions. Stabilisation requires a
certain warm-up time.
•After successful linearization you will have to carry out calibration; see
chapter 3.4 “Testing instruments control”
Tab. 1: Adjustment points
Adjustment
weight
CPB 6K0.1N CPB 15K0.2N CPB 30K0.5N
1.
1 kg
2.5 kg
5 kg
2.
2 kg
5 kg
10 kg
3.
4 kg
10 kg
15 kg
4.
6 kg
15 kg
30 kg
Operation Display
How to carry out linearization:
Switch on balance and during self-check
press the TARE key
Use the numeric keys t
o enter password
„9999“
Confirm with TARE button

CPB-N / CPB-DM-BA-e-1424 19

Press TARE button, the acceleration
value due to gravity is displayed.
Press the TARE key anew
„LoAd 0“ appears, after a short time a signal
will sound and „LoAd 1“ appears
First adjustment weight (s. tab. 1)
after a short time a signal will sound and
„LoAd 2“ appears
Second adjustment weight
after a short time again a signal will sound
and „LoAd 3“ appears.
Third adjustment weight
after a short time again a signal will sound
and „LoAd 4“ appears.
Forth adjustment weight
after a short time again a signal will sound
and „LoAd 3“ appears.
Forth adjustment weight
after a short time a signal will sound and
„LoAd 2“ appears.
Third adjustment weight
after a short time a signal will sound and
„LoAd 1“ appears
(Example)

CPB-N / CPB-DM-BA-e-142420

Second adjustment weight
after a short time a signal will sound and
„LoAd 0“ appears.
First adjustment weight
After successful linearization the balance
automatically returns to weighing mode.
In case of an adjustment error or incorrect adjusting weight the display will show an
error message; repeat linearization process.
CPB-N / CPB-DM-BA-e-1424 21