KERN ECB N Series 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 instruction
Platform scale
KERN ECB_ECE-N
Version 2.4
2017-12
GB
(ECB-N)
ECB_ECE-N-BA-e-1724

ECB_ECE-N-BA-e-1724
2
GB
KERN ECB_ECE-N
Version 2.42017-12
Operating instruction
Platform scale
Table of contents:
1Technical data................................................................................................ 3
2Fundamental information (general).............................................................. 5
2.1 Intended use ............................................................................................................................. 5
2.2 Inappropriate use ..................................................................................................................... 5
2.3 Guarantee.................................................................................................................................. 5
2.4 Monitoring the test substances .............................................................................................. 6
3Fundamental safety information................................................................... 6
3.1 Observe the information in the operating instructions........................................................ 6
3.2 Staff training ............................................................................................................................. 6
4Transport and storage................................................................................... 6
4.1 Acceptance check .................................................................................................................... 6
4.2 Packaging / return transport ................................................................................................... 6
5Unpacking, installation and commissioning............................................... 7
5.1 Place of installation, place of use........................................................................................... 7
5.2 Unpacking the Balance............................................................................................................ 7
5.2.1 Installation .................................................................................................................................. 7
5.2.2 Package volume......................................................................................................................... 8
5.3 Mains supply/Battery operation.............................................................................................. 8
5.3.1 Mains supply (optional)............................................................................................................... 8
5.3.2 Battery operation (standard) / Rechargable Battery (option) ..................................................... 8
5.4 Initial start-up.......................................................................................................................... 10
5.5 Adjustment.............................................................................................................................. 10
5.6 Adjusting................................................................................................................................. 10
6Operation...................................................................................................... 11
6.1 Weighing ................................................................................................................................. 11
6.2 Taring....................................................................................................................................... 11
6.3 Rear illuminated display (only models ECB-N)................................................................... 12
6.4 Dosage und Zero-tracking (only models ECB-N)................................................................ 13
6.5 AUTO-OFF function (only models ECB-N)........................................................................... 14
6.6 Reset function......................................................................................................................... 15
7Maintenance, upkeep, disposal.................................................................. 16
7.1 Cleaning .................................................................................................................................. 16
7.2 Maintenance, upkeep............................................................................................................. 16
7.3 Disposal................................................................................................................................... 16
8Troubleshooting........................................................................................... 16
9Declaration of –Conformity......................................................................... 17

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1 Technical data
Models ECB-N:
KERN ECB 10K-3N ECB 20K-2N ECB 50K-2N
Readout (d) 5 g 10 g 20 g
Weighing range (max) 10 kg 20 kg 50 kg
Taring range (subtractive) 10 kg 20 kg 50 kg
Reproducibility 5 g 10 g 20 g
Linearity ± 20 g ± 40 g ± 80 g
Recommended adjustment
weight, not added (class) 5 kg
(M3) 10 kg (M3) 20 kg (M3)
Stabilisation time (typical) 2 sec.
Operating temperature + 5°C ….+ 35°C
Humidity max. 80 % (non-condensing)
Size (W x D x H) mm 320 x 300 x 60
Stainless steel weighing
plate mm 320 x 260
Weight kg (net) 2,5

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Models ECE-N:
KERN ECE 10K-3N ECE 20K-2N ECE 50K-2N
Readout (d) 5 g 10 g 20 g
Weighing range (max) 10 kg 20 kg 50 kg
Taring range (subtractive) 10 kg 20 kg 50 kg
Reproducibility 5 g 10 g 20 g
Linearity ± 20 g ± 40 g ± 80 g
Recommended adjustment
weight, not added (class) 5 kg
(M3) 10 kg (M3) 20 kg (M3)
Stabilisation time (typical) 2 sec.
Operating temperature + 5°C ….+ 35°C
Humidity max. 80 % (non-condensing)
Size (W x D x H) mm 320 x 300 x 60
Plastic weighing plate mm 320 x 260
Weight kg (net) 2,5

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2 Fundamental information (general)
2.1 Intended use
The balance you have acquired serves to determine the weighing value of the mate-
rial 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. The weighing value can be read off after a stable weighing value has been ob-
tained.
2.2 Inappropriate use
Do not use the 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 drain-
ing fluids from a container on the balance.)
Do not leave a permanent load on the weighing plate. This can damage the measur-
ing equipment.
Be sure to avoid impact shock and overloading the balance in excess of the pre-
scribed maximum load rating (max.), minus any possible tare weight that is already
present. This could cause damage to the balance.
Never operate the balance in hazardous locations. The series design is not explo-
sion-proof.
Structural alterations may not be made to the balance. This can lead to incorrect
weighing results, faults concerning safety regulations as well as to destruction of the
balance.
The balance may only be used in compliance with the described guidelines. Varying
areas of application/planned use must be approved by KERN in writing.
2.3 Guarantee
The guarantee is not valid following
- non-observation of our guidelines in the operating instructions
- use outside the described applications
- alteration to or opening of the device
- mechanical damage and damage caused by media, liquids
- natural wear and tear
- inappropriate erection or electric installation
- overloading of the measuring equipment

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2.4 Monitoring the test substances
The metrology features of the balance and any possible available adjusting weight
must be checked at regular intervals within the scope of quality assurance. For this
purpose, the answerable user must define a suitable interval as well as the nature
and scope of this check. 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. Test weights and balances can be adjusted quickly and at
a reasonable price in KERN’s accredited DKD calibration laboratory (return to na-
tional normal).
3 Fundamental safety information
3.1 Observe the information in the operating instructions
Carefully read this operation manual before setup and com-
missioning, even if you are already familiar with KERN balanc-
es.
3.2 Staff training
The device may only be operated and looked after by trained members of staff.
4 Transport and storage
4.1 Acceptance check
Please check the packaging immediately upon delivery and the device during un-
packing for any visible signs of external damage.
4.2 Packaging / return transport
Keep all parts of the original packaging for a possibly required re-
turn.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Reattach transport securing devices. (see chapter 5.2)
Secure all parts such as the glass wind screen, the weighing plat-
form etc. against shifting and damage.

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5 Unpacking, installation and commissioning
5.1 Place of installation, place of use
The balance is constructed in such a way that reliable weighing results can be
achieved under normal application conditions.
By selecting the correct location for your balance, you will be able to work quickly and
precisely.
Therefore please observe the following at the place of installation:
- 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. In-
admissible bedewing (condensation of air moisture on the device) can occur if
a cold device is taken into a significantly warmer environment. In this case,
please acclimatise the device for approx. 2 hours at room temperature after it
has been disconnected from the mains.
- Avoid static charging of the material to be weighed, weighing container and
windshield.
Major display deviations (incorrect weighing results) are possible if electromagnetic
fields occur as well as due to static charging and instable power supply. It is then ne-
cessary to change the location.
5.2 Unpacking the Balance
Carefully remove the balance from the packaging and out of the plastic covering,
then place the balance on the assigned position.
5.2.1 Installation
Install the balance in such a fashion that the weighing plate is absolutely horizontal.

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5.2.2 Package volume
Serial fittings:
KERN ECB_ECE-N
•Balance with
•weighing plate stainless steel (ECB-N)
•weighing plate plastic (ECE-N)
•User manual
5.3 Mains supply/Battery operation
5.3.1 Mains supply (optional)
Electric power supply is by means of the external mains supply circuit. The printed
voltage level must comply with the local voltage.
Only use original KERN mains supply circuits. The use of other makes is subject to
approval by Kern.
Mains adapter output voltage: 9V DC (polarity: inner terminal is negative)
5.3.2 Battery operation (standard) / Rechargable Battery (option)
Open the battery cover on the underside of the balance. Insert 6 x 1.5volt (AA) batte-
ries.
Replace the battery cover. To preserve battery life, the balance switches off
automatically after 3 minutes if no weighing has taken place.
For battery operation the balance has an automatic switchoff function which can be
activated and deactivated in the menu (chap. 6.5).
When the battery power is used up the display will show “LO“. Press the ON/OFF key
and change the batteries at once.
When the balance is not in use for a longer period of time remove batteries and keep
them separately. Leakage of battery liquid might damage the balance.
The optionally supplied battery is charged with the optionally supplied power
supply.
The battery has a service life of c. 100 hours.
The charging period for total charge is c. 10 hours.

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Rechargeable Battery Installation:
1. Remove battery cover
2. Slide spacer to left or right, lever down on corner, then remove the
spacer
3. Insert and connect rechargeable battery

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5.4 Initial start-up
A warm-up time of 5 minutes stabilises the measured values after switching on.
The accuracy of the balance depends on the local acceleration of the fall.
Please be sure to observe the information in the chapter on adjusting.
5.5 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 during the initial start-up, after change in lo-
cation and variation of surrounding temperature. It is also recommendable to adjust
the balance periodically during weighing operation in order to obtain exact measured
values.
5.6 Adjusting
Using a precision weight, the accuracy of the balance can be checked at any time
and adjusted.
Adjustment procedure:
Check that the surrounding conditions are stable.
A short warm-up time of about 5 minutes is recommended for stabilisation.
Operation
Display
Turn on balance by pressing the ON/OFF key
Keep the TARE key pressed for 3 seconds
„CAL“ – followed by the adjustment weight will be adjusted.
(example)
Place the required adjustment weight on the centre of the
weighing plate (see chap. 1 „Technical Data“)
Short time later appears:
After that the balance will switch off automatically.
Adjustment has now been completed successfully.
Remove the weighed good.
An error during adjustment or the use of an incorrect adjusting weight will result in
an error message „E“.
In this case repeat the adjustment.