KERN FOB 1K1M 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
Compact balance
KERN
FOB
Version 1.9
05/2016
GB
FOB-BA-e-1619

FOB-BA-e-1619
2
GB
KERN FOB
Version 1.905/2016
Operation instruction
Compact balance
Tabel of contents:
1Technical data................................................................................................ 4
1.1 Verifiable models...................................................................................................................... 4
1.2 Non verifiable models.............................................................................................................. 6
2Fundamental information (general).............................................................. 8
2.1 Intended use ............................................................................................................................. 8
2.2 Inappropriate use ..................................................................................................................... 8
2.3 Guarantee.................................................................................................................................. 8
2.4 Monitoring the test substances .............................................................................................. 9
3Fundamental safety information................................................................... 9
3.1 Observe the information in the operating instructions........................................................ 9
3.2 Staff training ............................................................................................................................. 9
4Transport and storage................................................................................... 9
4.1 Acceptance check .................................................................................................................... 9
4.2 Packaging / return transport ................................................................................................... 9
5Unpacking, installation and commissioning............................................. 10
5.1 Place of installation, place of use......................................................................................... 10
5.2 Installation............................................................................................................................... 11
5.2.1 List of items supplied................................................................................................................ 11
5.3 Mains supply........................................................................................................................... 11
5.4 Rechargeable battery operation (optional).......................................................................... 11
5.5 Initial start-up.......................................................................................................................... 11
5.6 Adjustment.............................................................................................................................. 12
5.7 Adjusting................................................................................................................................. 12
5.7.1 Verifiable Models FOB 1K1M, FOB 2K2M, FOB 5K5M............................................................ 12
5.7.2 Verifiable Models FOB 6K2LM, FOB 15K5LM, FOB 30K10LM................................................ 12
5.7.3 Non-verifiable Models............................................................................................................... 13
5.7.4 Check software settings for verification of a balance ............................................................... 13
5.7.5 Position adjust switch ............................................................................................................... 15
5.8 Verification.............................................................................................................................. 15
5.8.1 Position of the „security marks“................................................................................................ 16

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6Operation...................................................................................................... 17
6.1 Overview of display................................................................................................................ 17
6.1.1 Verifiable models...................................................................................................................... 17
6.1.2 Non-verifiable models............................................................................................................... 17
6.2 Weighing ................................................................................................................................. 18
6.3 Taring ( key) ..................................................................................................................... 18
6.4 Zeroing the balance ( ->verifiable balances)................................................................. 18
6.5 Plus/minus weighings............................................................................................................ 19
6.6 Net/gross weighings .............................................................................................................. 19
6.7 Auto OFF mode....................................................................................................................... 19
6.8 Unit change............................................................................................................................. 19
7Maintenance, upkeep, disposal.................................................................. 20
7.1 Cleaning................................................................................................................................... 20
7.2 Maintenance, upkeep............................................................................................................. 20
7.3 Disposal................................................................................................................................... 20
8Troubleshooting........................................................................................... 21
9Declaration of Conformity........................................................................... 22

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1 Technical data
1.1 Verifiable models
KERN FOB 1K1M FOB 2K2M FOB 5K5M
Readout (d) 1 g 2 g 5 g
Weighing range 1kg 2 kg 5 kg
Taring range (subtractive) 1kg 2 kg 5 kg
Adjustmentweight
(not included) (class) 1000g (M1) 2000 g (M3) 5000 g (M3)
Stabilization time 2 sec.
Operating temperature 0° C .... + 40° C
Air humidity 25 - 95 % (non-condensing)
Case (W x D x H) mm 175 x 235 x 60
Weighing plate (W x D)mm 175 x 160
Weight kg (net) 1,95
Rechargeable battery
(Option) 7.2 V; 1200 mAh; Working life approx. 24 h / Loading time approx. 8h
Mains adapter 15V/500mA

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KERN FOB 6K2LM FOB 15K5LM FOB 30K10LM
Readout (d) 2 g 1 g 2 g
Weighing range (Max) 6 kg 15 kg 30 kg
Taring range (subtractive) 6 kg 15 kg 30 kg
Reproduzierbarkeit 2 g 5 g 10 g
Linearität ± 4 g ± 10 g ± 20 g
Adjustmentweight
(not included) (class) 5 kg (M3) 10 kg (M3) 20 kg (M3)
Stabilization time 2 sec.
Operating temperature -10° C .... + 40° C
Air humidity 25- 95 % (non-condensing)
Case (W x D x H) mm 220 x 305 x 80
Weighing plate (W x D)mm 215 x 215
Weight kg (net) 3,3
Rechargeable battery
(Option) 7.2 V; 1200 mAh; Working life approx. 24 h / Loading time approx. 8h
Mains adapter 15V/500mA

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1.2 Non verifiable models
KERN
FOB 1.5K0.5 FOB 3K1 FOB 6K2
Readout (d) 0,5 g 1 g 2 g
Weighing range 1,5 kg 3 kg 6 kg
Taring range (subtractive) 1,5 kg 3 kg 6 kg
Reproducibility 0,5 g 1 g 2 g
Linearity ± 1 g ± 2 g ± 4 g
Adjustmentweight
(not included) (class)
1000 g (M2) 2.000 g (M3) 5.000 g (M2)
Stabilization time 2 sec.
Operating temperature 0° C .... + 40° C
Air humidity 25 - 95 % (non-condensing)
Case (W x D x H) mm 175 x 235 x 60
Weighing plate (W x D)mm 175 x 160
Weight kg (net) 1,95
Rechargeable battery
(Option) 7.2 V; 1200 mAh; Working life approx. 24 h / Loading time approx. 8h
Mains adapter 15V/500mA

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KERN
FOB 7.5K0.5L FOB 15K1L FOB 30K2L
Readout (d) 0,5 g 1 g 2 g
Weighing range 7,5 kg 15 kg 30 kg
Taring range (subtractive) 7,5 kg 15 kg 30 kg
Reproduzierbarkeit 0,5 g 1 g 2 g
Linearität ± 1,5 g ± 3 g ± 6 g
Adjustmentweight
(not included) (class) 5 kg (M1) 10 kg (M1) 20 kg (M1)
Stabilization time 2 sec.
Operating temperature 0° C .... + 40° C
Air humidity 25- 95 % (non-condensing)
Case (W x D x H) mm 220 x 305 x 80
Weighing plate (W x D)mm 215 x 215
Weight kg (net) 3,3
Rechargeable battery
(Option) 7.2 V; 2000 mAh; Working life approx. 30 h / Loading time approx. 14h
Mains adapter 15V/500mA

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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
obtained.
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
Please read the operating instructions carefully before erecting and commissioning,
even if you already have experience with KERN balances.
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 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 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
necessary to change the location.