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
Compact balance
KERN FOB-S
Version 1.1
07/2013
GB
FOB-S-BA-e-1311
GB
KERN FOB-S
Version 1.1 07/2013
Operating instructions
Compact balance
Contents
1 Technical data ................................................................................................ 3
2 Basic Information (General) .......................................................................... 4
2.1 Proper use .................................................................................................................................. 4
2.2 Improper Use .............................................................................................................................. 4
2.3 Warranty ..................................................................................................................................... 4
2.4 Monitoring of Test Resources..................................................................................................... 5
3 Basic Safety Precautions .............................................................................. 5
3.1 Pay attention to the instructions in the Operation Manual .......................................................... 5
3.2 Personnel training ....................................................................................................................... 5
4 Transport and storage ................................................................................... 5
4.1 Testing upon acceptance ........................................................................................................... 5
4.2 Packaging / Return transport ...................................................................................................... 5
5 Unpacking, Setup and Commissioning ....................................................... 6
5.1 Installation Site, Location of Use ................................................................................................ 6
5.2 Unpacking ................................................................................................................................... 6
5.2.1 Placing ........................................................................................................................................ 7
5.2.2 Scope of delivery ........................................................................................................................ 7
5.3 Mains connection (optional)........................................................................................................ 7
5.4 Battery operation ........................................................................................................................ 7
5.5 Initial Commissioning .................................................................................................................. 8
5.6 Adjustment .................................................................................................................................. 8
5.7 Adjustment .................................................................................................................................. 8
6 Operating elements ..................................................................................... 10
6.1 Keyboard overview ................................................................................................................... 10
6.2 Overview of display .................................................................................................................. 10
7 Operation ...................................................................................................... 11
7.1 Simple weighing ....................................................................................................................... 11
7.2 Taring ........................................................................................................................................ 11
7.3 Weighing units switch-over ....................................................................................................... 12
8 The menu ...................................................................................................... 12
8.1 Call up menu ............................................................................................................................ 12
8.2 Navigation in the menu ............................................................................................................. 12
8.3 Menu overview ......................................................................................................................... 12
8.4 Menu settings ........................................................................................................................... 13
8.4.1 Setting weighing units ............................................................................................................... 13
8.4.2 Automatic switch-off function „AUTO OFF“ in stand-by mode ............................................... 14
9 Error messages ............................................................................................ 16
10 Service, maintenance, disposal .................................................................. 16
10.1 Cleaning.................................................................................................................................... 16
10.2 Service, maintenance ............................................................................................................... 16
10.3 Disposal .................................................................................................................................... 16
11 Instant help ................................................................................................... 17
FOB-S-BA-e-1311 2
KERN
FOB 500-1S
FOB 5K1S
Readability (d)
0.1 g
1 g
Weighing range (max)
500 g
5,000 g
Reproducibility
0.1g
1 g
Linearity
± 0.2 g
± 2 g
Weighing Units
g, lb, oz, dwt, ozt
Recommended adjustment
weight, not added (class)
200 g /
500 g (M1)
2,000 g /
5,000 g (M1)
Warm-up time
10 min
Stabilization time (typical)
2 sec.
Operating temperature
+ 10° C .... + 40° C
Humidity of air
25% - 95% (non-condensing)
Housing (B x D x H) mm
170 x 150 x 40
Weighing plate, stainless steel
(mm)
120 x 150
Weight kg (net)
650 g
Auto off
2 min
Battery
9 V block
Secondary voltage powerpack
9 V / 100 mA
1 Technical data
3 FOB-S-BA-e-1311
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 balcance”, i.e. the
material to be weighed is manually and carefully placed in the centre of the weighing
pan.. 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 weighings. 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 pan. 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
FOB-S-BA-e-1311 4
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.
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.
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.
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
5 FOB-S-BA-e-1311
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.
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.
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.
5.2 Unpacking
Carefully remove the weighing balance from the packaging and install it at the
designated work place.
FOB-S-BA-e-1311 6
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