KERN FOB 500-1S User manual

KERN & Sohn GmbH
Ziegelei 1
Phone: +49-[0]7433- 9933-0
D-72336 Balingen
Fax: +49-[0]7433-9933-149
E-Mail: [email protected]
Internet: www.kern-sohn.com
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KERN FOB-S
Version 1.2
08/2013
GB
FOB-S-BA-e-1312

GB
KERN FOB-S
Version 1.2 08/2013
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
5.2.3 Assembly/disassembly of the operating cover........................................................................... 7
5.3 Mains connection (optional)........................................................................................................ 8
5.4 Battery operation........................................................................................................................ 8
5.5 Initial Commissioning.................................................................................................................. 9
5.6 Adjustment.................................................................................................................................. 9
5.7 Adjustment.................................................................................................................................. 9
6 Operating elements ..................................................................................... 11
6.1 Keyboard overview................................................................................................................... 11
6.2 Overview of display .................................................................................................................. 11
7 Operation...................................................................................................... 12
7.1 Simple weighing ....................................................................................................................... 12
7.2 Taring........................................................................................................................................ 12
7.3 Weighing units switch-over....................................................................................................... 13
8 The menu...................................................................................................... 13
8.1 Call up menu ............................................................................................................................ 13
8.2 Navigation in the menu............................................................................................................. 13
8.3 Menu overview ......................................................................................................................... 13
8.4 Menu settings ........................................................................................................................... 14
8.4.1 Setting weighing units............................................................................................................... 14
8.4.2 Automatic switch-off function „AUTO OFF“ in stand-by mode................................................. 15
9 Error messages............................................................................................ 17
10 Service, maintenance, disposal.................................................................. 17
10.1 Cleaning.................................................................................................................................... 17
10.2 Service, maintenance............................................................................................................... 17
10.3 Disposal.................................................................................................................................... 17
11 Instant help................................................................................................... 18
FOB-S-BA-e-1312 2

1 Technical data
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
3 FOB-S-BA-e-1312

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-1312 4

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
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.
5 FOB-S-BA-e-1312

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-1312 6

5.2.1 Placing
The balance must be installed in a way that the weighing plate is exactly in horizontal
position.
5.2.2 Scope of delivery
Serial accessories:
Balance
Weighing pan
Mains adapter (optional)
Protective working cover
Operating instructions
5.2.3 Assembly/disassembly of the operating cover
Unblock the plate of the scales by
turning it in the direction indicated
by the arrow.
Remove/put on the operating
cover
7 FOB-S-BA-e-1312

5.3 Mains connection (optional)
The balance may be operated via the optional 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.
5.4 Battery operation
Remove battery cover at the lower side of the casing. Insert 9 V block. Reinsert the
battery cover.
In the menu you can activate the AUTO-OFF function (see chap. 8.4.2 “Automatic
switch-off function“). According to the selected settings, the balance switches
automatically off in order to spare the battery.
and
replace the batteries immediately.
If the balance is not used for a longer time, take out the battery and store it
separately. Leaking battery liquid could damage the balance.
The empty battery is indicated on the display by „LobAt“. Press button
FOB-S-BA-e-1312 8

5.5 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap. 1). During this
warming up time the balance must be connected to the power supply (mains or
battery).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
5.6 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.
5.7 Adjustment
The adjustment should be made with the recommended adjustment weights (see
chap. 1 "Technical data").
9 FOB-S-BA-e-1312









Procedure when adjusting:
Observe stable environmental conditions.
A warming up time (see chapter 1; Technical Data) is required for stabilization.
Ensure that there are no objects on the weighing plate.
Balance display
Operation
Start balance by pressing
The balance carries out an autotest and changes
then into the weighing mode, the zero display „0.0“
appears



Press for approx. 3 seconds, „CAL“ appears
shortly, then „CAL 0“ and after that „LoAd“ is
displayed alternately with the value of the first
adjustment weight.
Place the first adjustment weight in the middle of the
weighing plate.
(example)

(example)
After a short time the value of the second
adjustment weight is displayed alternately with
„LoAd“
Remove the the first adjustment weight from the
weighing plate and place the second adjustment
weight in the middle of the weighing plate.
Adjustment occurs automatically after standstill
control.
„donE“ will be shortly displayed. Then the value of
the second adjustment weight will be displayed.
Adjustment process has been finished successfully.
The balance is now in weighing mode.
FOB-S-BA-e-1312 10