KERN FFN-N User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: [email protected]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instructions
Compact balance
KERN FFN-N
Version 2.3
08/2013
GB
FFN-N-BA-e-1323

FFN-N-BA-e-1323 2
GB
KERN FFN-N
Version 2.3 08/2013
Operating instructions
Compact balance
Table of Contents
1Technical Data ................................................................................................ 4
1.1 Dimensions.................................................................................................................................. 6
2Appliance Overview........................................................................................ 7
2.1 Overview of displays.................................................................................................................... 7
2.1.1 Not verifiable models............................................................................................................... 7
2.1.2 Verifiable models..................................................................................................................... 7
2.2 Keyboard Overview..................................................................................................................... 9
3Basic Information ......................................................................................... 10
3.1 Proper use................................................................................................................................. 10
3.2 Improper use.............................................................................................................................. 10
3.3 Warranty.................................................................................................................................... 10
3.4 Monitoring of Test Resources.................................................................................................... 10
4Basic Safety Precautions............................................................................. 11
4.1 Pay attention to the instructions oft the Operation Manual ....................................................... 11
4.2 Personnel training...................................................................................................................... 11
5Transportation & 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 and implantation...................................................................................................... 13
6.2.1 Scope of supply..................................................................................................................... 15
6.3 Battery power supply................................................................................................................. 15
6.3.1 Mains connection during rechargeable battery operation ..................................................... 17
6.4 Initial Commissioning................................................................................................................. 18
6.5 Protection type IP65 .................................................................................................................. 18
7Adjustment.................................................................................................... 18
7.1 Adjustment................................................................................................................................. 18
7.1.1 Adjusting non-verifiable models............................................................................................. 19
7.1.2 Adjusting verifiable models.................................................................................................... 20
7.2 Verification................................................................................................................................. 21
7.2.1 Adjustment switch and seals................................................................................................. 22

3 FFN-N-BA-e-1323
8Operation....................................................................................................... 23
8.1 Weighing.................................................................................................................................... 23
8.2 Taring......................................................................................................................................... 23
8.3 Weighing units switch-over........................................................................................................ 24
8.4 Background illumination ............................................................................................................ 24
9The menu....................................................................................................... 25
9.1 Navigation in the menu.............................................................................................................. 25
9.2 Menu overview........................................................................................................................... 26
9.3 Set auto-OFF function ............................................................................................................... 27
9.4 Setting the Multi-Tare function................................................................................................... 28
10 Error messages............................................................................................. 29
11 Instant Help................................................................................................... 30
12 Service, maintenance, disposal................................................................... 31
12.1 Cleaning..................................................................................................................................... 31
12.2 Service, maintenance................................................................................................................ 31
12.3 Disposal..................................................................................................................................... 31
13 Declaration of –Conformity.......................................................................... 32

FFN-N-BA-e-1323 4
1 Technical Data
KERN
FFN
1K-4N
FFN
3K0.5IPN
FFN
6K1IPN
FFN
15K2IPN
FFN
25K5IPN
Weighing range (max)
1,5 kg
3 kg
6 kg
15 kg
25 kg
Readability (d)
0,2 g
0,5 g
1 g
2 g
5 g
Reproducibility
0,2 g
0,5 g
1 g
2 g
5 g
Linearity
0,4 g
1 g
1 g
4 g
10 g
Recommended adjustment
weight, not added (class)
1,5 kg
(M3)
3 kg
(M3)
6 kg
(M3)
15 kg
(M3)
25 kg
(M3)
Stabilization time (typical)
2 sec.
Units
kg, lb
Warm-up time
30 min.
Electric Supply
Supply voltage: 110V-230V AC
Mains adapter: 12 V, 500 mA
Battery power supply
Operating period: Background lighting on: 30 h
Background lighting off: 50 h
Loading time: 12 h
Auto-off (Rechargeable
battery)
15 min., 5 min., 3 min., off
Display mode
LCD, digit size 25 mm
Operating temperature
0° C …. + 40° C
Humidity of air
25 % - 95 % (non-condensing)
Weighing plate dimensions
(stainless steel) (mm)
230 x 190
Casing dimensions
230 x 300 x 130
Total dimensions mounted
(mm)
230 x 300 x 130
Weight kg (net)
3,2
IP protection
IP65
(Only during operation on battery power)

5 FFN-N-BA-e-1323
KERN
FFN
1K-4NM
FFN
3K1IPM
FFN
6K2IPM
FFN
15K5IPM
FFN
25K10IPM
Weighing range (max)
1,5 kg
3 kg
6 kg
15 kg
25 kg
Readability (d)
0,5 g
1 g
2 g
5 g
10 g
Minimum weight
10 g
20 g
40 g
100 g
200 g
Verification values (e)
1 g
1 g
2 g
5 g
10 g
Accuracy class
III
III
III
III
III
Reproducibility
1 g
1 g
2 g
5 g
10 g
Linearity
1 g
1 g
2 g
5 g
10 g
Recommended adjustment
weight, not added (class)
1,5 kg
(M1)
3 kg
(M3)
6 kg
(M3)
15 kg
(M3)
25 kg
(M3)
Stabilization time (typical)
2 sec.
Units
kg, g
Anwärmzeit
10 min.
Electric Supply
Supply voltage: 110V-230V AC
Mains adapter: 12 V, 500 mA
Battery power supply
Operating period: Background lighting on: 30 h
Background lighting off: 50 h
Loading time: 12 h
Auto-off (Rechargeable
battery)
15 min., 5 min., 3 min., off
Display mode
LCD, digit size 25 mm
Operating temperature
-10° C …. + 40° C
Humidity of air
25 % - 95 % (non-condensing)
Weighing plate dimensions
(stainless steel) (mm)
230 x 190
Casing dimensions
230 x 300 x 130
Total dimensions mounted
(mm)
230 x 300 x 130
Weight kg (net)
3,2
IP protection
IP65
(Only during operation on battery power)

FFN-N-BA-e-1323 6
1.1 Dimensions

7 FFN-N-BA-e-1323
2 Appliance Overview
2.1 Overview of displays
2.1.1 Not verifiable models
2.1.2 Verifiable models

FFN-N-BA-e-1323 8
Display
Designation
Description
Zeroing display
Should the balance not display exactly zero
despite empty scale pan, press the
button. Will be reset to zero after short waiting
time.
Stability display
Scales are in a steady state
Net weight display
Net weight will be displayed
Capacity display
Rechargeable battery
Rechargeable battery almost empty, please
connect power pack
Power supply connected
Icon is glowing for power supply via power pack
Display weighing unit kg
Displayed weight in kg
(only in not
verifiable
units)
Display weighing unit lb
Displayed weight in lb
(only in
verifiable
units)
Display weighing unit g
Displayed weight in g

9 FFN-N-BA-e-1323
2.2 Keyboard Overview
Button
Designation
Function
in the menu
ON/OFF-switch
Turn on/off
TARE button
Tare balance
Call up menu
Change to the next
menu item /parameter
Zero setting key
Balance set at zero
Select menu item /
parameter
+
TARE + ZERO-key
Change units

FFN-N-BA-e-1323 10
3 Basic Information
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“ in the balance. (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
damaged 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
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.

11 FFN-N-BA-e-1323
4 Basic Safety Precautions
4.1 Pay attention to the instructions oft 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 Transportation & 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 glass wind screen, weighing platform, power
unit etc. against shifting and damage.

FFN-N-BA-e-1323 12
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 scales on a stable, even 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, vapors 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.

13 FFN-N-BA-e-1323
6.2 Unpacking and implantation
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
2
1
3
5
4
6
7
8
9
1
Weighing plate
2
Locking screw
3
Carrier weighing plate
4
Display
5
Bubble level
6
Keyboard
7
Footscrews
8
Rechargeable battery compartment cover
9
Screws of battery compartment cover

FFN-N-BA-e-1323 14
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
Pressure compensation screw:
[1]
On the lower side of the balance there is a pressure compensation screw [1]
which has to be opened for the weighing process. Fasten the screw before
cleaning the balance.
Mains connection
Battery compartment
Pressure compensation
screw

15 FFN-N-BA-e-1323
6.2.1 Scope of supply
Serial accessories:
Balance
Weighing plate
Carrier weighing plate
Fastening screw of the carrier weighing plate
Operating instructions
Rechargeable battery
Hexagonal socket wrench
6.3 Battery power supply
The rechargeable battery is charged via the delivered power supply.
The operating time of the rechargeable battery with background illumination is 30h,
without that it is 50 hrs. Charging time until complete recharging 12h.
In the menu you can activate the AUTO-OFF function time off], see chap. 9.3.
According to menu settings, the balance switches automatically off in order to spare
the battery.
Insert rechargeable battery:
Remove any adherent moisture from
the balance
Move both levers 90° to the left
Membrane for degree of
protection IP65

FFN-N-BA-e-1323 16
Remove the rechargeable battery
cover
Connecting the rechargeable battery
Watch the colours:
Red on red !
Black on black!
Insert the rechargeable battery in a
manner that it cannot slip (fasten with
a rubber mat)
Ensure that the cables are not
squeezed.

17 FFN-N-BA-e-1323
Close the rechargeable battery cover
Move both levers 90° to the right
If in the display the triangle appears above the capacity display , the
rechargeable battery is nearly exhausted. Connect power pack, the rechargeable
battery is loaded.
Avoid excess pressure on the balance in order to avoid damaging
them, particularly as they are supported by the weighing plate.
6.3.1 Mains connection during rechargeable battery operation
During the rechargeable battery operation ensure that the mains
connection is covered with a rubber cap.
Only by this the type of protection IP65 is ensured.

FFN-N-BA-e-1323 18
6.4 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).
The weighing scale must be connected to the power supply (batteries) during this
warm-up time.
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
6.5 Protection type IP65
Designed for temporary contact with liquids. Use a damp cloth for cleaning.
Dustproof.
IP65 protection is only ensured during operation on battery
power
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.
7.1 Adjustment
Carry out adjustment as near as possible to the maximum load of the scale (See
chpt. 1 “Techn. data”). The accuracy of the weight used for adjustment has to
correspond approximately to readability dof the scale, or rather closer than that.
Info about test weights can be found on the Internet at: http://www.kern-sohn.com
Procedure when adjusting:
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.

19 FFN-N-BA-e-1323
7.1.1 Adjusting non-verifiable models
Display
Operation
Start balance by pressing
Whilst the weighing scale is carrying out a self-test,
(00…- 99…) press and hold until the message “F1
CAL“ appears.
Press ,
in the display appears „UnLod“.
(Example)
Press again
the weight value will be displayed.
Enter value for adjustment weight (See chpt 1) by
Position weight
Press
Remove weight whilst scale is carrying out self-test
Weighing scale changes to zero display.
This completes the adjustment process.

FFN-N-BA-e-1323 20
7.1.2 Adjusting verifiable models
The adjustment is locked for verified balances.
with adjustment switch
To disable the access lock, destroy the seal and actuate the adjustment
switch. Position of the adjustment switch see chapter 7.2.1
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.
Display
Operation
Start balance by pressing
While the balance carries out a self test (00…- 99…), press
and keep pressed until „F1 CAL“ appears on the
display.
Actuate the adjustment switch on the lower side of the
balance
Press
in the display appears „UnLod“.
(Beispiel)
Press anew
The weighing value is displayed.
Press to enter the value of the adjustment weight
(see chapter 1)
Place the adjustment weight
Press
While the balance carries out a self-test, take away the
adjustment weight
The balance changes over to zero display.
Now the process of adjustment is completed.