KERN 20K10 User manual

GB Operating Instructions Hanging scale
1 Technical data
KERN 20K10 20K50 50K20 50K100
Readability 10 g 50 g 20 g 100 g
Weighing
range 20 kg 20 kg 50 kg 50kg
KERN 99K50 100K200 200K100 200K500
Readability 50 g 200 g 100 g 500 g
Weighing
range 99 kg 100 kg 200 kg 200 kg
2 Basic instructions
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“ balance, i.e. the material to be
weighed is manually and carefully suspended. 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“ in the balance. (Example: Slowly drain-
ing fluids from a container suspended on the balance.) No
permanent load must remain on the balance. This may dam-
age 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 (danger
of breaking).
Caution:
ÖMake sure that never persons or objects are under the
load which could be injuried or damaged!
ÖThe balance is not suitable for weighing persons!
ÖThe balance does not correspond to the law of medical
products (MPG).
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 electri-
cally connected
•The measuring system is overloaded
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. Informa-
tion 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 cali-
brated (return to the national standard) fast and at moderate
cost.
3 Basic Safety Precautions
ÖDo not use the suspended balance for conveying loads
ÖNever exceed the maximum permitted load (!!Danger of
breaking!!).
ÖAlways ensure that there are no persons, animals or
objects that might be damaged underneath the load.
ÖAvoid any kind of shock, torsion and oscillating (e.g.
caused by inclined suspending)
No No OK
Do not use
under pressure Do not twist Only apply under
tensile force
3.1 Pay attention to the instructions in the Operation Man-
ual
Carefully read this operation manual before 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.
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4 Transport and storage
4.1 Testing upon acceptance
When receiving the appliance, please check packaging imme-
diately, and the appliance itself when unpacking for possible
visible damage.
4.2 Packaging
Keep all parts of the original packaging in case you need to
return the appliance.
Only use original packaging for returning.
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:
•Avoid extreme heat as well as temperature fluctuation
caused by using 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 (condensa-
tion of air humidity on the appliance) may occur if a cold
appliance is taken to a considerably warmer environment.
In this case, acclimatize the appliance for ca. 2 hours at
room temperature.
•Avoid static charging of the material to be weighed, weigh-
ing container and windshield.
If electro-magnetic fields or static charge occur, or if the power
supply is unstable major deviations on the display (incorrect
weighing results) are possible. In that case, the location must
be changed.
5.2 Unpacking
Take the balance carefully out of the package and remove
the plastic cover.
5.3 Scope of delivery
•Suspended balance
•Batteries
•Operating Manual
5.4 Battery operation
Push out the battery cover on the balance backside. Insert 3
AA batteries. Reinsert the battery cover. If the batteries are
empty, in the balance display appears “LO”. Press ON/OFF-
key and replace the batteries immediately. In order to save the
battery, the balance switches automatically off after 4 minutes
without weighing. Deactivate this Auto-OFF function in the
menu as follows:
5.5 The menu
ÖWhen the balance is switched off, press the HOLD-key
and keep it pressed
ÖDo not release the HOLD-key. Press also the
ON/OFF/TARE-key and keep it pressed
ÖKeep the ON/OFF/TARE-key pressed, however release
the HOLD-key
ÖPress HOLD-key anew
ÖKeep both keys pressed until in the display “tr” appears
ÖRelease both keys. The balance is situated in the menu.
ÖUsing the ON/OFF/TARE button you can select between
the following functions:
tr (zero tracking) : ON/OFF
AF (Auto off): ON/OFF
rST (Reset to factory setting): YES/NO
ÖConfirm with HOLD-key
ÖIn the display appears the current setting „ON“ or „OFF“
resp. „YES“ or „NO“.With help of the ON/OFF/TARE-key
you can select between „ON“ or „OFF“ resp. „YES“ or
„NO“. Confirm your selection with the HOLD-key. After a
short period the balance returns automatically to weighing
mode.
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 loca-
tion in the factory). This adjustment process must be carried
out during the initial start-up, after change in location and varia-
tion of surrounding temperature. To receive accurate measur-
ing values it is also recommended to adjust the balance peri-
odically in weighing operation.
6.1 Adjustment
With an adjustment weight, the weighing accuracy can be
checked and re-adjusted at any time.
Procedure when adjusting:
Observe stable environmental conditions. A short warming up
time of ca. 1 minute is recommended for stabilization. Switch
on balance Press the Unit-key and keep it pressed (approx. 3
sec), in the display first appears shortly „CAL “, after that there
appears the exact size of the adjustment weight. Suspend the
adjustment weight, a short time later appears „ F“, the balance
returns automatically to the weighing mode.
In case of an adjustment error or incorrect adjusting weight the
display will show "E"; repeat adjustment process.
KERN 20K10 20K50 50K20 50K100
Adjustment
weight
(not added) 10 kg
(M3) 10 kg (M3) 20 kg (M3) 20 kg (M3)
KERN 99K50 100K200 200K100 200K500
Adjustment
weight
(not added) 50 kg
(M3) 50 kg (M3) 100 kg (M3) 100 kg (M3)
7 Operation
7.1 Weighing
•The balance is switched on by pressing the „ON/OFF/TARE“
key.
•The balance displays „0.0“.
•Suspend material to be weighed.
•The weighing value appears in the display:
•If the material to be weighed is heavier than the weighing
range, the display will show "E" (=Overload).
•The balance is switched off by pressing the „ON/OFF“ key a
longer time.
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7.2 Weighing units switch-over
Using the Unit-key you can switch over the display between N,
lb and kg. The Xmarks the active setting.
7.3 Taring
•Switch on the balance using the ON/OFF/TARE-key and wait
for the „0“ display. Suspend the tare load and press the
ON/OFF/TARE -key.
•The balance display jumps to „0.0“. The weight of the tare
load is internally stored. The material to be weighed can now
be filled in the tare vessel and the weighing value can be
read.
7.4 Functions
With help of the Hold-key the following functions can be acti-
vated:
Setting Function
H1 Data-Hold function 1
Weighing value frozen for 5 sec. after press-
ing the Hold-key
H2 Data-Hold function 2
The weighing value will be frozen after press-
ing the Hold-key until another key is actuated
H3 Data-Hold function 3
The weighing value is automatically frozen
for 5 sec.
H4 Data-Hold function 4
The weighing value is automatically frozen
after reaching a stable value until a key will
be actuated
H5 Animal weighing function
H6 Peak value function
7.4.1 Data-Hold function
With the Data-Hold function the weighing values in the display
can be fixly displayed for a longer time. According to the using
range you can select between 4 settings (H1 – H4).
ÖSwitch on the balance, keep the HOLD-key pressed until
the current setting „Hx“ (H1 – H6) appears.
ÖActuate the ON/OFF/TARE-key until the desired setting
(H1-H4) appears.
ÖUse the HOLD-key to confirm your selection
ÖSuspend the material to be weighed
ÖThe weighing value is displayed depending on your set-
tings (H1 – H4) (see table chap. 7.4), symbolised by the
[S] top left.
7.4.2 Animal weighing function
This function is suitable for busy weighing procedures. The
result is a mean value formed by 16 weighing values which is
found out within 3 seconds.
ÖSwitch on the balance, keep the HOLD-key pressed until
the current setting „Hx“ (H1 – H6) appears.
ÖPress the ON/OFF/TARE-key until „H5“ appears.
ÖUse the HOLD-key to confirm your selection
ÖSuspend the material to be weighed
ÖPress the HOLD-key, the display counts reverse from
3 -1. The calculated mean value is indicated, symbolised
by the [S] top left.
ÖFor further measurements press the ON/OFF/TARE-key
before
7.4.3 Peak value function
This function displays the highest load value (peak value) of a
weighing.
Measuring frequency: 200ms
Caution:
Never exceed the maximum permitted load of the
peak value on the balance (!!Danger of breaking!!).
ÖSwitch on the balance, keep the HOLD-key pressed until
the current setting „Hx“ (H1 – H6) appears.
ÖPress the ON/OFF/TARE-key until „H6“ appears.
ÖUse the HOLD-key to confirm your selection
ÖSuspend the material to be weighed
ÖThe peak value appears for a short time, symbolised by
the [S] top left. The balance returns automatically to zero
and is ready for further measurement.
8 Service, maintenance, disposal
8.1 Cleaning
Please do not use aggressive cleaning agents (solvents or
similar agents), but a cloth dampened with mild soap suds.
Ensure that no liquid penetrates into the device and wipe with a
dry soft cloth.
8.2 Service, maintenance
The appliance may only be opened by trained service techni-
cians who are authorized by KERN.
8.3 Disposal
Disposal of packaging and appliance must be carried out by
operator according to valid national or regional law of the loca-
tion where the appliance is used.
9 Instant help
In case of a fault in the program sequence, the balance should
be shortly switched off. The weighing process must then be
restarted from the beginning.
Fault Possible cause
•The balance is not switched on.
Display weight
does not glow. •Batteries are inserted incorrectly or empty
•No batteries inserted.
•Draught/air movement
Displayed
weight is per-
manently
changing
•Vibrations on the supension of the balance
•
Electromagnetic fields / static charging
(choose different location/switch off inter-
fering device if possible)
Weighing
result obvi-
ously incorrect
•The display of the balance is not at zero
•Great fluctuations in temperature.
•
Electromagnetic fields / static charging
(choose different location/switch off inter-
fering device if possible)
Should other error messages occur, switch balance off and
then on again. If the error message remains inform manufac-
turer.
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