KERN MH5K5 User manual

Operating Instructions Hanging Balance
GB
1 Technical Data
KERN MH5K5 MH10K10
Readout 5 g 10 g
Weighing range 5 kg 10 kg
2 Fundamental information (general)
2.1 Intended use
The balance you have acquired serves to determine the
weighing value of the 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 attached at the balance. 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: Slow flow of
liquids from a container suspended from the balance).
Do not suspend a permanent load from the balance This can
damage the measuring equipment (Risk of fracture). Be sure
to avoid impact shock and overloading the balance in excess of
the prescribed maximum load rating (max.), minus any
possible tare weight that is already present. This could cause
damage to the balance(danger of fracture).
Important:
- Always make sure that there are no living beings or
materials below the load that could be injured or
damaged!
- The balance is not suitable for weighing living beings.
Do not use as baby scales!
- The balance does not comply with the medical
product law (MPG).
Never operate the balance in hazardous locations. The series
design is not explosion-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
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 national 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 unpacking for any visible signs of external
damage.
4.2 Packaging
Please retain all parts of the original packaging in case it
should be necessary to return items at any time.
Only the original packaging should be used for return
consignments. Before despatch, disconnect all attached
cables and loose/movable parts. Apply any intended transport
security devices. Secure all parts, e.g. glass windshield,
weighing plate, power unit etc., to prevent slipping and
damage.
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 application location for your balance,
you will be able to work quickly and precisely.
Therefore please observe the following at the application
location:
• 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. Inadmissible 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
batterys.
• 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
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charging and instable power supply. It is then necessary to
change the location.
5.2 Unpacking
Carefully remove the balance from its packaging, remove the
plastic wrapping and position the balance in its intended
working location.
5.2.1 List of items supplied
Standard accessories:
• Hanging balance
• Batteries
• Operating instructions
5.3 Battery operation and change
Push the lid of the battery housing in the direction indicated.
Insert two #7(AAA) batteries in the polarity shown. The
power source is then connected. After a brief self –test,
lasting for 1 to 2 seconds, the operation is in clock mode
and starts registering time. Close the lid.
6 Operation Instruction
6.1 Set Time
Switch to Clock Mode:
Set Minute
Press the MODE key once. The minute figure blinks. Press the
Set key to adjust minutes.
Set Hour
Press the MODE key once again. The hour figure blinks. Press
the Set key to adjust hours. Press the MODE key once again
to return to normal clock mode. If the MODE key is not pressed
after setting, the display will return to normal clock mode
automatically after a few seconds.
6.2 Scale Mode
Under the clock mode, press the Scale key once. The display
will switch to scale mode.
Weighing
Press the TARE key once. The display registers zero. Hook
the object being weighed. The steady reading is the weight of
the object.
Net weight
Hook the container. Press the TARE key to zero the display.
Put the object inside the container. The reading is the net
weight of the object.
Memory
The product has the feature to retain reading. When the
reading (over 0.05 kg) reaches a steady state the memory is
activated. the symbol “_” for seeing the reading easily is
displayed and the buzzer sounds. Now the load could be
released. This is very helpful in weighing heavy objects.
When the weight varies the reading also varies. When the load
is released the reading indicates the last steady weight. After
seven seconds the display disappears.
6.3 Measuring Temperature
When under the scale mode press Temp button once the
ambient temperature is displayed. Pressing the button again
returns the operation to scale mode. Please note. the
thermometer works only under steady state. When the
temperature varies it takes time to reach a steady state before
accurately displaying the ambient temperature.
7 Maintenance, upkeep, disposal
7.1 Cleaning
Only use a cloth dampened with mild suds and not aggressive
cleaning agents (solvents or similar). Please ensure that fluids
are not able to get into the device and rub off using a clean,
soft cloth. Loose sample residue/powder can be removed
carefully using a brush or hand vacuum cleaner.
7.2 Maintenance, upkeep
The device may only be opened by trained service engineers
authorised by KERN.
7.3 Disposal
The operating company shall dispose of the packaging and the
device in compliance with the valid national or regional law of
the operating location.
8 Troubleshooting
The balance should be switched off for a short time following
an interruption in the programme sequence and disconnected
from the mains supply. It is then necessary to repeat the
weighing process from the beginning.
Help:
Interruption Possible cause
• The balance is not switched on.
Weight display is
not illuminated. • The batteries are wrongly inserted, the
batteries are empty
• No batteries are attached
• Draught/air movement
• Table/floor vibrations
The weight display
changes
continually
• Vibrations on the balance suspension
• Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
• The balance display is not set to zero
• Adjustment is no longer correct.
The weighing
result is obviously
incorrect
• Great fluctuations in temperature.
• Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
Switch the balance off if other error messages should appear
and then switch on again. Contact the manufacturer if the error
message does not disappear.
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