Care And Maintenance - Sartorius LA Reference Series Operating Instructions Manual

Care and Maintenance

Service
Regular servicing by a Sartorius
technician will extend the service life of
your balance and ensure its continued
weighing accuracy. Sartorius can offer
you service contracts, with your choice
of regular maintenance intervals rang-
ing from 1 month to 2 years. The opti-
mum maintenance interval depends on
the operating conditions at the place
of installation and on the individual
tolerance requirements.
Repairs
Repair work must be performed by
trained service technicians. Any attempt
by untrained persons to perform repairs
may lead to hazards for the user.
Cleaning
§ Unplug the AC adapter from the wall
outlet (mains supply). If you have an
interface cable connected to the
balance port, unplug it from the port.
§ Clean the balance using a piece of cloth
which has been wet with a mild deter-
gent (soap).
§ After cleaning, wipe down the balance
with a soft, dry cloth
! Make sure that no dust or liquid enters
the balance housing.
! Do not use any aggressive cleaning
agents (solvents or similar agents)
Cleaning Stainless Steel Surfaces
Clean all stainless steel parts regularly.
Remove the stainless steel weighing
pan and thoroughly clean it separately.
Use a damp cloth or sponge to clean
any stainless steel parts on the balance.
You can use any commercially available
household cleaning agent that is suitable
for use on stainless steel. Clean stainless
steel surfaces by wiping them down.
Then rinse the equipment thoroughly,
making sure to remove all residues.
Afterwards, allow the balance to dry.
If desired, you can apply oil to the
cleaned surfaces as additional
protection.
Solvents are permitted for use only on
stainless steel parts.
Replacing the Dust Cover
> Instructions for replacing
a damaged dust cover
For LA Series Balances
with a Round Glass Draft Shield
Remove the following parts from the
balance:
– Draft shield cover
– Glass draft shield cylinder
– Weighing pan
– Pan support
– Shield disk: turn clockwise and lift off
– Old dust cover
Place the new dust cover on the balance
and press down on the front and back
along the edges until it is seated firmly
Place the shield disk on the balance and
turn it counterclockwise
Follow the above instructions in reverse
order when placing the remaining parts
back on the balance.
For LA Series Balances with
a Rectangular Weighing Pan and
a Weighing Capacity < 12 kg
Remove the following parts from the
balance:
– Weighing pan
– Pan draft shield (depending on balance
model)
– Old dust cover
Place the new dust cover over the
balance
Follow the above instructions in reverse
order when placing the remaining parts
back on the balance.
!
The dust cover must not touch the
weighing pan
Safety Inspection
If there is any indication that safe
operation of the balance is no longer
warranted:
§ Turn off the power and disconnect the
equipment from AC power immediately
> Lock the equipment in a secure place to
ensure that it cannot be used for the
time being.
Notify your nearest Sartorius Service
Center. Repair work must be performed
by trained service technicians.
We recommend having the power
supply inspected by a certified electrician
at regular intervals, according to the
checklist given below:
– Insulating resistance: > 7 megaohms
measured with a constant voltage of at
least 500 volts at a 500 K-ohm load
– Leakage current: < 0.05mA measured
with a properly calibrated multimeter
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