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1.
Preventive Maintenance Checks and Services for Sartorius Analytic Balance ( Model A 200 S).
Routine maintenance ensures trouble–free operation. Checks and services listed below should be conducted daily
and prior to each use.
Check/Service
Note
Check that glass plates are not
Remove glass to clean.
cracked, chipped, or dirty.
Check that interior of weighing
Remove weighing pan and wipe interior clean using a
compartment is clean.
lint–free, dry cloth. Remove dust particles with camels
hair brush. Clean and replace weighing pan.
2.
Troubleshooting.
Troubleshooting this equipment consists of observing results of normal operations and
results of running both the external and internal calibration checks. It also includes a thorough visual inspection of
the measuring cell and all electrical connections.
a.
If you detect the following problems:
- poor reproducibility
– display hysteresis
– nonreproducible corner load
– permanent “L” in the display
– skipping display
you are very likely dealing with a mechanical fault.
b.
If you find:
– error message in the display
– display dark or display segments missing
you are very likely dealing with an electronic error.
3.
Maintenance – Remove/Replace Procedures.
3.1 Remove/Replace the Display Panel.
a.
b.
Remove weighing pan, ring, shield plate, and base plate from the balance. Unscrew three screws (1) from
the hood and carefully lift hood to the right and place next to balance.
NOTE
The display panel includes the tare pcb, when the balance has basic equipment.
Remove the keyboard overlay (2) in the display panel (3). Remove screw (4) in the display panel.
