Labconco Rapid Digestors 23080 - Manual (Page 12)

ROUTINE MAINTENANCE
13
Periodic cleaning of the surface is necessary to avoid stains from acid spills. This is best
accomplished with a detergent and water solution when the unit is cool. (Disconnect unit
from electrical source).
It is necessary to keep the cores of the ceramic heaters clear of any foreign material to
assure free insertion of the digestion tubes.
Calibration: The controller has been factory calibrated and should not require re-
calibration. In the event re-calibration is required the following procedure should be
followed:
1. Insert calibration resistor into the 2-pin sensor connector located on the rear of the
control unit.
2. Place ON-OFF switch, located on the controller, to the ON position.
3. Adjust set-point indicator dial to a position where the indicator lights, located on front
panel of digestor, are illuminated 50% of the time.
4. Loosen setscrews on set-point indicator dial and align calibration mark on dial with
pointer label. For calibration of Rapid Digestor 4-Place, align 220°C mark on dial
with pointer label. Retighten setscrews.
5. The digestor is now calibrated to give digestion temperature indicated on set-point
dial.