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Maintenance
Sorvall® Centrifuges
Cleaning
Rotor Chamber
The rotor chamber should be kept clean and wiped dry routinely to maintain
efficient cooling. Wash the chamber with a mild dishwashing liquid, then rinse and
dry with a soft absorbent cloth.
Use 70% ethanol to disinfect the rotor chamber or a 2% glutaraldehyde solution to
sterilize it. For general radioactive decontamination, use a solution of equal parts of
ethanol, 10% SDS, and water. Follow this with ethanol rinses then deionized water
rinses. Dry with a soft absorbent cloth. Dispose of all wash solutions in proper
radioactive waste containers.
CAUTION
Chlorides are extremely harmful to aluminum alloy rotors and can cause stress
corrosion cracking. Therefore, do not use chlorides to disinfect the chamber.
Tapered Drive Spindle
Wipe the drive spindle with a soft cloth each time a rotor is to be installed to
reduce the chance of the rotor sticking. Once a week, wash the drive spindle with
warm water.
Cabinet
Clean the Noryl® cabinet panels with a household wax cleaner.
Use a mild
noncdkaline detergent and water to clean the top deck and the chamber door.
Control Panel
To clean the control panel, spray a small amount of a mild cleaning liquid (such as
window cleaner) on a clean cloth and wipe the panel clean. DO NOT spray cleaners
directly on the control panel.
Door Seal
The chamber door seal should be cleaned once a month. If the seal is not kept
clean, it can result in an insufficient vacuum level during a vacuum run.
To clean the seal:
1. Open the chamber door all the way.
Using a #1 phillips (or Reed-Prince)
screwdriver, loosen the quarter-turn fastener (turn counterclockwise) on the
front edge of the door (figure 7-1, view 1).
2. Close the chamber door halfway, then locate the hole in the center of the tray
assembly, underneath the door (figure 7-1, view 2). Insert your fingers approxi-
mately 13mm (1/2 inch) into the hole and pull forward on the silver seal tray
until the hole is visible. Continue pulling tray out while pushing back on the door
handle until the door is fully open and the seal tray assembly is separated from
the door. Remove the sealing assembly.
7-2
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