Thermo Scientific Sorvall ST Plus Series, Instructions For Use Manual

Page: 91 / 172

5-1
Maintenance and Care
5. Maintenance and Care
5. 1. Cleaning Intervals
For the sake of personal, environmental, and material protection, you must clean and if necessary disinfect the
centrifuge and its accessories on a regular basis.
5. 2. Basics
ƒ Use warm water with a neutral detergent that is suitable for use with the materials. If in doubt contact
the manufacturer of the cleaning agent.
ƒ Use a soft cloth for cleaning.
ƒ Never use caustic cleaning agents such as soap suds, phosphoric acid, bleaching solutions or
scrubbing powder.
ƒ Remove rotor and clean centrifugation chamber with a small amount of cleaning agent on a clean
cloth.
ƒ Use a soft brush without metal bristles to remove stubborn residue.
ƒ Afterwards rinse with a small amount of distilled water and remove any remains with absorbent
towels.
ƒ Use only cleaning and disinfecting agents with a pH of 6-8.
CAUTION Not rated procedures or agents could deteriorate the materials of the
centrifuge and lead to malfunction. Refrain from using any other cleaning
or decontamination procedure, if you are not entirely sure that the intended
procedure is safe for the equipment. Use only cleaning agents that will not
damage the equipment. In doubt contact the manufacturer of the cleaning
agent. If still in doubt, contact Thermo Fisher Scientific.
5. 2. 1. Rotor and Accessories Inspection
After thoroughly cleaning the rotors, they must be inspected for damage, wear and corrosion.
The cycle limits of the rotors and buckets are stated on some rotors and buckets and in the technical data
section of each rotor (
“Rotor Specifications” on page B-1 ).
NOTICE
Usage beyond these limits might lead to rotor failure, sample loss and damage to the centrifuge.
CAUTION Do not run any rotor or accessories with sign of damage. Ensure that the
rotor, buckets and accessories are within their expected maximum number
of cycles. It is recommend that you have rotors and accessories inspected
yearly as part of your routine service to ensure safety.
Metal Parts
Make sure that the protective coating is complete. It can be removed through wear and chemical attack and can
lead to unseen corrosions. In case of corrosion, such as rust or white / metalic pitting, the rotor or accessories
must be removed from service immediately. Particular attention should be paid to the bottom of buckets on
swing out rotors and tube cavities on fixed angle rotors.
Slide Coated Rotors
Rotor crosses are provided with an anti-friction and corrosion resistant finish.
The following procedure is for rotor crosses and rotor trunnion bolts:
ƒ
Regular cleaning of contact area between the rotor and buckets (rotor cross trunnions and bucket
grooves) is recommended with a mild detergent (every 300-500 cycles).
ƒ
The rotor cross is coated with a special advanced lubricating and protective coating, therefore no grease
is necessary.
ƒ
Contaminating particles (dirt, dust or debris) in the rotor cross and bucket grooves may lead to imbalance
and cleaning will be required.
ƒ
The lubricating coating may, over extended periods or under heavy loads, become worn. If this occurs a
small amount of greasing of the rotor cross trunnions will be required with bolt grease (75003786).