Preventing Contamination - Sanyo MCO-19M Service Manual

PREVENTING CONTAMINATION

To prevent contamination of the chamber, select a suitable installation site.
Avoid locations with high temperatures or humidity.
Avoid locations with high temperatures or humidity, because of a greater presence of microorganisms in
the air.
Avoid locations with passers-by or drafts.
Avoid locations near doors, air conditioners, fans, etc., where passers-by or drafts can facilitate the entry
of microorganisms into the chamber.
If possible, use a cleanroom.
To achieve a better culture, it is recommended that a cleanroom be used if one is available.
Use clean containers.
The greatest cause of contamination is dirty containers for cultures. Be careful not to get containers or
trays dirty when taking them in and out.
Keep the chamber clean.
Wipe off any fingerprints. If water spills from the humidifying pan, or if the doors are left open for a long
time, condensation may form on the inside of the doors. If that occurs, wipe off the condensation with a
dry sterile gauze. In particular, clean and disinfect the chamber if the culture medium is spilled. For details,
refer to Routine Maintenance on page 45.
Use sterile distilled water in the humidifying pan.
Always use sterile distilled water in the humidifying pan. Do not use ultrapure water, because it may
contain red rust-like suspended particles.
A water level alarm is displayed in the status display area on the control panel. Quickly refill the water in
the pan when the water level alarm is displayed. Adding low-temperature water will significantly lower the
temperature in the chamber. Clean the humidifying pan once a month.
Keep the Incubator out of direct airflows from air conditioners or fans.
Cool airflow from an air conditioner may cause condensation and lead to possible contamination.
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