Sterilization With Formaldehyde; Cleaning The Exterior Surfaces; Cleaning The Floorpan - Thermo Scientific Safe 2020 Operating Instructions Manual

Operating Instructions Safety Cabinet Safe 2020 / Maxisafe 2020
9. Cleaning and decontamination
9.4

Sterilization with formaldehyde

Procedure:
For sterilization, formaldehyde is evaporated in the tightly sealed sample chamber.
The quantity of the formaldehyde used depends on the sample chamber volume
of the cabinet version to be disinfected (see Technical Data).
Per cubic meter of sample chamber volume, at least 5 g formaldehyde must be
evaporated with 20 ml water (corresponds with 25 ml of a 20 % formaldehyde
solution). The formaldehyde evaporates immediately when its boiling point is
reached. The required reaction time is at least 6 hours.
After the required reaction time, the formaldehyde should be neutralized by
evaporating a 25 % ammonium solution (10 ml per cubic meter of sample
chamber volume).
Ambient conditions and accessories:
The temperature at the cabinet location should be approx 21 °C, the relative
humidity should be between 60 and 85 %. To evaporate the solution, a heating
device with a container is required.
9.5

Cleaning the exterior surfaces

Wipe the exterior surfaces of the device clean using a solution of tepid water
and commercial dishwasher solution. Then, wipe exterior surfaces dry using a
soft, clean cloth.
9.6

Cleaning the floorpan

Clean the floorpan using a solution of tepid water and commercial dishwasher.
1. Remove the working plates from the sample chamber.
2. Remove dirt residues and deposits thoroughly.
3. Wipe the floorpan clean using a clean cloth and plenty of clear water.
4. Remove the cleaning liquid from the floorpan and wipe the floorpan surfaces
thoroughly clean.
5. Reinstall the working plates.
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NOTE – Disinfection procedure
A sterilization with formaldehyde must be
performed in accordance with the specifications
of NSF 49/1992, Annex G.
As this procedure has considerable risks, it
must only be performed by specially trained
and authorized service personnel!
NOTE – Material residues
After cleaning, make sure that all cleaning
materials have been removed completely from
the floorpan.