Model 280A Vacuum Oven - Spallation Neutron Source

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OPERATION 8 Safety Precautions • Before operation, always observe the following Safety precautions. This unit is not explosion proof. Do not use in the presence of flammable or combustible materials; fire or explosion may result. Unit contains components that may ignite such materials. Do not place volatile items in the chamber. Fumes and spillage from acidic solutions cause corrosion of the stainless steel chamber. Care should be taken to maintain neutral pH at all times. • Do not operate oven at temperatures above 200° C. • Do not permit materials of any kind to rest on top of unit when operating at elevated temperatures. • Do not touch the oven door particularly the glass portion, with unprotected hands when operating at elevated temperatures. • To prevent overheating unit is equipped with a safety thermostat that will open at approximately 230°C. • The oven is equipped with silicone door gaskets. Do not use silicone door gaskets or vacuum grease when evaporating solvents in the oven or when using high aniline point oils. BUNA-N gaskets should be used in applications when evaporating solvents or when using high aniline point oils. The interior finish or silicone gaskets may be damaged by the following: • BUNA-N gaskets should not be used above 125°C. Diesel oil JP-4 oil MIL-0-5606 Hydraulic Fluids Butyl Acetate Carbon Tetrachloride Ethylene Chloride Gasoline Kerosene Zylene Methyl Chloride Stoddard Solvent Toluene Aromatic Chlorinated Solvent
Maintenance and Servicing Cleaning Suggestions • Use the mildest cleaning procedure that will do the job effectively. • Rinse thoroughly with water after every cleaning operation. • Wipe dry to avoid watermarks. • A stainless steel wool pad, sponge or fibrous brush is recommended. Avoid use of ordinary steel wool or steel brushes for scouring stainless steel. Periodic Maintenance • Secured access panels, covers, etc., should never be removed from this equipment by anyone other then experienced service personnel, • If the oven fails to maintain set temperature, it may indicate a problem with the Temp. Control, or possibly a heating element failure. Contact your local Fisher Scientific service representative (1-800-395-5442). • Gaskets should be checked periodically for hardening, shrinking, deterioration or other signs of wear. It is advisable to keep several gaskets available for use as replacements. Seal Replacement To replace the oven seal, remove the old seal and perform the following: 1. Clean edge of chamber with Xylene, (Cat. No. LLX5-500). 2. Apply a thin bead of Dow Corning RTV-736 red silicone rubber adhesive to edge of the chamber. Place gasket on chamber and close the door. 3. Keep door closed for a minimum of 16 hours with 1 to 2 inches of vacuum before using. 9
Page 1 and 2: 102265 • 2/5/10 Model 280A Vacuum
Page 3 and 4: Performance and Physical Data Model
Page 5 and 6: Note Recommended vacuum tubing and
Page 7: 4. Close the vacuum control valve a
Page 11 and 12: Schematics 11

Model 280A Vacuum Oven - Spallation Neutron Source

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