Purpose
This SOP describes the procedure for operation and cleaning of Fume Hood.
Scope
This procedure is applicable for operation and cleaning of Fume Hood at ABC Limited.
Procedure:
Operation
- Ensure that fuming hood is clean and no other activity is under operation in hood.
- Fume hood is having three regulators green colour is for water supply, yellow colour is for LPG supply & blue colour is for nitrogen supply.
- Out of three only water supply is in use.
- Open the glass door up to comfort height for the work by pushing door, slightly to upside.
- Switch on the exhaust of the fume hood by pressing green button.
- Connect the instrument (hot plate, muffle furnace etc.) with main power supply and others during the analysis.
- Carry out the test as per standard test procedure in the hood chamber.
- Remove the test sample from hood after analysis and close the front glass door to down position.
- Switch off the exhaust of the fume hood by pressing red button.
- After completion of work clean the hood carefully.
Calibration
- Operate the fuming hood as per point no. 4.1.
- Proper functioning of fuming hood is essential to maintain laboratory, pollution free operation.
- Make the fuming hood clear of all corrosive acids and chemicals; remove glass condensers and tongs.
- Clean the exterior and top of the fume chamber, first by sweeping the top and dusting with cloth.
- Shut off power supply from mains.
- Clean the exhaust ducting with brush.
- Clean the tube light and surface of fuming hood with a piece of cloth.
- Check the performance of these following points.
- Starter of exhaust fan
- Performance of exhaust fan
- Performance of tube light change if required.
- If the paint on interior surface has become dull or having stains, arrange for re-painting.
Precautions
- Ensure that there are no inflammable chemicals present in the hood chamber.
- Clean the fume hood after disconnecting all electric power.
- Use strong acid carefully in hood chamber.
- Air exhaust should be on at the working time in fume hood.
