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2. HOW TO USE LEV

2. HOW TO USE

working in a cabinet

LEV can only provide protection if used correctly. Efficient extraction from the workingarea of the LEV depends on air flowing into and passing through the equipment as intended.

To maintain air flow in fume cupboards and microbiological safety cabinets, remember the following:

  • Limit what you put inside LEV to the minimum needed for the work – do not use it as a storage area for chemicals or equipment!
  • Avoid using large items of equipment inside the LEV. If you do need to use equipment inside a cabinet, use lab jacks to raise the equipment and allow air flow underneath it
  • Make sure lightweight items (filter papers, aluminium foil etc.) are secured to prevent them being drawn into ducting or blocking filters
  • Keep the first 15cm inside the cabinet free of obstructions to make sure air is drawn into the cabinet effectively - mark this line as a reminder
  • Maintain a working opening of no more than 50cm high – mark this maximum height as a reminder
  • Never remove horizontal sliding sash panels during use as it will disrupt containment
  • Keep the cabinet clean and tidy and leave it in a good condition after use - ensure redundant equipment is removed and surfaces are cleaned
  • Dispose of waste following local procedures, don’t let it accumulate or leave it in LEV for longer than necessary

If experiments under LEV are left unattended or overnight, remember to display signs and emergency contact details

Finally, report faults or problems and encourage others to, if they think that LEV isn’t working properly. If necessary, take the equipment out of service or make sure it is repaired straight away.

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