Cleaning procedures

Cleaning Procedures

In order to maintain the cleanroom cleanliness standard,when bringing equipment into the cleanroom, please ensure that you adopt the following procedures. It is recommended you read the list of approved and banned materials first.

Computers and associated equipment, please let the cleanroom manager known you plan to bring these items in and if you will need LAN access from within the cleanroom.
Before entering any part of the cleanroom, pre-clean the items with IPA and fibre free wipes. For equipment such as computers, keyboards etc, vacuum clean using a general purpose vacuum cleaner.Particular attention should be paid to the ventilation ports.This preclean should be done external to the cleanroom and antroom and items should be covered with clean bagging material, but not of cleanroom quality.
As a guide, notebook computers are prefered to desktop computers (although this is not always practical) not only due to size but also from a cleanliness aspect.
Clean all equipment at an external location to the cleanroom. This equipment can then be bagged to minimise contamination.
Small metallic items (screws, nuts, washers) and non metallic items that are safe to use with solvents must be cleaned using the ultra sonic cleaner located in the chemical lab.
On entering the cleanroom anteroom put on cleanroom gloves before re-cleaning using critical neutral detergent and the wipes provided in the dispensers. A final pre-clean shall be given using Propan-2-ol (IPA) which is provided in the Anteroom.
Visually inspect for any obvious signs of contamination that may have been missed and re-clean if necessary. The best way to visually inspect any item is to view the item surface at a five degree angle with good background lighting

When cleaning items using wipes provided in the anteroom do the following:

Fold the wiper in half and then fold in half again.

Now apply IPA to the folded wiper

The maximum number of wiping actions per fold should be no more than four times.

Wipe the surface in a single direction

Once four wiping actions have been done, use the other folds to continue cleaning as above procedure.

If the person who performs the cleaning operation then goes into the cleanroom, a new pair of cleanroom gloves must be fitted.

The clean item can then be taken into the cleanroom and a final cleanup can be done within the cleanroom as described above using wipers and IPA provided. (see note 1 and note 2)

NOTE1: There are two sets of solvent carriers and solvent wash bottles in the cleanroom. The first set is located in the anteroom which is used for item cleanup and the other is located within the cleanroom. The second set located within the cleanroom is ONLY for use on optics and flight instruments/hardware. The solvent used in the second set is UVASOL and is spectroscopic grade propan-2-ol (IPA). Do not use this second set for general/surface cleaning. When using the spectroscopic grade IPA ensure that the nozzle of the wash bottles do not come into contact with the wiper or any other surface as cross contamination will occur if this happens

NOTE2: There are two grades of wipers used in the cleanroom. General purpose grade wipers (non woven polyester) are availiable in the Anteroom. These wipers should be used for item and general cleanup and should be recycled by disposing of them in the cleanroom laundry basket and NOT in the refuse bins. The second wiper is of a better quality (sealed edge non woven polyester with low particulate and extractables). These wipers are available within the cleanroom in dispensers and should be used on flight quality instruments and hardware.

Monitoring of processes and equipment

When bringing equipment into the cleanroom, ensure that you adopt the following procedure:

All cleanroom users should ensure that they consult the cleanroom manager before they bring any equipment and processes into the cleanroom. The monitoring of equipment and processes going into the cleanroom is an important part of the general contamination control of the cleanroom. If bringing equipment or processes into the cleanroom ensure that you follow the general guidelines listed below.

If you bring equipment into the cleanroom ensure that they are given a rough pre clean outside the clean facility and follow the cleaning procedure listed above. Once inside the anteroom the equipment can be cleaned (with gloves donned) with IPA or Neutral detergent provided on the table in the anteroom. Meticulous cleaning of the equipment is necessary in order to maintain cleanliness in the cleanroom. A casual wipe will not suffice.

General tooling such as screwdrivers, nut drivers, rulers, vernier callipers etc. do not need to be bought into the cleanroom as there is a fully stocked cleanroom tool cabinet for all cleanroom users benefit. The tooling in the cabinet is for cleanroom use only and must never be removed from cleanroom. When using cleanroom tooling ensure that they are put back into the cabinet after use. Do not leave tooling lying about as this means that other users will not be able to use them. If you are a visitor and you need specialised tooling ensure that you contact the cleanroom manager to confirm whether the tooling is available.

If you are bringing a process into the cleanroom ensure you have done a risk assessment on the process and you have discussed this with the cleanroom manager. Under no circumstances may any process go into the cleanroom unless it has been discussed with the cleanroom manager, again this is a monitoring activity to aid in cleanroom contamination control and for Health and Safety reasons.


	Cleaning Procedures In order to maintain the cleanroom cleanliness standard,when bringing equipment into the cleanroom, please ensure that you adopt the following procedures. It is recommended you read the list of approved and banned materials first. Computers and associated equipment, please let the cleanroom manager known you plan to bring these items in and if you will need LAN access from within the cleanroom. Before entering any part of the cleanroom, pre-clean the items with IPA and fibre free wipes. For equipment such as computers, keyboards etc, vacuum clean using a general purpose vacuum cleaner.Particular attention should be paid to the ventilation ports.This preclean should be done external to the cleanroom and antroom and items should be covered with clean bagging material, but not of cleanroom quality. As a guide, notebook computers are prefered to desktop computers (although this is not always practical) not only due to size but also from a cleanliness aspect. Clean all equipment at an external location to the cleanroom. This equipment can then be bagged to minimise contamination. Small metallic items (screws, nuts, washers) and non metallic items that are safe to use with solvents must be cleaned using the ultra sonic cleaner located in the chemical lab. On entering the cleanroom anteroom put on cleanroom gloves before re-cleaning using critical neutral detergent and the wipes provided in the dispensers. A final pre-clean shall be given using Propan-2-ol (IPA) which is provided in the Anteroom. Visually inspect for any obvious signs of contamination that may have been missed and re-clean if necessary. The best way to visually inspect any item is to view the item surface at a five degree angle with good background lighting When cleaning items using wipes provided in the anteroom do the following: Fold the wiper in half and then fold in half again. Now apply IPA to the folded wiper The maximum number of wiping actions per fold should be no more than four times. Wipe the surface in a single direction Once four wiping actions have been done, use the other folds to continue cleaning as above procedure. If the person who performs the cleaning operation then goes into the cleanroom, a new pair of cleanroom gloves must be fitted. The clean item can then be taken into the cleanroom and a final cleanup can be done within the cleanroom as described above using wipers and IPA provided. (see note 1 and note 2) NOTE1: There are two sets of solvent carriers and solvent wash bottles in the cleanroom. The first set is located in the anteroom which is used for item cleanup and the other is located within the cleanroom. The second set located within the cleanroom is ONLY for use on optics and flight instruments/hardware. The solvent used in the second set is UVASOL and is spectroscopic grade propan-2-ol (IPA). Do not use this second set for general/surface cleaning. When using the spectroscopic grade IPA ensure that the nozzle of the wash bottles do not come into contact with the wiper or any other surface as cross contamination will occur if this happens NOTE2: There are two grades of wipers used in the cleanroom. General purpose grade wipers (non woven polyester) are availiable in the Anteroom. These wipers should be used for item and general cleanup and should be recycled by disposing of them in the cleanroom laundry basket and NOT in the refuse bins. The second wiper is of a better quality (sealed edge non woven polyester with low particulate and extractables). These wipers are available within the cleanroom in dispensers and should be used on flight quality instruments and hardware. Monitoring of processes and equipment When bringing equipment into the cleanroom, ensure that you adopt the following procedure: All cleanroom users should ensure that they consult the cleanroom manager before they bring any equipment and processes into the cleanroom. The monitoring of equipment and processes going into the cleanroom is an important part of the general contamination control of the cleanroom. If bringing equipment or processes into the cleanroom ensure that you follow the general guidelines listed below. If you bring equipment into the cleanroom ensure that they are given a rough pre clean outside the clean facility and follow the cleaning procedure listed above. Once inside the anteroom the equipment can be cleaned (with gloves donned) with IPA or Neutral detergent provided on the table in the anteroom. Meticulous cleaning of the equipment is necessary in order to maintain cleanliness in the cleanroom. A casual wipe will not suffice. General tooling such as screwdrivers, nut drivers, rulers, vernier callipers etc. do not need to be bought into the cleanroom as there is a fully stocked cleanroom tool cabinet for all cleanroom users benefit. The tooling in the cabinet is for cleanroom use only and must never be removed from cleanroom. When using cleanroom tooling ensure that they are put back into the cabinet after use. Do not leave tooling lying about as this means that other users will not be able to use them. If you are a visitor and you need specialised tooling ensure that you contact the cleanroom manager to confirm whether the tooling is available. If you are bringing a process into the cleanroom ensure you have done a risk assessment on the process and you have discussed this with the cleanroom manager. Under no circumstances may any process go into the cleanroom unless it has been discussed with the cleanroom manager, again this is a monitoring activity to aid in cleanroom contamination control and for Health and Safety reasons. ©MSSL Created by Alex Rousseau last modified: February 2, 2004 11:48