Recovery Test 

Recovery Test / Time Recovery Test for Clean Room Validation

Introduction : 

The Recovery Test, also known as the Time Recovery Test, is a critical component of clean room validation. It is designed to assess how quickly a clean room can regain its specified cleanliness level after being contaminated. This test is essential for ensuring that clean rooms maintain the required environmental conditions for the protection of products, processes, and personnel.

Purpose: 

The primary purpose of the Recovery Test is to evaluate the effectiveness of a clean room's air filtration and purification systems. It helps in determining how well the clean room can recover from a sudden increase in particle contamination, such as might occur when personnel enter the clean room or during equipment setup.

Test Procedure:

• Baseline Measurement : Before conducting the test, a baseline measurement of the clean room's particle count is established. This measurement represents the standard cleanliness level that the clean room is designed to maintain.

• Contamination : Controlled contamination is introduced into the clean room environment. This contamination can be in the form of airborne particles, such as dust or aerosols, which are dispersed evenly throughout the room. The quantity and type of contaminants should be predetermined.

• Measurement Period : After contamination, the clean room's particle count is continuously monitored over a specified time period. The duration of this period depends on industry standards and clean room classification.

• Recovery Assessment : The rate at which the clean room's particle count decreases is closely observed. The objective is to determine how quickly the clean room can return to its baseline cleanliness level.

• Acceptance Criteria : The results of the Recovery Test are compared to predetermined acceptance criteria. These criteria typically specify the maximum allowable time for the clean room to recover to its baseline cleanliness level. If the clean room meets these criteria, it is considered validated.

Key Considerations:

• The Recovery Test is performed under dynamic conditions, mimicking real-world scenarios where personnel and equipment may generate contamination.

• It is crucial to use appropriate and calibrated particle counting equipment during the test.

• The test should be conducted by trained personnel to ensure accuracy and consistency.

• Regularly scheduled Recovery Tests are essential to confirm the ongoing performance of the clean room.

Conclusion: 

The Recovery Test is a vital aspect of clean room validation, ensuring that clean rooms maintain their specified cleanliness levels even after contamination events. This test helps guarantee the integrity of critical processes, the quality of products, and the protection of personnel.

At TRO Air Solutions, we specialize in clean room validation services, including the meticulous execution of Recovery Tests. Our commitment to excellence ensures that your clean room consistently meets the highest industry standards.

For more information or to schedule a clean room validation service, please contact us