Temperature mapping is performed in storage areas where temperature sensitive products are stored. The aim of the temperature mapping exercise is to:
- Ensure that the temperature, in the entire space remains within the specified temperature range.
- Identify the location for the monitoring probe(s) for the continuous temperature monitoring & alarm system.
- Demonstrate that the storage system performs in a controlled manner during extremes of climatic conditions. (This is more significant for warehouses and less relevant for chambers within a laboratory where the ambient environment is itself controlled).
- Demonstrate that during “normal” operation the storage area functions in a controlled manner.
- To document that temperatures with in the system are within the specified temperature range.
Sometimes additional tests are conducted during the Installation Qualification to characterize the operating behavior of the storage system:
- Affects of door openings of various duration on the internal temperature.
- Affects of a power failure (or other catastrophic failure of the refrigerant system) and how long it takes for the storage system to breach the temperature specifications.
- How long it takes for the storage system to be restored to normal operations.
- To verify that the backup electricity generators kick in as designed.
- In Storage areas where there is redundant refrigeration systems, these should be verified that they kick in when appropriate. I.e. when the primary system can not keep up with the load or when the primary systems are inoperable due to a catastrophic breakdown.