Standard Sensor Layout for Efficiency in Thermal Validation

Posted by Kristine LeBlanc on Feb 1, 2018 12:44:19 PM

Sensor Layout Blog 1.jpgStandardization makes it easy!

Whether you are placing sensors in a refrigerator, freezer, stability chamber, cold room, sterilizer, bioreactor or any chamber, room or vessel, consider a standard layout for convenience.

16 sensors are standard. You can use more, you can use less, but 16 sensors will give you a fair representation of your chamber.

Divide your chamber into top, middle, and bottom planes.

Place 5 sensors in each plane in a dice pattern – covering the 4 corners and the center in each plane.

You can start your numbering anywhere – but be consistent chamber to chamber.  Wherever you start, go clockwise or counterclockwise – but again, do it the same way each time.

Our preference is to start on the top plane, left side, front corner with sensor #1.  Clockwise makes top plane, left side, rear location sensor #2.  Continuing clockwise, sensor #3 is top plane, right side, rear.  Sensor #4 is top plane, right side, front.  Sensor #5 is placed in the center of the top plane.

In the middle plane, follow the same logic.  Sensor #6 is placed in the middle plane, left side, front.  Placing the sensors clockwise makes middle plane, left side, rear location sensor #7.  Continuing clockwise, sensor #8 is middle plane, right side, rear.  Sensor #9 becomes middle plane, right side, front.  Sensor #10 is then placed in the center of the middle plane.

In the bottom plane, continue the pattern.  Sensor #11 is placed in the bottom plane, left side, front.  Clockwise makes bottom plane, left side, rear location sensor #12.  Continuing clockwise, sensor #13 is bottom plane, right side, rear.  Sensor #14 is located on the bottom plane, right side, front.  Sensor #15 is placed in the center of the bottom plane. 

Lastly, sensor #16 should be placed adjacent to the controlling sensor.

Perfecting this standard layout strategy can reduce chamber validation setup time. Same positions on every chamber make wiring efficient and easy!  Eventually, everyone will have the pattern memorized and the ability to associate values with the locations when analyzing the results from validation.

 

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Topics: validation services, chamber validation, thermal validation, sensor placement, sensors, refrigerator validation, cold room validation, freezer validation