Status:Closed Asked:May 16, 2012 - 06:57 AM
How do we translate the 7E hot and cold profile into chamber test profile? Is there a test procedure to follow?
If your chamber controller does not allow you to move from point to point in the one hour temperature profiles, you can expand the time between temperature settings provided the resulting profile meets the requirements stated on page 5 of 7E under the section titled "Level of Performance" where it states the following regarding creating a profile.
"Standard 20 allows for a temperature profile tolerance of ±3.0°C (above or below the Profile value for each hourly interval). This is indicated in the graphs that follow. The average temperature of the profile used must have an average value that is ±1.0°C relative to the mean temperature for the 7E profile average value. If a programmed chamber profile test results fit within the indicated envelope, as shown in the graphs and in the tabular data, and it produces a mean temperature value within the limits, then it is considered to be a valid 7E profile."
If you need further assistance in developing a profile, please contact Ed Church directly at ISTA. firstname.lastname@example.org and he can put you in touch with a consultant to assist you.
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