Linked Test Options
Linking tests enables multiple adjoining memory starts to be run together as one test. Increasing temperatures, rates, times, etc., may be selected to monitor the progress of moisture loss for research and/or control purposes. In some materials, such as gypsum powder, moisture occurs in more than one molecular state, usually free water and one or two bound water states. A third condition exists in the ashing process when other components of the sample are driven off at very high temperatures and only the ash remains.
The Linked Test Option will also prevent rehydration of the sample between tests. As the test for free moisture is completed, the next memory start in sequence will be initiated. This subsequent memory start must contain the parameters for the bound water test. As this test ends, the next memory start may be initiated and so on for as many links as needed for the process. The sample integrity will not be compromised between tests since the instrument’s lid is not opened.
∙Free water evaporates from the sample at relatively low temperatures, typically 40° to 80° C.
∙Bound water however requires higher temperatures, some around 135° C and others around 240° C to break the molecular bonds.
∙The MAX 5000XL also provides temperatures to 600° C for ashing purposes.
The linked tests may also be helpful in determining the temperature at which moisture is freed in unknown sample material. Setting the temperature a few degrees higher in each succeeding test will eventually reach a point of weight loss due to evolved moisture.
∙Link To Next Test - To run a single test or to make this the last segment of linked series, toggle this parameter to NO.
∙Result Type - The two selections for result type offer an Individual determination for this memory start or a Total determination of two or more linked memory starts.
Individual Result – This selection provides the result of this test when two or more tests are linked.
Total Result – This selection provides the result using the start
weight of a preceding memory start and the final weight of this memory start.
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