When the prediction is sufficiently reliable, the test ends and the predicted result is displayed, stored in the instrument, and printed if an accessory printer is enabled and attached. Proper selection of the ending criteria can greatly improve the test times and repeatability.
Auto - The instrument monitors the progress of moisture determination and automatically selects the ending criteria most appropriate to the test under way.
Manual - In a few instances, best performance will be achieved by adjusting the ending criteria.
This ending criterion is called the Reliability, and
is activated when the predicted moisture value and the actual moisture loss are sufficiently close together. The number displayed is a percentage, equal to the actual moisture loss divided by the predicted moisture, times 100%. For example, if 90% is entered, the test will end when the actual moisture loss is within 90% of the predicted moisture.
Rate - This feature ends the test when the weight loss rate falls below a selected value. This value is a “percent per minute.”
For example, entering 0.100 means that the test will end when the rate of change of the actual weight loss is less than 0.100 % of the original sample weight per minute.
The instrument's program assumes that the sample contains volatile material that
will completely evaporate after some time. It further assumes that, at first, the rate will increase to a maximum point, and then gradually decrease to zero. Selecting some threshold rate value will cause the test to end before the sample is completely dry. Rate is useful to profile a sample's weight loss. Some applications are faster in the rate ending criteria. Others are faster in the prediction ending criteria.
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