Chapter 3: introduction – Torbal ATS120 User Manual
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Instruction Manual – ATS / BTS Moisture Analyzers
3.1. Function of the Moisture Analyzer
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The primary function of the device is to make precise measurements that allow the user to determine the
moisture content of various materials using the principle of thermo-gravimetric analysis – mass loss of a
sample caused by rapid drying due to an increase in temperature.
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Drying and configuration parameters such as the drying time, temperature, and sample weight, are
determined by the user. Parameter should be established by evaluating the physiochemical properties of a the
sample which will undergo the analysis. Optimum configuration parameters are also often derived through
trial-and-error.
3.2. Good Practices and General Rules
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Larger samples take longer to dry, but produce more accurate results. When accurate results are required,
try to stay in the 5 to 15 gram range. Use the Drying Chart feature to help in optimizing the Sample Size,
Drying Time, and Temperature.
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For uniformity of results, it is better to set the Drying Time for a little longer rather than shorter.
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Lower temperatures take longer, but produce more uniform results in many materials. This is especially true
if thermal decomposition is encountered in which added moisture is driven off as drying continues because
of decomposition.
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Prepare the sample properly. This includes: obtaining uniformity of initial weight, leveling the sample,
using a glass fiber disc with fluid samples or samples that produce fluids when heated, and avoiding
carbonization of the sample when possible (lower heat helps).
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Prepare the sample quickly and get it into analysis before its moisture content is altered by its surroundings.
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The more samples tested, the better the statistical reliability of the results.
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If solvents are required, be very careful of the vapors produced—they can be flammable or even explosive.
Safety first!
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Keep the Analyzer clean, keep the area around the Analyzer clear, calibrate the weighing unit periodically,
and test the unit for moisture accuracy using the Sodium Tartrate Dihydrate chemical standard whenever
problems are suspected (or periodically).
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Above all, remember the Drying Chamber can run at high temperatures, so use caution whenever opening
the cover or handling sample pans. The internal surfaces retain heat for some time.
Chapter 3: Introduction