Torbal ATS120 - Manual (Page 19)

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Instruction Manual – ATS / BTS Moisture Analyzers
Optimal drying parameters for a sample can be easily obtained by performing trial-and-error analysis. The objective is to
establish an ideal Drying Temperature for the sample, as well an optimal Drying Time, and Sample Size.
Drying Temperature - An ideal Drying Temperature is such that will allow the analyzers to completely dry the sample in a
reasonable amount of time (with unnecessarily delaying the analysis), but won’t burn the sample. Burring or introduction
of combustion will always result if an inaccurate result. Even discoloration can be a sign of combustion.
Drying Time – total drying time must be long enough to completely dry the sample. If drying time is too short, moisture
will remain in the sample after the analysis is terminated therefore resulting in an incomplete result.
Sample Size – the size of sample must be an adequate statistical representation of the substance or matter which is
analyzed. A sample should always be placed in uniform layers measuring 2 to 5mm in thickness and weighing 5 to 15g,
depending on the substance. Large samples will require a longer drying time.
To perform trial-and-error analysis it is recommended to use the analyzer’s graph plotting feature (Drying Chart). The
graph will assist in determining optimal drying time.
11.1. Activating the Drying Chart
1.
Press the Menu key and use the navigation keys to select option 3 (Drying Options).
2.
Use the navigation keys to select option 2 (Drying Chart)
3.
Enable the Drying Chart by switching Status form OFF to ON.
Chapter 11: Determining Drying Parameters for Unknown Samples