The MAX® 2000 and MAX® 1000 Moisture Analyzers use state-of-the-art technology to monitor and control test temperatures to assure consistent, reliable moisture results. These units use platinum RTD (resistive temperature device) to measure the temperature generated from the heater coil. This information is relayed to an advanced microprocessor, which controls and limits the heater output to reach and maintain the programmed test temperatures without overshoot.
Factory calibration for the MAX® 2000 and MAX® 1000 Moisture Analyzers is performed using a proprietary calibration device that utilizes an NIST traceable RTD positioned at the sample height to calibrate and verify temperatures in the instruments from 60°C to 275°C (225°C in the MAX® 1000). Measured temperatures at the sample level are recorded into memory and internal constants are adjusted using sophisticated regression algorithms to correlate temperatures measured at the sample surface with the heater’s RTD and heater coil output. Thus, the temperature displayed on the display of the instrument is the temperature as measured at the sample’s height. An optional accessory for the MAX® 2000, the Temperature Calibration Module, allows the user to perform the same calibration and verification on site.
The MAX® 2000 and MAX® 1000 Moisture Analyzers have programmable ending criteria which permit the end-user to select the optimum test conditions for their test sample. The available programs are “predict,” “rate,” and (for the MAX® 2000) “time.” The Computrac patented “predict” ending criteria ends the test when the difference between the predicted and the actual moisture content agree within a certain value. In the automatic mode, this value is based upon the moisture content of the sample. The “rate” ending criteria ends the test when the moisture evolved from the sample in a minute’s time falls below the programmed threshold. The “time” ending criteria runs a fixed time test to determine moisture content (similar to a standard oven-drying test).