In the glass melting range rotating spindle (rotation) Linearly variable differential transformer (LVDT) can be calibrated Wide variations of the sample dimensions, chemical composition, and heating Sample measurements, even though the theoretically derived equations allow Standard glasses must be performed under similar experimental conditions as the All viscometer calibration measurements based on Temperature homogeneity in the sample area of the viscometer must be evaluated. Pre-calibrated thermocouple calibration instruments, or ASTM methods. The temperature calibration can be performed using For example, the Littleton softening point is at about log 10( / Pa s) While the old unit Poise is still widely in use. General instructions for glass viscosity measurements are given in ISO 7884-1. Information about the scientific background of the glass viscosity is available in an online course " Viscosity" by Alexander Fluegel, November 2005, here for viscosity calculation.
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