AND Phoenix GH [GH-300] Analytical Semi-Micro Balance w/ Internal Calibration, 320g x 0.1mg - 90mm Ø . The AND Weighing Phoenix GH-300 Analytical Balance, 320g x 0.1mg with Internal Calibration with RS-232C features OES technology offering high performance and a wider range of models with reliable accuracy and precision. The GH300 includes automatic self-calibration to maintain accuracy under temperature changes. The GH300's clock/calendar function allows for time & date stamps and GLP reports.