● Diagram Balance Beam Fulcrum Deflection Housing Driving Coil Sensor Holder Furnace Theory of Operation Balance Circuit When a weight change occurs on the sample side, the beam is slightly inclined. This displacement is detected gg画 optically and the drive coil current is changed to return the displacement to zero. The detected drive coil current change is proportional to the sample TG/DTA Work weight change and is output as the TG Module CPU Station signal. The DTA detects the temperature difference between the sample holder and the reference holder using the electromotive force of thermocouples which are attached to the holders. This differential is output as the DTA signal
5000 200 000 000 3000 400 2000 600 000 1000 1000 DTA 1200 -2000 -1400 3000 -1600 4000 1800 -5000 -2000 200 400 600 Temp C o00 1000 200
Diamond dsc差示扫描量热仪图片及仪器性能介绍
Diamond DSC 差示扫描量热仪图片及仪器性能介绍
Platinum Alloy PRT Sensor Platinum Resistance heater Heat Sink
Sample Reference Platinum Alloy PRT Sensor Platinum Resistance Heater Heat Sink
扫描速度的影响 灵敏度和分辨率的折中 灵敏度随扫描速度提高而增加 分辨率随扫描速度提高而降低 技巧:增加样品量得到所要求的灵敏度,低扫描速度得 到所要求的分辨率 样品制备的影响 样品的几何形状:样品与皿的紧密接触 样品皿的封压:底面平整、纤维不外露 样品量:增加样品量提高灵敏度、降低分辨率
•扫描速度的影响 灵敏度和分辨率的折中 灵敏度随扫描速度提高而增加 分辨率随扫描速度提高而降低 技巧：增加样品量得到所要求的灵敏度，低扫描速度得 到所要求的分辨率 •样品制备的影响 样品的几何形状：样品与皿的紧密接触 样品皿的封压：底面平整、纤维不外露 样品量：增加样品量提高灵敏度、降低分辨率