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YYG—77型冷原子测汞仪是用来精确测定空气、水、土壤等样品中痕量汞的专用分析仪器。它具有灵敏度高,分析速度快,干扰少,记忆效应小等特点。但该仪器的检测器(GDB—152型日盲光电倍增管)所用直流高压是由32节22V的电池,经串联成700V高压供给的。在使用过程中由于漏电,仪器耗电等原因,电池电压极易下降,使仪器灵敏度降低。该仪器为了防止电压下降所造成的不
YYG-77 cold atomic mercury analyzer is used to accurately determine the air, water, soil and other samples of mercury in the special analytical instruments. It has high sensitivity, fast analysis, less interference, small memory effect. However, the instrument’s detector (GDB-152-type blind photomultiplier tubes) used by the DC high voltage of 32 22V battery, the series of 700V high-voltage supply. In the process of using due to leakage, power consumption and other reasons, the battery voltage is very easy to drop, so that instrument sensitivity is reduced. The instrument in order to prevent the voltage drop caused by no