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７５１Ｇ和７５２０分光光度计电源线路的更改童德泉（沙市计量测试所，沙市４３４０００）７５１Ｇ和７５２０分光光度计电源故障是常见故障之一，而其电源故障往往导致集成稳压器件的损坏或性能指标下降。７５１Ｇ分光光度计的钨灯稳压电源和氢灯恒流源采用ＷＡ７１５８...
Changes in 751G and 7520 Spectrophotometer Power Supply Circuits Tong Dequan (Shashi Metrology Institute, Shashi 434000) The power failure of the 751G and 7520 spectrophotometers is one of the common faults, and their power failure often results in damage to the integrated voltage regulator or degradation of performance specifications . 751G spectrophotometer tungsten lamp power supply and hydrogen lamp constant current source using WA7158 ...