HQ—71A型红外线分析仪有时在通零气的时候,表头指示相当大,经反复调试,发现此表一会儿出现正程现象,一会儿出现反程现象;通样气,其分辨率甚小,零点、量程、相位反复调整,均未能调试成功。在调试过程中,我们检查了同样的HQ—71A型红外线分析仪,发现薄膜微音器、放大器基本正常。然后着重地考虑光源问题,因为该表是双光源的红外线分析仪,必 HQ-71A Infrared Analyzer sometimes pass zero gas, the header instructions quite large, after repeated testing and found that this table appeared positive phenomenon at a time, while the phenomenon of anti-Cheng phenomenon; sample gas, the resolution is very small, Zero, range, phase repeatedly adjusted, failed to debug successfully. In the debugging process, we examined the same HQ-71A infrared analyzer and found that thin film microphones, amplifiers basically normal. Then focus on the issue of light, because the table is a dual light source infrared analyzer, will