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最近,我们维修了一台M750UVIS—A型微量紫外可见光光度计。这台机器故障较多,我们参照设备的光路、电子线路,从故障现象分析可能产生的原因,实际模拟测试,缩小范围,逐个找到出故障原因。故障一 1、现象:当仪器工作在氢灯位置时,起动半小时,继电器仍劈拍劈拍跳个不停,氢灯闪烁。 2、分析故障可能原因: (1)继电器长期使用,触点有毛刺。 (2)氢灯恒流源线路出问题。 (3)氢灯老化。 3、实测及模拟试验: (1)继电器JTX—32是有机玻璃外壳,明显可见触点光滑平整。
Recently, we have repaired a M750UVIS-A micro-UV-visible photometer. This machine more failures, we refer to the optical equipment, electronic circuits, from the failure phenomenon analysis may cause, the actual simulation test, narrow the scope, one by one to find the cause of the malfunction. Fault 1 1, the phenomenon: When the instrument is working in the hydrogen lamp position, start half an hour, the relay is still splitting split shot jump non-stop, hydrogen lamp flashing. 2, analysis of the possible causes of failure: (1) the long-term use of the relay, the contacts have burrs. (2) hydrogen lamp constant current source line problems. (3) hydrogen lamp aging. 3, the actual measurement and simulation tests: (1) relay JTX-32 is plexiglass shell, the contact is clearly visible smooth.