论文部分内容阅读
一、故障现象:在测本底和样品测量时,脉冲数均为零,即不计数。排除此故障后又出现微分档和积分档所测得的本底数相同 (330～360个/分),微分档正常本底应该是小于或等于30个/分。二、故障寻迹与排除:本机分为两大部分:(1)探测与采样装置;(2)数据处理装置。1.首先检查了±6V、±12V ±24V都正常。高压电源为658V,调回到出厂值(677V),高压调节旋钮在5.4圈,换样器
First, the fault phenomenon: at the end of the measurement and sample measurement, the number of pulses are zero, that is not counting. Excluding this failure occurs again the differential file and integral file measured the same background (330 ~ 360 / min), differential file normal background should be less than or equal to 30 / min. Second, the fault tracing and troubleshooting: The machine is divided into two parts: (1) detection and sampling device; (2) data processing device. 1. First check the ± 6V, ± 12V ± 24V are normal. High-voltage power supply is 658V, transferred back to the factory value (677V), high-pressure adjustment knob at 5.4 laps, sample changer