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我院有一台XG-200mA X线机(双床双球管,上球管是旋转阳极管),它的上下球管高压交换闸触头经常接触不良,造成上球管灯丝不亮。而上球管的窗口又装有手动缩光器和铅板,无法看清灯丝亮不亮,只有等摄片时从毫安表上或胶片上才能发现问题。这样球管在灯丝不亮的情况下加上高压(称冷高压),对球管的工作寿命有很大的影响,工作不使,而且造成浪费。我们利用灯丝变压器初级电流值与次级有无负载有关这一特点,装上一个摄影保护电路,经过一年多的使用,效果较好,现介绍给大家。在灯丝变压器的初级串上一电流继电器,见附
Our hospital has a XG-200mA X-ray machine (double-bed double tube, the ball tube is a rotating anode tube), its upper and lower tube high-pressure exchange gate contact often bad contact, resulting in the lamp on the tube is not bright. The window of the upper tube is equipped with a manual condenser and a lead plate, and it is impossible to see that the filament is not bright. Only problems such as the milliammeter or the film can be found when waiting for the film. In this way, when the bulb is not lighted, high pressure (or cold high pressure) is added, which has a great influence on the working life of the bulb, which does not cause work and wastes. We use the characteristics of the primary current value of the filament transformer and the secondary load. A photo protection circuit is installed. After more than one year of use, the effect is better. Now we introduce it to everyone. A current relay on the primary string of the filament transformer, see annex