一台XG-200型X线机,电动床下X线管(XD4-2.9/100型)损坏,管壁有裂纹,疑为超载使用所致,换上同型号新管,进行管套排气后,用2mA,自低千伏开始,训练X线管,管内无异常,mA表指针稳定,但管套升温过快,怀疑mA值不准确。用万用表交流mA档串联在高压发生器端的中心点,在控制台上mA表为2mA时,万用表指示接近4mA,肯定前者不准确。于是近万用 A XG-200 X-ray machine, electric bed under the X-ray tube (XD4-2.9 / 100 type) damage, cracks in the pipe wall, suspected of overloading due to use, put on the same type of new tube, , With 2mA, starting from low kV, training X-tube, no abnormal tube, mA table pointer is stable, but the tube warmed too fast, suspected mA value is not accurate. Use a multimeter to exchange mA files in series at the center of the high voltage generator. When the mA meter is 2mA on the console, the multimeter indicates close to 4mA, which means the former is inaccurate. So nearly universal