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西门子Mingograf 62型生理记录仪常有按下停止(stop)按键后喷笔仍然喷墨的故障,有时甚至一打开主机电源开关就喷墨。这种生理记录仪,要求在一定的走纸条件下,喷笔有与之相应的墨水压力。当压力过高时,压力放大器V1(6)输出高电平,V5(10)输出低电平,V11截止(见附图)。V1(6)输出的高电平还使V4(6)输出高电平。在按下走纸(start)键时,P1:24端送入高电平给V5的4端。由于V5的3、4端均为高电平,因而使由V6或非电路组成的多谐振荡器产生的方波(33-20H_2)得以顺利地通过V5和V7输送给V12和V13,使三通电磁阀按方波脉冲的频率一吸一放地动作,从而使墨水缓缓流
Siemens Mingograf 62 physiological recorder often press the stop button (pen) is still inkjet inkjet failure, and sometimes even open the host power switch on the inkjet. This physiological recorder requires that the pen has a corresponding ink pressure under certain conditions of feeding. When the pressure is too high, the pressure amplifier V1 (6) output high, V5 (10) output low, V11 deadline (see photo). The high output of V1 (6) also forces V4 (6) high. When the start button is pressed, P1: 24 terminal sends high level to V4 terminal. Since the V5 3,4-terminal are high, so that by the V6 or non-circuit circuit consisting of multivibrator generated square wave (33-20H_2) is passed through V5 and V7 to V12 and V13, so that the three Through the solenoid valve according to the square wave pulse frequency of a suction action, so that the ink flow slowly