我厂自制一台超低频正弦波发生器,这种仪器能够输出一定周期的正弦波电信号。用它代替热电偶接入电子电位计中使用,可以对经过修理后的电子电位差计做较长时间的运行试验,能检查仪表记录线条是否均匀,曲线是否平滑,记录走线速度是否在允 I made a factory ultra-low frequency sine wave generator, this instrument can output a certain period of sine wave electrical signals. Use it instead of thermocouple access to the electronic potentiometer used, you can repair the electronic potentiometer for a longer period of time to run the test can check the instrument record lines are uniform, the curve is smooth, record alignment speed is allowed