故障现象心电部分正常.血流图部分为:测量部位选择开关置于“机内”,检查“平衡——工作”两状态均正常.将“封闭——观察——记录”三态开关置于“封闭”位置亦正常,当置于“观察”位置,每当开机十几分钟后,热笔开始无规律地抖动,定标、增益与零位调节均正常. Symptom ECG part is normal. Part of the blood flow diagram is: the measurement part selection switch is set to “inside the machine” and the “balance-work” state is checked. The “closed-view-record” three-state switch is set. In the “closed” position is also normal, when placed in the “observation” position, whenever the boot ten minutes later, the hot pen began to shake irregularly, calibration, gain and zero adjustment are normal.