内燃机车使用的装有永久磁铁的仪表有主发电机电压、电流表,辅助发电机电压表,蓄电池组充放电电流表,电阻制动电流表,机车半导体速度表以及机车配用的—○八型万用表……。这些仪表,在机车运行中经常受到周期性的震动和突然刹车的冲击,而使磁性衰退,使仪表的灵敏度降低,为了让仪表在原有的技术条件下运用,过去我段采用改变测量机构的其它元件或改变测量线路来修复,例如:更换游丝、重磨轴尖,增绕动圈匝数等,这样做技术要求很高,工作复杂,同时这样检修的仪表使用可靠性也很差。为提高检修质量,仪表小组的广大革命职工同技术人员一道共同研究,制做成功直流两 The permanent magnet used in diesel locomotive has the main generator voltage, ammeter, auxiliary generator voltmeter, battery charge and discharge ammeter, resistance brake ammeter, locomotive semiconductor speedometer and locomotive equipped with - ○ eight multimeter ... .... These instruments in the locomotive operation is often subject to periodic shocks and sudden braking impact, leaving the magnetic decay, so that the sensitivity of the instrument lower, in order to allow the instrument under the original technical conditions, in the past I use to change the measurement of other institutions Components or to change the measurement line to repair, for example: replacement of hairspring, re-grinding the shaft tip, the number of windings around the coil, etc., so that technical requirements are high, complex work, and maintenance of the instrumentation is also very poor reliability. In order to improve the quality of overhaul, the vast majority of revolutionary workers and staff members of the instrument team work together with technicians to make successful DC two