The instrument should be calibrated in an area free of vibration or stray magnetic fields such as power lines, generators, or welding equipment.
仪器校准应在无振动区域以及无发电机，焊接设备等干扰磁场的区域进行。
2
The company has: the power installation of the division, the cause of the generators, welding machine division, power division, Construction Machinery Group, shops, technical service centres.