第 7 章 服务和故障排除................................................................................................................155 7.1 安全消息...............................................................................................................................155 7.2 查看诊断...............................................................................................................................157 7.3 诊断消息...............................................................................................................................159 7.4 LCD 错误消息.......................................................................................................................171 7.5 LED 错误消息.......................................................................................................................172 7.6 F OUNDATION™ 现场总线错误消息....................................................................................173 7.7 故障排除指南....................................................................................................................176 7.8 服务和故障排除工具....................................................................................................180 7.9 应用挑战....................................................................................................................211 7.10 更换变送器头部....................................................................................................................219 7.11 更换探头....................................................................................................................220 7.12 服务支持....................................................................................................................223