多传感器检测系统信号处理研究外文翻译.doc

外 文 翻 译 毕业设计题目： 多传感器检测系统信号处理研究 原文1： 911plus CTD SYSTEM OPERATING AND REPAIR MANUAL 5-1 译文1： 911plus CTD系统的操作和维修手册 5-1 原文2： 911plus CTD SYSTEM OPERATING AND REPAIR MANUAL 5-2 译文2：911plus CTD系统的操作和维修手册 5-2 1-3 TROUBLE DIAGNOSIS AND REPAIR (UNDERWATER UNIT PROBLEMS) (原文1) LIFE-THREATENING HIGH VOLTAGES ARE PRESENT IN BOTH DECK UNIT AND UNDERWATER UNIT WHEN POWER IS ON. THESE HAZARDOUS VOLTAGES PERSIST FOR UP TO ONE MINUTE AFTER REMOVAL OF POWER.. THE BEST WAY TO PROTECT AGAINST ELECTRICAL SHOCK IS TO DISCONNECT THE AC POWER CORDS FROM THE REAR PANEL OF THE DECK UNIT, THEN WAIT A FULL MINUTE BEFORE ATTEMPTING SERVICE. ALWAYS DISCONNECT THE AC POWER CORD BEFORE CHECKING FUSES!!! For protection of the circuitry, we also recommend that AC power be removed and a 1 minute period for supply capacitor discharge be allowed before opening housings, changing connections, removing or inserting circuit cards, or otherwise working on the equipment. If the data telemetry is OK (deck unit data light is on and error light off) but one or more channels is faulty, see Section 5-2 (Sensor Problems) before proceeding with work on the underwater unit; the problem may be a defective sensor. Read Section 4-1 which describes the operation of the underwater unit circuitry. Refer also to the section titled schematics which contains the underwater unit schematic diagrams. All voltages are measured relative to pin 2 of any plug-in card; this is main signal/power ground for the underwater unit. 5-1.1 UNDERWATER UNIT COMPLETELY INOPERATIVE Make sure that the deck unit is supplying the proper sea cable voltage (250 volts). If there is no sea-cable voltage, the seacable rear panel fuse may be blown. With SEARAM units, see that SEARAM i