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一、 安装前的准备
工作环境基本要求：CT装置是有X线技术、计算机技术、自动控制技术等近代高技术成果组成。因此，对电源、温度、湿度、无尘净化等工作环境有较高的要求。
一、CT machine installation First, the pre-installation preparation
Work environment basic requirements : CT devices are high-tech achievements of modern X-ray technology, computer technology , automatic control technology and other components. Therefore, the power supply , temperature, humidity , dust-free clean work environment have higher requirements。
1.温度
CT机通电工作时，元器件与周围化境进行热交换，器件内的温度要比周围环境的温度高，应及时散发出去，以免达到或超过元器件的最高热容量。为此，CT机房内应配备空调设备，空调机的制冷量要考虑机器的产热量与室内空间的所需降温量，此外，换需考虑机器的通风散热条件和方式，通常情况下，计算机的温度以18—22度C为宜。
1 . Temperature
CT machine is energized when working components by heat exchange with the surrounding sublimation temperature of the device than in the ambient temperature is high, to be dissipated in time , to avoid reaching or exceeding the maximum heat capacity of the components . To this end, the CT room should be equipped with air-conditioning equipment , air conditioners cooling capacity required to consider the amount of cooling heat production machines and interior space , in addition , for the need to consider the conditions and modalities of ventilation machines , under normal circumstances , the computer's temperature to 18-22 degrees C is appropriate.
2.湿度
CT机的工作环境要求干燥，湿度通常要求保持在40%--65%。湿度过小，会导致某些材料及结构的几何形变和性能变化，如扭曲、断裂，造成机器故障、湿度过高，会导致元器件性能变坏、精密机械部件生锈而降低精度，缩短其使用寿命。特别是当环境温度发生急剧变化，或夏季长时间停止空调后，室温升高，再次开空调，室温又急据下降，此时会有很多水分疑结在电器元件的表面，必须进过一段时间的通风蒸发后才能通电工作。在我南方潮湿地区，还应加装除湿机，才能保证机器对湿度的要求。
2 humidity
Work environment requires CT machine dry, humidity is usually required to maintain at 40% - 65%. Humidity is too small , it will lead to geometric deformation and properties of certain materials and structural changes , such as the twisted, broken , causing malfunction , excessive humidity can cause performance deterioration components , precision machine parts to rust and degrade the accuracy and shorten its life. Especially when the ambient temperature change drastically Or stop after a long summer air conditioning , temperature rise, open air again , at room temperature , anxious According to decline , this time there will be a lot of moisture in the electrical components of the suspect junction surface , after a period of time must be ventilated into the evaporator to power work. In my southern humid region , but also the installation of dehumidifiers, to ensure the machine humidity requirements.
3.电源
CT机不仅要求电源提供足够大容量功率，而且要求工作频率稳定。因此，各种类型的CT机对电源电压和电源频率都有明确的要求，电源电压的变化范围一般应小于正负5%，如果电源电压和电源频率波动超过允许范围，不仅会妨碍CT机的正常工作，而且还可能造成故障。为确保CT机的正常工作，CT机的电源，最好采用专线，专用变压器，避免以电源电压变化大负载共线。最好安装一台自动调压的交流稳压电源及过保护装置，这样可保护CT机免受外界突变电压的影响。在计算机系统最好安装一台不间断电源（UPS），以免突然停电的影响。电源地线：电源变压器功率要求不应小于设备要求，电源电阻小于0.3欧，地线接地电阻小于4欧。采用铜质接地干线，线径不应小于16mm平方。
3 Power
CT machine not only requires high-capacity power supply to provide adequate and stable operating frequency requirements . Therefore , various types of CT machines for supply voltage and power frequency has clear requirements , supply voltage range should generally be less than plus or minus 5 %, if the power supply voltage and frequency fluctuation exceeds the allowable range, the machine will not only hinder CT work , but also may cause a malfunction. To ensure proper operation of the CT machine , power CT machine , preferably dedicated , special transformers , power supply voltage variations avoid large load collinear. Best to install an automatic voltage AC power supply and over- protection devices , which can protect the machine from outside CT mutation voltage impact. In the installation of a computer system best uninterruptible power supply (UPS), in order to avoid a sudden power outage affected. Power ground : not less than the power requirements of the power transformer equipment requirements , power resistance is less than 0.3 in Europe, ground to ground resistance of less than 4 ohms. Using copper grounding lines, diameter not less than 16mm square .
4.防尘
防尘是电气设备的共同要求。静电感应可使灰尘附着于元器件表面，既影响元器件的散热，又影响其电气性能。尤其是磁盘机，必须要有一个清洁的工作环境，其原因在于磁盘机除本身的逻辑线路外，还有许多精密的机械，如盘面、电机、光栅定位系统、磁头等。磁盘机在工作时，磁头是浮动的，读写头与盘面的浮动间隙极小（近几个微米），因此，严格防尘，保持CT室内良好的清洁度，对CT机的正常工作十分重要。
4 Dust
Dust is the common requirements for electrical equipment. Electrostatic induction components attached to the surface of the dust can not only affect the cooling components , and affects its electrical properties. In particular, the disk drive must have a clean working environment , the reason is that in addition to the disk drive itself, logic circuits, there are many sophisticated machinery, such as disk , motors, grating positioning system , heads and so on. In operation the disk drive , the magnetic head is floating , the floating gap between the head and the disk surface is minimal ( near several microns ) , so dust strictly maintain good indoor cleanliness CT , CT machine work is important for .
河南 新安 人民医院 器械科 王工
补充内容 (2014-9-7 13:00):
错发了、忘掉了转（什么名称、什么域）失误，没细看贵站的选择格式。学习了。 |
