|
一、安裝前的準(zhǔn)備 工作環(huán)境基本要求：CT裝置是有X線技術(shù)、計(jì)算機(jī)技術(shù)、自動控制技術(shù)等近代高技術(shù)成果組成。因此，對電源、溫度、濕度、無塵凈化等工作環(huán)境有較高的要求。 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.溫度 CT機(jī)通電工作時，元器件與周圍化境進(jìn)行熱交換，器件內(nèi)的溫度要比周圍環(huán)境的溫度高，應(yīng)及時散發(fā)出去，以免達(dá)到或超過元器件的最高熱容量。為此，CT機(jī)房內(nèi)應(yīng)配備空調(diào)設(shè)備，空調(diào)機(jī)的制冷量要考慮機(jī)器的產(chǎn)熱量與室內(nèi)空間的所需降溫量，此外，換需考慮機(jī)器的通風(fēng)散熱條件和方式，通常情況下，計(jì)算機(jī)的溫度以18—22度C為宜。 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.濕度 CT機(jī)的工作環(huán)境要求干燥，濕度通常要求保持在40%--65%。濕度過小，會導(dǎo)致某些材料及結(jié)構(gòu)的幾何形變和性能變化，如扭曲、斷裂，造成機(jī)器故障、濕度過高，會導(dǎo)致元器件性能變壞、精密機(jī)械部件生銹而降低精度，縮短其使用壽命。特別是當(dāng)環(huán)境溫度發(fā)生急劇變化，或夏季長時間停止空調(diào)后，室溫升高，再次開空調(diào)，室溫又急據(jù)下降，此時會有很多水分疑結(jié)在電器元件的表面，必須進(jìn)過一段時間的通風(fēng)蒸發(fā)后才能通電工作。在我南方潮濕地區(qū)，還應(yīng)加裝除濕機(jī)，才能保證機(jī)器對濕度的要求。 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.電源 CT機(jī)不僅要求電源提供足夠大容量功率，而且要求工作頻率穩(wěn)定。因此，各種類型的CT機(jī)對電源電壓和電源頻率都有明確的要求，電源電壓的變化范圍一般應(yīng)小于正負(fù)5%，如果電源電壓和電源頻率波動超過允許范圍，不僅會妨礙CT機(jī)的正常工作，而且還可能造成故障。為確保CT機(jī)的正常工作，CT機(jī)的電源，最好采用專線，專用變壓器，避免以電源電壓變化大負(fù)載共線。最好安裝一臺自動調(diào)壓的交流穩(wěn)壓電源及過保護(hù)裝置，這樣可保護(hù)CT機(jī)免受外界突變電壓的影響。在計(jì)算機(jī)系統(tǒng)最好安裝一臺不間斷電源（UPS），以免突然停電的影響。電源地線：電源變壓器功率要求不應(yīng)小于設(shè)備要求，電源電阻小于0.3歐，地線接地電阻小于4歐。采用銅質(zhì)接地干線，線徑不應(yīng)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.防塵 防塵是電氣設(shè)備的共同要求。靜電感應(yīng)可使灰塵附著于元器件表面，既影響元器件的散熱，又影響其電氣性能。尤其是磁盤機(jī)，必須要有一個清潔的工作環(huán)境，其原因在于磁盤機(jī)除本身的邏輯線路外，還有許多精密的機(jī)械，如盤面、電機(jī)、光柵定位系統(tǒng)、磁頭等。磁盤機(jī)在工作時，磁頭是浮動的，讀寫頭與盤面的浮動間隙極小（近幾個微米），因此，嚴(yán)格防塵，保持CT室內(nèi)良好的清潔度，對CT機(jī)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 . 以上有關(guān)醫(yī)療儀器維修知識由安泰儀器維修網(wǎng)整理發(fā)布，更多有關(guān)儀器維修知識歡迎訪問安泰儀器維修網(wǎng)（medical.agitekservice.com） |
