夜夜撸夜夜操,亚洲一区二区三区四区五区,日本一区二区在线,亚洲视频一区二区三区,日韩在线视频www色,草蜢在线观看日本,午夜欧美在线视频免费视频看

Definition of Basic Parameters of NTC Thermistor Products

發(fā)布時(shí)間:2019-05-28 11:19:00 瀏覽次數(shù):555


    Thermistor

A thermistor is a thermally sensitive semiconductive resistor whose resistance changes with its temperature.

    Negative Temperature Coefficient Thermistor

NTC thermistor is a kind of ceramic semiconductive thermal sensitive crystal sintered from manganese, cobalt, nickel-based variety of metal oxides, whose zero-power resistance decreases while its temperature increases.

    Zero-power Resistance(RT)

The zero-power resistance of a thermistor is the direct current resistance value measured at a specified temperature “T” with power dissipation by the thermistor low enough that any further decrease in power will result in less than 0.1% change in resistance.

    Material Constant(B)

B constant is a value calculated by the following formula under two specified ambient temperature (Expressed in degrees kelvin K):

B=Ln(R1/R2)/(1/T1-1/T2)

The reference temperature used in this formula for determining B constant of QAM thermistor is 298.15K and 323.15K or 358.15K.Generally B=20006000K, the greater the B constant is, the greater the resistance change rate per 1℃ is.

    Dissipation Factor (δ)

The dissipation factor is the required power which makes the NTC thermistor body temperature raise 1℃ through self-heated, normally expressed in milliwatts per degree Celsius (mW/℃). It can be calculated by the following formula:

δ = V×I / (T-T0)

 

    Thermal Time Constant(τ)

The thermal time constant is the time required for a thermistor under zero-load condition to change 63.2% of total difference between its initial and final body temperature when the ambient temperature changed dramatically, normally expressed in second(S).





1560753834376097.png

 



南昌县| 佛坪县| 康保县| 横山县| 二手房| 钦州市| 盱眙县| 千阳县| 乐清市| 河西区| 广平县| 朝阳县| 定南县| 西乌| 龙川县| 东乡族自治县| 巢湖市| 玉溪市| 阿克苏市| 定陶县| 来安县| 休宁县| 乌鲁木齐县| 鲁甸县| 弥渡县| 桂林市| 利津县| 三明市| 宁乡县| 昌乐县| 长汀县| 定南县| 长子县| 宣武区| 塔城市| 定州市| 武安市| 治多县| 盐城市| 射阳县| 凌源市|