307系列真空計控制器（VGC）措施pressure, ａnd utilizes pressure-related outputs to control a variety壓力，利用壓力相關(guān)的輸出控制各種of vacuum system functions ａnd processes. To fi t a wide range of真空系統(tǒng)的功能和流程。以適應(yīng)廣泛的needs ａnd applications, the 307 VGC is available in a variety of的需求和應(yīng)用，307 VGC在各種可confi gurations ａnd prices. In its simplest form the 307 VGC runs結(jié)構(gòu)配置和價格。在其*簡單的形式307 VGC運行a single ionization gauge (IG) in the range from 1 x 10-10 to 1 x一個單一的電離規(guī)（IG）的范圍從1×10-10 1 x10-1 Torr. With available modules the 307 controls four gauges,10-1乇。與現(xiàn)有的模塊307控制四個真空計，measuring pressure from 2 x 10-11 Torr to atmosphere, ａnd six測量從2×10-11乇壓力的氣氛，和六process control setpoints.過程控制的設(shè)定值。

美國Granville-Phillips真空計控制器  GP 307 Stabil-lon真空計控制器描述：

•增加壓力的測量精度：by controlling emission current, tube temperature is通過控制發(fā)射電流，管溫度stabilized, thereby stabilizing thermal transpiration and穩(wěn)定，從而穩(wěn)定熱蒸騰its effects, outgassing, ａnd wall charges — each of which它的作用，除氣，和壁電荷——每一個could otherwise dramatically affect pressure readings.否則可能會極大地影響壓力讀數(shù)。

• For extended pressure range measurement capability

•延伸的壓力范圍內(nèi)的測量能力and/or prolonged tube life, emission current can be和/或延長燈管壽命，發(fā)射電流可以adjusted. (See Fig. 3).調(diào)整。

• Pressure measurements with the Convectron Gauge are

•壓力測量與對流測偏儀表largely immune to temperature changes. A temperature基本上不受溫度變化。溫度compensation device monitors the gas temperature監(jiān)測氣體溫度補(bǔ)償裝置around the sensing wire rather than monitoring a remote在感應(yīng)線而不是監(jiān)控遠(yuǎn)程outside wall temperature.外壁溫度。

• Each Granville-Phillips Convectron Gauge Tube is

•每個威菲利普斯對流測偏儀規(guī)管individually calibrated before shipment to be within在裝運前必須在單獨校準(zhǔn)± 2% of reading over most of its range.±2%超過其大部分范圍閱讀。

• To improve the accuracy of pressure measurements,

•提高壓力測量的準(zhǔn)確性，sensitivity can be easily adjusted, independent of靈敏度可調(diào)，獨立的emission, to match gauge tube calibration.排放，符合規(guī)管的校準(zhǔn)。• Studies1 have shown Bayard-Alpert type gauges to be研究表明•貝亞德阿爾珀特型儀表是30 to 40% inaccurate. Although the 307 VGC will very30到40%不準(zhǔn)確。雖然307 VGC很accurately measure the ion current, these inaccuracies準(zhǔn)確測量的離子電流，這些錯誤are inherent in the design of the B-A gauge ａnd cannot在B-A規(guī)不能固有的設(shè)計be consistently compensated for by any IG controller.始終得到補(bǔ)償?shù)娜魏蚊庖呖刂破鳌?/span>

• RF immunity

•RF免疫- High quality shielded cables are used between the高質(zhì)量使用屏蔽電纜之間的control unit ａnd power supply, ａnd to the gauge tubes.控制單元和電源，以規(guī)管。- To help prevent electrical disturbance, RF filters are-有助于防止電氣干擾，射頻濾波器used at critical junctions.用在關(guān)鍵路口。

• Less circuit drift ａnd greater pressure measurement

•較少的電路漂移和更大的壓力測量accuracy are achieved with a lower temperature rise in精度和較低的溫度上升，達(dá)到the instrumentation enclosure by removing the power通過消除電力儀器儀表外殼supply from the vicinity of the control unit. (See Figure 4).從控制單元附近的供應(yīng)。

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