吉時利5位半6517B靜電計/高阻表提供的精 度和靈敏度指標(biāo)高于其他同類型儀表。它還具有 完備的功能，使測量高阻和絕緣材料電阻率變得 簡單。6517B具有425讀數(shù)/秒的測試速率，比同 類型的靜電計快很多，可以提供快速、簡易的弱 電流測量能力測量弱電流。
主要特點(diǎn):
電阻測量可達(dá)1016 Ω
電流測量范圍1fA - 20mA
最小電流量程輸入端壓降<20μV
200TΩ 輸入阻抗
<3fA 偏置電流
測試速率高達(dá)425 rdgs/s
噪聲0.75fA p-p
內(nèi)置±1kV電壓源
的高電阻測量電壓反接方法
可選的插件式掃描卡
出眾的性能指標(biāo)
半機(jī)架型6517B靜電計/高阻表具有特殊的低 電流輸入放大器，其輸入偏置電流<3fA，噪聲僅 0.75fA p-p (峰-峰) ，輸入端壓降<20μV。對于 接近理想的電路負(fù)載，其電壓和電阻測量的輸入 阻抗是200TΩ。這些性能指標(biāo)確保物理、光學(xué)、納米技術(shù)和材料科學(xué)等研究領(lǐng)域低電流和高阻抗電壓、電阻和電荷測量所需的準(zhǔn)確 度和靈敏度。內(nèi)置±1kV的電壓源具有掃描能力，從而簡化漏流測試、擊穿電壓測試 和電阻測試，以及絕緣材料的體電阻率(Ω-cm) 及表面電阻率(Ω/square) 的測量。
測量范圍寬
6517B型靜電計/高阻表具有全自動量程，超過電流、電阻、電壓和電荷測量滿量程：
? 電流測量范圍：1fA - 20mA
? 電壓測量范圍：10μV - 200V
? 電阻測量范圍：50Ω - 1016Ω
? 電荷測量范圍：10fC - 2μC
改進(jìn)的高靈敏度測量
許多測試應(yīng)用要求測量高級別材料的電阻率（面電阻率和體電阻率）。傳統(tǒng)測 量方法是對樣本施加足夠高的電壓，測量流經(jīng)樣本的電流，然后利用歐姆定律(R=V /I)計算其電阻。雖然高阻材料和器件產(chǎn)生很小的電流，很難準(zhǔn)確進(jìn)行測量，但利用 吉時利靜電計和皮安計則可以成功地進(jìn)行這種測量。
即使利用高精度儀器，材料中固有的背景電流使得進(jìn)行準(zhǔn)確測量較為 困難。由于壓電效應(yīng)、電容效應(yīng)和偏振效應(yīng)，絕緣材料、聚合物和塑料通 常都顯示出背景電流。這些背景電流一般等于或大于施加電壓產(chǎn)生的電流。 在這些情況下，其測量結(jié)果往往是不穩(wěn)定的，生成不準(zhǔn)確的電阻或電阻率 讀數(shù)甚至錯誤的負(fù)值。吉時利6517B型靜電計/高阻表旨在解決這些問題， 并為各種材料和元件提供一致、可重復(fù)和精準(zhǔn)的測量，特別是與8009型電 阻測試夾具一起使用時。
The precision and sensitivity of the giselli 5-bit half-6517b electrometer/high-resistance meter is higher than other instruments of the same type. It also has complete functions, making it easy to measure high resistance and insulation material resistivity. The 6517B has a test rate of 425 readings per second, which is much faster than the same type of electrometer and provides fast and easy low-current measurement capability.
Main features:
Resistance measurement of up to 1016 Ω
The current measurement range is 1fa-20ma
Minimum current range input voltage drop <20 V
200 t Ω input impedance
<3fA bias current
Test rate as high as 425 RDGS /s
Noise fA p - 0.75 p
Built-in 1kV voltage source
Unique high resistance measurement voltage reverse connection method
Optional plug-in scan card
Superior performance metrics
The semi-chassis 6517B electrometer/high-resistance meter has a special low-current input amplifier with input bias current <3fA, noise only 0.75fA p-p (peak-to-peak), and input voltage drop <20 V. For close to ideal circuit load, the voltage and the resistance measurement of input impedance is 200 t Ω. These performance indicators ensure the accuracy and sensitivity required for low current and high impedance voltage, resistance and charge measurements in the fields of physics, optics, nanotechnology and materials science. Built-in plus or minus 1 kv voltage source with scanning capabilities, so as to simplify the leakage flow testing, testing and breakdown voltage resistance test, and the volume resistivity of insulating materials (Ω - cm) and surface resistivity (Ω/square) measurement.
Range of measurement
Type 6517B electrometer/high-resistance meter has a fully automatic range that exceeds the full range for current, resistance, voltage and charge measurements:
? current measurement range: 1fa-20ma
? voltage measurement range: 10 v-200v
? resistance measurement range: Ω Ω 50-1016
? charge measurement range: 10fc-2 C
Improved high sensitivity measurement
Many test applications require the measurement of the resistivity (surface and volume resistivity) of high grade materials. The traditional measurement method is to apply a high enough voltage to the sample, measure the current flowing through the sample, and then calculate its resistance using ohm's law (R=V /I). Although very small currents are generated by high-resistance materials and devices and are difficult to measure accurately, such measurements can be made successfully with the keithley electrometer and picoammeter.
Even with high-precision instruments, the background current inherent in the material makes accurate measurements difficult. Because of piezoelectric effect, capacitance effect and polarization effect, insulating materials, polymers and plastics usually show background current. These background currents are generally equal to or greater than the current produced by applying a voltage. In these cases, the measurement results are often unstable, generating inaccurate resistance or resistivity readings or even erroneous negative values. The keesley 6517B electrometer/high resistance meter is designed to address these issues and provide consistent, repeatable and accurate measurements for a variety of materials and components, especially when used with the type 8009 resistance test fixture.
