6430靜電計

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:

• 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)確進行測量，但利用 吉時利靜電計和皮安計則可以成功地進行這種測量。

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 6430 sub-fa programmed source meter integrates the voltage and current sources and measuring functions of the gishli source meter and the source measurement unit (SMU) products, with higher sensitivity, lower noise and higher input impedance than the electrometer. This unique performance is achieved with the 6430 remote preamplifier, which provides a very sensitive bidirectional amplifier for measuring or producing the current of the device under test. The high level signal from the remote preamplifier is sent to the control unit via a 2 m long cable. This allows the user to connect directly, or closely, to the signal, reducing the impact of cable noise.

Main features:

0.4fA p-p (4e-16a) noise

The remote preamplifier can be located at the source to reduce cable noise

> 1016 Ω input impedance voltage measurements

High speed -- up to 2000 readings per second

The resolution is 6 and a half bits

Fast component feature analysis with programmable digital I/O and interface

Measure the voltage, current, and resistance at a speed that the electrometer cannot reach. It can read up to 2000 source/measurement readings per second and read them into internal memory. It can measure fast and small current. The 100nA range can respond to the signal as short as 5ms, while the larger range can respond to the signal of several hundred microseconds.

The unique features of the 6430 include its excellent low current sensitivity and remote preamplifier, which provides sensitivity by avoiding long input cables. The remote preamplifier is the main part of the 6430 feedback measurement system. Although it can be separated from the main machine by a connection cable of up to 2 meters with a high level signal, it cannot work independently of the main machine.

application

The functions of the 6430 make it equally suitable for research work in test laboratories and evaluation of complex components, as well as for combining other source measuring instruments or smus for low current, high resistance or high sensitivity semi-conductor measurements at high levels. The low noise and drift properties of 6430 are also suitable for the study of high resistivity nanowires and other high resistivity nanomaterials.

High speed data processing

6430 can read to its memory buffer at over 2000 readouts per second. The ieee-488 bus output can send up to 75 source/measurement readings per second to the external computer controller, including through/failure indication.