采用高速、高精度放大器PXI國(guó)家儀器公司-4022(零件號(hào):779614-01)是一個(gè)6線，保護(hù)和電流PXI放大器模塊適用于數(shù)字萬(wàn)用表。高精度、高速放大器有助于微調(diào)采集信號(hào)。對(duì)于復(fù)雜PCB上并聯(lián)的電阻或電纜測(cè)試應(yīng)用，的保護(hù)功能PXI-4022允許用戶進(jìn)行基于6線的電阻測(cè)量。

該模塊具有低電動(dòng)勢(shì)、低泄漏、鍍金、實(shí)心銅輸入端子。這PXI國(guó)家儀器公司-4022是測(cè)量類別II額定設(shè)備，設(shè)計(jì)用于承載小于或等于250V的信號(hào)電壓。然而，該模塊可以安全地承受高達(dá)2500V的浪涌電壓。就其輸入和輸出特性而言PXI-4022在%3E10運(yùn)行¹⁰ω輸入阻抗，%3C 5 pA輸入偏置電流，12 V最大輸出電壓范圍和15 mA最大輸出驅(qū)動(dòng)電流。這PXI放大器模塊集成過壓保護(hù)，用于保護(hù)輸出、保護(hù)輸入“+”和保護(hù)輸入“-”端子。

該模塊的前面板有五個(gè)連接器，背面有兩個(gè)電氣等效的連接器。五個(gè)前面板信號(hào)連接器包括:保護(hù)/放大器輸出、保護(hù)/放大器正輸入、保護(hù)感測(cè)/放大器負(fù)輸入和兩個(gè)浮動(dòng)公共(LO)。兩個(gè)背面安裝的連接器代表模塊的浮動(dòng)接地。用戶可以安裝倪PXI-4022PXI機(jī)箱中的空插槽(兼容)中的模塊。該模塊可在MAX(即測(cè)量和自動(dòng)化瀏覽器)的幫助下輕松配置。

Featured with a high-speed, high-precision amplifier, the National Instruments PXI-4022 (Part Number: 779614-01) is a 6-Wire, Guard and Current PXI Amplifier Module meant for use with Digital Multimeters. The high-precision, high-speed amplifier helps fine tune signals for acquisition. For resistors connected in parallel on complex PCBs or for cable test applications, the guarding functionality of the PXI-4022 allows the user to make 6-wire based resistance measurements.

This module has low-EMF, low-leakage, gold plated, solid copper input terminals. The National Instruments PXI-4022 is a Measurement Category II rated device, which is designed to carry signal voltages less than or equal to 250V. However, this module can safely withstand up to 2,500 V surge voltage. As far as its input and output characteristics are concerned, the PXI-4022 operates at >10¹⁰ Ω input impedance, < 5 pA input bias current, ±12 V max output voltage range, and ±15 mA max output drive current. This PXI Amplifier Module has integrated overvoltage protection for Guard out, Guard In "+", and Guard In "-" terminals.

The front panel of this module has five connectors, with two electrically equivalent connectors are provided on the back side. The five front panel signal connectors include: a Guard/amplifier output, Guard/amplifier positive input, Guard-Sense/amplifier negative input, and two Floating common (LO). The two back mounted connectors represent the module`s floating ground.  The user can install the NI PXI-4022 module in an empty slot (compatible) in a PXI chassis. This module can easily be configured with the help of MAX, I.e. Measurement & Automation Explorer.