這鎳SCXI-1540(零件號:777966-40)是一個線性可變差動變壓器或者線性差動變壓器 組件，具有所需的信號調(diào)理功能，可測量來自基于變壓器的比率式位置傳感器的信號，如LVDTs、旋轉(zhuǎn)可變差分變壓器(RVDTs)和旋變器等。該模塊具有用于LVDTs和RVDTs的4線和5線連接。當該模塊在SCXI系統(tǒng)中實施時，用戶可以掃描的模擬輸入通道SCXI-1540模塊以及其他模塊，速率高達333 kS/s。還有一個隨機掃描功能，允許用戶選擇他們希望獲得信息的特定頻道。

此外SCXI 1540通過NI-DAQ或LabVIEW VI具有自動校準功能，無需外部硬件。用戶無需拆下傳感器接線即可完成自動校準。輸出在內(nèi)部繞回到輸入，使用戶能夠評估激勵和輸入電路中的誤差。來自自動校準的校正常數(shù)保存在每個模塊的EEPROMs中。NI-DAQ驅(qū)動軟件利用常數(shù)來調(diào)整每個通道的增益和失調(diào)誤差。

上的增益、電平、有線模式和頻率鎳SCXI-1540為每個通道設(shè)置，不需要使用跳線。該模塊可通過測量和自動化瀏覽器(MAX)或NI-DAQ函數(shù)調(diào)用進行配置。此外，用戶可以選擇任意數(shù)量的通道來同步到相同的頻率。

The NI SCXI-1540 (Part Number: 777966-40) is a Linear Variable Differential Transformers or LVDT Module, which has the required signal conditioning to measure signals from transformer-based ratiometric position sensors, such as LVDTs, rotary variable differential transformers (RVDTs), and resolvers. This module has 4 and 5-wire connections for LVDTs and RVDTs. When this module is implemented into an SCXI system, the user has the capability to scan the analog input channels of the SCXI-1540 module, as well as other modules, at rates as fast as 333 kS/s. There is also a random scanning function, which allows the user to choose the specific channels from which they wish to obtain information.

Furthermore, the SCXI 1540 has an autocalibration feature through NI-DAQ or LabVIEW VI without the need for external hardware. The user does not need to detach sensor wiring to complete an autocalibration. The output is internally wrapped back to the input, enabling the user to take stock of errors in excitation and input circuitry. The correction constants from the autocalibration are saved in the EEPROMs found on every module. The NI-DAQ driver software utilizes the constants to adjust for the gain and offset blunders of every channel.

The gain, level, wire mode, and frequency on the NI SCXI-1540 are set for each channel and do not require the use of jumpers. This module can be configured with Measurement & Automation Explorer (MAX) or with function calls to NI-DAQ. In addition, the user can choose any quantity of channels to synchronize to the same frequency.