這倪SCXI 1321(零件號(hào):777687-21)是應(yīng)變計(jì)、RTD或熱敏電阻應(yīng)用的理想選擇。該型號(hào)非常適合具有大量通道的溫度或電壓應(yīng)用。這高壓接線板被屏蔽以允許快速、可靠的信號(hào)連接。這SCXI-1321將零點(diǎn)校準(zhǔn)和分流校準(zhǔn)引入SCXI-1121應(yīng)變儀應(yīng)用，但只能與SCXI-1121模塊版本C或更高版本。上有18個(gè)螺絲端子鎳SCXI-1321。

還有一個(gè)前面板調(diào)整電位計(jì)，允許用戶手動(dòng)調(diào)零失調(diào)電壓或橋接傳感器。每個(gè)通道都有分流校準(zhǔn)電路，可通過軟件作為一組進(jìn)行控制。用戶也可以觸發(fā)上的開關(guān)SCXI 1321接線板將一個(gè)301 k歐姆的分流電阻與應(yīng)變計(jì)并聯(lián)。上的調(diào)零和分流電阻接線盒是套接的，因此用戶可以輕松地對(duì)其進(jìn)行定制。

失調(diào)零點(diǎn)校準(zhǔn)是一種硬件零點(diǎn)校準(zhǔn)過程，惠斯通電橋傳感器具有初始失調(diào)誤差。修正該誤差將提高測量精度。上的調(diào)零電路SCXI-1321可用于四分之一橋、半橋和全橋應(yīng)變儀配置。每個(gè)通道都有獨(dú)立的調(diào)零電路，以及指定的調(diào)整電位計(jì)。例如，通道0對(duì)應(yīng)于電位計(jì)R1。通道1對(duì)應(yīng)于電位計(jì)R2。接下來，通道2對(duì)應(yīng)于電位計(jì)R14。最后，通道3對(duì)應(yīng)于電位計(jì)R15。

The NI SCXI 1321 (Part Number: 777687-21) is ideal for applications with strain gauges, RTDs, or thermistors. This model is well-suited for temperature or voltage applications with a high quantity of channels. This High-Voltage Terminal Block is shielded to allow swift, reliable signal connections. The SCXI-1321 brings nulling and shunt calibration to SCXI-1121 strain gauge applications but can only be used with the SCXI-1121 module revision C or later. There are 18 screw terminals on the NI SCXI-1321.

There is also a front-panel trimming potentiometer, which enables the user to manually null out the offset voltage or bridge transducers. Every channel has shunt calibration circuits that can be controlled as a group via software. The user can also trigger a switch on the SCXI 1321 Terminal Block to link a 301 k Ohm shunt resistor in parallel with the strain gauge. The nulling and shunt resistor on the Terminal Block are socketed, so they can be customized by the user with ease.

Offset nulling is a hardware nulling process with Wheatstone-bridge transducers that have an initial offset error. Fixing this error will increase measurement preciseness. The nulling circuitry on the SCXI-1321 will work with quarter-bridge, half-bridge, and full-bridge strain-gauge arrangements. Every channel has separate nulling circuitry, as well as a designated trimming potentiometer. For example, Channel 0 corresponds to Potentiometer R1. Channel 1 corresponds to Potentiometer R2. Next, Channel 2 corresponds to Potentiometer R14. Finally, Channel 3 corresponds to Potentiometer