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We appreciate your patience as we improve our online experience.
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可能不小心用 Differential mode 去量這個訊號了. 把 Differential mode 改成 RSE mode 可能可以解決這個問題. 如果你使用 LabVIEW, RSE是DAQmx Create Channel VI 的 input terminal configuration 的一個選項. 如果你使用 C, 你可以在 DAQmxCreateAIVoltageChan 這個 function裡將 terminalConfig 參數設定為 DAQmx_Val_RSE.
參考附件JPEG說明如何使用 NI-DAQmx VI 來將裝置設定為 RSE mode
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