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对NI 435X温度记录仪来说，用什么样的电压输入范围的测量精度最高？
硬件: Modular Instruments>>High-Precision DAQ (Dataloggers)>>DAQPad-4350 for USB, Modular Instruments>>High-Precision DAQ (Dataloggers)>>PXI-4351, Modular Instruments>>High-Precision DAQ (Dataloggers)>>PCI-4351, Modular Instruments>>High-Precision DAQ (Dataloggers)>>PC-4350, Modular Instruments>>High-Precision DAQ (Dataloggers)>>DAQCard-4350, Modular Instruments>>High-Precision DAQ (Dataloggers)>>DAQPad-4352 for USB, Modular Instruments>>High-Precision DAQ (Dataloggers)>>DAQPad-4351 for IEEE 1394
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问题: NI 435X温度记录仪有多种输入范围选择，其中一些会比另外一些的精度更高。用什么样的电压输入范围，测试精度最高呢？
解答: NI 435X记录仪的最高精度范围是2.5V或者更小。这是因为仪器放大器会工作在两种不同的状态下。当输入范围被设置在大于2.5V时，记录仪的放大器会把输入电压除以6来满足最后15V的输入电压范围。但是，当输入范围小于等于2.5V时，放大器不会把输入电压除6，因而更加精确。
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报告日期: 05/01/2000
最近更新: 06/11/2004
文档编号: 1X0F7L3E