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我有一个关于编程34410A以及可能是34461A的问题。
我正在使用带有SCPI命令的阻力自动量程,并且我得到的读数与使用BenchVue的自动量程结果不匹配。 我似乎没有选择相同的电阻范围。 是否有可能找出BenchVue正在使用的命令?编辑者:VegiTech于2014年10月13日下午4:53 以上来自于谷歌翻译 以下为原文 I have a question about programming a 34410A and probably the 34461A. I am using Resistance auto ranging with SCPI commands and the readings I get back do not match Auto Range results using BenchVue. I does not appear to be selecting the same resistance range. Is it possible to find out what commands BenchVue is using? Edited by: VegiTech on Oct 13, 2014 4:53 PM |
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查看I / O流量的最简单方法是启动Agilent Connection Expert(IO库)并启用IO Monitor(工具菜单)。
点击“开始捕获消息”,您将看到正在发生的事情。 您应该看到许多VISA调用,您可以单击它们以获得更多下面的参数数据。 我有兴趣听听你的结果。 请发送至benchvue.support@keysight.com。 谢谢! 布赖恩 以上来自于谷歌翻译 以下为原文 The easiest way to see the I/O traffic is to start up Agilent Connection Expert (IO Libraries) and enable the IO Monitor (Tools menu). Click "Start Capturing Messages" and you'll see what's going on. You should see many VISA calls, and you can click on them to get more parameter data down below. I'd be interested in hearing your results. Please send them to benchvue.support@keysight.com. Thanks! Brian |
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ws2165946 发表于 2018-11-15 13:15 这里有更多信息。 如果安装了NI VISA,除非将Agilent / Keysight VISA设置为“主要”,否则您将无法使用Connection Expert查看I / O流量。 如果NI VISA是主要的,则必须使用NI IO Trace来观察I / O流量。 无论何时更改,BenchVue都会将SCPI设置命令发送到DMM。 在启动时,BenchVue读取仪器的状态,以便它可以使用当前状态填充设置框。 当事情发生变化时,它只会向DMM发送新信息。 因此,当您选择2线欧姆时,它会立即发出该命令。 与范围信息相同。 设置好所有内容后,它会开始轮询以查看是否有任何更改以及仪器是否仍在那里。 单击“测量”或“范围”后,应尽快停止捕获,以查看实际发送的内容。 以下是一些可以解释读数差异的一般测量概念:Autozero - 消除内部热EMF和偏置电流误差。 每次测量实际上包括输入端子的测量,然后测量内部偏移电压。 从输入中减去内部偏移电压误差,以提高精度。 这补偿了由于温度引起的偏移电压变化。 要获得最大读取速度,请关闭自动调零。 这将使您的阅读速度提高一倍以上。 偏移补偿 - 启用偏移补偿后,万用表首先进行正常电阻测量,然后进行电压测量以确定输入电路中的任何偏移电压。 结果显示的测量值校正了该偏移量。 启用偏移补偿会增加测量时间。 这在100Ω,1kΩ和10kΩ范围内自动启用。 自动量程:自动量程需要一些时间,这可以让电路元件有更多的时间来稳定,这可能会导致读数差异,这取决于它的起始范围。 孔径时间/ NPLC(电源线周期数):DMM采样输入的时间长度。 更长的时间提供更高的准确性。 所有这些都改变了读取完成所需的时间,并且其中一些实际上在内部进行更改时会短暂地从电路中移除DMM。 如果被测电路受到端子断开的影响,或者需要额外的时间来稳定,这可以解释读数的差异。 以上来自于谷歌翻译 以下为原文 Here's a little more info. If you have NI VISA installed, you won't be able to see I/O traffic using Connection Expert unless Agilent/Keysight VISA is made "primary". If NI VISA is primary, you must use NI IO Trace to observe the I/O traffic. BenchVue sends the SCPI setup commands to the DMM whenever they are changed. At startup, BenchVue reads the state of the instrument so it can populate the setup boxes with the current state. It will only send new info to the DMM when something changes. So, when you select 2-wire Ohms it will immediately send that command out. Same with range info. Once everything is set, it starts polling to see if anything has changed and if the instrument is still there. You should stop the capture as soon as possible after you click on the Measurement or range to see what is actually being sent. Here are some general measurement concepts that might explain differences in readings: Autozero – Eliminates internal thermal EMF and bias current errors. Each measurement actually consists of a measurement of the input terminals followed by a measurement of the internal offset voltage. The internal offset voltage error is subtracted from the input for improved accuracy. This compensates for offset voltage changes due to temperature. For maximum reading speed, turn autozero off. This will more than double your reading speeds. Offset compensation -- With offset compensation enabled, the multimeter makes a normal resistance measurement first, followed by a voltage measurement to determine any offset voltage in the input circuitry. The resultant displayed measurement corrects for this offset. Enabling offset compensation increases measurement time. This is enabled automatically on 100 Ω, 1 kΩ and 10 kΩ ranges. Autorange: It takes time to autorange, and this can allow circuit elements extra time to stabilize, which could cause differences in readings depending on what range it started at. Aperture time/NPLC (Number of Power Line Cycles): The length of time the DMM takes to sample the input. Longer times provide more accuracy. All of the above change the time that it takes for a reading to complete and some of them actually remove the DMM from the circuit briefly as it makes changes internally. If a circuit under test is affected by having the terminals disconnected, or takes extra time to stabilize, this can account for differences in readings. |
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