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嗨，我开发了一个labview程序，通过“读取GPIB”命令从3458A读取测量结果。
我将所有仪器参数/功能保留为默认值，但NPLC除外，我将其设置为1.当我测量读取速率时，执行一次读取需要约60ms。 这似乎比我预期的要长得多。 当我关闭自动调零功能时，执行一次读取仍需要40ms。 手册提到我应该期望每秒约60个读取，大约20ms。 我究竟做错了什么？ 以上来自于谷歌翻译 以下为原文 Hi, I developed a labview program to read measurements from the 3458A via "read GPIB" command. I left all instrument parameters/features in default value, except for NPLC where I set it to 1. When I measured the reading rate, it takes ~60ms to perform one reading. This seems to be much longer than what I expected. When I turned the autozero function off, it still takes 40ms to perform one reading. The manual mentions that I should be expecting ~60readings per second, which is about 20ms. What am I doing wrong? 
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嗨，谢谢你的快速回复！ 附件是我在Labview中计算执行时间所做的。 HP3458A通过GPIB-USB连接连接到我的电脑。 我试图进行单次DCV测量。 写入万用表大约需要3秒钟。 从万用表读取大约需要40秒。 最终我的目标是收集大约65K的数据。 读取速度低，完成收集65K数据大约需要一个小时！ 你的转学时间是什么意思？ 对不起; 我是labview和HP3458A的新手。 以上来自于谷歌翻译 以下为原文 Hi, THANK YOU for your prompt reply! Attached was what I did to calculate execution time in Labview. The HP3458A was connected to my pc via GPIB-USB connection. I was trying to perform a single DCV measurement. Writing to the multimeter took about 3 seconds. Reading from the multimeter took about 40 seconds. Ultimately my goal is to collect about 65K data. With the low reading speed, it takes about one hour to finish collecting 65K of data! What do you mean by transfer time? I am sorry; I am new to labview and HP3458A. 附件 |
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万用表可能能够读取多个读数，然后将它们分组传输，这样您的测量时间就不会那么大。 当控制万用表时，您的软件将通过GPIB端口发送和接收数据，每次发送都会有一些开销数据，这意味着如果您发送和接收的开销数据可能比您感兴趣的数据大很多。但是 如果让万用表读取多个读数并收集它们，则需要接收的次数较少。 它有意义吗？ 以上来自于谷歌翻译 以下为原文 The multimeter might be able to take multiple readings and then you transfer them in groups, that way your measurement time is not suffering so much. When controlling the multimeter your software will send and receive data over the GPIB port, there is a bit of overhead data for each sending that means if your sending and receiving many times your overhead data might be larger then the data you are interested in. But if you let the multimeter take multiple readings and collect them, you need to receive less number of times. Did it make sense? |
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