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RE: Real-time data acquisition: how to achieve high speed with Labview and the KEITHLEY 6485?
Thank you for your proposal but the DMM6500 will be too expensive for me. However, with the KEITHLEY 6485 I manage to have usable results with a sample that gives high current peaks. But when it comes to the samples where the current is very high, I notice that there is too much noise and I cannot distinguish certain current peaks with the noisy signals. Do you think there is a way to filter the noise without slowing down the acquisition ?<br> You will see some signals when I take my empty measurements in the attachment. -
RE: Real-time data acquisition: how to achieve high speed with Labview and the KEITHLEY 6485?
Hello Molina,<br> <br> In fact for my application I need to go much lower than 95 ms between two measurements because I can't get all my desired current peaks. I need at least 10 ms between two measurements. Since I apply constraints every 333 ms on my sample to have current peaks in order to be able to store energy. Since I cannot synchronize the test bench and the abview, the ideal would be to have the time between two measurements in 1ms to be sure that I can measure all my peaks with precision.<br> <br> <br> Do you think this is impossible with the KEITHLEY 6485 pico-ammeter? -
RE: Real-time data acquisition: how to achieve high speed with Labview and the KEITHLEY 6485?
<p>Hello Molina,                                                                                                                                                                                                          thank you for your help. However, the time between two measurements is enormous compared to my application despite my attempts to speed up the execution rate of the pico-ammeter by changing the NPLC to 0.01. Currently, I only retrieve two measurements every second.</p> <p>As a reminder, in the context of my application, I need to measure the current of piezoelectric films when they are subjected to compressions at a frequency of 7 Hz. Indeed, the time between two measurements is very important compared to my needs (I need to retrieve 100 measurements every second at least) and display them in real-time on LabView.</p> <p>However, I have an attached program that allows me to retrieve the 100 measurements every second and display them in real-time on LabVIEW. Unfortunately, these measurements do not seem correct to me, as the first measurement I retrieve is on the order of hundreds of microamps in a vacuum, while the subsequent measurements are on the order of tens of nanoamps. So from my application I will recover only some nano ampere.</p> <p>Therefore, I am looking for help in solving this problem. Any suggestions would be greatly appreciated. Thank you in advance for your help.</p> -
Real-time data acquisition: how to achieve high speed with Labview and the KEITHLEY 6485?
<p>Hello,</p> <p>I currently need help to perform a real-time acquisition of very low current data at a high speed of 100 measurements per second using Labview software and a KEITHLEY 6485 picoammeter with a GPIB.</p> <p>Currently, I use a method that allows me to read 100 measurements in one second and display them on Labview, but my goal is to display these measurements in real-time on Labview. I have included a copy of my VI for reference.</p> <p>I am looking for solutions or advice to achieve this goal. Any help would be greatly appreciated.</p> <p>Thank you in advance for your help."</p>
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