Virtualbench 100mA to ignore current spike

[ediva99]

Hi. Apologies if any inconvenient cause, this post was also being post in the following forum previously.

http://forums.ni.com/t5/LabVIEW/virtualbench/m-p/3171000/highlight/false#M915869 

The reason i had re-post here is by chance, found this forum and thought might be more related as it was a question on Virtualbench. 

Had a few session with NI member to try to resolve the Virtualbench issues that was mention.

Pre-condition - VirtualBench using 100mA terminal, connect in series

1. Virtualbench itself, is functional, using Joe test recommendation

2. Looking at the waveform, it seems that when measuring the DUT current, there occur transient spike that is beyond 100mA

3. Using handheld DMM (200mA range), we have no issue to read back the DUT current

4. Using VirtualBench, In our application, labview DMM read vi is within a while loop with 100ms interval. The DMM read VI are supply along with the Virtualbench

As accordance to NI members, every execution (Or every read) of the DMM read VI might takes in multiple DC values instance. If any of those values happen to be NAN, the resultant output = NAN, irregardless if that single read execution of the DMM vi has other valid DC values. The spike, as per attach might end out being read in and cause NAN to be output.

In Our case, the datalogging portion is an issues as we will end out many intervals (Can be a couple of seconds) with NAN values. The system will report that as a break in operation which is not a real case.

Is there any recommendation to overcome this in labview ? Or anyone has some modified DMM read vi which at a single read instance, disregard the NAN and returns the average for that read instance ? 

Appreciate if anyone can offer any advice or work around. Thanks in advance and also thanks to the NI members that had spent time with us trying to troubleshoot on this issue

regards

[#2]

Hi. Apologies if any inconvenient cause, this post was also being post in the following forum previously.

http://forums.ni.com/t5/LabVIEW/virtualbench/m-p/3171000/highlight/false#M915869 

The reason i had re-post here is by chance, found this forum and thought might be more related as it was a question on Virtualbench. 

Had a few session with NI member to try to resolve the Virtualbench issues that was mention.

Pre-condition - VirtualBench using 100mA terminal, connect in series

1. Virtualbench itself, is functional, using Joe test recommendation

2. Looking at the waveform, it seems that when measuring the DUT current, there occur transient spike that is beyond 100mA

3. Using handheld DMM (200mA range), we have no issue to read back the DUT current

4. Using VirtualBench, In our application, labview DMM read vi is within a while loop with 100ms interval. The DMM read VI are supply along with the Virtualbench

As accordance to NI members, every execution (Or every read) of the DMM read VI might takes in multiple DC values instance. If any of those values happen to be NAN, the resultant output = NAN, irregardless if that single read execution of the DMM vi has other valid DC values. The spike, as per attach might end out being read in and cause NAN to be output.

In Our case, the datalogging portion is an issues as we will end out many intervals (Can be a couple of seconds) with NAN values. The system will report that as a break in operation which is not a real case.

Is there any recommendation to overcome this in labview ? Or anyone has some modified DMM read vi which at a single read instance, disregard the NAN and returns the average for that read instance ? 

Appreciate if anyone can offer any advice or work around. Thanks in advance and also thanks to the NI members that had spent time with us trying to troubleshoot on this issue

regards