PXI-6120 AI values show low limit values only

[Paul-D · Accepted solution]

Olli, you will have to speak with our RMA coordinators on what info will be provided to you.  Also, it will probably be best if you reference this thread when you call in as evidence of the troubleshooting you've already done.

Thanks,

[Olli]

Hello Paul,

thanks for the reply! Yes I've got already contact with our local NI representatives and sent the link to this thread. I'm really very curious about the reason of the failure.

Although it is very unlikely, that some signal out of range entered the analog output channel, I'm starting now to look for a fast galvanic signal separation similar to the

voltage and current transducers I use for the input channels (LEM CT10, 500 kHz: input +- 10 A, output = +- 10V and LEM CV 3-200, 300 kHz, input +-200V, output +- 10V).

If anyone can give me a hint about a similar device but with an input voltage of +- 10V and an output voltage of +- 10V with a frequency bandwith of around 300 kHz, I would be very happy!

Greetings!

Olli

[Paul-D]

Olli, I am glad to hear you've gotten the RMA process going.  Unfortunately we as Application Engineers don't have much knowledge about the sensors available per your question.  You will probably get more responses on this issue from the rest of community if you start a new thread specifically addressing that question.

[Olli]

Hello,

I just received the board back from the factory test. A fuse was blown (F1). Now it's repaired and recalibrated, but before I will install it to my application, I'd like to find out what happened. I have a rough guess, that this could have happened during switching on the device, that is permanently connected on the AO of the PXI-6120.

I it's feasible I will connect an osci to the voltage input of this device and see the signal during switching. If I find out more, I'll let you know!

Ciao!

Olli

[Paul-D]

Olli, it would be difficult to exactly pinpoint the cause of your problem.  As we said before, be careful in the future to not call DAQmx and Traditional DAQ calls at the same time.  Additionally, check the 6120 Specifications to make sure you aren't exceeding the specifications of your device.  Additionally, consider that during switching, you can sometimes experience spikes in voltage.  It could be any of those things, or just that the fuse reached the end of it's life due to normal operation.