2253iX California Power Supply USB Communication Issue FIXED

[dosinski]

I figure I would post this in the event someone else runs into the same issue.

When trying to communicate to an 2253iX California three phase power supply through USB using labVIEW, it would always fail in the initalization block, when asking the unit for the model ( *IDN? ). The display on the instrument would display Error -113 "Undefined Header" Turns out the USB Com port driver doesn't work when registered as COM9 or greater. It has to be COM0 through COM8. Uninstalling a device in that range and reassigning the power supply's COM fixed the issue.

[RTSLVU]

not surprising... 

I have been using California Instruments 5001iX AC source and 3091LD AC load for years and communications (RS-322, GPIB, USB)  have always been hit and miss when answering an *IDN? query.

Even the newer series 2 models have these issues, but seemingly only with *IDN? query.

I just put a loop in to query it several times before giving up.

Also I have found Ci's set of IVI vi's are usless crap and have made my own using SCPI that work a lot better.

What really makes me sad is Ci is still far superior than Elgar when it comes to AC power sources.