Hi All
I have a beast of an instrument. Its an Elgar AC source, model SW5250A. The problem is an odd one. If I program it over the bus (GPIB in this case) then all phases program up fine. If I do an *IDN? query on it then it returns the model number SW1750A, which is the single phase version of the same unit. Also, from the front panel I cannot access phases B and C. I mean they are literally not there in the menu. But as stated, the physical modules are there and the bus programs them up fine.
Why has my Elgar forgotten what it is? I've replaced the memory battery and reinstalled the firmware but still nothing.
Any ideas?
Being in the UK, I'd quite like to avoid sending it back to Ametek in California. We've done this before and it's not cheap!
Can't seem to find service manuals either, only User and Programming manuals