That's it! My brain is empty.
Oh.., if you want you can load the transformer up to 40% and measure (with your Fluke 2060) real power on both sides (input and output) and calculate the total loss (substracting). You can also use that instrument to measure the KVA in open circuit (the 6500 you were referring) to see the real magnitude of the core losses (no-load losses).
But if you are like me, without a penny in your pocket for a Fluke 2060 or similar, you can always use a normal True-RMS clamp meter and make the measures of voltages and currents to calculate KVAs, KWs and KVARs with pencil and eraser. If need some help with that just let me know.
Regards,
Joe.-
