I am testing several caps on esr on several ways, just finished the squarewave and ESR meter measurements. Measured at 120Hz, 1, 10 and 100KHz. But for the > 1000 uF caps 100KHz gwas useless, their SRF was under 100KHz so they are inductive.
Then I looked up the manul of my peak atlas ESR60. It should measure using 100KHz. But it is very strange, spend an hour measuring with a scope to see the signal. After many one shot, deep memory ect trials every measurement shows just one single pulse. If someone has that peak too, can you hook it up to a scope ?
about the Farnell caps:
One of the caps was a 3300 uF 63V, it was from Farnell but I could not remember what partnumber or brand i ordered that time, It had a M in a square on it, and that is matsushita - panasonic. Its black with grey. But there is no panasonic printed on it, but all other markings are correct for that type. Looked at the bill and indeed I ordered panasonic.
The datasheet from Farnell on your link shows the code ect. Have you looked there ? I think it is original because you ordered a FR series and that is printed on your cap.