38E: dot in upper left corner of display

[AndiGer]

From time to time I read on the forum that tantalum caps degrade, often measure right values but high ESR.

What do you suspect to be "high ESR"?

I bought new 2.2µF/16V tantalum caps and they measure values between 3.6 and 5.6 Ohms ESR (Vloss between 0.3 and 0.6%). Measured by LCR-T4 transistor tester.

So 15 Ohms I measure in an old one is high ESR or where is the border you call it high ESR?