Thanks for this clarification. Hopefully I have Appa 109N, which being portable is capable of such a function.
I'd like to ask another question - regarding temperature measuring. I've noticed that K-type probe, which works Ok with my Appa 109N DMM is showing approx. +4 celcium degrees on SDM3055. I have found no way to calibrate it or do anything with this situation. Is there some procedure for changing ITS90 tables inside the device, or calibrating the probe?