[Elecraft] [K2] Current setting?

[Mike-WE0H]

What should I have my Current setting set at? I see it occasionally 
showing high current when running SSB on the bench into a 50 ohm load. 
Is this some sort of current limiting setting for the power amp? It was 
set at 2.x amps and I set it to ~3.5a tonight and noticed the 160m power 
shot up to 10w on the Bird meter after that. Before moving the current 
setting up, it would show maybe 2-5w output just talking into the mic. I 
run the compression at 2:1 and the other setting at 3. I think I am 
saying that right but I am a newbie to this rig so...hi hi...
Also using a Kenwood MC-43S mic. The audio sounds clean listening on a 
TS-440 on all bands 160 thru 10m, skipping 30m of course...

Thanks much,
Mike
WE0H
K2 S/N 6698