Priest:
While appreciate the helpful discussion above i have been probably not quite clear as many of you are missing my point. This was a theoretical question, so forget about the actual figures, they are just an example.I will try to reword:
What is the actual temperature of the blown in air in comparison to the setpoint?
Fair point…
No one has directly answered that.
If you set +4 it’ll blow +4. It won’t make allowances or give tolerances because it has only one instruction…+4.
What that temperature of blown air does to your cargo depends on many different factors. In most UK chilled operations which are short trips, set what your boss tells you and load it.