calm my fear. first oil change as owner

[stateofidleness]

hey fellas,
got my first oil change as a box owner yesterday (5k miles since last)

I filled up today at the gas station and waited for it to do its little oil measuring thing. It only stayed at 1 bar?!!

I had no temp problems (indicated by the gauge) and no dummy lights, strange smells, strange noises. Drove it to work just fine.

So a couple questions.
1. Is this 'normal'? after an oil change?
2. What SPECIFICALLY triggers the oil fill check (nozzle in gas filler, gas cap being removed, etc) so that I can replicate it without refilling
3. What was the HVAC 'hack' thing where you could read your oil temps on the ac readout?

Thanks!