Adjusting pressure on a Cornelius ?

[Externet]

Hello.
There is an electrical switch adjustable to shut off the motor at a selected pressure. I see also an adjustment for the system relief venting.
Am I right ?
The electrical shut-off should be set to a lower pressure than the relief valve, right ?

 

[oldairdude]

That is correct, your electrical pressure switch should always be adjusted to cut off power before the relief valve setting is reached. Most often a 10% span is recommended. Thus you cannot change one without doing the other as well.