I'm not familiar with the 1hz but a rule of thump is: rpm / 1000 in bar oil pressure
Idle at 600min-1 -> 0.6bar oil pressure (maybe 7.5PSI)
1500min-1 -> 1.5bar or 22PSI
3000min-1 -> 3 bar or 45PSI
often the limits by the manufacturer are a little bit lower, so the upper values are on the...