deri_seapres - derivation of sea pressure from absolute pressure

The sea pressure (also referred to as hydrostatic pressure) is simply the difference between pressure measured underwater and atmospheric pressure.

We don't have a way to export this macro.

In the form used by the logger, using an RBRconcerto³ C.T.D as an example, this becomes:

We don't have a way to export this macro.

n0 is the label of the pressure channel, pressure_00 in the example.
n1 is the label of the atmospheric pressure channel; not present in the example (default value, refer to parameters atmosphere).

Examples

CODE

>> calibration seapressure_00 equation
<< channel seapressure_00 equation=deri_seapres

Confirm the equation type.

CODE

>> calibration seapressure_00
<< calibration seapressure_00 datetime=20251001000000 equation=deri_seapres offset=0.0000000e+000 slope=1.0000000e+000 n0=pressure_00 n1=value

Request confirmation of all calibration coefficients.