ctdcal.equations_sbe.wetlabs_cstar

ctdcal.equations_sbe.wetlabs_cstar(volts, coefs, decimals=4)[source]

SBE equation for converting C-Star transmissometer voltage to light transmission. SensorID: 71

Parameters

  • volts (array-like) – Raw voltage

  • coefs (dict) – Dictionary of calibration coefficients (M, B, PathLength)

Returns

  • xmiss (array-like) – Light transmission [%]

  • c (array-like) – Beam attenuation coefficient

Notes

M and B can be recalculated in the field by measuring voltage in air (A1) and voltage with the path blocked (Y1):

M = (Tw / (W0 - Y0)) * (A0 - Y0) / (A1 - Y1) B = -M * Y1

where A0, Y0, and W0 are factory values. For transmission relative to water, set Tw = 100%.

See Application Note 91 for more information.