On 30 June, 2015 - Stan wrote:
Hi,
Does anybody know how to configure lidivecomputer in order to get depth in fresh water. (Assuming it calibrated for salted water). For the Reefnet Sensus Ultra, I get the raw pressure and then I compute the depth.
I guess there is something to change in units.h ?
Looking at the code, you can adjust the calibration values you're self by calling:
reefnet_sensusultra_parser_set_calibration(dc_parser_t *abstract, double atmospheric, double hydrostatic)
The defaults are: #define ATM 101325.0 #define GRAVITY 9.80665
parser->atmospheric = ATM; parser->hydrostatic = 1025.0 * GRAVITY;
And the depth returned is computed by:
#define BAR 100000.0
sample.depth = (depth * BAR / 1000.0 - parser->atmospheric) / parser->hydrostatic;
So, in my tired mind, something like: reefnet_sensusultra_parser_set_calibration(parser, ATM, 1000.0 * GRAVITY);
Should give you your depth for fresh water.
//Anton