Manually Calibrate Salinity

Dadof2boys · Post by **Dadof2boys** » Mon Nov 23, 2015 3:52 pm

Here's my situation... I have calibrated my salinity probe with 35 ppt refractive index standard solution and when in the solution the probe is reading 35.0. When I move the probe to my RODI water it reads 6.0 and I know that is really at 0. When I move the probe to my sump the probe then reads anywhere from 34-35.6. I know that my water is really at a 1.025-1.026.

Without just saying take 10 points off the probes value is there a way to force the adjustment?

lnevo · Post by **lnevo** » Mon Nov 23, 2015 4:59 pm

6 is the lowest the probe reads. It's normal. It sounds like you're probe is reading perfectly for 1.025-1.026.

Dadof2boys · Post by **Dadof2boys** » Mon Nov 23, 2015 6:37 pm

So how do you know what your salinity really is then? Do you just mentally subtract 10 points?

rimai · Post by **rimai** » Mon Nov 23, 2015 8:00 pm

Do you keep your tank at 25ppt?
Salinity measurements are in ppt and not specific gravity.

lnevo · Post by **lnevo** » Mon Nov 23, 2015 8:22 pm

35ppt is 1.026

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