IMKO TRIME-PICO 32, Руководство пользователя

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Manual TRIME_PICO64-32 Version 2_0 2017-05-30
Page 40
The following diagram illustrates curve progressions of pore-water with four different salinity con-
tents at different moisture contents for the PICO32.
Sand1 was mixed with 0,5dS/m pore water, sand2 mixed with water which had a conductivity of
5dS/m, sand3 with 10dS/m and sand4 with 20dS/m water. The PICO32 determines different EC
TRIME
conductivities in the different sands at one moisture level. The moisture range with the best resolu-
tion for the EC
TRIME
measurement lies between 10% and 30%, depending on the salt content.
How to determine the salt content
With both parameters, the moisture value (X-axis) and EC
TRIME
(Y-axis) it is possible to determine the
salt content in sand. With a moisture content of e.g. 17% and an EC
TRIME
of 4,6dS/m, the intersection
point lies on the blue curve which represents a salt content of 6,4g salt per liter water in the sand.
With 30% moisture content and an EC
TRIME
of 5,5dS/m the salt content would be 3,2g salt per liter
water in the sand.
The intersection point of „Moisture“ and „EC
TRIME
“ is representing the salinity curve EC
W
in the
sand-diagram.
This sand diagram shows four pore water curves. If intersection points lies between this four curves
(e.g. the yellow curve), the result of the salt content has to be interpolated.