Elcometer 138 - Calculating Surface Density of Salts (ISO 8502)

3 : 8502-6 / 8502-9 (continued)TEST PROCEDURE ISO ISO
e 2
Based on an area of 12.5cm and a volume of 3ml.
e
Surface Density of Salts: Factors
ISO Salt Mix
IMO PSPC equivalent NaCI
Reading
2
mg/m
µg/cm
2
2
mg/m
µg/cm
2
µS/cm
x1.2
x0.12
x1.1
x0.11
The Elcometer 138 Bresle Salt Meter measures the conductivity of the sample but displays the surface
density of salts. The measured conductivity is converted to surface density of salts using the ISO Salt
Mix or IMO PSPC equivalent NaCI conversion factors shown in the table below, dependent on the
measurement mode selected.
Multiply the reading displayed by one of the ISO Salt Mix or IMO PSPC equivalent NaCI conversion
factors shown in the table below.
3.4 CALCULATING THE SURFACE DENSITY OF SALTS
USING THE ELCOMETER 138 BRESLE SALT METER
USING THE ELCOMETER 138 CONDUCTIVITY METER
Note: ISO 8502-9 allows for the measurement of the pure water before testing and then the subtraction of that value from that
obtained in section 3.2 step 8.
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