Test Procedure: Us Navy Ppi 63101-000 - Elcometer 138 User Manual

3 TEST PROCEDURE: ISO 8502-6 / ISO 8502-9 (continued)
7 At the end of the period, extract as much solution as possible and
remove the syringe from the patch .
8 Measure the conductivity of the solution using the Elcometer
138E Conductivity Meter, see Section 5.9 on page en-16. Inject
the sample directly into the sensor cell. Rinse the sensor cell
several times with the solution to be measured before taking the
reading.
3.3 AFTER TEST
1 Record the temperature of the solution.
2 Remove the patch from the surface and clean the surface. If
required, any adhesive residue from the patch left on the test
surface can be removed by wiping with a cloth moistened with a
suitable solvent. Ensure that the solvent will not damage the
surface before use.
3 Rinse all components of the test kit, other than the patch, in
fresh, pure water. The components can then be used again.
3.4 TO CALCULATE THE SURFACE DENSITY OF SALTS
Multiply the reading by one of the following factors:
Reading
µS/cm
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 above.

4 TEST PROCEDURE: US NAVY PPI 63101-000

4.1 BEFORE YOU START
1 Calibrate the conductivity meter, see Sections 5.6 and 5.7 on
pages en-10 and en-14.
2 As the test is extremely sensitive, clean latex or nitrile gloves
should be worn during the extraction of soluble salts to prevent
contamination of the surface.
c
During steps 6 and 7, it is essential that no solution is lost. If any solution is lost, the test shall be rejected.
d
Based on an area of 12.5cm and a volume of 3ml.
www.elcometer.com
Surface Density of Salts: Factors
ISO Salt Mix
2
mg/m
µg/cm
x1.2 x0.12
2
c
IMO PSPC equivalent NaCI
2 2
mg/m
x1.1
R
d
2
µg/cm
x0.11
en-4