Elcometer 138 User Manual page 9

4 TEST PROCEDURE US NAVY PPI
4 Insert the syringe into the patch through the spongy foam perimeter and inject 1.5ml of pure water
into the patch. Do not remove the syringe.
5 With the syringe still in the patch, reposition the needle and evacuate any air in the patch.
6 Once the air has been removed, inject the remaining 1.5ml of pure water.
7 Remove the syringe from the patch.
8 Rub the surface of the patch gently for 10 to 15 seconds to allow the water to dissolve surface
contaminants.
9 Insert the syringe into the patch through the spongy foam perimeter and extract the solution from the
patch.
10 Analyse the solution using the Elcometer 138 Meter, see Section
sample directly into the sensor cell. Rinse the sensor cell several times with the solution to be
measured before taking the reading.
See Appendix A on page en-15 for further instructions on using the Elcometer 138 Meters.
4
www.elcometer.com
: 63101-000 (continued)
4. 4 on page en- . Inject the 9
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