Measuring salt contamination using the Bresle method in accordance with ISO 8502-6/ISO 8502-9
Remove protective backing and foam centre from the patch.
Apply the patch to surface and press firmly around perimeter to achieve a complete seal - ensuring that a minimum amount of air is trapped within the test compartment.
Fill the syringe with 3.0ml of pure water. Insert the syringe into the patch through its foam perimeter, at a 30° angle, so that it passes through the foam into the test compartment.
Inject the water into the test compartment. If necessary remove the remaining air within the compartment.
During an agreed period of time, without removing the needle - withdraw and re-inject the solution back into the patch, at least four times.
At the end of the period extract as much solution as possible.
Remove the syringe from the patch and measure the conductivity of the solution using a suitable Conductivity Meter such as the Elcometer 138.