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Mixing the Wet Bath Solution (optional)
Certified calibration solution (500 ml) is available from PAS Systems
International but making your own calibration solution by diluting a stronger
stock solution with distilled water is a simple process using the following
steps.
Stock Solution
To mix your (water/ethanol) stock solution, use a 100 ml
graduated cylinder for your mixing.
[1]
Pour 77 ml of 100 proof vodka into the 100 ml graduated cylinder
[2]
Pour the 77 ml of vodka into a 500 ml volumetric flask and fill the
flask up with distilled water.
This completes your mixture of stock solution.
You may keep your stock solution in a refrigerator for mixing calibration
solution as necessary. We do not recommend keeping stock solution for
longer than 45 days.
0.005% Ethanol Calibration Solution
[1]
Using a 0.5 ml volumetric pipette, draw in 0.5 ml of the premixed
Stock solution into a 500 ml volumetric flask
[2]
Fill the 500 ml volumetric flask up with distilled water.
This result gives you 0.005% calibration solution for use in the wet bath
simulator. For accuracy, if you have access to a quality evidential unit, run
your calibration fluid in the evidential unit to verify.
