For the CM-method one must take a slab of concrete (at least 100g) and break it up into small as quick as possible using a hammer.
Put exact 20g of the probe into a special bottle, and add 4 special steel balls and a carbide cartridge. Then close the bottle and shake it for approx 10 minutes. Depending on the moisture content pressure will start to build. Measure this pressure with the pressure meter and read the correspobding moisture from the table.
There are a lot of error sources, therfore the moisture result is not as accurate as the drying method!
In our opinion the valid comparing measurements should be done with the most accurate method and not with the CM-Method!