When to carry out a moisture test on Concrete?

For best and most accurate results, final tests should be carried out after the internal conditions of the building in which the slab is located have been at normal service temperature and humidity for at least 48 hours. All artificial heating or drying equipment should be turned off at least 96 hours before final readings are attempted, otherwise results may not accurately reflect the amount of moisture present or moisture movement in the slab during normal operating conditions. If being used for the final test while artificial heating or drying equipment is on, the readings should only be considered as an indicative guideline for monitoring purposes, and not as the final test. Prior to testing, the actual test area should be clean and free of foreign substances.