First, the ACI states that the sample should be taken between 15% and 85% of the discharge of the total load. The ASTM standard states "In any case do not obtain samples from the very first or last portions of the batch discharge."
I have a Swiss Hammer (and the Anvil, too), but It's not calibrated. Actually, it reads 80.23 when the right reading should be 84.
How do I do the correction to accurate reanding?
I have a Rebound Hammer (Swiss Hammer) and It's not calibrated. In the verification in Anvil, it should read 84, and it read 80.23 (average).
How do I do the correction to accurate reading?