What is a ‘dynamic’ proof test? This is when the hoist is not only loaded once to a proof load (usually between 100% and 120% of Rated Hoist Capacity) but chain travel during this test should result in at least a minimum of one full rotation of the chain sprocket. This is required to verify that the hoist brake is working properly with no apparent slippage or load creep and holding the load by stopping the motion of the hoist handle or hand chain. This requirement is published by the AWRF Recommended Guideline for Proof Test Procedures for Manual Lever- and Manual Overhead and Electric Hoists. Make sure your Test Certificate shows not only the LOAD but also DISPLACEMENT/TRAVEL during the test.