| The distance moved by the indentor from the datum is automatically converted to the IRHD value, which is displayed digitally on the H12 and H14 at the end of the test. |
| The two test methods use totally different indentor geometries, applied forces, test times and procedures. |
| Each has a spring-loaded indentor which, when applied to the specimen, gives a direct hardness reading. |
| This features larger indentor and a more strong spring compared to Model C, thereby making it more suitable for polystyrene foam. |
| The hardness measurements were conducted using a Zwick model 050 universal testing machine, a 5KN load cell, and a standard 203 mm diameter indentor foot. |
| A cylindrical sample is mounted in a holder and impacted by a free falling pendulum of specified length, mass and attached indentor geometry. |
