Before Commissioning; Introduction; Measuring Principle - sauter HMO Instruction Manual

1 Before commissioning

Before putting the device into operation, check the delivery for any transport damage
to the packaging, the plastic case and the device itself. Should this be the case,
SAUTER must be contacted immediately.

2 Introduction

2.1 Measuring principle

The measuring principle for the measurements carried out with this dynamic impact
hardness tester is physically quite uncomplicated. An impact body with a hard metal
tip is hurled against the surface of the test object by the spring force. When the impact
body hits the surface, it can be damaged, which ultimately leads to a loss of kinetic
energy.
This energy loss is calculated on the basis of velocity measurements, at a certain point
in time when the impactor is at a certain distance from the surface, both in the rebound
and impact phases.
The fixed magnet in the impact body generates an induction voltage in the simple wire
coil of the impact tester. The voltage of the signal is proportional to the speed of the
impact body. The signal is processed by the electronics so that the hardness value can
be read on the display and then stored.
English
Impact phase
Rebound phase
Time
HMO-BA-e-2020
German
Impact phase
Rebound phase
Time
3