6
UCI method is suited to make the evaluation of Vickers indents, and thus of the
complete test procedure, so much easier and quicker.
There are also two additional advantages:
-the measurement is made under load. (No impairment of the measurement due to
elastic resilience);
-the hardness measurement is based on the area of the indent and not on the length
of the indent diagonals.
The measurement is thus less affected by surface roughness; even gunmetal-
finished surfaces can be measured.
Concerning the UCI method, the measurement value is also dependent on the
Young’s modulus of the material.
6. Preparations for operation
6.1. Battery supply
The hardness tester is powered by batteries or accumulators. For this you need two
AA 1.5 V:
-dry cells (AlMn) or rechargeable (Nickel-Cadmium or Nickel-Metalhydrid).
Manufacturer recommended to use the Nickel-Metallhydrid batteries, because the
operation time is increased by 60%.
Using of batteries and accumulators.
You can insert batteries (AlMn) or accumulators (NiCd, NiMH).
- Open the battery compartment.
- Insert the batteries, observing the correct polarity.
- Close the battery compartment.
Used or defective batteries are special refuse and must be disposed of according to
the governing laws!
6.2. Connection of probes
Socket for the probe is at the top of the information processing unit. Connect the
probe cable to the socket in accordance with the marks on the connector.
