Proceq SCHMIDT OS-120, Руководство по эксплуатации

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4. Measuring and evaluation with the Schmidt OS-120PT
The OS-120PT is primarily used to measure the early compressive strength of concrete non-
destructively. Measurements can also be made on lightweight concrete, plasterboard and similar
products.
4.1 Functional check
A test anvil is necessary for the functional check of the rebound hammer (see chapter 8.2).
Checking the Schmidt OS-120PT on the test anvil
The functional check should ideally be performed before and after each usage of the hammer. As a
minimum it should be carried out after 1’000 impacts or once every three months.
• Place the test anvil on a hard, smooth surface (e.g. stone floor).
• Clean the contact surfaces of the anvil and the hammer head.
• Carry out a few impacts on the anvil.
• Perform 10 test impacts on the test anvil.
NOTE! The mean of the rebound values must lie within the tolerance given on the anvil.
If this is not the case, e.g following an impact, the hammer mass is not held at the maxi-
mum rebound position, then the brake strip must be cleaned.
• Clean the brake strip on the under side of the semi-circular housing (1) using a clean cloth soaked
in Acetone or a similar product.