Proceq SCHMIDT OS-120, Руководство по эксплуатации

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6 © 2013 Proceq SA
Repeat the procedure as many times as the standard you are working to requires. For example, EN
12504-2 requires a minimum of 9 rebound values for calculating the median.
The rebound value determined in this way can be converted to a compressive strength estimate
using the conversion curves (See chapter 4.4.) However, we recommend the creation of a user
defined curve specifically for the concrete under test. An EXCEL Macro is available with the product
documentation and also on the Proceq website to assist with this.
When the measurement is completed:
• Check the Schmidt OS-120PT on the anvil.
• Put the Schmidt OS-120PT into the neutral position. i.e. set the Schmidt OS-120PT on a horizon-
tal surface (e.g. leave it on the anvil after the control check), set the control knob (6) to position V,
depress the reset lever (2) to bring the hammer to position (B) and lock it in place by pushing the
lever (2) upwards. The OS-120PT may now be stored in the case.
4.4 Conversion curves for Schmidt OS-120PT
The typical measuring range, respectively the compressive strength range of the concrete under
test lies between 1 N/mm
2 (145 psi) and 5 N/mm 2 (725 psi). Typical curves are presented for this
range.
0.00
1.00
2.00
3.00
4.00
5.00
6.00
0 5 10 15 20 25 30 35 40 45 50
OS-120 PT Conversion Curve Cube 150/150/150
Horizontal impct direction N/mm
2
y = 1.05 * (0.0015x
2
+ 0.0615x - 0.3585)
Vertical impact direction N/mm 2 y = 1.05 * (0.0009x 2 + 0.0808x - 0.5081))
fc Cube 150/150/150
fc [
N/mm 2 ]
R