Proceq SCHMIDT OS-120 - 5 Measuring and Evaluation with the Schmidt OS-120 PM; Functional Check; Preparations

8 © 2013 Proceq SA
0
100
200
300
400
500
600
700
0 5 10 15 20 25 30 35 40 45 50
OS-120 PT Conversion Curve Cylinder 150/300
Horizontal impact direction psi y = 0.8337 * 145.038 * (0.0015x
2
+ 0.0615x - 0.3585)
Vertical impact direction psi y = 0.8337 * 145.038 * (0.0009x
2
+ 0.0808x - 0.5081)
fc Cylinder 150/300
fc [psi]
R
A form factor must be used to correct the conversion estimate in cases where the compressive
strength is not to be used as either as standard cube compressive strength (150/150/150 cube) or
a standard cylinder compressive strength (150/300 cylinder). (See the corresponding information in
the document delivered with the instrument, or on the Proceq website.)
5. Measuring and evaluation with the Schmidt OS-120PM
The OS-120PM is used to test the mortar of joints in masonry constructions non-destructively. The
mortar can then be classified based on the rebound value. The classification is only valid for mea-
surements on vertical walls.
5.1 Functional check
The functional check of the Schmidt OS-120PM is carried out in the same way as for the Schmidt
OS-102PT (see chapter 4.1).
5.2 Preparations
• Identify a suitable location on the mortar joint. If necessary, remove any dirt or moss, etc.
• The hammer (3) must be fixed at position 75 on the scale (5) and the control knob (6) turned to
position V (for testing on vertical surfaces). See respective picturein chapter 4.2.