Accessories / Spare Parts; Technical Data; Appendix; Derivation Of The Proceq Standard Conversion Curves - Proceq DIGI-SCHMIDT 2000 ND Mode D'emploi

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7 .2

Accessories / Spare Parts

Designation
Protection sleeve for display unit
Transfer cable 9/9-position
Printer cable 9/9+25-position for printer
with serial port
Test hammer cable
Grindstone
Carrying case
Euro Anvil
7 .3

Technical Data

7 .3 .1
Display Unit
- Measuring range from 10 to 70 N/mm
strength of the concrete
- Non-volatile memory for max. 500 measurement
series of 10 measurements each
- Graphics LC display, 128 x 128 pixels
- Interface RS232
- Power supply with 6 batteries, 1.5 V, LR6 design for an
operating time of approx. 60 hours
- Permissible ambient conditions of -10 °C to +60 °C
7 .3 .2
Concrete Test Hammer
Impact energy:
Measuring range
(Compressive strength)
© 2017 Proceq SA
Article no .
330 00 470
330 00 456
330 00 460
380 02 510
310 99 037
340 00 281
310 09 000
2
compressive
Model ND Model LD
2.207 Nm
0.735 Nm
10 to 70 N/mm²
8

Appendix

8 .1
Derivation of the PROCEQ Standard
Conversion Curves
The conversion curves Fig. 8.1 and Fig. 8.2 for the con-
crete test hammer are based on measurements taken on
many sample cubes.
The rebound values R of the sample cubes were
measured using the concrete test hammer. The com-
pressive strength was then determined with the pressure
testing machine. In each test, at least 10 test hammer
impacts were performed on one side of the sample cube
which was lightly clamped in the press.
Material of the sample cubes:
All cubes were made from concrete consisting of good
quality fine gravel (maximum particle size Ø 32 mm) and
Portland cement.
Empirical values:
The conversion curve is practically independent of the:
- Cement content of the concrete
- Particle gradation
- Diameter of the largest particle in the fine gravel mix-
ture, providing the diameter of the maximum particle is
< 32 mm
- Water/cement ratio
Appendix
21

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