Danger!
Always hold the concrete test hammer in
both hands, perpendicular to the test
surface, before you trigger the impact!
Each test surface should be tested with at least
8 to 10 impacts.
The individual impact points must be spaced at
least 20 mm apart.
Fig 2.3
Performing the test (illustration shows model NR)
• If you are using models N and L, press the push-button
(6) to lock the impact plunger (1) after every impact.
Then read off and note down the rebound value R indi-
cated by the pointer (4) on the scale (19).
• If you are using models NR and LR, the rebound value
R is automatically printed on the recording paper. It is
only necessary to lock the impact plunger (1) using the
push button (6) after the last impact.
© 2017 Proceq SA
• Position the concrete test
hammer perpendicular to
and against the test surface.
Push the concrete test ham-
mer against the test surface
at moderate speed until the
impact is triggered.
1
Fig. 2.4
Reading the test result from the scale (19) on
models N and L
2 .3
Outputting and Evaluating Data
2 .3 .1
Output
Models N and L
After every impact, the rebound value R is displayed
by the pointer (4) on the scale (19) of the device.
Models NR and LR
The rebound value R is automatically registered on the
recording paper.
It is possible to record about 4000 test impacts on each
roll.
2 .3 .2
Evaluation
Take the average of the 8 - 10 rebound values R which
you have measured.
Do not include values which are too high or
too low (the lowest and highest values) in
your calculation of the average value.
Measurement
4
19
6
5