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Handling the Lancehead-Shaped Probe
Measuring Procedure for Concretes with Flow Diameters F2, F3, F4
After inserting, carry out an individual
measurement in this position. After this,
pull the probe out of the bucket. When
pulling out the probe, the fresh concrete
can separate at this point and fine parti-
cles can penetrate into the cavity.
Therefore, re-insert the probe at approx.
70° to 90° further along the edge of the
bucket. Compact the concrete by knock-
ing on the side (e.g. with the foot) so that
the concrete makes good contact with
the surface of the probe. Carry out an in-
dividual measurement again.
Repeat the procedure 4 to 5 times, insert-
ing the probe at an angle of 70° to 90°
from the edge of the bucket.
The dark ceramic surface of the
lancehead- shaped probe must be wiped
clean each time, removing any concrete
residue prior to the measuring procedure
to ensure that concrete residue on the
lancehead-shaped probe will not falsify
the measurement.
Concretes with flow diameters F2, F3 and
F4 do not easily separate. Therefore, this
measuring procedure ensures the best
possible measurement results due to the
lateral insertion and compaction by knock-
ing on the side of the bucket.
For the relatively stiff F2 concrete, it may
be necessary to compact the concrete in
the bucket with the probe on a vibrating
table prior to taking a measurement.
SONO WZ
Translation of the Original Instructions for Use
Fig. 13
Fig. 14
37
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