Endress+Hauser Solitrend MMP20, Руководство по эксплуатации

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Solitrend MMP20 (Option D) SWZ probe
Hauser 29
2. At the edge of the bucket, vertically insert the probe head with the plug-in blade
(plastic) fully into the concrete.
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The plug-in blade ensures that the larger gravel pieces do not "drift away" from
the probe head towards the side during the measurement, which can cause
inaccuracies.
3. Slowly push the tip of the probe - with the black ceramic surface at the front - in a
diagonal direction towards the opposite side of the bottom of the bucket. The handle
should rest on the edge of the bucket afterwards.
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This ensures that a representative concrete mix is present around the surface of
the probe.
4. Repeat this procedure several times, inserting the probe at a different point each time
so that it is offset from the previous point.
 Delete any individual measurements that are far from the displayed average
value
Kiln-dried sampling and kiln-dry testing of concrete with a flow class of F5 and F6 can
also deliver inaccurate results. If the concrete for the kiln drying process is taken from
the surface of the bucket or the base of the bucket, there can be a difference of up to
40 l in the water content in the case of concretes that tend to bleed!
After 4-5 measurements:
• If the standard deviation after 4-5 measurements is not acceptable (i.e. >0.5) or if the
measured values fluctuate too much, additional individual measurements must be taken.
• Before taking the measurements, mix the fresh concrete in the bucket again with
professional mixing tools. Do not mix the concrete for too long as water can escape from
the concrete.
• Afterwards, additional measurements can be taken.
Non-ideal concrete formulations are more prone to measured value variations. In the
case of concrete that does not meet the specifications of DIN EN 206-1 and
DIN 1045-2 (concrete that tends to bleed segregates), the measured value can
fluctuate. Incorrectly mixed concretes are difficult to measure with the SWZ probe
(but also with the kiln-drying test)!