PCE Instruments PCE-VM 40A, Руководство пользователя

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Manual
8
For sustained vibration, the following reference values apply:
Reference values for vibration velocity v
i
for analysing the effects of sustained vibration
Building type Upper ceiling level, all frequencies
Direction X /Y (horizontal) Z (vertical)
Reinforced or framed structures
industrial and heavy commercial
buildings 10 mm/s 10 mm/s
Unreinforced or light framed
structures, residential or light
commercial type buildings 5 mm/s 10 mm/s
Sensitive buildings, listed
buildings e. g. historical
monuments 2.5 mm/s -
Vertical sustained vibrations with a vibration velocity below 10 mm/s normally do not cause damage to
ceilings in houses. For sensitive buildings, there are no reference values available.
For sustained vibration on pipelines, the reference values for short-time vibration, reduced by 50 %, can
be applied.
The following advice is given in DIN 4150-3 for the placement of the sensor:
- For foundation vibrations, the transducer should be placed on the lowest floor at the foundation of
the outer wall or on the outer wall.
- In the upper ceiling level the sensor should be placed inside or very close to the outer wall.
- For buildings without a basement, the measurement location must not be higher than 0.5 m
above the ground level.
- The measurement location should predominantly be on the side of the building facing the
excitation.
- One of the lateral measuring directions (X / Y) should be parallel to one outside edge of the
building.
- Buildings with larger ground areas should be measured at several points.
- In addition to measuring at the foundation and the upper ceiling, if required, measurements can
be carried vertically on the ceilings, where the strongest vibration can be expected (mostly
central).
- When measuring pipelines, where possible, the sensor should be placed on the pipeline itself.