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PERI InSite Construction -
Data Acquisition System
Instructions for Installation and Use - Technical Cabinet with Main Unit and Nodes – Preliminary Draft –
During normal use the Node battery will last between one and six months between charging.
However, if the Nodes are configured as repeaters and / or during high data load significantly
shorter battery life can be expected.
Refer to Illustrations Page 2 for visual illustrations.
3.6.3.1 Ambient Climate Node (N-TRF) to monitor the ambient climate or concrete
pressure
The Node type N-TRF is used to monitor the ambient climate and features a temperature and
humidity sensor. The ambient climate sensor is replaceable and available as a spare part.
A typical use case for the N-TRF node is to monitor the indoor climate inside a building being
erected or the outdoor climate surrounding a newly cast concrete construction.
The Node type N-TRF can be used in combination with the climate or the pressure sensor.
A typical use case for the pressure sensor is the monitoring of concrete pressure acting on the
formwork.
3.6.3.2 Temperature Node (N-TE) to monitor the temperature using a thermocouple
The Node type N-TE features two input channels for thermocouples type T.
A typical use case for the N-TE node is to monitor the temperature in newly poured concrete
in order to calculate the maturity age and, when the actual concretes temperature sensitivity
is known prognosticate the compressive strength. The thermocouples are typically fastened to
the rebar before the pour begins. Another typical use case is to monitor the temperature during
winter casting to ensure the young concrete is not subjected to freezing in a too early age.
It is also possible to monitor the temperature in cooling or heating pipes so that the temperature
difference between the inlet and outlet can be calculated.