2.1 - Planning the Installation
10
M2079/3en Installation Instructions
M2079/3en
© BTG 2016
2.1.2
Process Site Selection
Install the transmitter in a part of the piping where no disturbances, for exam-
ple air or vibrations, are expected. Make sure that the straight pipings before
and after the transmitter are sufficiently long, see fig 4.
Piping for extraction of partial or return flow should always be inserted in the
main pipe after the transmitter, see fig 4.
In those cases where the medium contains particles, always install the trans-
mitter after the filter.
NOTE!
When measuring on non-Newtonian media, do note that a pump, valve or pipe
elbow can cause a treatment of the medium. The treatment varies due to the
flow velocity. If the transmitter is installed too close to the pump, valve or pipe
elbow, it may seem as if the transmitter is dependent on flow velocity, when the
real case is that it measures on a medium that has a viscosity that has been
affected by the flow velocity, which in turn affects the shear rate.
If the medium is non-Newtonian we recommend the usage of a pump that
leaves variations as small as possible in the flow velocity.
2 x D
2xD
5 x D
5xD
Fig 4 Recommended
minimum calming
length
D = pipe diameter
Partial or return flow
