DRS
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DRS
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5. Operating Principle
The DRS flow meter operates on the turbine wheel principle. The liquid first flows
through a laminar flow element that eliminates turbulence and routes the flow
stream into the turbine wheel. The turbine wheel then starts to rotate. This rotary
motion is sensed non-contacting by magnets embedded in the turbine wheel and
converted to a frequency signal. The frequency is proportional to the flow
velocity. Various outputs, such as frequency divider,
analog
output or
compact electronics with LED display with limit contacts are available as
options. An integrated temperature sensor for simultaneous measuring of
flow rate and temperature is also available as an additional option. The
rotating vane is sapphire-supported: this ensures a high degree of linearity and
long service life.
6. Mechanical Connection
6.1. Operational conditions check-up:
•
Flow volume
•
max. operational pressure
•
max. operational temperature
Attention! Exceeding prescribed ranges may cause damage to ball-
bearings and considerable measurement errors may result.
6.2. Mounting
•
Installation can
be
in horizontal and
vertical
pipes
(
flow direction
from bottom
to top
)
. Flow in the direction of the arrow.
•
Pressure and tensile loading is to be avoided on the connection threads.
Inlet and outlet piping should be secured at least 50 mm away mechanically
from the connections.
•
Check the sealing of the connections
.
•
The use of flat sealings is to be preferred. The sealing surfaces are shown in
section 11 - “Dimensions“
