Installation
CAUTION! Malfunction due to bubbles!
Gas bubbles which are also formed by cavitation in the medium can cause a
malfunction of the sensor and must be prevented.
Observe the following instructions in order to achieve highest-possible measurement
accuracy and specified output signal:
Before installing the turbine flow monitor flush the pipe carefully. You avoid a blocking
of the turbine caused by particles from the pipe installation.
The installation position of the flow monitor is unreserved. If it is installed into vertical
pipes, the flow direction is preferably from below upward. You must avoid a free
outlet.
The arrow which is placed on the flow monitor (
) shows the only permitted flow
direction.
In order to achieve the best measurement accuracy, a straight tube in front of the flow
monitor must be retained, min 10 x DN. Behind the flow monitor, a straight outlet
tube of 5 x DN must be kept.
The internal diameter of the in- and outlet tubes must correspond with the internal
diameter of the flow monitor. Before and behind the stabilization tubes, the line may
be contracted or enlarged.
In practice these instructions often cannot be observed. Then the pulse rate and
the measurement accuracy can be affected.
The flow medium to be monitored should preferably contain as few solid particles as
possible.
Present particles must not exceed a diameter of 0.63 mm. If necessary, install a
screen filter!
The material of the devices is not suitable for monitoring oils. The strength of the used
plastic parts would be considerably reduced.
Attention:
The union nut of the sensor is sealed and must not be opened!
If this component is opened, the fixation of the turbine system loosens and it is
damaged.
Installation in piping:
Now you can install the flow sensor in the piping system which was prepared.
Note:
Only use a suitable sealant for sealing.
If the male thread is to be sealed, make sure that no fibrous sealants (hemp or Teflon
tape) get into the flow.
DR08-25 Instruction manual 09/2020
page 4