Tecfluid DP Series - Manual (Page 4)

4
1 WORKING PRINCIPLE
A target disk flowmeter is based on the indirect measurement of the force which is
exerted on a disk suspended in the trajectory where a fluid flows at a certain speed.
The disk is held by a shaft which is perpendicular to the fluid direction, so that the force
applied by it affects the shaft rotation. At the same time, a spring attached to the shaft is
opposed to its turn. When the force applied on the spring is equal to the force exerted by
the fluid, an equilibrium point of the turn angle of the disk, which is equivalent to a flow
rate, is achieved.
The flow reading is made by means of magnetic coupling with the housing indication
system, thus avoiding fluid leakage to it.
2 RECEPTION
The target flowmeters Series DP are supplied already calibrated, ready to be mounted
and put into operation.
The meters are conveniently packaged for transportation together with their instruction
manual for installation and operation. The target disk securing elements used for transport
should be removed before mounting
2.1 Unpacking
Unpack the instrument carefully, removing any remains of the packing from the inside of
the sensor. The target disk must be checked manually to see if the spring shows an even
resistance and that the indicator needle moves freely over the graduated scale and
returns to 0.
2.2 Storage temperatures
-20ºC ... +60ºC
3 HANDLING
It should always be done with care and without knocks.