HYDAC HMG 3000 - Manual (Page 22)

HMG 3000 Page 22
Edition 11/2007 - V02 R01-S02 Stock no.: 669712
In order to measure the flow rate using a
differential pressure measurement at a flow
rate orifice, select the item Orifice
measurement Q=f(dP)
. Then select the
number of decimal places and the unit (of
measurement).
A flow rate orifice is supplied with information
showing the correlation between pressure
differential and flow rate. For example, on a
HYDAC EVS 1000 it says: calibration factor
4.87 bar at 350 l/min. Enter these values
under the flow rate and pressure.
Here again the menu Organise curves appears, (for a function description and handling,
see Pressure differential dP above). Curve recording can be carried out exactly as described
above.
If you are using a HYDAC EVS 1000 flow rate measurement orifice, you can also use this to
record curves. On the EVS 1000 there are 2 pressure ports before the orifice (ports 1 and 2)
and one after (port 3).
To make a recording, connect the pressure transmitter from channel A to port 1, and the one
from channel B to port 2. To start measurement you need only then to change the pressure
transmitter from port 2 to port 3.