HYDAC HMG 3010 - Manual (Page 22)

HMG 3010 Page 22
Edition 11/2011 - V04 R01 Part No.: 669855
Example:
For both 100 bar pressure transmitters there is a differential measurement range of
-10 – +10 bar, in other words a measurement margin of 20 bar. The accuracy of ≤ ± 0.1%
refers to this measurement margin. The pressure differential can therefore be measured with
an accuracy of ≤ ± 0.02 bar.
To measure a pressure difference, select
the item Pressure differential dP. Then you
find a menu point Organise curves. Here
you can plot up to 3 curves for 3 pressure
transmitter pairs. If a curve for a pressure
transmitter combination already exists, you
can quit the menu again by selecting Back
or the Esc key. The HMG 3010 automatically
selects the appropriate curve. If you quit the
menu and the HMG 3010 detects that no
curve exists for this combination, you will get
the message shown on the right. You can
now, with less accuracy, measure the differ-
ential or you call the menu item again to re-
cord a new curve under Organise curves.
Once Organise curves is selected, a screen
appears which allows you to record a new
curve, or you see information on curves
which already exist. At this point you can
also delete existing curves if they are no
longer required. If curve 1 already exists,
navigate to this field and press the OK key.
You can now, for example, select Character-
istic curve 2, Not available and then record
a curve. To record the curve you must con-
nect both pressure transmitters to the
HMG 3010 at channel A and channel B.