EB 8389-1S EN
31
Valve signature
4.3
Course of supply pressure
During control-loop operation, five values of
the supply pressure are recorded and saved
in a circular buffer. A new supply pressure is
recorded and saved in the circular buffer
when it deviates from the last value plotted in
the graph by the amount entered in 'Record
-
ing threshold'.
Data are recorded in the background re-
gardless of the operating mode selected. Da-
ta logging does not need to be activated. To
monitor the limits ('Lower limit' and 'Upper
limit'), the corresponding limit must be acti
-
vated first. The limits are automatically deter
-
mined while the valve signature is being
plotted. Alternatively, user-defined limits can
be entered.
Defining parameters
1.
Define 'Recording threshold'.
2. Enter limits for monitoring. See
u
3.
Select classification for status messages.
See
u
1.
Diagnostics > Monitoring/tests > Valve
signature > Course of supply pressure
−
Recording threshold:
0.10 to 14.00 bar, [0.50 bar]
2.
Device settings > Alarm settings
−
Activate lower limit: [Yes], No
−
Lower limit: [0.0] to 7.0 bar
−
Activate upper limit: Yes, [No]
−
Upper limit: [0.0] to 7.0 bar
Fig. 4:
Diagnostics > Monitoring/tests > Valve signature >
Course of supply pressure
