4. Commissioning and operation
Pressure change (slope), rising
Calculates the pressure change in % / minute:
(P1 - P0) / t
EN
P0
=
Initial pressure
=
Pressure after measurement interval t
P1
t
=
Set measurement interval in minutes
Example: Pressure rises from 3 to 5 bar at a measurement interval of 5 minutes: (5 - 3) / 5 = 0.4 bar / minute
Calculated pressu-
re change
Alarm limit
Sensor measu-
red value
18
Alarm
Alarm
triggered
switched off
Measurement
interval
WIKA operating instructions pressure sensor, model PEW-1000
Time