BIFFI ICON-030 - Torque Profile

December 2019
79
Installation, Operation and Maintenance Manual
VCIOM-08500-EN
Section 10: View Routines
View Routines
10.4.2 Torque Prole
The torque prole routine gives important information on the actuator working
conditions in comparison with a previously memorized reference prole. The torque
prole can indicate a change in process conditions.
Reference details are retained and the latest torque is expressed as a % of the nominal torque.
At the end of a full stroke in opening or closing, the ICON3000 stores the 3 maximum
torque values in position intervals 0%-10%, 10%-90%, 90%-100% in opening, and the 3
maximum torque values in position intervals 100%-90%, 90%-10%, 10%-0% in closing.
Time and date of valve strokes are also saved. The above data are updated at the end of
every full valve stroke and the previous data are overwritten. The “set torque reference"
function in the SET-UP MENU, Maintenance, (Section 7), allows saving of the “torque
prole” data in the “torque prole reference” with a date and time. The “torque prole
reference” will not be updated until a new “set torque reference” command is entered.
The user can compare the last torque prole relevant to the last valve stroke with the
torque prole reference saved before.
The following denitions will be used:
• Breakout: maximum torque % in position interval 0-10% in opening or
100%-90% in closing = max. % of torque to unseat the valve.
• Peak running: maximum torque % in position interval 10-90% in opening or
90% - 10% in closing = max. % of torque when the valve runs from Breakout to
Ending (maximum mid-travel).
• Ending: maximum torque % in position interval 90-100% in opening or
10%-0% in closing = max. % of torque to seat the valve.
The following data may be viewed:
Closing torque
• Breakout %
• Breakout reference %
• Peak run %
• Peak run reference %
• Ending %
• Ending reference %
• Date of the last stroke
• Date of reference (same of opening)
Opening torque
• Breakout %
• Breakout reference %
• Peak run %
• Peak run reference %
• Ending %
• Ending reference %
• Date of the last stroke
• Date of reference (same of closing)