4. Maintenance
4.1 ALARM LOG
The alarm log routine is used to view the list of the latest 64 alarms and 64 warnings and the
data when they occurred. The “clear alarm log” routine of the set-up menu should be used
to clear the list.
View procedure:
• Move the local selector to OFF and then simultaneously press OPEN and STOP. Select
the language according to the instructions (see “Entering the view mode”). When the
message displayed is “VIEW MODE OK?” press YES. Press NO to scroll the list of
available menus and press YES to select the Maintenance menu.
• Press YES to answer the prompt “Alarm log view?”.
• Press YES to scroll the list of alarms (“Alarms view?”).
• Press NO to move on to “Warnings view?” and then YES to scroll the list of warnings.
4.2 TORQUE PROFILE
The torque profile routine gives important information on the actuator working conditions in
comparison with a previously memorised reference profile. It can give a summarised but
significant indication of a change in the process conditions.
Details are given of the reference and latest torque expressed in % of the nominal torque.
At the end of a full stroke in opening or closing the ICON2000 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 strokes are also saved. The above data are updated at the end of every full valve
stroke and the previous ones are lost. Function “set torque reference”, in the SET-UP
MENU, Maintenance, (Chap I), allows to save the “torque profile” data in the “torque profile
reference” with date and time. The “torque profile reference” will not be updated until a new
“set torque reference” command is entered. The user can compare the last torque profile
relevant to the last valve stroke with the torque profile reference saved before.
The following definitions 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)
81
© Copyright by BIFFI Italia. All rights reserved.
“ICON2000”
instruction and operating manual
Section 618/2 chapt. L
Section 618/2
Opening torque
• breakout %
• breakout reference %
• peak run %
• peak run reference %
• ending %
• ending reference %
• date of the last stroke
• date of reference (same of closing)
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