BIFFI ICON-040 - Torque Curve

December 2019
80
Installation, Operation and Maintenance Manual
VCIOM-08500-EN
Section 10: View Routines
View Routines
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 through the list of available menus and press YES to select the
"Maintenance" menu.
• Press NO to scroll through the list of routines and press YES to select "Torque
Prole".
• Press YES to scroll through the list of values.
10.4.3 Torque Curve
The torque curve routine gives important information on the actuator working conditions
in comparison with a previously memorized reference torque curve. It can be used to
perform a detailed analysis of a change in the process conditions.
During a full valve stroke in opening or closing, the ICON3000 measures the torque
values relevant to every 1% of position variation. At the end of the stroke the collected
101 values (one torque value every 1% of position change) are saved in the ICON3000
memory together with the time and date of strokes, main voltage, motor temperature,
temperature inside the electronics compartment, and temperature inside the terminal
board compartment. Up to 100 curves in opening and 100 curves in closing can be saved.
When a new curve becomes available, the oldest one is canceled and the new one is
memorized. The above data are updated at the end of every full valve stroke. Data relevant
to a partial stroke are disregarded. The function “set curve reference”, in the SET-UP MENU,
Maintenance, Section 7, allows the user to save the full set of data relevant to 1 of 100
“torque curves” in the “torque curve reference”. The “torque curve reference” will not be
updated until a new “set curve reference” command is entered.
The user can compare the last 100 torque curves in opening and closing in relation to the
last 200 valve strokes with the torque curve reference saved before.
Table 14 shows the list of saved data for each opening or closing curve:
Table 14.
Date Date of the valve stroke
Time Time of the valve stroke
Temperature Temperature (°C) inside the electronics compartment during the valve stroke
Term temp Temperature (°C) inside the
terminal board compartment during the valve stroke
Motor temp Temperature of the electrical motor (°C) during the valve stroke
Main voltage Main voltage supply (V) during the valve stroke
Closing / Opening time
Torque 0
Torque value in % of the nominal torque / thrust stated in the Name Plate
menu. In opening “Torque 0” corresponds to position 0% and in closing
“Torque 0” corresponds to position 100%
Torque 100
Torque value in % of the nominal torque / thrust stated in the Name Plate
menu. In opening “Torque 100” corresponds to position 100% and in closing
“Torque 100” corresponds to position 0%