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© Copyright by BIFFI Italia. All rights reserved.
“ICON2000”
instruction and operating manual
Section 618/2 chapt. L
Section 618/2
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 NO to scroll the list of routines and press YES to select torque profile.
• Press YES to scroll the list of values
4.3 TORQUE CURVE
The torque curve routine gives important information on the actuator working conditions in
comparison with a previously memorised 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 ICON2000 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 ICON2000 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 is available the oldest one is cancelled and the new one is memorised. The
above data are updated at the end of every full valve stroke. Data relevant to a partial stroke
are discharged. Function “set curve reference”, in the SET-UP MENU, Maintenance, chap I,
allows to save the full set of data relevant to 1 off 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 relevant to the last 200 valve strokes with the torque curve reference
saved before.
Below is the list of saved data for each opening or closing curve:
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%.
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