Torque Curve - Emerson Bettis XTE3000 Installation, Operation And Maintenance Manual

Section 10: View Routines
October 2019
View Procedure
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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 XTE3000 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 XTE3000 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
Time
Temperature
Term temp
Motor temp
Main voltage
Closing / Opening time
Torque 0
Torque 100
80
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 Profile".
Press YES to scroll through the list of values.
Installation, Operation and Maintenance Manual
Date of the valve stroke
Time of the valve stroke
Temperature (°C) inside the electronics compartment dur-
ing the valve stroke
Temperature (°C) inside the terminal board compartment
during the valve stroke
Temperature of the electrical motor (°C) during the valve
stroke
Main voltage supply (V) during the valve stroke
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 value in % of the nominal torque / thrust stated
in the Name Plate menu. In opening "Torque 100" cor-
responds to position 100% and in closing "Torque 100"
corresponds to position 0%
MAN-02-04-97-0713-EN Rev. 1
View Routines