VVP10 HART
HART
®
VALVE POSITIONER
INSTALLATION, OPERATION, CONFIGURATION AND MAINTENANCE MANUAL
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29
User Table Configuration using Local Adjust
The user can configure the table points using the local adjustment (
Table Point
option) for five predefined points: 0%,
25%, 50%, 75%and 100%.
0% and 100% points are automatically associated with previously calibrated position extremes (see the following
section on "Calibration"). Therefore, the user can configure the desired points to 25%, 50% and 75%, completing the
five -point table.
To do this, the following procedure should be followed.
1. Access the Table Point option on local adjustment and insert the magnetic key into S;
2. After displaying the "25% Point" message on display, remove the adjustment screwdriver and position the valve
manually in the desired position (suggests small increments/decrements in the Setpoint current);
3. After the desired positioning of the valve, insert the magnetic screwdriver into Z until the message "25% OK" is
displayed;
4. Insert the magnetic screwdriver into S for configuring the next point;
5. Repeat items from 2 to 4 to configure points 50% and 75%;
6. After configuring all the three points, insert the magnetic screwdriver into S to finish the process.
WARNING
This procedure only configures the User Table points.
To activate the table operation, you must change the configuration of the Characterization Curve parameter
(
Characterization
) to Table.
CALIBRATION AND PID TUNING
This directory (
Specific/Calibration
) has procedures for calibrating the system positioning (automatic or manual), as
well as automatic tuning of the PID control.
Auto Travel Calibration
It performs the automatic adjustment procedure of the 0% and 100% position sensor references.
It also calculates the opening times (0% to 100%) and closing (100% to 0%) with maximum actuator performance
(according to the applied pressure). Figure 3.13 shows procedure steps.
Figure 3.13 – Diagram for position automatic calibration.
WARNING
During these procedures system will perform several opening and closing movements, it is recommended
that the process be prepared for this behavior.
