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Training objectives: Item to be check before calibrating control valve with SVI-II positioner; How to perform auto calibration for control valve with SVI-II positioner; Check valve performance after calibration. Estimated task duration: 3 h. Prepare all technical documents for the work
WORK STEPS Task code CV_001 Task title Control valve SVI-II positioner auto calibration Equipment Control valve Training objectives: − Item to be check before calibrating control valve with SVI-II positioner; − How to perform auto calibration for control valve with SVI-II positioner; − Check valve performance after calibration Estimated task duration: h Prepare all technical documents for the work Step Description / purpose Result of check Prepare all technical document for the work, including: - Valve datasheet, valve calculation sheet, loop drawing; - P&ID, plot plan, instrument layout drawing -1- Note WORK STEPS Step Description / purpose Result of check Note Result of check Note Note: Document shall be the as-built version or latest revision Prepare material, spare part: - Positioner (if required) - Wire, wire plugs Prepare all tools required for this job, including: - Multi-meter, screw-drivers, allen key - Hart communicator, mA source Apply PTW in accordance with PTW procedure Inform and confirm with the operator to start maintenance work Start maintenance steps Step Description / purpose Start maintenance steps: 6.1 Request field operator to isolate control valve and put bypass valve in -2- WORK STEPS Step Description / purpose Result of check service (if needed) 6.2 Confirm that control valve is isolated completely 6.3 Confirm air supply pressure is same as name plate on the valve 6.4 Check and fix any air leaking in air tubing line 6.5 Confirm feedback linkage is connected properly 6.6 Supply 12mA power to postioner by either using 4-20 mA external power source or put output signal 50% from DCS Connect Hart communicator to positioned and go online 6.7 From Hart menu, proceed calibration step as follow: 6.8 Select Hart Application Select Device Set up 1HART APPLICATION 2FOUNDATION FIELD BUS SETTINGS LISTEN FOR PC SCRATCH PAD Online (SVI II AP) Mode Normal Input Signal 12.1 mA Valve position 50% Manual set point 0.0% Read Pressure Device Set up Status / Diagnostics -3- Note WORK STEPS Step Description / purpose DEVICE SET UP Select Change Mode Mode Normal Change Mode Set up wizard Manual set up Configuration Calibration Commissioning S Set mode Target Select Set Up Normal Manual Set up Mode Manual Select Calibration Menu Change Mode Set up wizard Manual set up Configuration Calibration Commissioning S Mode Manual Select Valve Travel Change Mode Valve Travel Manual Position… Valve Tuning Data Sensors Reset Cal Factor… Mode Manual Select Find Stops Change Mode Find Stops -It take about 20~30seconds Open Stop Adjus… Manual Stops Auto Tune Manual Tuning Select Open Stop Mode Manual Change Mode Adjustment (If full open is Find Stops Result of check -4- Note WORK STEPS Step Description / purpose Open Stop Adjus… more than 100% then put new Manual Stops Auto Tune number as per calculation) 7Manual Tuning - Example calculation A: Max travel of stem 70mm B: Scale plate 50mm New open adjustment should be (50/70) X 100 = 71.48% Mode Manual Select Auto Tune Change Mode Stops -Enter the Aggressiveness 34 Find Open Stop Adjus… Manual Stops Value Auto Tune Manual Tuning which is generally “0” - Enter Supply Pressure 10 Waiting for auto calibration proceeding automatically The calibration will be completed when message “calibration success” appear on HART screen (It takes about 3~6minutes Result of check -5- Note WORK STEPS Step Description / purpose 6.9 If the calibration fails, investigate and fix the root cause then try to calibrate again Put back the valve into “normal” mode Escape and disconnect HART communicator Put back the cover of positioner 6.10 Result of check Note Result of check Note Check & verification Step Description / purpose Inform and confirm with operator about checking and testing plan Do visual integrity check, stroke test and record result on check sheet Report to DM recorded result of check/test for review and confirm 10 If the result of check/test is acceptable, DM confirms to proceed handover to operation If result is not acceptable then re-work 11 Do housekeeping 12 Do handover equipment to GFM Close WO & PTW 13 Return all material/spare part to Ware house DM/GL acceptance: GFM sign: -6- WORK STEPS 14 Input actual WO data to CMMS E.O.D -7- ... field operator to isolate control valve and put bypass valve in -2- WORK STEPS Step Description / purpose Result of check service (if needed) 6.2 Confirm that control valve is isolated completely... Select Auto Tune Change Mode Stops -Enter the Aggressiveness 34 Find Open Stop Adjus… Manual Stops Value Auto Tune Manual Tuning which is generally “0” - Enter Supply Pressure 10 Waiting for auto calibration. .. set up Configuration Calibration Commissioning S Mode Manual Select Valve Travel Change Mode Valve Travel Manual Position… Valve Tuning Data Sensors Reset Cal Factor… Mode Manual Select Find