RESPONSIBILITIES AS A PRECOMMISSIONING INSTRUMENT TECHNICIAN
Processing general work permit (GWP), Organizing tool- box meeting with work crew. Analyzing hazard that is associated with job (JSA) and their control measures with work crew. ( WRP)
Interpretation of piping and instrument diagram
Visual inspection of field instrument to check if each instrument conforms to the instrument data sheets, check that instrument nameplates, tags with proper plant identification numbers, tubin and wire markers, etc., have been installed on all instrumentation components, Check that process connections such as orifice taps, level taps, pressure points, temperature points, sample points, etc., are properly tubed to each instrument. Verify that the installation conforms to the installation detail or drawing,
Check that instruments located in piping, such as flow elements, DP transmitters, control valves, shutdown valves, etc., are mounted in the correct flow direction
Check that valve manifolds are installed and function properly
Line checking of field instrument from instrument panel ( Distribution control system DCS, Safety instrumented system SIS, fire and Gas F&G ) to primary and secondary junction box and instrument to see if there are properly terminated
Energizing of field instrument from instrument panel ( Distribution control system DCS, safety instrumented system SIS, Fire & Gas system F&G ) and Log-out Tag-out ( LOTO ) of field instrument
Colour coding of field instrument
Performing Pre loop check and Final loop check on Fieldbus and Hart instrument ( Pressure transmitter, Temperature transmitter, Flow transmitter, Level transmitter, Resistance Temperature Detector, Thermocouple, Gas detector transmitter, Flame detector transmitter, pressure differential transmitter, guided wave transmitter , Pressure switch, Level switch, Temperature switch, Flow switch, Pneumatic, Solenoid and Motor operated control valve, Cathodic protection, Vibration switch ) to test and prove the correct functioning of the instrumentation system as a whole including, but not limited to, all field and panel devices and their signals, field and control room terminations, the Process Control System (PCS) including Human Machine Interface (HMI) displays, Fire and Gas (F&G) System, Safety Instrumented Systems (SIS) and annunciators.
Troubleshooting of intelligent field devices ( Transmitter, valve positioner, switches )
Performing Cause and effect on field instrument
Changing of instrument segment address and field instrument tag using 475 Hart communicator
Performing of instrument segment test to ascertain their signal level, voltage level, jitter and noise disturbance are within the specification limit with an adequate safety margin
Calibration of Fieldbus and Hart instrument using 475 Hart communicator, DP880 temperature simulator and DPI615pressure simulator to checked against a certified standard, also to verify its accuracy and to configure certain parameters, such as alarm and/or trip settings
Performing input opening test, output opening test ( IOP and OOP ) and plant resource manager test
Stroking of pneumatic control valve with positioner ( Fail close and Fail open, single and double acting valve ) and solenoid operated valve ( SOV ) fully open and fully close
Carrying leak test on impulse and air line, clearing of punch list items
Dressing, glanding and termination of field instrument ( Pressure transmitter, Temperature transmitter, Flow transmitter, Level transmitter, Resistance Temperature Detector, Thermocouple, Gas detector transmitter, Flame detector transmitter, pressure differential transmitter, Pressure switch, Level switch, Temperature switch, Pneumatic, Solenoid and Motor operated control valve, Analyzer transmitter)
Carrying out loop check on fire and instrument such as smoke detector public and general alarm system, manual core point, flame detector and gas detector in order to determine the various levels or percentage of gases (Hydrocarbon HC, Carbon Monoxide CO, Hydrogen Sulphide H2S, and Methane CH4 etc.).
Performing loop check on Analyzer transmitter in order to determine the various level or percentage of gases and liquid that can be analyzed during process.
Performing loop check on safety showers.
Reporting daily activities to the person in charge ( PIC )