Installation Procedures Flashcards

After installing a new temperature transmitter in a HART loop, what must the technician configure first using a HART communicator before the transmitter will provide correct readings?

Answer: Configure the sensor type, range (LRV/URV), and engineering units to match the application

A HART transmitter shipped in factory default state must be configured with the correct sensor type, lower and upper range values, and units before it will provide application-accurate readings.

When installing a turbine flow meter, what practice is essential to prevent bearing damage during initial start-up?

Answer: Bring the process fluid up to flow slowly to allow the rotor to accelerate gradually rather than spinning up instantaneously

Rapid flow introduction can cause the rotor to over-speed momentarily, exceeding bearing load ratings and damaging the precision bearings.

A technician installs a pressure transmitter with a capillary-fill remote seal system. What phenomenon must be accounted for when the ambient temperature changes significantly?

Answer: Thermal expansion or contraction of the fill fluid changes the zero of the transmitter, requiring temperature compensation

Fill fluid volume changes with temperature, generating a pressure shift at the transmitter that appears as a zero error unless the system is designed to compensate for it.

What is the purpose of a calibration 'as-found / as-left' record when commissioning an instrument after installation?

Answer: To record the instrument's error before and after adjustment, providing traceability and evidence of measurement quality

As-found data documents the initial calibration state, and as-left data confirms the final adjusted state; together they provide a traceable calibration record required by quality management systems.

When mounting a vibrating fork (tuning fork) level switch in a vessel, which installation angle is generally NOT recommended by manufacturers?

Answer: Mounting from the bottom of the vessel looking up

Bottom-up mounting is generally not recommended because buildup of solids or heavy liquids on the forks can cause false actuation and the fork may be difficult to drain.

During functional testing of a newly installed safety instrumented system (SIS) pressure switch, what activity must be performed to satisfy IEC 61511 commissioning requirements?

Answer: Proof testing the switch end-to-end, verifying the final element (valve or trip) actuates at the setpoint and returns the SIF to safe state

IEC 61511 requires a complete proof test demonstrating that the safety instrumented function (SIF) responds correctly from sensor through logic solver to final element at the design setpoint.

A technician is installing a pH electrode in an inline flow-through assembly. What installation parameter most directly affects the measurement response time?

Answer: The flow velocity past the electrode sensing tip, which affects the rate of ion exchange at the glass membrane

Adequate flow velocity across the pH glass membrane ensures fresh sample constantly contacts the electrode, minimizing response lag caused by boundary layer stagnation.