Orifice plates need condensate pots and DP transmitters; vortex meters eliminate impulse lines but have a low-flow cutoff. This article compares both technologies for steam service and presents the commissioning procedure for Emerson Rosemount 8800DF and Honeywell SmartLine STF, including density compensation, HART configuration, and five fault patterns with diagnostic steps.
Clamp-on ultrasonic flow meters offer non-invasive measurement without process shutdown, but incorrect pipe data entry and poor transducer placement produce errors above 5%. This guide covers commissioning for GE PT878 and Yokogawa ADMAG clamp-on systems, including pipe geometry input, transducer spacing, coupling compound selection, signal quality verification, and six-step fault isolation.
Variable frequency drives generate switching harmonics that couple into nearby 4-20mA instrument loops and corrupt analog readings. This article identifies the four primary coupling mechanisms, presents a six-step field diagnosis procedure, and details the shielding, filtering, and grounding techniques that reduce loop noise below the 0.05 mA threshold required for reliable SIS and DCS operation in ABB ACS880 and Schneider Altivar 630 installations.
When 18 temperature transmitter tags simultaneously dropped to 0°C, what began as a localized instrumentation fault cascaded into a full plant shutdown. This article reconstructs the incident, analyzes the failure chain across two Phoenix Contact temperature MUX units, and identifies the corrective actions and preventive measures that prevent recurrence in Honeywell Safety Manager installations.
Diaphragm seal mounting techniques directly affect measurement accuracy, response time, and long-term reliability in industrial pressure systems. This guide covers direct mounting, remote capillary mounting, extended and flanged seal configurations, fill fluid selection, and commissioning best practices for ABB and Rosemount installations in corrosive, high-temperature, and sanitary applications.
Complementary split range control (CSRC) deploys two actuators working in opposite directions to regulate a single process variable with high precision. This guide covers how CSRC works, valve sizing and fail-safe configuration, PID implementation in Foxboro I/A Series and Allen-Bradley ControlLogix, and step-by-step commissioning and tuning procedures for heat exchanger and reactor temperature control applications.
Choosing a selection results in a full page refresh.
