Control theory, process concepts, and general industrial-automation terms. This page (2 of 6) covers Control Valve Sizing to GC Cross-Verification.
Control theory, process concepts, and general industrial-automation terms.
Turning flow, pressure drop, and fluid into a required Cv, and why oversizing wrecks control.
Read → GlossaryThe pump-and-heat-exchanger unit that isolates facility water from the clean cold-plate loop and holds its setpoints.
Read → GlossaryThe gap between cooled gas outlet and ambient that is the key health KPI for air-cooled exchangers.
Read → GlossaryHolds process outlet temperature by staging fans, modulating louvers, and recirculating warm air for freeze protection.
Read → GlossaryThe evaporative heat-rejection stage for condenser-water and process cooling loops - open vs closed circuit, drift, and blowdown.
Read → GlossaryThe high-pressure hardware that lets crews insert and retrieve coupons and probes on a live line without shutdown.
Read → GlossaryThe sacrificial extra wall thickness in pipe and vessel design consumed by corrosion over service life.
Read → GlossaryThe pre-weighed metal strip whose weight loss gives an internal corrosion rate in mils per year.
Read → GlossaryThe film-forming chemical injected into wells and pipelines to slow internal corrosion.
Read → GlossaryThe wall-loss speed in thousandths of an inch per year that drives remaining-life and inspection-interval decisions.
Read → GlossaryThe hidden external corrosion that attacks insulated piping where moisture is trapped under jacketing.
Read → GlossaryCoulometric suits ppm-level trace water, volumetric suits percent-level water; the sample's water level picks the mode.
Read → GlossaryHow a 16- or 32-bit register wrapping to zero produces a false negative flow delta, and how rollover handling corrects it.
Read → GlossaryHow crank counterweights offset rod-string weight so the gearbox and motor share the load evenly across the stroke.
Read → GlossaryThe buried anode array that discharges impressed CP current, its materials, resistance, and replacement signals.
Read → GlossaryThe DC power unit that drives protective current into a pipeline through an anode groundbed.
Read → GlossaryThe API 1130 software approach that infers leaks from SCADA flow, pressure, and temperature.
Read → GlossaryThe precision computer room air conditioner that keeps control rooms and server rooms at a tight, stable temperature and humidity.
Read → GlossaryBalancing carrying cost against stockout downtime using failure rate, lead time, and target availability.
Read → GlossarySelector logic that forces air to lead fuel on load increase and fuel to lead air on decrease, keeping combustion fuel-lean.
Read → GlossaryThe maintained lookup that maps source point IDs to target tag names, its governance, and how stale entries cause drift.
Read → GlossaryJumpering field terminals to specific I/O channels so field cable order need not match card order.
Read → GlossaryThe cryo route for deep NGL recovery, cold boxes, ethane recovery versus rejection, and cold-end monitoring.
Read → GlossaryPeriodically replacing keys to limit exposure, with graceful overlapping rollover so field assets stay online.
Read → GlossaryWhy a CT stops reproducing fault current faithfully and can mis-operate a relay.
Read → GlossaryCTPL is CTL times CPL, reducing flowing liquid volume to base temperature and pressure for net standard volume.
Read → GlossaryThe standard soil half-cell behind buried-pipeline CP potentials and the -850 mV protection criterion.
Read → GlossaryA fuse that clears a fault in under a half-cycle to cut peak let-through current and arc-flash energy.
Read → GlossaryThe end-of-gas-day artifact: per-well oil, gas, water, run tickets, downtime codes, and comments feeding accounting.
Read → GlossaryLinear device-to-device wiring via two-port switches, its cabling savings, cascade risk, and how it becomes a ring.
Read → GlossaryThe DU failure class that diagnostics miss and only a proof test reveals, and why it dominates PFDavg.
Read → GlossaryBright-field lights flat surfaces bright; dark-field low-angle light lights only edges, scratches, and engraving.
Read → GlossaryThe interaction that moves an operator from an enterprise roll-up to site, equipment, and a single tag trend.
Read → GlossaryThe field device that aggregates many downstream RTUs and meters onto one upstream link to the host.
Read → GlossaryWrapping raw values in units, asset, location, and quality metadata so a number becomes meaningful, usable data.
Read → GlossaryA hardware device that physically enforces one-way data flow out of an OT network, letting monitoring data leave while blocking any return path.
Read → GlossaryBringing readings onto common units and scales - engineering-unit conversion and statistical scaling - for trustworthy analytics.
Read → GlossaryHow a chatty poll rate or stuck retry loop blows past a pooled-data cap, and how to budget bytes per site.
Read → GlossaryMetadata marking a value good, bad, stale, or uncertain - so bad data is excluded rather than silently corrupting analytics.
Read → GlossaryAdjusting pressures from different gauge depths to a common reference so wells and depletion trends compare fairly.
Read → GlossaryThe small buffer tank holding a day of generator fuel, kept topped by transfer pumps and level-alarm logic.
Read → GlossaryAn above-ground survey that pinpoints pipeline coating defects and ranks their severity by %IR.
Read → GlossaryThe 79 cycle timing: arc-deionization dead time, the reset reclaim window, and lockout.
Read → GlossaryA holding queue for messages that repeatedly fail, so they neither block the flow nor vanish silently.
Read → GlossaryA timer that drives an RTU or process to a safe state when the SCADA host stops refreshing it over a dead link.
Read → GlossaryThe primary pressure standard - piston, cylinder, and calibrated weights - used to calibrate transmitters and gauges.
Read → GlossaryThe ratio of successive overshoot peaks, the classic quarter-amplitude target, and why smoother is now preferred.
Read → GlossaryCompensators that cancel one loop's effect on another so interacting loops can be tuned as if independent.
Read → GlossaryWhen a neural net beats rule-based vision on variable defects, the training workflow, and its honest costs.
Read → GlossaryWhy solar sites need thick-plate deep-cycle chemistry, what happens with a starting battery, and how to tell them apart on the datasheet.
Read → GlossaryThe gap between potential and actual production, attributed by cause and automated from SCADA downtime data.
Read → GlossaryRegulated deficit irrigation, allowable depletion, and holding stress bands with soil and ET data in automation.
Read → GlossaryClearing frost from evaporator coils: electric, hot gas and off-cycle methods, demand initiation and staggering.
Read → GlossaryThe temperature rise across IT gear and drop across coils, and why a low delta-T signals bypass air and wasted fans.
Read → GlossaryThe window power is averaged over for peak demand; fixed and sliding windows record different peaks for the same load.
Read → GlossaryA meter that captures the maximum average power over a defined interval, setting a large share of an industrial bill.
Read → GlossaryHow demand rate splits safety functions into low-demand (PFD) and high or continuous demand (PFH) reliability math.
Read → GlossaryDeriving demands per year from initiating-event frequencies, the once-per-year boundary, and using SCADA logs as evidence.
Read → GlossaryThe cold distillation tower that splits methane to sales gas from heavier NGLs in a cryo plant.
Read → GlossaryThe treating chemical that breaks oil-water emulsions so water drops out of crude - how it works and how it is dosed.
Read → GlossaryThe vibrating-element density meter behind API gravity and custody-transfer volume corrections.
Read → GlossaryChecking an in-line density meter against a reference in service, and why an unverified density biases net standard volume.
Read → GlossaryA sensor string that maps a separator or desalter top to bottom, tracking oil, emulsion, and water bands.
Read → GlossaryCorrecting hydrostatic level for density that shifts with temperature or composition, and computing mass at the same time.
Read → GlossaryA static swirl device that spins oil out of produced water, tuned by the pressure drop ratio.
Read → GlossaryThe fraction of a bank you use before recharging, its inverse tie to cycle life, and why a conservative DoD inflates bank size.
Read → GlossaryThe range of distances where a part stays sharp, and why it trades directly against light and speed.
Read → GlossaryThe filter that tames measurement noise so derivative action stays usable on noisy flow and pressure loops.
Read → GlossaryRate action, derivative kick, and why most oil and gas flow and pressure loops set it to zero.
Read → GlossaryThe factor F that caps how much of a pipe's yield strength it may use, tied to class location and the Barlow equation.
Read → GlossaryHow an attemperator sprays water into superheated steam to control temperature, and why it is severe service.
Read → GlossaryA device that stops a supersonic flame front in vapor piping, distinct from a deflagration or flame arrestor.
Read → GlossarySubsonic flame versus supersonic shock, and how run-up distance decides which arrestor you need.
Read → GlossaryRunning hundreds of remote gateways as one fleet: health telemetry, grouping, bulk config, and remote diagnostics.
Read → GlossarySecurely registering new field gateways with a cloud platform via identity, certificates, and zero-touch onboarding.
Read → GlossaryODVA's EtherNet/IP ring protocol using embedded switches and a beacon-driven supervisor to heal a break in under 3 ms.
Read → GlossaryThe CAN-based CIP fieldbus that carries 24V power and data on one cable using MAC IDs and poll/strobe messaging.
Read → GlossaryKeeping natural gas dry of water and heavy hydrocarbons so it will not condense liquids in the pipeline.
Read → GlossaryThe buffer between measured dew point and the coldest downstream temperature, trended to catch a failing dehydration bed.
Read → GlossaryThe share of dangerous failures caught automatically by online diagnostics, moving them from undetected to detected.
Read → GlossaryAlternating diaphragm chambers displace fixed gas volumes; the standard low-pressure fuel-gas PD meter.
Read → GlossaryThe fluid-filled isolator that protects transmitters and gauges from corrosive, viscous, or plugging media.
Read → GlossaryThe flexible-diaphragm valve that seals the flow from the actuator - weir vs straight-through, for corrosive and sanitary duty.
Read → GlossaryThe 60-to-30-second megohm ratio, a short-form cousin of the polarization index for quick insulation checks.
Read → GlossaryWhy a liquid's permittivity decides if radar and capacitance can see it, and how low-DK hydrocarbons are handled.
Read → GlossaryHow network pumps hold a dP setpoint at the critical consumer, and how floating setpoints cut pump energy.
Read → GlossaryMeasuring level in a closed vessel by subtracting vapor-space pressure from the head at the bottom tap.
Read → GlossaryThe discrete input card that senses on/off contacts, with filter times, voltage groups, and dry/wet wiring.
Read → GlossaryA smart form with conditional logic, required photo and reading fields, and pass-fail steps that enforce and prove completion.
Read → GlossaryThe discrete output card that switches loads, comparing relay, transistor, and triac outputs plus load limits.
Read → GlossaryHow closely a twin mirrors reality, and the tradeoff between high-fidelity physics and lightweight data-driven models.
Read → GlossaryA step-by-step guided procedure on a device with embedded media, data-capture steps, and sign-offs that cuts error versus paper SOPs.
Read → GlossaryInert N2 and CO2 lower gross heating value and shift compressibility; GPA 2172 and the AGA 8 gross method treat them explicitly.
Read → GlossaryThe 35 mm snap-on rail that mounts terminal blocks and components inside a control panel, and why it is the wiring backbone.
Read → GlossaryThe four-step survey-and-dig method that proves integrity on unpiggable lines, including ECDA, ICDA, and SCCDA.
Read → GlossaryHow residual current plus a zero-sequence reference decides fault direction on ring and parallel feeders.
Read → GlossaryThe watched maximum discharge temperature whose rise is the earliest sign of a leaking valve or ring.
Read → GlossaryControlling pump flow by closing a discharge valve, why it wastes energy as pressure drop, and how it compares to VFD control.
Read → GlossaryThe manual isolator (non-load, load-break, or fused) that creates a visible, lockable break for safe maintenance and lockout.
Read → GlossaryWhy a drive can show good displacement power factor yet be penalized once harmonic distortion lowers true power factor.
Read → GlossaryHow fast an HMI screen appears when requested, the one-second target, and how cloud SCADA meets it with thin graphics and caching.
Read → GlossaryA systematic scheme for HMI screen IDs, such as area-unit codes, that lets operators call up screens fast and engineers manage hundreds.
Read → GlossaryA grid of screen previews that lets operators pick displays visually instead of by name or menu tree.
Read → GlossaryThe online ppb-level instrument that verifies scavenger performance and detects air ingress in water.
Read → GlossaryA feedback loop that modulates blowers or air valves to hold basin DO at setpoint and cut aeration energy.
Read → GlossaryThe vented spacer between cylinder and crankcase that keeps process gas out of the compressor oil.
Read → GlossaryThe plates that stage vapor-liquid contact in a fractionation tower, and the tags that reveal their health.
Read → GlossaryThe wellbore fiber used as a dense acoustic array for flow, sand and leak detection, and frac monitoring.
Read → GlossaryFiber optics that read a continuous temperature profile down the whole wellbore to find inflow, injection, and leaks.
Read → GlossaryA sealed, metered zone that measures inflow against consumption to quantify losses and find leaks.
Read → GlossaryUsing different level-measurement principles for control and safety so one process condition cannot fail both.
Read → GlossaryHow ratio and efficiency tags fail when the denominator hits zero, and the guard logic that keeps trends sane.
Read → GlossaryCatching data smuggled inside DNS queries by watching query volume, entropy, and subdomain length against a quiet baseline.
Read → GlossaryA running app started from a portable Docker image, built by a Dockerfile and shared through a registry.
Read → GlossaryA regulator whose dome reference pressure sets the outlet, enabling remote electronic setpoint changes and tighter control.
Read → GlossaryThe two-seat arrangement with a bleed between that gives verified positive isolation for safe maintenance.
Read → GlossaryThe two-timer pulse-interpolation method that lets a small-volume prover resolve fractional meter pulses.
Read → GlossaryThe polymer that cuts pipeline friction to boost throughput.
Read → GlossaryThe bare conductor that earths a cable's foil screen, and why single-point grounding of the drain kills noise.
Read → GlossaryThe slow aging-driven creep in a healthy instrument's reading, and how the stability spec sets intervals.
Read → GlossaryThe heavy tubular above the bit that supplies weight on bit and keeps drill pipe safely in tension.
Read → GlossaryThe fluid density that sets hydrostatic pressure and must stay inside the pore-pressure to fracture window.
Read → GlossaryAutomating drip zones, pressure-compensating emitters, flushing, clog detection, and over-pressure protection.
Read → GlossaryThe non-contacting gas-film seal on a centrifugal compressor, watched through vent flows and seal differential pressure.
Read → GlossaryQuick-connect coupler that seals both halves on disconnect to stop spill and vapor, with sensing that feeds the rack permissive.
Read → GlossaryA host with two NICs on different networks; safe as a data broker, dangerous if it silently bridges your segments.
Read → GlossaryTwo carrier SIMs in one modem with automatic switchover - carrier redundancy for remote sites, explained.
Read → GlossaryAutomating water sprays and fog cannons by conveyor status, wind, and PM10 feedback to spray only when needed.
Read → GlossaryOne unit runs while another waits and auto-starts on fault or demand, with duty rotation to balance run hours.
Read → GlossaryFast IGBT edges plus long motor leads double the voltage at the motor terminals, destroying winding insulation.
Read → GlossaryKeeping a stable hostname pointed at a gateway whose public IP changes, and why a fixed-IP SIM is often preferred.
Read → GlossaryThe one-half-rho-v-squared kinetic term pitot tubes and DP meters convert into velocity, and why gas needs density compensation.
Read → GlossaryThe load-vs-position plot that diagnoses rod-pump faults - gas lock, fluid pound, and worn valves.
Read → GlossaryThe EPA portal for submitting GHGRP and Subpart W reports: accounts, web-form versus XML entry, checks, and the deadline.
Read → GlossaryFeed metered throughput, vent, and flare data into the Subpart W equations and file by web form or XML before March 31.
Read → GlossaryThe common busbar where earths land, and why clean and dirty earth separation with single-point grounding kills noise.
Read → GlossaryUsing cool outdoor air for free cooling, with dry-bulb vs enthalpy changeover and why stuck dampers waste energy.
Read → GlossaryHow induced eddy currents change a coil's impedance to measure a gap, and why gap voltage maps to shaft position.
Read → GlossaryRunning thresholds, aggregation, and ML inference at the gateway to cut latency and cellular bandwidth.
Read → GlossaryHow a gateway slows or sheds acquisition as its forward buffer fills, degrading gracefully not crashing.
Read → GlossaryThe rugged compute box between field devices and the cloud doing protocol translation, buffering, and secure links.
Read → GlossaryThe boundary device that connects a remote site to the WAN and handles NAT, firewall, VPN, and failover - explained.
Read → GlossaryOn-delay and off-delay filtering at the gateway that stops a chattering discrete input flooding upstream.
Read → GlossaryThe method that uses a corrosion feature's real river-bottom profile to find a less conservative burst pressure.
Read → GlossaryThe d10 and UC that specify granular media and govern clogging, penetration, and replacement.
Read → GlossaryThe motor-and-gearbox drive (MOV) that opens and closes valves at remote, no-air sites with torque and limit control.
Read → GlossaryInfrared survey of energized gear that finds hot spots and ranks them by delta-T for repair.
Read → GlossaryThe series of cells that splits water into hydrogen and oxygen, monitored by per-cell voltage and stack current.
Read → GlossaryA stored master-to-slave position table that reproduces a mechanical cam's nonlinear motion in software.
Read → GlossarySlaving a follower axis to a master's position at a programmable ratio, replacing mechanical gears and lineshafts.
Read → GlossaryThe shift from paper to agency portals and structured uploads, where one validated data layer feeds many filings.
Read → GlossaryThe live, entry-by-entry digital log operators write into during a shift, timestamped, searchable, and tag-linked.
Read → GlossaryThe treater that uses a high-voltage grid to coalesce water from crude - a distinct method beyond thermal treating.
Read → GlossaryCouplant-free ultrasonic crack detection for dry gas lines, and where it sits versus liquid-coupled UT.
Read → GlossaryThe large fire-sized vent that opens on over-pressure to keep a storage tank from rupturing.
Read → GlossaryThe fire-case relief flow a tank needs, from wetted area and heat input through credits to required airflow.
Read → GlossaryThe red mushroom button and its hardwired fail-safe circuit that halts equipment on demand.
Read → GlossaryThe 0-to-1 setting that governs IR accuracy, why shiny metal wrecks readings, and how to calibrate it.
Read → GlossaryThe magmeter safeguard that forces flow to zero and alarms when the pipe is not full.
Read → GlossaryA shrouded ground unit that hides the flame and holds a fixed combustion temperature to prove destruction efficiency.
Read → GlossaryHow a flow computer turns corrected volume and heating value into billable MMBtu and dekatherms.
Read → GlossaryA central backbone that routes, transforms, and mediates messages among many enterprise applications.
Read → GlossaryMatching a barrier's Voc, Isc, Ca, La against a device's Vmax, Imax, Ci, Li plus cable to verify an IS loop on paper.
Read → GlossaryBand-pass filtering and demodulating high-frequency acceleration to expose bearing impacts before the velocity spectrum does.
Read → GlossaryThe portable-analyzer procedure for screening equipment leaks, with a ppm threshold and probe technique.
Read → GlossaryEPA New Source Performance Standards limiting methane and VOC emissions from oil and gas, driving leak detection and repair.
Read → GlossaryThe annual greenhouse-gas reporting rule for oil and gas facilities - source categories, methods, and thresholds.
Read → GlossaryAnnual chemical-inventory thresholds, the March 1 deadline, and how stored quantity data streamlines the reported amounts.
Read → GlossaryA periodic controlled overcharge that remixes electrolyte and rebalances flooded cells, and why it must be off for sealed and lithium.
Read → GlossaryReusable equipment-resident code that answers phase commands and drives real I/O, distinct from the recipe phase.
Read → GlossaryThe dynamic mud density from annular friction that narrows the drilling margin and is tracked by PWD tools.
Read → GlossaryThe online electrical-resistance probe that streams live internal metal-loss data to SCADA.
Read → GlossaryA probe or acoustic detector that quantifies sand production and erosive wall loss to protect flowline components.
Read → GlossaryNonlinear control whose gain rises with error size, so the loop ignores small deviations but reacts hard to large ones.
Read → GlossaryThe defeating conditions that erode a bowtie barrier, the controls that manage them, and the live signals that reveal decay.
Read → GlossaryThe no-ack window that escalates an alarm to the next contact when the current recipient does not acknowledge in time.
Read → GlossaryHow RFC 7030 lets field devices automatically request and renew certificates from a CA, versus legacy SCEP.
Read → GlossaryThe total volume a well will produce to its economic limit, built from decline curves and metered cumulatives.
Read → GlossaryHow a reference clock, propagation-delay compensation and SYNC signals give sub-microsecond sync across slaves.
Read → GlossaryHow defined slave groups can be connected or removed during operation without faulting the segment, for modular machines.
Read → GlossaryTracking charger availability and session success to catch faulted or offline stations and trigger remote resets.
Read → GlossarySharing a fixed grid capacity across chargers, throttling sessions to stay under the site budget and cut demand charges.
Read → GlossaryThe crop's daily water loss, plus reference ET0, crop coefficient Kc, the soil water balance, and automated scheduling.
Read → GlossaryHow an EFM computer closes totals on the even hour and rolls the day at the contract hour.
Read → GlossaryA recursive average that weights recent samples more heavily and stores just one value per tag.
Read → GlossaryThe practice of monitoring wells by working a ranked exception list of rule breaches instead of reviewing every well.
Read → GlossaryThe semiannual and annual filings disclosing exceedances and monitor gaps, auto-fed by SCADA alarm history.
Read → GlossaryWhy certificates say plus or minus X at k equals two, and how to compare uncertainty figures fairly.
Read → GlossaryEpsilon corrects orifice flow for the gas density drop across the plate; it falls below one as differential pressure rises.
Read → GlossaryThe flameproof housing that contains an internal blast and cools escaping gas, how flame paths work, and where it is used.
Read → GlossaryBack-calculation that feeds the real downstream value into a controller's integral to stop cascade and selector windup.
Read → GlossaryPoint-of-use and central systems that destroy or scrub PFCs, acids, and flammables from tool exhaust, monitored for uptime.
Read → GlossarySensor network that catches silane, arsine, and hydride leaks in gas cabinets and subfabs, interlocking to shutoff and abatement.
Read → GlossaryThe shop checkpoint where a customer verifies a control or SCADA package before shipment, with punch items.
Read → GlossaryHow spring and air action set a valve's safe failure position, and why HAZOP picks it - not convenience.
Read → GlossaryLogic that calls a backup pump when the lead gives no run confirmation, keeping the station pumping.
Read → GlossaryRestoring a recovered primary after failover - auto vs manual, the resync step, and avoiding a failback storm.
Read → GlossaryThe dwell time that stops dual-SIM or dual-WAN failover from flapping back and forth on a marginal link.
Read → GlossaryAntisurge valve that strokes open in under a second on a trip using boosted actuation, delivering hot recycle before surge.
Read → GlossaryThe specified time an SIS has to reach a safe state after detecting a fault, and why exceeding it voids the safety claim.
Read → GlossaryThe total time from a fault to a hazard, and how the SIS budgets detection, reaction and stroke time inside it.
Read → GlossaryHow closed-loop control corrects error after it appears, how it differs from feedforward, and its role in process control.
Read → GlossaryHow it corrects for a measured disturbance before the process variable moves, and why it pairs with feedback.
Read → GlossaryPerimeter air monitoring that measures what leaves a site's boundary, with an action level that triggers root-cause work.
Read → GlossaryDelivering dissolved fertilizer through irrigation water, plus injection pumps, EC dosing, and chemigation safety.
Read → GlossaryHow the unit meters A/B tanks and acid inline to hold target EC and pH, with probe feedback and recipe logging.
Read → GlossaryBalancing a rotor in place with trial weights to cancel 1x unbalance vibration.
Read → GlossaryThe field enclosure where instrument cables gather onto a multicore before the long run to the control room.
Read → GlossaryThe two separate power domains on an I/O card, how isolation separates them, and how to size and fuse each.
Read → GlossaryA non-intrusive matrix of external electrodes that tracks electric-field change to sense internal wall loss.
Read → GlossaryChoosing the capillary fill fluid, and how temperature on the capillary shifts the reading.
Read → GlossaryThe automated PLC sequence that regenerates a water filter: trigger, scour, backwash, settle, return.
Read → GlossaryThe pressure drop across a filter bed that rises with clogging and helps trigger backwash.
Read → GlossaryThe post-backwash turbidity spike and the diversion that keeps it out of finished water.
Read → GlossaryThe valve and actuator subsystem that reaches safe state and usually dominates a safety loop's PFD.
Read → GlossaryThe detection system that senses fires and gas releases with flame, smoke, and gas detectors, then alarms, mitigates, and can trigger ESD.
Read → GlossaryHow external-fire heat input to wetted area per API 521 boils liquid into vapor and sizes the relief valve.
Read → GlossaryThe submerged U-tube firebox that heats fluid inside a treater or line heater, guarded by level and temperature limits.
Read → GlossaryHolding the slight negative firebox pressure with damper and registers, balancing safety and excess air.
Read → GlossaryHow a process heater transfers heat in the firebox and stack, and the tags that guard the flux limit.
Read → GlossaryA device verifies the vendor signature before accepting an update, blocking tampered or counterfeit firmware.
Read → GlossaryA controller dropping heaters, cameras, and reporting rate in priority order as the battery sags, to keep core telemetry alive.
Read → GlossaryAutomatic feeders dosing pellet rations by schedule or appetite, with load-cell hoppers and feed-conversion logging.
Read → GlossaryFailures per billion device-hours, how it relates to lambda and MTBF, and how component FIT rates roll up.
Read → GlossaryThe API 579 / B31G evaluation that decides whether corroded equipment can run, be repaired, or be replaced.
Read → GlossaryThe standard cone-roof atmospheric tank - construction, vapor space, and breathing losses - explained for oil and gas storage.
Read → GlossaryThe metal-matrix element that quenches a flame front on tank vents to protect the vapor space.
Read → GlossaryThe capped time from flame loss to fuel shutoff, what counts toward it, and how it is verified at commissioning.
Read → GlossaryThe hydrogen-flame detector that quantifies hydrocarbons in GCs and THC/VOC analyzers.
Read → GlossaryA GC detector that burns eluent in a hydrogen-rich flame and reads the light sulfur or phosphorus emit, for selective detection.
Read → GlossaryHow a flame rectifies AC sensing voltage into a DC microamp signal that proves flame and rejects shorts.
Read → GlossaryA monthly report of flared and vented volumes by cause, made defensible by a metered flare header and categorized event logs.
Read → GlossaryGas that flashes out of oil dropping from separator to tank pressure - the dominant tank emission source.
Read → GlossaryThe seconds-long, high-intensity mixing step that disperses coagulant to destabilise colloids.
Read → GlossaryAn unsegmented OT network where every device reaches every other, letting malware and broadcast storms spread unchecked.
Read → GlossaryThe disc, gear, or spacer coupling that transmits torque while tolerating misalignment, and how its wear appears in vibration.
Read → GlossaryFloat switches take over pump start and stop when the primary level transmitter fails, with an alarm for a technician.
Read → GlossaryThe simple buoyant point-level switch for pump control and high-level trips - and why it backs up transmitters.
Read → GlossaryThe raise, lower, and hold mode for motor-operated valves and dampers - integrating control distinct from PID.
Read → GlossaryThe tank whose roof floats on the product to kill evaporative losses - external vs internal, pontoons, and rim seals - explained.
Read → GlossaryA swing line that draws product from just below the surface to avoid bottom water and ship on-spec product.
Read → GlossaryThe density-based adjustment that removes the product a floating roof displaces to recover true tank volume.
Read → GlossaryThe gently mixed, tapered-energy basin where destabilised particles grow into settleable floc.
Read → GlossaryTelemetered rain and river-stage gauges feeding forecast models and tiered alerts that escalate to authorities and the public.
Read → GlossaryThe damaging shock when a plunger slaps a partly filled fluid column, seen as a sharp load drop on the dynamometer card.
Read → GlossaryFlush seals sit at the wall with no dead leg; extended seals reach past insulation into the process for plugging service.
Read → GlossaryThe two ways radar level gauges time microwaves - frequency sweep versus timed pulses - and what each buys you.
Read → GlossaryFoam fools each technology differently; reconcile a liquid-following method against a surface method and alarm on divergence.
Read → GlossaryApplied BOD load divided by biomass, a loading ratio that diagnoses under- and overloading and bulking risk.
Read → GlossaryThe three-number model, gain, time constant, and dead time, that every tuning rule fits to a step test.
Read → GlossaryThe pressurized pipe that carries lift-station discharge to a gravity manhole or plant.
Read → GlossaryTrapped air at a pipeline high point that throttles flow and raises head, spotted by flow-versus-pressure trending.
Read → GlossaryFD fans push air into the windbox; ID fans pull flue gas out the stack. How they set firebox pressure and feed the BMS.
Read → GlossaryThe yearly per-well report of monthly injected volumes and maximum surface pressures, fed cleanly by continuous logging.
Read → GlossaryThe acquisition card that receives raw pixels into host memory, key for high-bandwidth, deterministic capture.
Read → GlossaryMeasuring the gap between the tailings pond surface and the dam crest to prevent an overtopping failure.
Read → GlossaryThe hopping modulation that lets license-free field radios resist interference and share the band.
Read → GlossaryThe early phase that turns an automation concept into a defined, costed scope before detailed design.
Read → GlossaryBelow freezing, moisture frosts rather than condenses, so frost point runs several degrees warmer than the dew point.
Read → GlossaryUsing the latent heat of freezing water to protect crops, plus wet-bulb triggers, critical temperature, and auto-start.
Read → GlossaryThe fiberglass-reinforced-plastic tank that resists produced water and chemical corrosion that eats steel.
Read → GlossaryPackaged skid that scrubs, heats, and regulates fuel gas for a compressor driver, holding superheat above the dew point.
Read → GlossaryClosed-loop and mechanical control that holds a stable fuel supply pressure across load swings with regulators and trips.
Read → GlossaryThe skid that conditions and supplies clean, dry, regulated gas to engines, heaters, generators, and flare pilots.
Read → GlossaryA directional spectrum from XY probes that splits each frequency into forward and reverse precession to diagnose whirl.
Read → GlossaryThe full-travel test that strokes a shutdown valve fully closed to prove it reaches the safe state and seals.
Read → GlossaryDividing an unseparated multiphase stream back to individual wells using well tests.
Read → GlossaryThe powder epoxy fused onto pipe exteriors as the primary external corrosion barrier, backed by cathodic protection.
Read → GlossarySwitching between multiple tuning sets across operating regions to control nonlinear loops like tanks and pH.
Read → GlossaryHow transformer or optical coupling passes a signal with no direct connection, breaking ground loops.
Read → GlossaryThe Beer-Lambert attenuation physics that lets gamma gauges read brutal media non-intrusively through a vessel wall.
Read → GlossaryThe downhole separator that keeps free gas out of a rod pump to stop gas lock and restore fillage.
Read → GlossaryThe vertical degasser that flashes residual gas out of oil before the stock tank to cut tank vapors and emissions.
Read → GlossaryAutomated evacuate-and-backfill sequence that clears moisture and residual gas from a fab panel at cylinder changeout.
Read → GlossaryHow regulators use captured-versus-flared volumes to limit routine flaring, and how metered volumes are reconciled to report it.
Read → GlossaryThe fixed 24-hour accounting window, often starting at 9 a.m., that flow computers use to roll up daily gas volumes.
Read → GlossaryContinuously sensing combustible, toxic, and oxygen hazards, the sensor technologies involved, and how detection drives site safety.
Read → GlossaryFixed detection for combustible gas, H2S, and oxygen - sensor types, percent LEL vs ppm, and the safety role.
Read → GlossaryHow gas is sold on energy (MMBtu, dekatherms) by tying chromatograph heating value to metered volume.
Read → GlossaryThe two-stage vessel that filters solids and coalesces fine liquid aerosols to polish a gas stream.
Read → GlossaryThe ratio of reservoir gas volume to standard-condition volume that captures gas expansion for reserves and measurement.
Read → GlossaryA continuous relative-density instrument used as an independent backup to the GC, and how a host reconciles the two.
Read → GlossaryThe monthly workflow reconciling nominations against measured deliveries, with cashout, trading, and aging.
Read → GlossaryThe monthly scheduled-versus-actual record, tolerance bands, cash-out, and trending to zero with SCADA.
Read → GlossaryHow free gas in the pump barrel compresses instead of liquid, robbing displacement and gas-locking the pump.
Read → GlossarySum each mole fraction times its GPA 2145 molar mass, how it feeds relative density, and how a mislabeled component skews it.
Read → GlossaryThe daily cycle for scheduling pipeline gas, its nom windows, and reconciling scheduled against actual flow.
Read → GlossaryThe system that injects mercaptan or THT odorant into natural gas for leak-detection safety, proportional to gas flow.
Read → GlossaryThe midstream facility that conditions raw gas into pipeline-quality methane and recovers natural gas liquids.
Read → GlossaryThe monthly statement a plant issues each producer: inlet in, products out, fuel and shrink deducted.
Read → GlossaryA financial ledger reconciling shippers who inject high- and low-BTU gas but all receive average-quality gas at delivery.
Read → GlossaryThe tariff bands for BTU, H2S, sulfur, CO2, water, dew point, and oxygen, rolled into one spec-compliance status.
Read → GlossaryFollowing energy content through a pipeline as streams commingle and travel with line-pack delay to assign the right BTU.
Read → GlossaryConfirming a safe atmosphere by LEL, oxygen, and toxic tests before hot work or entry.
Read → GlossaryThe prime mover that drives pipeline compressors: gas-generator and power-turbine layout, EGT and speed control, and hot-section trending.
Read → GlossaryThe standard cubic feet of gas produced per barrel of oil, tracked per well as a reservoir and production diagnostic.
Read → GlossaryThe rising-stem isolation valve used across oil and gas piping.
Read → GlossaryA continuously changing value a gateway publishes so the host can tell a live-but-idle site from a silently dead one.
Read → GlossaryThe steel tape and innage or outage bob used to hand-gauge a tank, and how it differs from automatic gauging.
Read → GlossaryPulling a spot cylinder sample to a reference lab and reconciling it against the online GC to confirm accuracy.
Read →Merobix is cloud SCADA for oil & gas - it reads the instruments and protocols defined here into one dashboard.
We respond within 1 business day.