Instrumentation & Process Control Bootcamp

Explore measurement and control theory through a doctor patient analogy, showing how data collection informs instrumentation and control actions and feedback to steer industrial processes.

Explore how raw materials are transformed into end products through processes in the process industry, and learn how process variables, or measurands, like pressure, temperature, flow, and pH guide control.

Differentiate field instrumentation from control room instrumentation and identify field sensors such as pressure, temperature, flow, level, density, pH, conductivity, plus key control room components like DCS and PLC.

Analyze how instrument error, set point, offset, drift, and load disturbance affect process control, illustrated by room temperature maintenance and valve-operated level changes.

Define accuracy as closeness to the true value, and explain how accuracy, precision, and sensitivity shape instrument performance, illustrated with target diagrams of four error states.

Explore range, span, and range ability for sensors and transmitters. Define lower range value and upper range value, ERV and LRT, and calculate span and range ability from instrument specifications.

Explain the concept of linearity in transmitter outputs, showing a 4–20 mA current corresponding to 0–100% input and an ideal straight-line relationship with linear errors.

Learn about standard instrumentation signals for controllers, including 0 to 10 volt DC, 4 to 20 milliamp current loops, and 3 to 15 psi pneumatic signals.

Prefer 4–20 ma current loops over 0–10 v dc signals for long distance, thanks to immunity to voltage drop, better noise resistance, intrinsic safety, live zero concept, and lower power.

Differentiate supply from signal; supply powers devices, while signal carries information and varies in voltage, current, or frequency, with 24-volt dc supplies for transmitters, sensors, and controllers.

Explore how sensors convert physical variables such as temperature, pressure, level, and flow into electrical signals, and how transducers and transmitters standardize and deliver those signals to controllers.

Two-wire ISA type-2 transmitters power from a DC supply and send 4 to 20 milliampere current loop signals (pressure, temperature, flow) to PLC or DCS.

Explain three-wire type-3 transmitters, where two wires power the transmitter and a third carries the 4 to 20 milliampere output signal, sharing a common ground and lacking isolation, increasing wiring complexity.

Explore four-wire ISA type-4 transmitters that power the transmitter separately from the 4–20 mA signal, reducing noise and delivering stable readings in magnetic flow meters.

Configure transmitter parameters such as engineering unit, sensor type, damping, time range, and zero and span via local keypad or via digital protocols through PC.

Identify contact-based object position sensors that use direct physical contact to measure position or displacement. Compare them with non-contact proximity sensors, noting high accuracy and reliability in harsh environments.

Identify limit switches as contact type object position sensors by IEC 60947 standards; they feature a switch body, operating head, and actuator for detecting presence, position, speed, and travel time.

Explore contact arrangement, NEMA and IEC symbols, compare snap action and slow break limit switches, and review actuator types such as roller lever, fork, and plunger with advantages and disadvantages.

Explore applications of limit switches across packaging, sawmills, food processing, CNC machines, lifts, and conveyors, then select by actuator type, force, travel, contact type, rating, body style, and IP rating.

Explore how an electromechanical relay uses a coil to attract a movable armature, closing or opening contacts, with ice cube relays in a multi-pin base socket for replacement.

Master IEC relay contact arrangements, including NO/NC, SPST, SPDT, and DPDT configurations, and learn two-digit IEC terminal numbering with coil designations A1 and A2.

Learn how interposing relays in PLC systems protect the controller by using a 24-volt DC coil to switch a 20-volt AC load, saving I/O cards and buffering against voltage spikes.

Explore limit switch interfaces with lamp indicators and PLC inputs, illustrating normally open and normally closed configurations and 24-volt DC power connections.

Observe a live demonstration of limit switches, including roller lever, adjustable roller lever, and spring rod with 360-degree actuation, plus no/nc contact configurations and a lamp load circuit.

Explore non-contact sensors including inductive, capacitive, ultrasonic, photoelectric, and non-mechanical magnetic proximity switches, and learn how IEC 60947 governs binary yes/no sensing in low-voltage switchgear.

Explore magnetic proximity reed sensors and read switches per IEC 62246/IEC 461 with hermetically sealed glass. Assess reliability factors like arcing, AC vs DC loads, and interference.

Learn how a two-wire reed sensor uses brown power and blue signal to energize a DC relay coil (A1 A2) and switch an AC load with a magnetic field.

Three-wire reed sensor circuits separate power and signal paths with brown, blue, and black wires, enabling relay-driven lamp illumination and providing higher signal stability and faster response than two-wire sensors.

Explore AL-39 and AL-39P reed switches, offering two-wire and three-wire options with LED actuation indicator, locking screw, 10–30V DC supply, 200 mA max load, for open/close feedback.

Watch a live demonstration of an ice cube electromagnetic relay on a relay interface board powered by 24-volt dc, wiring a lamp through common to energize and glow.

Demonstrates a two-wire reed switch sensor wired in series with a relay coil powered by 24-volt dc, with brown to positive and blue to the relay.

Demonstrate wiring a three-wire reed switch sensor and integrating it with a relay to control a double-acting pneumatic cylinder, mounting at ends or middle to adjust stroke length.

Inductive proximity sensors detect metallic objects using eddy currents, with a coil oscillator and circuitry, and come in shielded and unshielded types with different sensing ranges, offering no moving parts.

Understand nominal sensing distance, tolerances, and how voltages and temperatures outside rated values cause deviations. Learn standard targets and correction factors for sensor diameters such as m8 to m30.

Select sensors for specific processes by evaluating criteria such as output type (PNP or NPN), wire count, voltages, sensing distance, load current, and protection.

Explain how two-, three-, and four-wire sensors connect to output circuits, using brown, blue, black, and white wires, and how load placement and a common ground ensure proper operation.

Explore current sourcing and sinking in three-wire pnp and npn sensors: pnp sources current to the load, npn sinks current to ground, guiding sensor choice for plc or dcs inputs.

Demonstrates three-wire pnp sensor operation, showing current-sourcing output and inductive proximity sensing of metallic targets with a non-contact, load-connected setup.

Explore wiring differences between 3-wire NPN and PNP sensors, connect load to the positive and output for NPN, and perform fault finding with continuity checks and a 24-volt DC supply.

Explore capacitive proximity sensors with an electrode oscillator and detection circuits, detecting metallic and non-metallic targets via capacitance changes, offering advantages over inductive sensors and limitations from temperature and humidity.

Capacitive sensors offer adjustable sensitivity and threshold settings to fine-tune the sensing range for different targets and conditions, often via a potentiometer on the sensor's backside.

Explore industrial HTC m18 P08 sensor uses for liquid and solid level sensing, counting, and non-metallic target detection in conveyors and workstations, and learn that wire color varies by manufacturer.

Observe a three-wire pnp capacitive proximity sensor with red positive, black negative, and green output, detecting metal and non-metal targets and enabling non-contact liquid level sensing with water.

Explore how photoelectric sensors use emitters and receivers to detect objects by interrupted or reflected light, and compare through beam, retroreflective, and diffuse sensors.

Explore dark on operate and light on operate modes in photoelectric sensors, including nc/nno configurations for through beam, retroreflective, and diffuse sensors.

Explore photoelectric proximity sensors' long range, non-contact sensing, fast high-resolution response, and easy adjustment, including fiber optic cables used for counting IC pins and bottles in industrial automation.

demonstrates a retroreflective photoelectric sensor, its five-wire wiring and internal relay contacts, and how the lamp glows when the beam is unobstructed and turns off when obstructed by the reflector.

See a live demonstration of a four-wire NPN diffuse beam sensor with no nc, up to 50 cm range, and how objects act as reflectors.