SEE " SETPOINT, TARGET"

TDC-2000 & TDC-3000 ARE COMPLETE COMPUTER-BASED PROCESS CONTROL SYSTEMS DEVELOPED BY HONEYWELL THAT PROVIDE THE MONITORING, CONTROLLING, & AUTOMATION OF A N INDUSTRIAL PLANT'S PROCESS CONTROL LOOP(s)/SYSTEMS

STANDS FOR TOTALLY ENCLOSED

STANDS FOR TOTALLY ENCLOSED, AIR OVER

STANDS FOR TOTALLY ENCLOSED, FAN COOLED

MANUFACTURED BY DuPONT, TEFLON IS A FLUOROCARBON-BASED POLYMER THAT IS USED FOR THE INSULATION OF WIRES.

STANDS FOR "TEMPERATURE COEFFICIENT".

STANDS FOR TOTALLY ENCLOSED, NON-VENTILATED

A TEMPERATURE SENSING DEVICE THAT IS CONSTRUCTED OF TWO DISSIMILAR METALS WHERIN A MEASURABLE & PREDICTABLE VOLTAGE IS GENERATED CORRESPONDING TO TEMPERATURE; SEE OUR WIDE-VARIETY OF THERMOCOUPLES STARTING ON Pg.____.

A FAIL-SAFE OPERATION THAT ASSURES DESIRED OUTPUT UPON AN OPEN THERMOCOUPLE CONDITION

THE JUMPER POSITION THAT DETERMINES WHETHER, WHEN A THERMOCOUPLE FAILS, ITS OUTPUT IS REPLACED BY A MILLIVOLTAGE WHICH WILL MATCH THE THERMOCOUPLE'S MINIMUM VALUE

THE JUMPER POSITION THAT DETERMINES WHETHER, WHEN A THERMOCOUPLE FAILS, ITS OUTPUT IS REPLACED BY A MILLIVOLTAGE WHICH WILL MATCH THE THERMOCOUPLE'S MAXIMUM VALUE

MEASURES AMBIENT TEMPERATURE AND CONTROLS OTHER DEVICES IN AN HVAC SYSTEM. THERMOSTATS COME IN A WIDE VARIETY AND ARE GENERALLY EITHER ELECTRIC-DELIVERED OR PNEUMATIC

SEE "CONTROL ACTION, PID"

THE CHANGE IN ANY VARIABLE SUCH AS TEMPERATURE, PRESSURE, ETC. REQUIRED TO CAUSE A CONTROLLER'S OUTPUT TO VARY A PRE-DEFINED RANGE.

THE AMOUNT OF CHANGE OF ANY VARIABLE SUCH AS TEMPERATURE, PRESSURE, ECT. NECESSARY FOR THE CONTROLLER TO DRIVE THE ACTUATOR(S) THROUGH THEIR COMPLETE STROKE(S)

A CONTROL ALGORITHM THAT EXPRESSES OUTPUT POWER ( 0-100% ) AS A FUNCTION OF PERCENT "ON" VS. PERCENT "OFF" WITHIN A PRESET CYCLE TIME

A CONTROLLER OUTPUT THAT IS ASSIGNED BY SOFTWARE TO FACILITATE TIME PROPORTIONAL CONTROL (GENERALLY A RELAY, SSR, OR SSR DRIVE OUTPUT)

TYPICALLY PRODUCES ROTATION OR TWISTING SUCH AS IN MOTORS

TOTAL PRESSURE IS MEASURED BY THE SUM OF STATIC AND VELOCITY PRESSURE

A PROCESS  CONTROLLER FUNCTION THAT DEFINES WHETHER THE LOCAL SETPOINT WILL TRACK THE REMOTE SETPOINT; WHEN THE CONTROLLER IS TRANSFERRED TO A LOCAL SETPOINT, THAT LOCAL SETPOINT VALUE WILL MATCH THE REMOTE PROCESS VALUE WHEN THE TRANSFER OCCURS

A DEVICE THAT CONVERTS ONE SIGNAL TO ANOTHER; EXAMPLE: CONVERTING A 4 TO 20 mA SIGNAL TO A 3 TO 15 PSI SIGNAL, AND VICE-VERSA

USED TO TRANSMIT DATA VIA A TWO WIRE CURRENT LOOP; A 2-WIRE TRANSMITTER IS LOOP POWERED. SEE OUR LARGE TRANSMITTER SECTIONS FOR HONEYWELL, FOXBORO, ROSEMOUNT, & DWYER TRANSMITTERS

USED TO TRANSMIT DATA VIA A CURRENT LOOP OR A DC VOLTAGE; A 4-WIRE TRANSMITTER USES 2 WIRES FOR DATA & 2 WIRES FOR POWER; SEE OUR LARGE TRANSMITTER SECTIONS FOR HONEYWELL, FOXBORO, ROSEMOUNT, & DWYER TRANSMITTERS

A SOLID STATE SWITCHING DEVICE USED TO SWITCH ALTERNATING CURRENT SIGNALS ON & OFF; TRIAC CIRCUITS ARE ALSO REFERRED TO AS SOLID STATE RELAYS OR SSR's

THE VALUE THAT DETERMINES WHEN THAT SET OF PID VALUES BECOMES ACTIVE

TERM USED TO DESCRIBE SOLID, LIQUID, AND VAPOR PHASES WHICH ARE ALL IN EQUALIBRIUM AT THE SAME TIME SO THAT THERE IS A "FIXED-POINT" TEMPERATURE OF THE MATERIAL THAT IS BEING MEASURED.

OFTEN USED IN DETERINING THE POWER OF A SIGNAL BY A MULTIMETER, IT STANDS FOR THE TRUE ROOT-MEAN-SQUARE VALUE OF AN AC OR AC + DC SIGNAL.

STANDS FOR "UNIVERSAL DIGITAL CONTROLLER", WHICH IS A PROCESS TEMPERATURE CONTROLLER MANUFACTURED BY HONEYWELL. UDC'S COME IN SERIES 2000, 3000, 5000, 6000, & 9000

STANDS FOR UNDERWRITERS LABORATORIES, INC., ESTABLISHES STANDARDS FOR PRODUCTS

APPROXIMATELY 380 NANOMETERS BELOW BLUE LIGHT, ULTRAVIOLET OR "UV" IS OFTEN DETECTED AS A PART OF THE FLAME IN BOILERS, BURNERS, OVENS, KILNS, AND INCINERATORS.

SEE "THERMOCOUPLE UPSCALE BURNOUT"

STANDS FOR ULTRA-VIOLET