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Love Series 2600 Temperature/Process Controller

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Series 2600 Temperature/Process Controllers set a new standard for quality, versatility, ease-of-use and value. While they include a high level of standard features, many function setup items appear in the control menu only when the function is selected, so you don’t have to wade through unnecessary items. Units feature a universal input for thermocouple types J, K, E, T, L, N, B, C, S & R; RTDs 100Ω Plt. NIST, 100Ω Plt. DIN, 120Ω Ni Industrial, 1000Ω Plt. DIN; differential input (-10 to +10 mV DC)and process input (0 to 20 mA DC, 0 to 10 VDC). A standard 24 Volt isolated, regulated power supply is included to operate most standard 4-20 mA transmitters. Standard features include Self-Tune, Fuzzy Logic, fully adjustable PID, Auto/Manual control with bumpless transfer and front panel activation key, percent output indication, peak and valley indication, loop break protection and indication. For process inputs, the display is fully programmable from -1999 to +9999 with selectable decimal point location. Most thermocouple and RTD inputs can show whole or tenth degree displays. The Series 2600 is available with single or dual setpoint outputs and can be programmed for on-off, PID or heat/cool or latching alarm. All outputs are isolated from the inputs. Outputs include 10 Amp relay and 0-20 mA DC (scalable).

General Info

A proportional-integral-derivative controller (PID controller) is a generic control loop feedback mechanism (controller) widely used in industrial control systems. A PID controller calculates an "error" value as the difference between a measured process variable and a desired setpoint. The controller attempts to minimize the error by adjusting the process control outputs. The PID controller algorithm involves three separate constant parameters, and is accordingly sometimes called three-term control: the proportional, the integral and derivative values, denoted P, I, and D. Simply put, these values can be interpreted in terms of time: P depends on the present error, I on the accumulation of past errors, and D is a prediction of future errors, based on current rate of change.[1] The weighted sum of these three actions is used to adjust the process via a control element such as the position of a control valve, a damper, or the power supplied to a heating element. In the absence of knowledge of the underlying process, a PID controller has historically been considered to be the best controller.[2] By tuning the three parameters in the PID controller algorithm, the controller can provide control action designed for specific process requirements. The response of the controller can be described in terms of the responsiveness of the controller to an error, the degree to which the controller overshoots the setpoint, and the degree of system oscillation. Note that the use of the PID algorithm for control does not guarantee optimal control of the system or system stability. Some applications may require using only one or two actions to provide the appropriate system control. This is achieved by setting the other parameters to zero. A PID controller will be called a PI, PD, P or I controller in the absence of the respective control actions. PI controllers are fairly common, since derivative action is sensitive to measurement noise, whereas the absence of an integral term may prevent the system from reaching its target value due to the control action.

West 4700+ Limit Controller

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The 4700+ limit controller is a member of the P series family. The instrument provides a latched relay output which is activated when process value either exceeds or falls below the a pre-set limit level, providing a fail-safe cut off which has to then be reset before the process can continue. The LED indication shows when limits have been exceeded and when the relay is latched out. With a full range of universal sensor input options the 4700+ provides a valuable control 'watchdog' for most systems.

General Info

In boiler operation, usually a device, electrically controlled, that shuts down a burner at a prescribed operating point. In machine-tool operation, a sensing device which terminates motion of the workpiece or tool at prescribed points.

West Pro-EC44 Dual Loop Temperature Controller

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The Pro-EC44 dual temperature controller has been designed to simplify user operation through an intuitive HMI combined with easy-to-use configuration and simulation software, Blue Control©. This allows the controller to be used by a variety of personnel without compromising the functionality available. Quick access to important product information is also facilitated with a front USB port. The Pro-EC44 controller is well suited to challenging applications such as: Plastics, Extrusion & Rubber, Industrial Ovens & Furnaces, Laboratory and Test Equipment, Environmental Chambers, Boiler & Steam Processes, Food & Beverage, Packaging.

General Info

One distinctive advantage of PID controllers is that two PID controllers can be used together to yield better dynamic performance. This is called cascaded PID control. In cascade control there are two PIDs arranged with one PID controlling the setpoint of another. A PID controller acts as outer loop controller, which controls the primary physical parameter, such as fluid level or velocity. The other controller acts as inner loop controller, which reads the output of outer loop controller as setpoint, usually controlling a more rapid changing parameter, flowrate or acceleration. It can be mathematically proven[citation needed] that the working frequency of the controller is increased and the time constant of the object is reduced by using cascaded PID controllers. For example, a temperature-controlled circulating bath has two PID controllers in cascade, each with its own thermocouple temperature sensor. The outer controller controls the temperature of the water using a thermocouple located far from the heater where it accurately reads the temperature of the bulk of the water. The error term of this PID controller is the difference between the desired bath temperature and measured temperature. Instead of controlling the heater directly, the outer PID controller sets a heater temperature goal for the inner PID controller. The inner PID controller controls the temperature of the heater using a thermocouple attached to the heater. The inner controller's error term is the difference between this heater temperature setpoint and the measured temperature of the heater. Its output controls the actual heater to stay near this setpoint. The proportional, integral and differential terms of the two controllers will be very different. The outer PID controller has a long time constant – all the water in the tank needs to heat up or cool down. The inner loop responds much more quickly. Each controller can be tuned to match the physics of the system it controls – heat transfer and thermal mass of the whole tank or of just the heater – giving better total response.

West Pro-EC44 Dual Loop Temperature Controller

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The Pro-EC44 dual temperature controller has been designed to simplify user operation through an intuitive HMI combined with easy-to-use configuration and simulation software, Blue Control©. This allows the controller to be used by a variety of personnel without compromising the functionality available. Quick access to important product information is also facilitated with a front USB port. The Pro-EC44 controller is well suited to challenging applications such as: Plastics, Extrusion & Rubber, Industrial Ovens & Furnaces, Laboratory and Test Equipment, Environmental Chambers, Boiler & Steam Processes, Food & Beverage, Packaging.

General Info

A Profile Controller is Process Controller for controlling process parameters against time. Users can define the profile they want with the help of an extensive instruction set. Units support instructions like jump, loop, loop with count apart from ramp and soak control. Auxiliary relays are provided which can be used to operate external controls like valve or hooter etc. Relay On and Off instructions are supported. Units are available with control algorithm as On / Off, Proportional, PI or PID to choose from depending on process requirement.

Precision Digital Trident Digital Process and Temperature Panel Meter

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The Model PD765 Trident digital panel meter is one of the most versatile digital panel meters on the market and will satisfy a wide variety of process applications. The Trident can be field programmed to accept process voltage (0-5V, 1-5V, etc) and current (4-20 mA) inputs, 100 Ohm RTDs, and the four most common thermocouples. It is housed in a shallow-depth, 1/8 DIN enclosure that features a NEMA 4X front panel and convenient mounting hardware. There are two power options for the Trident: 85 to 265 VAC or 12-36 VDC and it can provide 24 VDC to power the transmitter if needed. Programming and setup can be performed with the four front panel pushbuttons, free MeterView software, or using the Copy function.

General Info

A device providing specific information on the state or condition of something.

PD6262 ProVu Analog Input Flow Rate/Totalizer

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Precision Digital has added a few more products to this powerful line of 1/8 DIN meters. The PD6060 has two independently programmed process input channels with powerful math functions. The PD6262 and PD6363 ProVu meters are multipurpose, easy to use digital dual analog/pulse input flow rate/totalizers specifically designed for displaying flow rate and total from flowmeters with analog or pulse outputs. Rate, Total, and Grand Total for Each Input Channel Addition, Difference, Average, Multiplication, Division, Min, Max, Weighted Average, Ratio, Concentration Available with Universal 85-265 VAC or 12/24 VDC Input Power On-Board Digital Input 2 or 4 Relays + Isolated 4-20 mA Output Options

General Info

Flow rate/totalizers can be programmed for a wide variety of totalizer applications. Each input channel has a total, grand total, or non-resettable grand total with a time base of seconds, minutes, hours or days. The user can program a totalizer conversion factor for each channel, a non-resettable grand total, password protection, and several total reset methods.

Precision Digital ProtEX Series Explosion Proof Meters

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The ProtEX Series of explosion-proof meters brings modern design, easy readability, and enhanced functionality to hazardous areas around the world. These explosion-proof displays and controllers have worldwide hazardous area approvals including FM, CSA, ATEX, and IECEX. They are built with custom, modern, and smooth, die-cast aluminum enclosures; and many come with Safe-Touch through-glass buttons that make it possible to program the meters without having to remove the cover. The built-in mounting flanges, multiple conduit holes, and rotatable display make it easy to install and set up in the field wherever operators need a information-packed, easy to read display. The ProtEX Series features large a variety of display options; from the dual-line LED, full-featured ProtEX-MAX PD8 to the information-packed loop-powered or battery-powered LCD models. All ProtEX models are designed for wide-angle viewing angles and varied lighting conditions. The NEMA 4X IP68 explosion-proof aluminum enclosure provides serious protection from the elements, impact, and corrosion. The world-wide full product approvals means they can be installed virtually anywhere. The ProtEX series has a solution for almost any process application including flow display and metering, batch control, level indication, temperature monitoring, Modbus® scanners, and more.

General Info

Explosion-proof meters bring modern design, easy readability, and enhanced functionality to hazardous areas around the world. These explosion-proof displays and controllers have worldwide hazardous area approvals including FM, CSA, ATEX, and IECEX. They are built with custom, modern, and smooth, die-cast aluminum enclosures; and many come with Safe-Touch through-glass buttons that make it possible to program the meters without having to remove the cover. The built-in mounting flanges, multiple conduit holes, and rotatable display make it easy to install and set up in the field wherever operators need a information-packed, easy to read display.

MDI Hockey Puck Relays

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The industrial, 1-phase relay with antiparallel thyristor output is the most widely used industrial SSR due to its multiple application possibilities. The relay can be used for resistive, inductive and capacitive loads. The zero switching relay switches ON when the sinusoidal curve crosses zero and switches OFF when the current crosses zero. The instant-on relay with DC control input can be used for phase control. The builtin varistor secures transient protection for the heavy industrial applications, and the LED indicates the status of the control input. The clipon cover is securing touch protection to IP 20. Protected output terminals can handle cables up to 16mm².

General Info

A solid-state relay (SSR) is an electronic switching device in which a small control signal controls a larger load current or voltage. It consists of a sensor which responds to an appropriate input (control signal), a solid-state electronic switching device which switches power to the load circuitry, and some coupling mechanism to enable the control signal to activate this switch without mechanical parts. The relay may be designed to switch either AC or DC to the load. It serves the same function as an electromechanical relay, but has no moving parts.

Control Concepts 1020

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The control card is powered off of the 4/20mA loop, so no control transformer is required. Compact and economical. Fast cycling distributive control improves heater life and reduces temperature variations. 2500 Vac RMS isolation between input/output and line voltage/heatsink. Natural convection.

General Info

A silicon-controlled rectifier (or semiconductor-controlled rectifier) is a four-layer solid-state current controlling device. Some sources define silicon controlled rectifiers and thyristors as synonymous, other sources define silicon controlled rectifiers as a subset of a larger family of devices with at least four layers of alternating N and P-type material, this entire family being referred to as thyristors. SCRs are unidirectional devices (i.e. can conduct current only in one direction) as opposed to TRIACs which are bidirectional (i.e. current can flow through them in either direction). SCRs can be triggered normally only by currents going into the gate as opposed to TRIACs which can be triggered normally by either a positive or a negative current applied to its gate electrode.

IPAQ-H Universal High-performance Profibus-PA Transmitters

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Thanks to the digital output PROFIPAQ-H offers very accurate measurements as well as sensor and process information. With five input terminals new features such as two redundant Pt100 in 3-wire connection, are included. Configuration from a PC with Inor software, ProfiSoft, or over the Profibus network. Connection of local LCD-indicator. Communication with 8 acyclic masters.

General Info

Electrical isolation breaks the galvanic path between the input and output signal. That is, there is no physical wiring between the input and output. The input is normally transferred to the output by converting it to an optical or magnetic signal then it is reconstructed on the output. By breaking the galvanic path between input and output, unwanted signals on the input line are prevented from passing through to the output. Isolation is required when a measurement must be made on a surface with a voltage potential far above ground. Isolation is also used to prevent ground loops.

IsoPAQ-32P Isolation Signal Splitter with Double Outputs for mA and V Signals

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The Isolation Signal Splitter IsoPAQ-32P is used for isolation and conversion of 0-20 mA, 4-20 mA, 0-5 V and 0-10 V standard signals. The input signal and the two output signals can be selected in any combination. The signal combination is decided by the Part No. The high accuracy and reliability and the Protective Separation are further features, which ensure a safe system operation.

General Info

A temperature transmitter is an electrical instrument that interfaces a temperature sensor (e.g. thermocouple, RTD, or thermistor) to a measurement or control device (e.g. PLC, DCS, PC, loop controller, data logger, display, recorder, etc.). Typically, temperature transmitters isolate, amplify, filter noise, linearize, and convert the input signal from the sensor then send (transmit) a standardized output signal to the control device. Common electrical output signals used in manufacturing plants are 4-20mA or 0-10V DC ranges. For example, 4mA could represent 0°C and 20mA means 100°C.

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