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Controls


Control options available for our furnaces

PROGRAM CONTROLS, POWER CONTROLS, ALARMS, THERMOCOUPLES, RECORDERS, WIRING OPTIONS



INFORMATION

SINGLE SET POINT CONTROLS

HONEYWELL UDC 2300 AND UDC 3300 DIGITAL SINGLE SET POINT CONTROLLERS
The UDC 2000 features accuracy of .30% of span. The UDC 3000 features include accuracy of 0.20% of span. Both have dual vacuum fluorescent displays and keyboard selectable inputs. The UDC 3000 has a deviation bargraph, two sets of PID constants and single ramp. A toll free number for service and instructions is provided by Honeywell. Next day replacement service is offered for warranty problems. This is the preferred control for a heavy production environment. Autotune is available as an option.

OTHER SINGLE SET POINT CONTROLS
Temperature controls from all major manufactures are available through L&L. Barber Colman, Honeywell, Research Inc., Partlow, LFE, Eurotherm and West are among the major companies used. Customers who have service agreements with specific manufactures or who have standardized on particular control models may want to specify a control manufacturer.

COMMUNICATIONS
Most controls can be ordered with RS422 or RS232 communications.

PROGRAM CONTROLS

HONEYWELL UDC 3300 PROGRAMMER
Honeywell UDC 3000 microprocessor based digital program control. There is one program with six soaks and six ramps. Can be used as a delay timer as well. Display includes English language programming information for easy set up. This is one of the easiest digital program controls to operate. Accuracy is .25% of scale. All PID tuning constants, maximum temperature and scale range are programmable. Various levels of security lockout can be programmed into the control to prevent unauthorized changes. Thermocouple burnout protection is included.

YOKAGAWA UP30 & UP40 MULTI-PROGRAM CONTROLS
The Yokagawa UP30 multi-program temperature controller features 19 separate programs (up to 200 segments), self tuning, graphic vacuum florescent display and +/-0.15% accuracy. The UP40 features up to 99 programs with up to 400 segments total.

PROGRAMMABLE UMC 800 TEMPERATURE CONTROL
Honeywell UMC 800 microprocessor based digital Universal Multiloop Controller. There are up to 1000 segments of setpoint programming divided up in various programs. Color operator interface allows you to see various screens with alarms, function switches, loops and trends. All furnace logic is programmed within this control. All PID tuning constants, maximum temperature and scale range are programmable. Various levels of security lockout can be programmed into the control to prevent unauthorized changes. Thermocouple burnout protection is included. Datalogging is included on a floppy disk.

PROGRAMMABLE HC 900 TEMPERATURE CONTROL WITH DATA ARCHIVING SOFTWARE
Honeywell HC 900 microprocessor based digital Hybrid Controller. There can be up to 99 profiles, each with up to 50 segments. Color operator interface (Model 559)allows you to see various screens with alarms, function switches, loops and trends. All furnace logic is programmed within this control. All PID tuning constants, maximum temperature and scale range are programmable. Various levels of security lockout can be programmed into the control to prevent unauthorized changes. Thermocouple burnout protection is included. Includes Ethernet 10BaseT communications. Datalogging is included on a floppy disk.

PROGRAMMABLE DCP200 TEMPERATURE CONTROL WITH UP TO 19 PROGRAMS
Honeywell DCP200 microprocessor based digital program control. 1/4 DIN size. Up to 19 programs with up to 20 segments per program with an overall maximum of 380 segments and 600 auxiliary settings. Accuracy is .2% of scale. All PID tuning constants, maximum temperature and scale range are programmable. Various levels of security lockout can be programmed into the control to prevent unauthorized changes. Thermocouple burnout protection is included.

PROGRAMMABLE DCP100 TEMPERATURE CONTROL WITH UP TO 8 PROGRAMS
Honeywell DCP100 microprocessor based digital program control. 1/4 DIN size. Up to 8 programs with up to 16 segments per program. An overall maximum of 121 consecutive segments can be programmed into one profile by linking programs. Accuracy is .25% of scale. All PID tuning constants, maximum temperature and scale range are programmable. Various levels of security lockout can be programmed into the control to prevent unauthorized changes. Thermocouple burnout protection is included. Real time clock allows program to start at a certain predetermined time on a certain day. Software is available for PC’s to configure and download profiles from a computer.

OTHER PROGRAM CONTROLS
A wide range of program controls from Honeywell, West, Research, Inc., Barber Colman, Eurotherm, as well as other manufactures, are available.

PROCESS AND SAFETY ALARMS

EVENT/PROCESS ALARM
An alarm field configurable as either a temperature based alarm or a time based event on a program control rings a buzzer. Includes silencer.

AUDIBLE AND/OR VISUAL ALARM
An audible buzzer or loud bell as well as a flashing light can be wired into the overtemperature alarm or any other alarm condition. Includes silencer.

SPECIAL ALARMS
All kinds of special alarms can be wired into the furnace. For instance, a special alarm could shut down the furnace if the fan didn’t turn. These are all by special quote.

POWER CONTROLS

ZERO FIRED SCR POWER CONTROL
A zero fired SCR power control with two-leg control is used instead of contactors. This is constructed with transient voltage protection, sub-cycle fuse protection, extra large heat sinks, and positive zero firing. Gain and bias adjustments are included for tuning.

SOLID STATE CONTACTORS
Power control can be a series of solid state SSR type contactors. These are quiet, have a long life and can be operated with a fast cycle time for even temperature control. They work like mercury contactors (on a relay output from the control) but have no mercury and are environmentally safe.

PHASE ANGLE FIRED SCR
Phase angle fired SCR power controls are generally used in non-metallic element furnaces (silicon carbide and molybdenum disilicide) These furnaces are usually equipped with step down transformers to provide a limited maximum voltage to the element circuit. Phase angle SCRs equipped with current limiting are required in these furnaces so that the proper voltage can be applied without excessive amperes. The phase angle fired SCR is utilized to vary the voltage during the heating and cooling cycle to minimize operator supervision.

AMMETER/VOLTMETER
A digital ammeter/voltmeter combination made by Yokagawa is useful for monitoring amps and volts. System includes a selector switch to allow operator to switch between each leg of each phase. This is important for determining element condition and when t o change voltage taps in silicon carbide element furnaces. It can also be used to determine if an element has burned out in any furnace for uniformity purposes.

TEMPERATURE RECORDERS

DR450T DIGITAL ROUND CHART RECORDER
Model DR 450T Honeywell Digital Circular Chart Recorder with two digital displays (one of actual temperature reading) and digital keyboard programming. 0.1% of span accuracy (typically better than ±1°F). The recorder prints its own charts. This allows complete configuration of charts scale and speed. You can focus on a small segment of temperature or look at the whole range and easily change back and forth without changing paper. No need for preprinted paper. 10" round chart. Microprocessor based. Chart Speeds of 8 hours, 24 hours, 7 days or "x" hours from 1 to 744. Programmable in Degrees F or C. Input filter included. Up to four pens.

HONEYWELL DPR 3000 DIGITAL STRIP CHART
Recorder can have up to 32 inputs. 250 mm (9.84”) chart width. Completely programmable inputs, ranges, zones, messages (20 messages up to 30 characters.) Accepts most thermocouple and RTD inputs. Six assignable colors. Sample rate of once every 5 seconds . Configuration in English. Alphanumeric display. Prints in tabular and/or trend mode (numbers or lines.) Accuracy up to 0.1%. Chart speeds programmable from .4 inches/hour to 196 inches/hour. Fan fold or roll paper. Optional communications, math pack, extra inputs and logic boards can be added later.

HONEYWELL DPR 1000 100 MM STRIP CHART
Provides analog tracing and digital printing with a single printing mechanism. Multi-color (up to six pens.) Includes printing buffer so that no data is lost. Non-volatile memory without battery. 0.25% accuracy. Programmable speed and range configuration . High noise immunity. Up to 12 messages and 12 alarms. Annotates scale.

THERMOCOUPLES

SHEATHED THERMOCOUPLES
Thermocouples sheathed in either inconel alloy, alumina or mullite are often quoted. These help protect the thermocouple from oxidation or other contamination from the furnace atmosphere. They include cast aluminum heads and NPT fittings.

TYPE R, TYPE S AND TYPE B THERMOCOUPLES
Precious metal Type R or S thermocouples are recommended when the furnace will be operated above 2000F for long periods of time. They are standard on some furnaces and optional on others. Type B are used for ultra-high temperatures.

FLEXIBLE TYPE K THERMOCOUPLES
A Type K thermocouple is made of high purity, 20 gauge calibrated thermocouple wire, insulated with ceramic fiber and protected with overbraided inconel wire. This allows the user to monitor the precise temperature of the work piece. Maximum continuous temperature is 1800F.; 2100F. intermittent.

THERMOCOUPLE BUNDLE ACCESS HOLE
A capped alloy NPT fitting, generally 1” in diameter can be provided for easy periodic temperature survey of the furnace.

WIRING OPTIONS

NEMA 12 PANEL WITH FUSED DISCONNECT
This adds the following items to the furnace: The control panel is a dust tight NEMA 12 panel with a hinged gasketed door. A flange mounted power disconnect switch (normally Allen Bradley) is used on the control panel. Percentage timer controls replace normal bi-metal zone switches (if part of system.) All external switches and pilot lights are NEMA 13. The furnace power and control wiring system is manufactured according to J.I.C. Electrical Standard EGB-1-67. The control system equipment meets or exceeds U.L. 508, twelfth edition, and ANSI/NEMA Standard No. ICS 1-1978. J.I.C. stands for “Joint Industrial Council.”

SPECIAL WIRING CODES
L&L can wire to special company codes and specifications. See specific quote. Send complete special electrical specifications.


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