High Temperature Muffle Furnace OPERATION MANUAL AND PARTS LIST Model Numbers F46110CM F46110CM-33 F46118CM F46120CM F46120CM-33 F46128CM F46120CM-75 F46120CM-33-75 F46128CM-75 F46230CM F46230CM-33 F46238CM F46240CM F46240CM-33 F46248CM F46240CM-75 F46240CM-33-75 F46248CM-75 8 Segment 8 Segment 8 Segment 4 Program 4 Program 4 Program 20 Program 20 Program 20 Program LT1141X1 • 12/21/05 1
Table of Contents Safety Information ..................................................................................................................................................................3 Alert Signals ....................................................................................................................................................................3 Warnings...........................................................................................................................
Safety Information Alert Signals Warning Warnings alert you to a possibility of personal injury. Caution Cautions alert you to a possibility of damage to the equipment. Note Notes alert you to pertinent facts and conditions. Hot Surface Hot surfaces alert you to a possibility of personal injury if you come in contact with a surface during use or for a period of time after use. This manual contains important operating and safety information.
SAFETY INFORMATION 7. To AVOID BURNS, do not stand directly in front of the chamber without wearing a heat resistant face shield, gloves and apron. 8. To AVOID FIRE, do not place combustible materials where exposed to heat from open door. 9. Caution: Hot Surface. Avoid Contact. Please note the following WARNINGS: Warning Refer servicing to qualified personnel.
General Description Intended Use Types 461 and 462 are general purpose laboratory furnaces intended for applications requiring temperatures from 800-1700 degrees C. General Usage Do not use this product for anything other than its intended usage. Principles of Operation The chamber section is heated by six (in type F46100 furnaces) or eight (in type F46200 furnaces) Super Kanthal 33 heating elements suspended in a chamber made of alumina and silica high temperature refractory fiber.
GENERAL DESCRIPTION The contactor removes electricity from the heating elements if the furnace temperature equals or exceeds the high limit setpoint of the controller or when the door is opened. The circuit breaker is used to turn the furnace on and off and also protects the electrical supply in the event that the furnace draws too much electrical current. The pilot light indicates that the circuit breaker is ON and that the controller is being supplied with electricity.
GENERAL DESCRIPTION Typical Profile for Programmable Models. (Other Profiles May Be Formed.
General Specifications Model# F46110CM, F46110CM-33 F46118 F46120CM F46120CM,-33 F46128 F46120CM-75 F46120CM-33-75 F46128CM-75 Width 28-1/8 (71.4) 28-1/8 (71.4) 28-1/8 (71.4) 28-1/8 (71.4) 28-1/8 (71.4) 28-1/8 (71.4) Height 18-1/2 (47) 18-1/2 (47) 18-1/2 (47) 18-1/2 (47) 18-1/2 (47) 18-1/2 (47) Depth 19 (48.3 19 (48.3) 19 (48.3) 19 (48.3) 19 (48.3 19 (48.3) Width 6 (15.2) 6 (15.2) 6 (15.2) 6 (15.2) 6 (15.2) 6 (15.2) Height 6-1/2 (16.5) 6-1/2 (16.5) 6-1/2 (16.
GENERAL SPECIFICATIONS Model# F46230CM, F46230CM-33 F46238 F46240CM F46240CM,-33 F46248 F46240CM-75 F46240CM-33-75 F46248CM-75 Width 34-1/8 (86.7) 34-1/8 (86.7) 34-1/8 (86.7) 34-1/8 (86.7) 34-1/8 (86.7) 34-1/8 (86.7) Height 22-1/2 (57.2) 22-1/2 (57.2) 22-1/2 (57.2) 22-1/2 (57.2) 22-1/2 (57.2) 22-1/2 (57.2) Depth 23 (58.4) 23 (58.4) 23 (58.4) 23 (58.4) 23 (58.4) 23 (58.4) Width 10 (25.4) 10 (25.4) 10 (25.4) 10 (25.4) 10 (25.4) 10 (25.4) Height 10 (25.4) 10 (25.
GENERAL SPECIFICATIONS Environmental Conditions Operating: 17°C-27°C; 20% to 80% relative humidity, non-condensing. Installation Category II (overvoltage) in accordance with IEC 664. Pollution Degree 2 in accordance with IEC 664. Altitude limit: 2,000 meters. Storage: -25°C to 65°C; 20% to 80% relative humidity.
Unpacking Visually check for any physical damage to the shipping container. Inspect the equipment surfaces that are adjacent to any damaged area. Open the furnace door and remove packing material from inside the furnace chamber. Vacuum the chamber prior to use to remove the insulation dust due to shipment. A hearth plate is supplied with the furnace to be placed on bottom of furnace chamber. Retain the original packaging material if reshipment is foreseen or required.
Installation Note The type 41600 and 46200 furnaces do not come with an electrical cord because current requirements are too great to be handled by ordinary electrical cords and standard wall electrical outlets. Site Selection Install furnace on a sturdy surface and allow space for ventilation. The electrical specifications are located on the specification plate on the back of the furnace. Consult Barnstead International if your electrical service is different than those listed on the specification plate.
General Operation of Furnace Observe the following warnings before operating your furnace. To avoid electrical shock, this furnace must: 1. Be installed by a competent, qualified electrician who insures compatibility among furnace specifications, electrical source and grounding code requirements. 2. Always be disconnected from the electrical supply prior to maintenance and servicing. To avoid personal injury: 1.
GENERAL OPERATION OF FURNACE Caution Remember that when the power switch is “ON,” the furnace will begin to heat to the setpoint temperature that was previously set in the controller. Power Switch Controls power to the furnace. Switch to the “ON” position to energize the elements and the controller. Cycle Indicator (OP1) The amber cycle light will illuminate when electricity is being supplied to the elements.
GENERAL OPERATION OF FURNACE Accessing Controller Parameters To enter the main list of controller parameters, press and release the PAGE button until you reach the desired parameter. To scroll through the desired parameter, press and release the SCROLL button. within the main list, press and release the SCROLL button. To quickly advance between parameters, hold the PAGE or SCROLL button down.
Operation 8 Segment, 4-Program and 20-Program Models Buttons and Indicators OP1 (Output 1): illuminates when the heating output of the temperature controller is on. AUTO/MAN (Auto/Manual Mode): when the controller is in the automatic mode the output automatically adjusts to keep the temperature or process value at the setpoint. The “AUTO” light will illuminate. The manual mode has been disabled through factory configuration. Call Customer Service for further information.
OPERATION Controller Parameters Home Display °C: measured temperature in Celsius. Temperature units can not be changed without entering the configuration. Contact Customer Service if a different temperature unit is required. OP: % output power demand; displayed in lower display (cannot be changed). C.id: Controller identification number. PrG: Program number (displayed when a program is running. IdHi: Deviation High Alarm tunE: One-shot autotune enable.
OPERATION FASt: Fast run through program (no/YES). The controller will default to “no.” out.n: Even output states (OFF/ON), only used on multi-program models. SYnc: Synchronization (no/YES), only used on multi-program models. SEG.d: Flash active segment type in the lower display of the home display (no/YES). The controller will default to “no.” ProG LiSt (Program Edit List) PrG.n: Press the UP or DOWN ARROW to select the program number (program number will be displayed in lower display).
OPERATION used with tYPE include; tGt target setpoint), Rate (rate of temperature increase) and dur (time to target setpoint or time to dwell). End.t: End of program. AL LiSt (Alarm List) IdHi: Deviation High Alarm. Atun LiSt: (Autotune List) tunE: One-shot autotune enable. drA: Adaptive tune enable. drA.t: Adaptive tune trigger level in display units. Range = 1 to 9999. Pid LiSt G.
OPERATION Alarms The controller will flash an alarm message in the home display if an alarm condition is detected. FSL: PV full scale low alarm. FSH: PV full scale high alarm. dEv: PV deviation band alarm. ldHi: PV deviation high alarm. ldLo: PV deviation low alarm. LCr: load current load alarm. HCr: load current high alarm. S.br: Sensor break: check that sensor is connected correctly. L.br: Check that the heating circuits are working properly. Ld.
OPERATION Basic Operation Note The controller will return to the HOME display if left idle for more than a few seconds. Note Once the desired parameter has been selected, depressing either the UP or DOWN button will cause the parameter to be replaced with the new value. Any further use of the UP or DOWN buttons will change the parameter value. In all cases, the value shown on the display is the current working value of that parameter.
OPERATION to these parameters when the program is in the hold state but permanent changes must be made in the reset state. Follow the steps below to create or edit a program. 1. Press the PAGE button until you reach the program list (ProG LiSt). 2. Press the SCROLL button until display reads, “PrG.n.” 3. Press the UP or DOWN button to select a number for a new program or to edit an existing program. Holdback Holdback consists of a value and a type.
OPERATION To set the holdback type: 1. Press the PAGE button until you reach the program list (ProG LiSt). 2. Press the SCROLL button until display reads, “Hb.” 3. Press the UP or DOWN button to toggle between “bAnd, Hi, Lo and OFF.” Holdback Value To set the holdback value: 1. Press the PAGE button until you reach the program list (ProG LiSt). 2. Press the SCROLL button until display reads, “Hb.U.” 3. Press the UP or DOWN button to enter a holdback value.
OPERATION Setting the Number of Cycles Set the number of times a group of segments or programs are to be repeated by following the steps listed below. 1. Press the PAGE button until you reach the program list (ProG LiSt). 2. Press the SCROLL button until display reads,”CYC.n.” 3. Press the UP or DOWN button to select the number of cycles you want to run; or, press the DOWN button to select “cont.” so the program will run continuously.
OPERATION 4. Press the SCROLL button until display reads “Hb.” 5. Press the UP or DOWN button to toggle between “bAnd, Hi, Lo and OFF.” 6. Press the SCROLL button until display reads, “tGt.” 7. Press the UP or DOWN button to set a target setpoint. 8. Press the SCROLL button until display reads,”rAtE.” 9. Press the UP or DOWN button to select a value in ramp units (seconds, minutes or hours; set in the “rmP.U” parameter). rmP.t To ramp to a specified temperature at at set time: 1.
OPERATION 3. Press the UP or DOWN button until display reads, “dwEll.” 4. Press the SCROLL button until display reads, “dur.” 5. Press the UP or DOWN button to select a time in dwell units (seconds, minutes or hours; set in the “dwL.U” parameter). StEP To climb instantaneously from the current temperature to a specified temperature. 1. Press the PAGE button until you reach the program list (ProG LiSt). 2. Press the SCROLL button until display reads, tYPE.” 3.
OPERATION 4. Press the SCROLL button until display reads, “PrG.n.” 5. Press the UP or DOWN button to select a program number to be linked. 6. Press the SCROLL button until display reads, “CYC.n.” 7. Press the UP or DOWN button to select the number of cycles the linked program is to be run. End To end or repeat a program: 1. Press the PAGE button until you reach the program list (ProG LiSt). Caution Minimize operation of furnace under 800°C.
OPERATION Running a Program 1. Press the PAGE button until you reach the run list (run LiSt). 2. Press the SCROLL button until display reads, “PrG.” 3. Press the UP or DOWN button to select the program number you want to run. 4. Press the RUN/HOLD button once to start the program. (The RUN light will illuminate.) Holding a Program To put a running program on hold, press the RUN/HOLD button. (The HOLD light will illuminate.
OPERATION Note The B thermocouple will not read accurately below 250°C. The G.SP gain schedule Setpoint) is factory set at 1210°C. If tuning within 200°C above or below the G.SP. you must adjust your G.SP value up or down to maintain at least a 200°C span between the G.SP and the SP. Setting the Transfer Point Note To stop the tuning function, simultaneously press the PAGE and SCROLL buttons. If gain scheduling has been enabled, “G.SP will appear at the top of the PID list.
OPERATION 6. Simultaneously press the PAGE and SCROLL buttons to return to the HOME DISPLAY. The display will flash “tunE” while tuning is in progress. Adaptive Tuning Adaptive tuning continuously evaluates tuning parameters. Adaptive tuning automatically installs new values if better accuracy is possible. Adaptive tuning should be used when the characteristics of a process change due to load or setpoint changes or, in a process that can not handle the oscillation caused by a one-shot tune.
Furnace Loading During tuning, the lower display flashes between “tunE” and the setpoint temperature. The setpoint temperature can be changed during tuning by pressing the UP or DOWN buttons. The lower display will continue to flash until the tuning is completed. Be sure to use care in loading and unloading the furnace chamber. Molybdenum disilicide heating elements are extremely fragile and can crack or break with just a slight bump.
Preventive Maintenance Warning Warning To avoid electrical shock, this furnace must always be disconnected from the electrical supply prior to maintenance and servicing. Refer servicing to qualified personnel. This warning is presented for compliance with California Proposition 65 and other regulatory agencies and only applies to the insulation in this product.
PREVENTIVE MAINTENANCE the insulation, or other materials you have placed in the chamber. In many instances this reaction is detrimental to operation. 2. Clean exterior surfaces with lightly dampened cloth containing mild soap solution 3. Occasionally check the electrical connections in the control section. Repeated heating and cooling can cause terminals to loosen. 4. The type B thermocouple used in this furnace is matched to the temperature controller.
Troubleshooting PROBLEM POSSIBLE CAUSES CORRECTIVE ACTION Inaccurate temperatures. Contaminated thermocouple. Replace thermocouple. Repeated element burnout. Continuous operation below 800°C. Do not continuously operate below 800°C. Contact Barnstead International. Heating element contamination. “OR” displayed. Open thermocouple. Replace thermocouple. Slow heatup. Operating 240V furnace on 208V supply. Increase voltage to proper level. Furnace chamber overloaded. Lighten load.
Maintenance and Servicing Warning To avoid electrical shock, this furnace must always be disconnected from the electrical supply prior to maintenance and servicing. Do not clean clean furnace without proper eye protection. Refer servicing to qualified personnel. Warning This warning is presented for compliance with California Proposition 65 and other regulatory agencies and only applies to the insulation in this product.
MAINTENANCE AND SERVICING Caution To avoid breakage of a replacement heating element, be sure that the slot into which the replacement heating element slides is free of all debris so that the element goes in very easily. Forcing an element into a slot, however slightly, can result in its breakage. 36 To replace a heating element (refer to Fig. 1A): 1. Remove top cover from heating chamber side of furnace. 2. Remove the clips holding the connector cable (4) to the defective heating element.
MAINTENANCE AND SERVICING (if not, reposition element ceramic holder). Carefully wrap the connector cable around the element ends; fasten with clips. Replace top cover. To replace thermocouple: 1. Remove top cover from the heating chamber side of furnace. 2. Loosen diagonal screw holding ceramic connection block. 3. Lift connection block. 4. Loosen connection block screws holding thermocouple; noting which side of block the side of the thermocouple with the colored bead is connected to. 5.
HR1 T1 HR2 ...
HR2 - JF 3D 6 JE 3C 5 JD 3B + 7 I LIMIT 3 HR5 V- V+ VI AC AB AA LC LB LA N L RED BLACK HR6 CN2 TC1 HR7 DS1 CB1 HR8 M1 M2 CB1 CN1 CN2 DS1 FL1 HR1 to HR8 M1 M2 M3 RY1 SW1 T1 TC1 PART NO. FUSE AND HOLDER ARE SUPPLIED WITH CURRENT CONTROLLER.
Replacement Parts Warning Replace fuses with the same type and rating.
Ordering Procedures Please refer to the Specification Plate for the complete model number, serial number, and series number when requesting service, replacement parts or in any correspondence concerning this unit. All parts listed herein may be ordered from the Barnstead International dealer from whom you purchased this unit or can be obtained promptly from the factory. When service or replacement parts are needed we ask that you check first with your dealer.
One Year Limited Warranty Barnstead International (“BARNSTEAD”) warrants that if a product manufactured by Barnstead shall be free of defects in materials and workmanship for one (1) year from the first to occur of (i) the date the product is sold by BARNSTEAD or (ii) the date the product is purchased by the original retail customer (the “Commencement Date”).
