BARNSTEAD THERMOLYNE CORPORATION MEL-TEMP 3.0 OPERATING INSTRUCTIONS Model No. 1401 1402 LT1186X4 5/1/00
Table of Contents Safety Information...3 Alert Signals...3 Intended Use...3 General Usage...3 Warnings...3 General Specifications...4 Declaration of Conformity...5 Environmental Conditions...5 Installation...6 Capillary Selection...6 Capillary Guard Installation...6 Operation...7 Performing a Melting Point Determination...7 General Maintenance...10 General Cleaning Instructions...10 Calibration...10 Removing Broken Capillaries...14 Lamp Replacement...15 Replacing Fuses...16 Replacement Parts...17 Ordering Procedures...18 One Year Limited Warranty...19 2
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. Intended Use Your MEL-TEMP 3.0 has been designed with function, reliability and safety in mind. It is your responsibility to install it in conformance with local electrical codes. For safe operation, please pay attention to the alert signals throughout the manual. General Usage Do not use this product for any purpose other than its intended usage. Note Notes alert you to pertinent facts and conditions. Hot Surface Hot surfaces alert you to the possibility of personal injury if you come in contact with a surface during use or for a period of time after use. Warnings To avoid personal injury: 1. Refer servicing to qualified personnel. 2. Do not use in the presence of flammable or combustible materials; fire or explosion may result. This device contains components which may ignite such materials. To avoid electrical shock: 1. Do not allow unit to become wet. 2. Use a properly grounded electrical outlet of correct voltage and current handling capacity. 3. If power cord becomes damaged, replace immediately. 4. Disconnect from power supply before servicing. 3
General Specifications Temperature range: ambient to 400 C Temperature sensor: platinum RTD Temperature accuracy: ±0.5 C from 20-200 C ± 1 from 200-400 C with factory calibration. User may calibrate to 0.1 C accuracy at a specific temperature using a melting point standard or calibration bath. Temperature resolution: 0.1 C Uniformity: ±.38 @ 250 C ±.44 @ 400 C Total System Accuracy: ±.88 @ 250 C ± 1.44 @ 400 C Ramping rate: selectable from 0.1 C/min - 10.0 C/min in 0.1 C/min increments Reproducibility: 0.2 C Heat up time, 24 C to 250 C: 24 min 24 C to 400 C: 40 min Cool down time, 400 C to 200 C: 2.5 min 400 C to 100 C: 5 min Capacity: accepts 1 to 3 capillaries simultaneously Memory: stores two temperatures Precision melting point capillaries: 1.55 mm outside diameter x 90 mm long Dimensions: 11.7 L x 15.5 W x 31 H cm Shipping Weight: 2.4 kg Electrical Requirements: 200 watts, 100-120 VAC or 200 watts, 210-250 VAC 4
GENERAL SPECIFICATIONS Declaration of Conformity Barnstead Thermolyne hereby declares under its sole responsibility that this product conforms with the technical requirements of the following standards (230 volt models only): EMC: EN 61000-3-2 Limits for Harmonic Current Emissions EN 61000-3-3 Limits for Voltage Fluctuations and Flicker EN 61326-1 Electrical Equipment for Measurement, Control, and Laboratory Use; Part I: General Requirements Safety: EN 61010-1 EN 61010-2-010 Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use; Part I: General Requirements Part II: Particular Requirements for Laboratory Equipment for the Heating of Materials per the provisions of the Low Voltage Directive 73/23/EEC, as amended by 93/68/EEC. The authorized representative located within the European Community is: Electrothermal Engineering, Ltd. 419 Sutton Road Southend On Sea Essex SS2 5PH United Kingdom Copies of the Declaration of Conformity are available upon request. Environmental Conditions Operating: 17 C - 27 C; 20% - 80% relative humidity, non-condensing. Installation Category II (over-voltage) in accordance with IEC 664. Pollution Degree 2 in accordance with IEC 664. Storage: Altitude limit: 2,000 meters. -25 C - 65 C; 10% to 85% relative humidity. 5
Installation Plug MEL-TEMP 3.0 into a grounded wall receptacle using the supplied power cord. The voltage and power required for your MEL-TEMP 3.0 is marked on the label at the rear of the unit. Note Replacement capillaries may be purchased directly from Barnstead Thermolyne. See Replacement Parts list. Capillary Selection Your MEL-TEMP 3.0 includes a vial of Barnstead Thermolyne s precision melting point capillaries. They were specifically developed to fit the MEL-TEMP 3.0 and will provide the most uniform and repeatable results. Never force a capillary into the MEL-TEMP 3.0. Once a capillary is inserted into the large diameter portion of the capillary hole. Capillary Guard Installation Attach the capillary guard to the top of the unit using the 2 black thumb screws supplied with the guard. The large hole goes over the capillary opening in the top of the case. 6
Operation Switch the power ON. The upper display, marked ACTUAL, indicates the temperature of the capillary chamber. The lower display reads the previously selected start temperature. The START C LED (Light Emitting Diode) is lit to identify the meaning and units of data displayed in the lower display. The capillary chamber will heat or cool to the start temperature. Whenever the heater or fan is on, the corresponding LED on the control panel will light. Performing a Melting Point Determination Set Test Parameters 1. Press [SET]. Use the UP and DOWN ARROW to select Start (start temperature). 2. Repeat for End (end temperature) and rate (heating rate). 3. Press [SET ] to exit the set mode. 7
OPERATION Perform Test 1. Insert charged capillaries when the Insert Capillaries indicator flashes and 3 audible beeps sound. The capillary openings are visible directly below the 1/2 inch round hole in the top of the instrument. They are also visible by looking through the viewing glass about an inch behind, and just above, the inner lens. Note that it is not necessary to wait for the flashing Insert Capillaries light before inserting charged capillaries. The light and audible beeps assure you that the oven temperature has not changed more than 0.5 C for at least two minutes. You can start your test any time before or after you hear the three beeps or notice the flashing Insert Capillaries light. 2. Press [RAMP/COOL] to begin ramping. You can change the ramp rate any time while you are ramping by pressing the UP or DOWN ARROW key. 3. Press [STO/RCL] to store the onset of the melting range in MEM1. Two audible beeps will sound and Store will briefly be displayed, ensuring that the data has been stored. 8 4. Press [STO/RCL] to store end of melting range in MEM2. Two audible beeps will sound and Store will briefly be displayed, ensuring that the data has been stored.
OPERATION 5. Press [RAMP/COOL] to cool oven back to Start. the fan will run until the start temperature is reached. 6. The Insert Capillaries indicator will flash and 3 audible alarms will sound when the unit is ready for the next test. Recall Results You can recall previously stored temperatures any time that the instrument is not ramping. 1. Press [STO/RCL] to recall MEM1. The MEM1 light will illuminate. Repeat for MEM2. 2. Press [STO/RCL] or wait 60 seconds to exit the recall mode. 9
General Maintenance General Cleaning Instructions Wipe exterior surfaces with a lightly dampened cloth containing a mild soap solution. Calibration Your MEL-TEMP 3.0 has been factory calibrated at room temperature with a NIST traceable thermometer to ±0.2 C. If necessary you may easily confirm and/or change the instrument s calibration. The MEL-TEMP 3.0 may be calibrated three different ways: 10 Method 1 - Calibration with a Melting Point Standard: Determine the melting range of a melting point standard with your MEL-TEMP 3.0 in the following manner: 1. For the greatest accuracy, be sure to use the same heating rate that you usually use for melting range determinations. If there is any temperature difference between the melting range that you have just determined and the range printed on the melting point standard s container, write it down clearly. 2. Press and hold the UP and DOWN ARROW keys simultaneously for about five seconds. Release both keys when the lower display reads CAL1. Then press the UP or DOWN ARROW key to adjust CAL1. This will shift the temperature display readings. For example, if the temperature display read 0.5 C too low when the melting point standard was tested, then increase CAL1 by 0.5. This process calibrates the unit to the melting point standard.
GENERAL MAINTENANCE 3. Press the [STO/RCL] key, or wait sixty seconds to save the new calibration offset and exit the calibration mode. Method 2 - Using a Calibration Bath: 1. Remove any capillaries from the instrument. 2. Press the [SET] key. Then use the DOWN ARROW key to set Start (start temperature) to 0.0 C. 3. Press the [SET] key three times so that the unit displays the current block temperature in the upper display and 0.0 C in the lower display. The fan will turn on. 4. Wait until the upper display reads 50.0 C or cooler before continuing with this procedure. 5. Remove the black thumbscrews from the right and left side of the unit and lift off the cover. 6. Grasp the vertical portion of the temperature probe just above the metal block (that the capillaries fit into) and gently pull the probe up while simultaneously lifting the black grommet and white temperature probe cable up and out of the sheet metal piece that the fan is attached to. Be careful not to bend the probe or pull too hard on the probe s cable - it may be damaged if it is not handled gently. 11
GENERAL MAINTENANCE 7. Place the tip of the probe into the calibration bath. We recommend an immersion depth of 1.2 inches, which is the same amount of the probe that is heated in the block. If more reach is needed, gently pull the probe s cable out of the lower box. It can extend to approximately 15 inches. 8. Record any temperature difference between the calibration bath s thermometer and the MEL-TEMP 3.0 s upper display. 9. Press and hold the UP and DOWN keys simultaneously for about five seconds. Release both keys when the lower display reads CAL1. Then press the UP or DOWN ARROW key to adjust CAL1. This will shift the temperature display readings. For example, if the temperature display reads 0.5 C lower than the calibration bath s reference thermometer, then increase CAL1 by 0.5. This process calibrates the unit to the bath s reference thermometer. 10. Press the [STO/RCL] key, or wait sixty seconds to save the new calibration offset and exit the calibration mode. 11. Reassemble the instrument. 12
GENERAL MAINTENANCE Method 3 - Using a Reference Thermocouple and Electronic Thermometer 1. Allow the MEL-TEMP 3.0 to stabilize a few degrees below the calibration temperature you require. 2. Insert a fine thermocouple into a 3-5mm column of magnesia or alumina in a melting point capillary. 3. Insert the capillary and thermocouple into one of the capillary holes. 4. Begin ramping. For the greatest accuracy, be sure to use the same heating rate that you usually use for melting range determinations. 5. When the reference thermometer reads the desired calibration temperature, record the temperature difference between the electronic reference thermometer and the MEL-TEMP 3.0 s upper display. 6. Press and hold the UP and DOWN ARROW keys simultaneously for about five seconds. Release both keys when the lower display reads CAL1. Then press the UP or DOWN ARROW key to adjust CAL1. This will shift the temperature display readings. For example, if the temperature display reads 0.5 C lower than the thermocouple s reference thermometer, then increase CAL1 by 0.5. This process calibrates the unit to the reference thermometer. 13
GENERAL MAINTENANCE 7. Press the [STO/RCL] key, or wait sixty seconds to save the new calibration offset and exit the calibration mode. Reassemble the instrument. The calibration changes you made are stored in non-volatile memory and will be saved even when your MEL-TEMP 3.0 is turned off. Removing Broken Capillaries Broken capillaries are removed from the instrument in the following manner: 1. If the unit is hot, set the start temperature to 40.0 C or lower and allow the fan to run. 2. When the fan turns off, switch off the main power switch and unplug the power cord from the wall. 3. Remove the thumbscrews at the right and left side of the unit and lift off the housing cover. 4. Remove the lens with an ordinary pair of internal, snap-ring pliers. Pliers with a 0.038 inch straight tip work nicely. 5. With the lens removed, hold the unit upside down and shake the capillary fragments into a suitable waste container. 6. Replace the lens (flat side in), snap ring, housing cover and thumbscrews. You may separate the aluminum branched tube (the cast metal part that holds the lens) from the heat block. The socket head screws can be removed with a 5/64 ball-driver. 14
GENERAL MAINTENANCE Replacement lamps may be purchased directly from Barnstead Thermolyne. (See Replacement Parts list). Lamp Replacement 1. If the unit is hot, set the start temperature to 40.0 C or lower and allow the fan to run. 2. When the fan turns off, switch off the main power switch and unplug the power cord from the wall. 2. Remove the thumbscrews at the right and left side of the unit and lift off the housing cover. 3. The light shield (which is marked caution unit hot is held in place with a multi-pronged retaining spring. To remove the light shield, pull straight up with moderate force. If necessary, rock the light shield back and forth slightly while pulling. 4. To remove the burned out bulb, gently push it towards the socket and rotate it approximately 30 degrees counterclockwise. 5. Replace the lamp with a new one and reinstall the light shield, housing cover and thumbscrews. 15
GENERAL MAINTENANCE Replacement fuses may be purchased directly from Barnstead Thermolyne. (See Replacement Parts list). Replacing Fuses 1. Unplug your MEL-TEMP 3.0 before replacing fuses. 2. MEL-TEMP 3.0 has two fuses located in the power entry module (the same part that the power cord plugs into). To replace these fuses, remove the fuse drawer by squeezing the tabs with your fingertips in the direction indicated by the arrows on the drawer. 3. Substitute new fuses for the blown fuses in the drawer, then push the drawer back into the power entry module. Both sides of the drawer should click into position. 16
Replacement Parts Part No. Description FZX59 2-1A, fast-acting, 5X20 mm fuses in the power entry module (protects entire unit) - 115 Volt units FZX74 2-0.5A, fast-acting, 5X20 mm fuses in the power entry module (protects entire unit) - 230 Volt units 1403 100/vial - Precision capillaries EL1186X1 Element,120V FA1186X1 Fan, 120V LMX21 Bulb, 120V CN1151X1 Controller FS1151X1 Black Thumbscrews AYX19 Capillary Guard RS1151X1 RTD EL1186X2 Element, 240V FA1186X2 Fan, 240V LMX20 Bulb, 240V SQ1151X1 Buzzer SWX185 Switch CRX96 Cord,120V CRX70 Cord, 240V 17
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 Thermolyne 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. If the dealer cannot handle your request, then contact our Customer Service Department at 319-556-2241 or 800-553-0039. Prior to returning any materials to Barnstead Thermolyne Corp., please contact our Customer Service Department for a Return Goods Authorization number (RGA). Material Returned without an RGA number will be returned. 18
One Year Limited Warranty Barnstead Thermolyne Corporation warrants that if a product manufactured by Barnstead Thermolyne and sold by it within the continental United States or Canada proves to be defective in material or construction, it will provide you, without charge, for a period of ninety (90) days, the labor, and a period of one (1) year, the parts, necessary to remedy any such defect. Outside the continental United States and Canada, the warranty provides, for one (1) year, the parts necessary to remedy any such defect. The warranty period shall commence either six (6) months following the date the product is sold by Barnstead Thermolyne or on the date it is purchased by the original retail consumer, whichever date occurs first. All warranty inspections and repairs must be performed by and parts obtained from an authorized Barnstead Thermolyne dealer or Barnstead Thermolyne (at its own discretion). Heating elements, however, because of their susceptibility to overheating and contamination, must be returned to our factory, and if, upon inspection, it is concluded that failure is not due to excessive high temperature or contamination, warranty replacement will be provided by Barnstead Thermolyne. The name of the authorized Barnstead Thermolyne dealer nearest you may be obtained by calling 1-800-446-6060 (319-556-2241) or writing to: Barnstead Thermolyne P.O. Box 797 2555 Kerper Boulevard Dubuque, IA 52004-0797 USA FAX: (319) 589-0516 E-MAIL ADDRESS: mkt@barnstead.com Barnstead Thermolyne s sole obligation with respect to its product shall be to repair or (at its own discretion) replace the product. Under no circumstances shall it be liable for incidental or consequential damage. THE WARRANTY STATED HEREIN IS THE SOLE WARRANTY APPLICABLE TO Barnstead Thermolyne PRODUCTS. Barnstead Thermolyne EXPRESSLY DISCLAIMS ANY AND ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WAR- RANTIES OF MERCHANTABILITY OR FITNESS FOR USE. 19
Barnstead Thermolyne 2555 Kerper Blvd. P.O. Box 797 Dubuque, IA 52004-2241 Phone: 319-556-2241 800-553-0039 Fax: 319-589-0516 E-Mail Address: mkt@barnstead.com ISO 9001 REGISTERED