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Summary of Contents for Thermo Scientific 6253
- Page 1 Thermo Scientific Programmable Vacuum Oven Operating Manual 107568 (7006253 Rev. 3) Visit us online to register your warranty www.thermoscientific.com/warranty...
- Page 2 Preface Models covered in this manual Catalog numbers Model numbers Voltage 3628A 6253 115V 3628A-1 6254 230V MANUAL NUMBER 107568 (7006253) ECNM-000078 8/02/18 Included correct vacuum in the temperature uniformity specification on page 1-2 28670 6/13/12 Update factory set heater runaway safety setting to 325°C, ±12° on pg 3-4...
- Page 3 Thermo Fisher Scientific makes no representations or warranties with respect to this manual. In no event shall Thermo be held liable for any damages, direct or incidental, arising out of or related to the use of this manual. ©2018 Thermo Fisher Scientific. All rights reserved. Programmable Vacuum Oven Thermo Scientific...
- Page 4 Always use the proper protective equipment (clothing, gloves, goggles, etc.) Always dissipate extreme cold or heat and wear protective clothing. Always follow good hygiene practices. Each individual is responsible for his or her own safety. Thermo Scientific Programmable Vacuum Oven...
- Page 5 We can also provide you with a quotation on our Extended Warranty for your Thermo Scientific products. Whatever Thermo Scientific products you need or use, we will be happy to discuss your applications. If you are experiencing technical problems, working together, we will help you locate the problem and, chances are, correct it yourself...over the telephone without a service...
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Page 6: Table Of Contents
Sample Program .........6-2 Thermo Scientific... - Page 7 Ordering Procedures ........10-2 Programmable Vacuum Oven Thermo Scientific...
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Page 8: Introduction
Introduction Section 1 The Thermo Scientific Programmable Vacuum Oven is designed to operate with reduced pressures and/or with inert atmospheres. As such, it is equipped with separate vacuum and gas ports - each with its own control valve. Additionally, a special digital readout display indicates time of day, chamber temperature, pressure and schedules for programmed oven operation. -
Page 9: Specifications
Chamber Size ..12”W x 18”D x 12”H Chamber Volume ....1.5 cu. ft. Programmable Vacuum Oven Thermo Scientific... -
Page 10: Unpacking
If any of these items are missing from the carton, contact Technical Services. Before operating the vacuum oven, the user should ensure that all packing material has been removed from the interior of the chamber. Thermo Scientific Programmable Vacuum Oven... -
Page 12: Led Indicators
Hg: Indicates chamber pressure is being displayed in the lower display window. Also illuminated during vacuum pump program step. Heater: Indicates heater activation. Pump: Indicates closed vacuum pump contact condition. Program: Indicates 7-day program setup or operation. Thermo Scientific Programmable Vacuum Oven... -
Page 13: Controls, Indicators And Connectors
1/4-inch (inside diameter) hose. Vacuum Inlet Port: A serrated hose fitting used to connect an auxiliary vacuum pump to the oven. Fitting accepts a 1/4-inch (inside diameter) hose. Programmable Vacuum Oven Thermo Scientific... - Page 14 Warning Secured access panels, covers, etc., should only be removed from this equipment by trained service personnel. Hazardous voltages are present at various internally exposed points. Display Thermocouple Input Control Thermocouple Input Calibration jumper (JP4) shown in calibration mode. Battery Module Figure 3-2. Control Board Thermo Scientific Programmable Vacuum Oven...
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Page 15: Self-Diagnostic Safety Monitors
If the set point is at 270°C or below, the temperature display will show OVR at every other temperature display update. In either case, Technical Services should be contacted to check the heater circuit. Programmable Vacuum Oven Thermo Scientific... -
Page 16: Installation And Assembly
When using a tank atmosphere, a 1/4” tube to 1/4” pipe adapter is required for the regulator outlet of the tank. This adapter is not supplied. A Swagelok B-400-7-4 adapter, or equivalent, may be used. Also, 9/16”, and 1-1/8” open-end or, preferably, flare-nut wrenches are required. Thermo Scientific Programmable Vacuum Oven... - Page 17 At this point, check all connections for leaks, using an ordinary soapy water solution. 9. Check data plate and plug line cord into a suitable power receptacle. Programmable Vacuum Oven Thermo Scientific...
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Page 18: Operation
TSET Displays flashing day or time of day Set clock and day of the week PRGM Displays program mode Start/Stop program mode PSET Displays day, step and set-point Program 7 – Day event timer Thermo Scientific Programmable Vacuum Oven... - Page 19 Press MENU until ADJP is dis- pressure offset. (Range ±8.0 inHg) ADJP played, then press SET. value is added to pressure display. Press SET or wait 2 seconds Unit returns to the default menu. Default Programmable Vacuum Oven Thermo Scientific...
- Page 20 PRGM is displayed. the display to OFF. If the program menu was set ON, the program will Press SET or wait 2 execute. If it was set to OFF, the control returns to Default seconds default mode. Thermo Scientific Programmable Vacuum Oven...
- Page 21 Keep in mind, the heat rate cannot be adjusted, and the time to reach a certain temperature should be noted before programming. A two hour time span is usually adequate for the oven to reach most temperatures. Programmable Vacuum Oven Thermo Scientific...
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Page 22: Establishing Operating Conditions
Panel Screws (6) Tab 4 Purge Port Tab 3 Vacuum Port Hole Plug 240VAC Pump (max) Figure 5-1. Accessing Pump Contacts Thermo Scientific Programmable Vacuum Oven... -
Page 23: Setting The Temperature
SET key to enter the value. Return to the default mode by continuously pressing MENU or leave as is for two seconds and control will revert to the default mode automatically. Programmable Vacuum Oven Thermo Scientific... -
Page 24: Operation In A Vacuum Environment
3. Make sure the purge valve is closed (full CW) and the vacuum valve is open (full CCW). 4. Activate the vacuum pumping system. 5. The vacuum, in inches-of-mercury, can be read on the TEMP/ VACUUM Display. A steady decrease in chamber pressure ensures the door is sealed. Thermo Scientific Programmable Vacuum Oven... -
Page 25: Setting The Time And Day
Finally, days of the week can also be adjusted by pressing the UP/ DOWN arrow keys. Press the SET key again to enter the day of the week. For additional information on the menus, see Tables 5-1 through 5-8. Programmable Vacuum Oven Thermo Scientific... -
Page 26: Programming The Oven
UP/DOWN arrow key to advance the menu to the next day and continue programming. Note The program week begins on Monday and ends on Sunday. That means whatever is programmed on Monday can be copied through to Sunday. Thermo Scientific Programmable Vacuum Oven... -
Page 27: Program Execution Enabling/Disabling
PRGM. Press the DOWN arrow key to display OFF, then press SET or wait 2 seconds for the program to stop automatically, with the temperature set to the last value encountered during the program execution. Programmable Vacuum Oven Thermo Scientific... - Page 28 Section 6 Programming the Oven Table 6-1. Sample Program Array ° 0 ° 0 ° 0 ° 0 ° 0 ° 0 Thermo Scientific Programmable Vacuum Oven...
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Page 30: Calibration Procedures
4. Plug the power cord in and switch on the power switch. The upper display will show INIT, which is the first calibration menu. By pressing the MENU key repeatedly, all calibration menus can be viewed in the upper display. Table 5-7 summarizes the calibration menus. Thermo Scientific Programmable Vacuum Oven... -
Page 31: Init - Initialize Memory
Finally, with the desired data type displayed in the lower display, press the SET key again to reset the data to the factory set values. The lower display will show CLR indicating the data has been cleared. Programmable Vacuum Oven Thermo Scientific... -
Page 32: Vcmc - Vacuum Calibration
Generally, the pressure value measured should fall within the 29 to 30 inches-of-mercury range. In fact, measurements outside this range should be suspect. Thermo Scientific Programmable Vacuum Oven... -
Page 33: Vcmc - Vacuum Calibration (Cont.)
2. Connect a suitable vacuum pump to the PURGE port along with a vacuum gauge (Figure 7-2). 3. Press the SET key to enable vacuum calibration. The upper display will show PRSR with the AM LED flashing. The lower display will indicate 29.0 in. Hg. Programmable Vacuum Oven Thermo Scientific... - Page 34 12. Open the VACUUM valve (rotate counterclockwise) and allow air to bleed into the chamber. 13. Verify the atmospheric pressure is shown in the lower display. Repeat the procedure if necessary by pressing the MENU key until the upper display again reads VCMC. Thermo Scientific Programmable Vacuum Oven...
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Page 35: Cjcd-Cold Junction Compensation Display
SET key again to conclude the calibration. The next menu to appear in the upper display is the INIT menu. Remove the jumper at JP4 to return to normal operating mode (see Step #5 under Calibration Mode). Programmable Vacuum Oven Thermo Scientific... -
Page 36: Seal Replacement
2. Apply a thin bead of Dow Corning RTV-736 red silicone rubber adhesive to the edge of the chamber. 3. Install gasket and close door. 4. Keep door closed for a minimum of 16 hours with 1-2 inches of vacuum before using. Thermo Scientific Programmable Vacuum Oven... -
Page 37: Door Alignment Procedure
Close vacuum valve at approximately 25 in. of Hg. 7. Tighten the two bolts for each hinge while lightly pressing each corner of the door in the area of the hinge being tightened. Programmable Vacuum Oven Thermo Scientific... - Page 38 5. Clearance between end of cam should be no more than 1/16 of an inch. If greater than 1/16 inch, loosen bracket and shift as needed. Recheck alignment. Handle (apply Loctite to threads) 1/16” Orient Clearance flat as shown Door Handle Configuration Thermo Scientific Programmable Vacuum Oven...
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Page 40: Service
To use this chart effectively, select the Symptom category(s) that best describes the observable malfunction, in particular the error codes. Proceed to the Probable Cause description(s) and take the necessary Corrective Action. Thermo Scientific Programmable Vacuum Oven... - Page 41 Internal tygon tubing between inlet port and vacuum sensor Reconnect tubing, replace if necessary. disconnected or leaking. Door improperly aligned. Realign door following instruction given in this manual. Programmable Vacuum Oven Thermo Scientific...
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Page 42: Replacement Parts
Heater (HTR1, HTR2) LL50098 Triac (Q1) LL LL52563 Thermostat LL52018 Control Thermocouple (TC1) LL52025 Readout Thermocouple (TC2) 255036 Seal Replacement Kit LL70435 Shelf LL52002 Valve (Vacuum or Purge) LL44342 Handle LL02335 LL02371 Hose Connector LL52062 Thermo Scientific Programmable Vacuum Oven 10-1... -
Page 43: Ordering Procedures
All parts listed herein may be ordered from the Thermo Scientific dealer from whom you purchased this unit or can be obtained promptly from the factory. - Page 44 Section 10 Replacement Parts 120V Schematic Figure 8: 2 30V Schem atic 230V Schematic Thermo Scientific Programmable Vacuum Oven 10-3...
- Page 45 Thermo Scientific 401 Millcreek Road Marietta, Ohio 45750 United States www.thermofisher.com...
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