SMO14-2 SMO28-2
Contents
1. reaching 00 00 a To resume manual heating place the Timer Switch in the OFF Set Timer O position Or OCDE Profile Complete b To launch another profile press the Reset button and enter a new profile or allow the previous profile to reset automatically after 5 seconds End of procedure USER MAINTENANCE Warning Prior to maintenance or service on this unit disconnect the power feed from the power supply Avertissement Avant d effectuer toute maintenance ou entretien de cet appareil d brancher le cordon secteur de la source d alimentation CLEANING AND DISINFECTING lf a hazardous material or substance has spilled in the oven immediately initiate your site s Hazardous Material Spill Containment protocol Contact your local Site Safety Officer and follow instructions per the site policy and procedures The unit should be cleaned prior to first use Do not use spray on cleaners or disinfectants These can leak through openings and coat electrical components Do not use cleaners or disinfectants that contain solvents capable of harming paint coatings or stainless steel surfaces Do not use chlorine based bleaches or abrasives these will damage the chamber liner T Warning Never clean the oven with alcohol or flammable cleaners Avertissement Ne jamais nettoyer l appareil l alcool ou avec des nettoyants inflammables Cleaning Perform the steps below to clean the oven 1 Remove all2. removable interior components shelves and accessories 2 Clean the oven with a mild soap and water solution including all corners Do not use an abrasive cleaner that will damage stainless steel surfaces Do not use deionized water to rinse or clean with 3 Rinse with distilled water and wipe dry with a soft cloth 4 Take special care when cleaning around the Main Temperature Control and Over Temperature Limit sensor probes at the back of the chamber to prevent damage Disinfecting Cary out the following steps to disinfect the oven if required by your laboratory or production protocol 1 Turn the unit off Carry out your disinfection protocol 2 If allowed by your protocol remove all shelving Disinfect all corners Take special care not to damage the temperature sensor probes when disinfecting 3 Disinfect the unit using commercially available disinfectants that are non corrosive non abrasive and suitable for use on stainless steel surfaces Contact your Site Safety Officer for detailed information on the disinfectants compatible with your study or production protocol LAB 29 Page Wait 1 Hour MAINTENANCE CONTINUED CALIBRATING THE TEMPERATURE DISPLAY Note Performing a temperature display calibration requires a suitable temperature sensor reference device Please see the Temperature Reference Device entry on page 5 for the device requirements Temperature calibrations are performed to ensu
3. SMO Forced Air Ovens 230 Voltage SHELI Installation anq Operation Manual SMO14 2 SMO28 2 SMO28G 2 Previously Designated FX14 2 FX28 2 SMO Forced Air Ovens 230 Voltage Previously Designated FX Forced Air Ovens Installation and Operation Manual Part Number Manual 4861581 Revision June 3 2015 Pictured on Cover SMO14 2 and SMO28 2 Note The SMO28G 2 ships with two wire shelves typically used in curing applications The SMO28G 2 is identical to the SMO28 2 in all other respects These units are T V CUE listed as forced air ovens for professional industrial or educational use where the preparation or testing of materials is done at an ambient air pressure range of 22 14 31 3 inHg 75 106 kPa and no flammable volatile or combustible materials are being heated These units have been tested to the following requirements CAN CSA C22 2 No 61010 1 2012 CAN CSA C22 2 No 61010 2 010 R 2009 UL 61010A 2 010 2002 UL 61010 1 2012 EN 61010 1 2010 EN 61010 2 010 2003 LAB TABLE OF CONTENTS INTRODUC TION alii 4 General Safety Considerations inserer 4 Engineering Improvements iii 5 Cna OT Tle 5 Temperature Reference Sensor Device iii 5 RECENINGYOUBUNIT LL iaia 6 ISDC TASSI DI eil aa 6 OR access Sale bee marae eens foes ee ee tee A 7 Recording Data Plate Information e ss eee eee e eee eee 10 INSTALLATION clinici EE rale iii
4. aporation rates after the heated portion of an application is complete Opening the dampener vents while the oven is running may speed the rate of material drying dependent on the nature of your application However running the oven with the dampeners open introduces cool air into the chamber while allowing heated air to exit This may impact the temperature uniformity and stability of the chamber and lower the operational temperature ceiling SIL AR 19 Page OPERATION CONTINUED Timed Heating Profile The oven is provided with a Timer subsystem that can run the oven in a steady state heating profile at the current temperature set point from 1 minute in length up to 99 hours 59 minutes The oven still requires time to come to temperature when running a heating profile Launching a profile with the temperature set point set to 150 C immediately after turning on the oven will result in the first 24 minutes of the profile being spent with the chamber rising from room temperature to 150 C When the Timer system is on the oven will not heat unless a profile is running The Over Temperature Limit System OTL When set the OTL heating cutoff system prevents runaway heating in the event of a failure of the microprocessor controller or its thermometer probe The OTL operates independenily of the microprocessor and is provided with a separate hydrostatic temperature sensor probe located in the oven chamber In the event the temperature
5. are for First Use Burn In page 21 b Set the Oven Temperature Set Point page 22 c Burn in page 23 d Set the Oven Temperature Set Point page 22 e Verify Temperature Accuracy Optional page 23 f Set the Over Temperature Limit page 28 This time set the temperature to that of your application PREPARE FOR FIRST USE BURN IN If the oven is being run for the first time out of the box perform the 3 steps below followed by the Burn In procedure to burn off the protective oil coating from the oven heating element This prevents smoking during normal operations above 150 C 1 Open both dampener vents all the way 2 Positively vent the oven exhaust outside of its workspace environment during the Burn In Procedure The procedure will produce light smoking 3 Use the Set the Temperature Set Point procedure on the next page to set the oven to run at 200C 21 Page LAB OPERATION CONTINUED SET THE OVEN TEMPERATURE SET POINT Adjust the oven temperature set point to that of your application If preparing to perform the first use burn in procedure set the oven to 200 C Set Temperature Note The oven should come from the factory with the OTL dial set to max 1 Turn the Over Temperature Limit OTL control dial clockwise to the maximum position indicated by the largest dot if not already set to max a This prevents the Over Temperature Limit system from interfering with this procedure as well as the first us
6. at while the Timer system is on unless a profile is running Over Temperature Limit Control OTL This graduated dial sets the temperature limit for the Over Temperature Limit system The OTL is an independent mechanical heating cutoff that prevents unchecked heating of the oven in the event of a failure of the main temperature controller system For more details please see the explanation of the Over Temperature Limit System on page 20 in the Theory of Operation entry OTL Light Marked OVER TEMP ACTIVATED this light illuminates whenever the OTL System is routing power away from the heating elements Under normal operating conditions this light should never illuminate Timer Display and Control Pad The SET TIMER display can show the duration of the currently programed heating profile or a flashing duration adjustment mode or the countdown of a running profile to 0 The RESET button is used to place the Timer display in its adjustable duration mode and then to scroll through the duration time parameters The black SET TIMER arrow buttons adjust the heating profile duration time parameters when the display is in its blinking adjustment mode The T START STOP timer button launches a heating profile or pauses a running profile 8000 ewe L 16 Page LAB CONTROL PANEL OVERVIEW Main Temperature Display and Control Marked SET TEMPERATURE this display shows the current oven chamber air temperature ac
7. ata plate for individual electrical specifications Technical data specified applies to units with standard equipment at an ambient temperature of 25 C and a voltage fluctuation of 10 The temperatures specified are determined in accordance to factory standard following DIN 12880 respecting the recommended wall clearances of 10 of the height width and depth of the inner chamber All indications are average values typical for units produced in the series We reserve the right to alter technical specifications at all times WEIGHT Model Shipping Net Weight SMO14 2 360lbs 163kgs 280lbs 127kgs SMO28 2 495lbs 225kgs 390lbs 177kgs SMO28G 2 495lbs 225kgs 390lbs 177kgs By Inches Model Exterior W x D x H Interior W x D x H SMO14 2 37 5 x 34 x 48 inches 30 8 x 24 8 x 31 inches SMO28 2 37 5 x 35 x 78 3 inches 30 8 x 25 x 62 inches SMO28G 2 37 5 x 35 x 78 3 inches 30 8 x 25 x 62 inches By centimeters Model Exterior W x D xH Interior W x D x H SMO14 2 95 x 86 x 121 cm 78 x 63 x 79 cm SMO28 2 95 3 x 88 9 x 198 8 cm 78 1 x 63 5 x 157 4 cm SMO28G 2 95 3 x 88 9 x 198 8 cm 78 1 x 63 5 x 157 4 cm Cubic Feet Liters 34 Page UNIT SPECIFICATIONS CONTINUED Model Per Shelf Total SMO14 2 75lbs 34kg 225lbs 102kg SMO28 2 75lbs 34kg 450lbs 204kg SMO28G 2 30lbs 13 6kg 60lbs 27 2kg 30lbs with the weight evenly distributed across the shelf Uniformity S
8. ation After the chamber has stabilized a wait of 15 minutes without a change of 0 1 C should suffice for it re stabilize after brief disruptions such as short door openings Both dampeners must be fully closed during the verification procedure and the proceeding warmup Failure to do so will result in an inaccurate temperature reading AN Figure 7 Dampener Closed Continued on next page 23 Page LAB OPERATION CONTINUED Verifying the Temperature Display Accuracy 1 Place the temperature sensor of the reference device inside the oven as close as possible to the geometric center of the chamber a Probes may be introduced through the chamber door space and the door closed over probe wires Note thermocouple sensor probe sleeve may be taped to the shelving as long as the exposed copper end is 2 inches 5cm away from the shelf An exposed sensor probe in direct contact with the shelving may experience heat sinking which can result in an inaccurate temperature reading 2 Allowthe chamber temperature to re stabilize if the chamber door has been opened during the past 15 minutes a The reference device temperature reading should not change by 0 1 C for at least 15 minutes after a significant disruption for the oven to be considered re stabilized Wait 15 Minutes Reference Device 3 Once the chamber temperature has stabilized compare the reference 1 G nor device and the oven display temperature readi
9. ay temperature readings l L i UL a Ifthe readings are the same or the difference between the two falls within the acceptable range of your protocol the oven is calibrated for temperature Set Temperature b The Temperature Calibration procedure is complete v Reference Device 13 If the two readings still fall outside your protocol s acceptable range i ar repeat 8 12 j L U E a Ifthe temperature readings of the oven and the reference device fall outside your protocol after three calibration Set Temperature attempts contact Technical Support or your distributor for assistance End of procedure 32 Page MAINTENANCE CONTINUED IPONENTS Periodically inspect the door latch trim and catch for alignment Check the two silicon rubber gaskets located on the door and on the doorframe of the oven body for signs of drying brittleness or cracking Failure to maintain the integrity of the door system shortens the lifespan of the oven and may adversely impact chamber temperature uniformity and stability Replacement of the door liner and chamber liner gaskets is a service level procedure ELECTRICAL COMPONENTS Electrical components do not require maintenance If the unit electrical systems fail to operate as specified please contact your distributor or Technical Support for assistance 33 Page LAB UNIT SPECIFICATIONS These ovens are 230 voltage units Please refer to the oven d
10. by a qualified electrical technician All other steps can be performed by the end user This oven is intended for use indoors at room temperatures between 15 C and 40 C 59 F and 104 F at no greater than 80 Relative Humidity at 25 C 77 F Allow a minimum of 12 inches 30cm between the oven and any walls or partitions as well as 12 inches 30cm of vertical headspace clearance above the top of the oven for unobstructed airflow and cooling Operating the unit outside of these conditions may adversely affect its temperature range and stability For conditions outside of those listed above please contact your distributor to explore other oven options suited to your laboratory or production environment LOCATION When selecting a location to install the oven consider all environmental conditions that can impact the temperature range uniformity and stability of the unit For example e Other ovens autoclaves and any device that produces significant radiant heat e Heating and cooling ducts or other sources of fast moving air currents e High traffic areas e Direct sunlight POWER SOURCE REQUIREMENTS When selecting a location for the oven check that each of the following requirements are satisfied e The oven must be positioned so that all operators have access to the power feed disconnect in case of emergencies o The Disconnect must be in close proximity to the equipment and within easy reach of the operator o The Di
11. curate to within 0 1 C The display can also show an adjustable temperature set point in the displays set point mode as well as an adjustable offset while in calibration mode mode and then enter a calibration offset value Heating Activated Light The green pilot light located beneath the label HEATING ACTIVATED illuminates whenever the workspace oven heating elements are powered and warming the oven The oven uses measured pulses to achieve and maintain the temperature set point The arrow buttons can be used to adjust the temperature set point or place the unit in its calibration Y LAB 17 Page OPERATION OPERATING PRECAUTIONS Warning The SMO oven is not an explosion proof unit The oven is not designed to safely contain combustible gasses Do not place explosive combustible or flammable materials into the chamber A 1 The bottom surface of the chamber should not be used as a work surface 2 Do not operate the oven in an environment with noxious fumes 3 The SMO oven is provided with dampered intake and exhaust vents For safe and efficient oven operation follow these precautions a In normal heating the dampers are closed b Outgassed byproducts maybe hazardous to or noxious for operating personal If either is the case oven exhaust should be positively ventilated to a location outside workspace in accordance with national and local regulations 4 Do not place sealed or filled containers in
12. e If 5 seconds elapse with no activity on the Arrow Pad buttons the O Y 3 Use the Up or the Down arrow key to adjust the Hour parameter to setting of 0 to 99 4 Press the Reset button to advance to the Tens of Minutes parameter a The flashing decimal point will advance to between the third and fourth numbers b Advancing automatically saves the entered Hour parameter Procedure continued on next page 26 Page Set Timer 1 Minute Profile Set Timer 1 Hour 1 Minute Set Timer LAB OPERATION CONTINUED Set Timer Duration Continued 5 Use the Up or the Down arrow key to adjust the Tens of Minutes OR Y parameter 6 Press the Reset button to advance to the Single Minutes parameter a The flashing decimal point will advance to the right of the fourth numeral b Advancing automatically saves the entered Hour parameter parameter A 7 Use the Up or the Down arrow key to adjust the Single Minutes 8 Waitfor 5 seconds after entering the Single Minutes parameter 07 a The display will exit adjustment mode b The Single Minutes parameter along with the previous two Wait 5 Seconds parameter values are now saved End of procedure DRYING RACKS AND OTHER ACCESSORIES Set Timer 1 Hour 51 Minutes Set Timer 1 Hour 55 Minutes Set Timer Make sure that any accessories used inside the oven chamber such as drying racks are suitable for your application and will not suffer da
13. e burn in Press and release either of the Set Temperature arrows to activate the temperature set point adjustment mode Set Temperature a The temperature display will briefly flash the letters SP to indicate the Set Point is about to be displayed b The Set Temperature digital display will then show the flashing adjustable temperature set point Set Temperature Use the Up or the Down arrow key to adjust the set point P New Set Point Note The display will automatically exit the adjustment mode after 5 seconds of inactivity with the last shown set point value saved Set Temperature Wait 5 seconds after entering the set point The display will stop flashing and the set point is now saved in FEL the controller on The oven will now automatically heat or passively cool to match your set point O The display will revert to showing the current chamber air temperature Heating to Set Point Wait 5 Seconds See the Setting the Over Temperature Limit procedure on page 25 for how to set the OTL heating cutoff system once the oven has stabilized at your application temperature set point Leave the OTL dial set its maximum clockwise position if you are preparing to run the Burn In procedure End of Procedure 22 Page LAB OPERATION CONTINUED BURN IN 1 Once the oven chamber has reached 200 C allow it to run for a minimum of 1 hour Wait 1 Hour 2 Continue to run the oven at 200 C if it is st
14. e calibration mode Set Temperature a Press and hold both the UP and DOWN arrow buttons simultaneously b The Temperature Display will show the letters CO then begin flashing the current temperature value Set Temperature 9 Use the Up or Down arrows to adjust the current temperature value until it matches the reference device temperature reading P a If an arrow key is not pressed for five seconds the Temperature Display will cease flashing and store the last displayed value as the new current chamber temperature or value f L D L Reference Device Procedure continued on next page LAB 31 Page MAINTENANCE CONTINUED Calibrating the Temperature Display Continued Set Temperature 10 After entering the correction adjustment wait 5 seconds a The temperature display will cease flashing and store the correction as an offset b The oven will now begin heating or allow itself to cool in O order to reach your set point with the corrected display Wait 5 Seconds value Heating with Adjusted Value Reference Device 11 Waitfor 30 minutes with no fluctuations of 0 1 C or greater after the oven has achieved the set point with L fior the corrected display offset Failure to wait until the unit is DU Wait30Minutes fully stabilized will result in an inaccurate reading Reference Device 12 Once the temperature has stabilized compare the reference device n r lt and the oven displ
15. es protective earth ground Rep re terre lectrique Indicates UP and DOWN respectively G Touches de d placements respectifs vers le HAUT et le BA Indicates a Manually Adjustable control Indique un bouton r glable manuellement Signale danger lectrique Indicates a Potential Shock Hazard Indicates the unit should be recycled Not disposed of in land fill Indique l appareil doit tre recycl Ne pas jeter dans une d charge 14 Page LAB GRAPHIC SYMBOLS CONTINUED Symbol Definition Indicates the timer Indique le minuterie Start or Stop the Timer Lancer ou arr ter le minuteur Reset the Timer R initialisation de la Minuterie Indicates Caution hot surface Indique Avertissement symbole de surface chaude gt Oo 9G 15 Page LAB CONTROL PANEL OVERVIEW SET OVER TEMPERATURE SET TIMER SET TEMPERATURE TIMER ACTIVATED START STOP OVER TEMPERATURE ACTIVATED HEATING ACTIVATED Figure 6 Control Panel Power Switch The green Power Switch controls overall power to the oven When in the ON I position the switch illuminates and the oven will heat to and maintain the currently programed temperature set point Timer Switch The black Timer Switch controls power to the timer system When this switch is in the ON position the SET TIMER display will illuminate and the oven can run a timed steady state heating profile at the current temperature set point The oven will not he
16. h Main Temperature and OTL Sensor Chamber Door wa Handle Shelf Standard Rail Door Latch Oven Chamber Chamber Liner Gasket LAB 7 Page RECEIVING YOUR UNIT CONTINUED Power Panel Back Permanent Connect Wire Braid 14 gauge 6 inches 15 cm Figure 3 SMO28G 2 Damper with Slider Damper with Slider Control Panel Door Liner Gasket Chamber Door Handle Main Temperature and OTL Sensor Shelf Standard Rail Door Latch Cha bee Oven Chamber Liner Gasket 8 Page LAB RECEIVING YOUR UNIT CONTINUED Figure 4 SMO14 2 Power Panel Back Permanent Connect Wire Braid 14 gauge 6 inches 15 cm Damper with Slider Control Panel Damper with Slider Door Liner Gasket Chamber Door Handle Main Temperature and OTL Sensor Shelf Standard Oven Chamber Rail Chamber Liner Gasket 9 Page RECEIVING YOUR UNIT CONTINUED Locate the data plate on the back of the oven below the power braid inlet The data plate contains the oven model number and serial number Technical support and your distributor will need these numbers in order to assist you in the future Date Plate Information Model Number Serial Number 10 Page LAB INSTALLATION Installation of the unit requires permanent connect wiring commonly known as hardwiring that must be performed
17. he Cleaning and Disinfecting topic in the User Maintenance section page 29 for more information on how to clean and disinfect the oven chamber Remove all wrappings and coverings from shelving prior to cleaning and installation SHELVING INSTALLATION Perform the following steps to install the SMO shelves 1 Install the shelf clips in the slots of the shelf standard rails located on the sides and rear of the chamber interior a Squeeze each clip b Insert the top tab first then the bottom tab using a rocking motion 2 Hangthe shelves from the clips Figure 5 Shelving Installed in Shelf Standard Rails LAB 13 Page GRAPHIC SYMBOLS The oven is provided with multiple graphic symbols on its exterior The symbols identify hazards and the functions of the adjustable components as well as important notes in the user manual Definition Indicates that you should consult your service manual for further instructions Indique que l op rateur doit consulter le manuel d utilisation pour y trouver les instructions compl mentaires ep lt o o Indicates Temperature Rep re temp rature Indicates the Over Temperature Limit system Indique le syst me de d passement de temperature Indicates AC Power Rep re le courant alternative Indicates 1 ON and O OFF rep re de la position MARCHE de l interrupteur d alimentation O rep re de la position ARR T de l interrupteur d alimentation Indicat
18. he chamber air temperature levels PID controlled heating pulse intensities and lengths are proportional to the difference between the measured chamber temperature and the current set point The frequency of pulses are derived from the rate of change in the difference The integral function slows the rate of pulses when the temperature nears the set point to avoid overshooting SMO ovens rely on natural heat radiation for cooling When the oven is powered the chamber air temperature cannot go below the ambient room temperature plus the internal waste heat of the oven Waste heat is generated primarily by the operation of the blower fan motor and the resulting air compression in the duct spaces In practice the temperature floor is ambient 15 C The oven depends on the operation of the blower fan to maintain temperature uniformity and Stability in the chamber Air Circulation The oven continually circulates air internally while powered Air is forced through vent holes at the back of the chamber blows across the shelf space to the front and is then pulled upward into a heating and recirculation air duct by the action of the blower fan The oven is provided with two dampener vents that may be opened or closed using dampener slides located on the oven exterior SMO forced air ovens must be run with the dampeners closed in order to achieve the stated chamber temperature uniformity and stability The dampeners are intended to speed drying or ev
19. i ini 11 POC AVON iui iaia rica dieci E pais 11 Power Source Requirements iii 11 EEN tre die ne tee ae ee A 12 LIRICA eci do te did oo ol ae 12 Ree TTT 12 e eee T 13 HO VIA TTS AO E ne 13 GRAPHIC SYMBOL S 1 err 14 CONTROL PANEL OVERVIEN nnmnnn mnnn enews 16 OPERATION eE A E E E 18 Operating ela 18 eor o ODS O ae ae E E E A AE AEA E T 19 RDA OO 21 Prepare for FSB 21 Set the Oven Temperature Set Point iii 22 eel OIIE I EA E A A AE EE E EA albini lieti 23 Temperature Display Accuracy Verification 23 Setting the Over Temperature Lm see eee eee eee 25 SAMI ee 26 Drying Racks and other Accessories iii 27 Launch a AHealng FTONG iii do de be td td ii do to dodo date 28 USER MAINTENANCE iii esse ee eens 29 Cleaning and aere ie iui 29 Calibrating the Temperature Display 30 R c edelec iii 33 Eee ea COM DO CIS een tee ce na a a de 33 UNIT SPECIFICATIONS eeann E 34 oli 34 LS ils siii 34 Cnn 34 Hell Capac y DV WON a se a de 35 TE era liceali 35 E EA 35 PARTS EST lecci 36 CAO eT E ee ee ne ee 36 3 Page LAB INTRODUCTION Thank you for purchasing a Sheldon Manufacturing SMO forced air oven We know that in today s competitive marketplace customers have many choices when it comes to constant temperature equipment We appreciate you choosing ours Our continued reputation as a leading laboratory product manufacturer rests with your sa
20. ill producing light smoking from the vent holes at the back of the chamber 3 The procedure is complete once the light smoking stops 4 Once the burn in is complete set the oven temperature to your process or application set point This prepares the oven for use as well as the optional temperature display accuracy verification TEMPERATURE DISPLAY ACCURACY VERIFICATION Note Performing an accuracy verification of the oven temperature display requires a suitable temperature reference device Please see the Temperature Reference Device entry on page 5 for the device requirements Optional The oven was calibrated at the factory at 150 C A verification process may be carried out to verify the accuracy of the SMO temperature display when preparing the oven for use if required by your laboratory or production protocol If a difference between the actual and displayed temperature is discovered perform a temperature calibration please see the Calibrate Temperature Display procedure on page 30 in the User Maintenance section Prior to a verification the oven should be run at its verification temperature for at least 1 hour in order to allow the chamber to stabilize with no fluctuations greater than 0 1 C The chamber is considered thermally stable when no fluctuations have been detected with the verification reference Wait 1 Hour device for a minimum of 30 minutes Failure to wait for stabilization will result in an inaccurate verific
21. ly 1 C above the current chamber temperature The Over Temperature Limit System activates if the oven temperature exceeds the setting of the OTL System If the oven microprocessor controller has failed or the OTL is set below your chosen temperature set point the OTL alarm indicator will turn on and off indefinitely as the OTL depowers the heating elements whenever the temperature exceeds the cutoff limit If this is happening repeat steps 1 3 to verify that the OTL is set above the temperature set point Contact technical support or your distributor if the OTL continues to activate End of procedure LAB 25 Page OPERATION CONTINUED SETTING THE TIMER This procedure enters a duration for a heating profile in the Timer system The profile will run the oven for the duration at the currently programed temperature set point Set Timer Duration Turn on the Timer system by placing the black Timer switch in the On 1 position a The Timer Display will illuminate showing the previously programed profile duration b The oven will automatically cease heating 2 Press and hold the Rest button until the Timer Display begins to blink a The display is now in its adjustable duration mode b A decimal point will illuminated between the 2 and 3 number parameters This indicates that Hours parameter is selected Timer Display will exit the adjustment mode with the last entered time values saved A Not
22. mage when brought to temperature Always set the OTL cutoff system to approximately 1 C above your application temperature set point in order to safeguard accessories against over temperature events The manufacturing defect warranty does not cover damage caused by melted or otherwise overheated accessory items LAB 2 Page OPERATION CONTINUED LAUNCH A HEATING PROFILE The oven can be run in a timed steady state heating profile at the currently selected temperature set point Allow the oven to come up to temperature prior to launching a profile See the Setting the Timer procedure on page 26 for how to set the length of the profile Note While the Timer system is on the oven will not heat unless a profile is running Launch the Heating Profile Set Timer 1 The Timer switch must be in the ON I position just prior to launching the profile 1 Hour 55 Minute Profile 2 Press the Start Stop T button to launch the current profile a The profile will launch and the TIMER ACTIVATED indicator Set Timer will illuminate O b The Timer Display will start counting down c The oven will resume heating 3 To pause a running profile press the Start Stop button T Pause Profile a The oven will cease heating until the profile is restarted reset or the Timer system is turned off b To restart the profile where it left off press the Start Stop button again 4 The oven will automatically cease heating upon
23. mperature 3 Setthe temperature set point to that of your application using the Set the Oven Temperature Set Point procedure on page 22 Procedure continued on next page 30 Page MAINTENANCE CONTINUED Calibrating the Temperature Display Continued 4 Allow the oven to run for at least 1 hour to come to temperature and stabilize Reference Device x lC i 0 5 The oven is stabilized when no fluctuations of 0 1 C or greater i LILI Wait 1 Hour have been detected on the temperature reference device for 30 minutes Reference Device 6 Once the chamber temperature has stabilized compare the reference 1 C mor device and the oven display temperature readings LU a Ifthe readings are the same or the difference between the two falls within the acceptable range of your laboratory or Set Temperature production protocol the display is accurately showing the chamber temperature b The temperature calibration procedure is now complete Reference Device 7 If there is a difference between the two readings and that difference falls outside your protocol s acceptable range offset the temperature l L H Of display value to match the reference device reading See the next step a Ifthe door was opened to check a reference device SetT i temperature inside the chamber wait 15 minutes after the eA AA reference device stops fluctuating before proceeding Ase Wait 15 Minutes x 8 Place the unit in temperatur
24. ngs t I a Ifthe readings are the same or the difference between the two 2 falls within the acceptable range of your protocol the display is accurately showing the oven chamber air Set Temperature temperature The Temperature Verification procedure is now complete 7 Reference Device If there is a difference between the two readings and that offset falls z outside your laboratory or production protocol s acceptable range i L H or perform a temperature calibration to match the Set Temperature display to the actual chamber Please see page 30 Set Temperature EE End of procedure 24 Page LAB OPERATION CONTINUED SETTING THE OVER TEMPERATURE LIMIT This procedure sets the Over Temperature Limit heating cutoff to approximately 1 C above the current temperature set point Perform the steps below once the oven has been stabilized at your application temperature set point for at least a 30 minutes Set The OTL Cutoff Example 1 If you have not done so already turn the Set Over Temperature Limit control dial clockwise to the maximum position Turn the Over Temperature Limit control dial counterclockwise until the red Over Temp Limit Activated light illuminates Slowly turn the dial clockwise until the Over Temperature Limit Activated light turns off Stop turning the control Leave the OTL dial set slightly above the activation point a The Over Temperature Limit is now set approximate
25. of the chamber exceeds the current OTL setting the OTL routes power away from the heating elements The Over Temperature Limit is set by the end user typically at approximately 1 C above the application temperature set point Because of its nature as a mechanical cutoff system and its lack of PID analytics the OTL cannot deliver the same degree of temperature stability and measurement precision as the digital display and microprocessor 20 Page LAB OPERATION CONTINUED Note Performing a temperature accuracy verification requires a suitable temperature reference device Please see the Temperature Reference Device entry on page 5 for the device requirements PREPARING THE OVEN Preform the following steps to prepare the oven for use after installing it in a new workspace environment Optional If you will be performing a temperature display accuracy verification page 23 Sheldon Manufacturing recommends introducing the temperature probe of your temperature reference device into the oven chamber now prior to powering the oven Doing so will save time when carrying out the procedure Please see step 1 of the verification procedure on page 24 for probe placement instructions The probe must be rated for at least 210 C as it will be inside the chamber during the 200 C First Use Burn In procedure 1 Turn on the oven by placing the green main power switch in the ON position 2 Perform the following procedures a Prep
26. re that the oven temperature display matches the actual air temperature inside the oven chamber Each SMO forced air oven is calibrated at the factory to 150 C Calibrate as often as required by your production or laboratory protocol or regulatory compliance requirements Prior to performing a temperature calibration the oven should be run at the temperature of your application for at least 1 hour in order to allow the chamber temperature to stabilize Failure to wait for stabilization will result in an inaccurate calibration After the chamber has stabilized a wait of 15 minutes without a change of 0 1 C or greater should suffice for the chamber to re stabilize after brief disruptions such as short door openings Calibrating the Temperature Display 1 Place the temperature sensor of the reference device inside the oven as close as possible to the geometric center of the chamber a Probes maybe introduced through the chamber door space and the door closed over probe wires Note A thermocouple sensor probe sleeve may be taped to the shelving as long as the exposed copper end is 2 inches 5cm away from the shelf An exposed sensor probe in direct contact with the shelving may experience heat sinking which can result in an inaccurate temperature reading 2 Place both dampeners in the fully closed position Failure to do so risks an inaccurate calibration due to decreased temperature stability and uniformity Dampener Closed Set Te
27. sconnect must be marked as the disconnecting device for the equipment e The power source must conform to all national and local electrical codes e The power source must be earth grounded e The power source voltage and ampere must match the power requirements listed on the oven data plate located on the back of the unit beneath the power feed inlet o These ovens are intended for 230 volt 50 60 Hz applications at the following amperages SMO14 2 12 Amps SMO28 2 and SMO28G 2 20 Amps Continued on next page SIL AR 11 Page INSTALLATION CONTINUED e Supplied voltage must not vary more than 10 from the data plate rating Damage to the oven may result if supplied voltage varies more than 10 e Use a separate circuit to prevent loss of the unit due to overloading or circuit failure s Aswitchorcircuit breaker must be used in the building installation to protect against overcurrent conditions o The required circuit breakers are SMO14 2 15A and SMO28 2 SMO28G 2 30A POWER FEED WIRING The oven comes provided with an integral 6 inch 15 cm wire braid of two 14 gauge high temperature 300 C hot wires and a 14 gauge earth ground The wires for power source connection should be in accordance with the following SMO14 2 Green Yellow Earth Red Hot Black Hot SMO28 2 SMO28G 2 Green Yellow Earth Black Hot Black Hot The oven must be grounded using the protective conductor terminal green with
28. t the model number and the serial number see page 10 EMAIL tech shellab com PHONE 1 800 322 4897 extension 4 or 503 640 3000 FAX 503 640 1366 Sheldon Manufacturing INC P O Box 627 Cornelius OR 97113 TEMPERATURE REFERENCE SENSOR DEVICE The oven does not come with a temperature reference device A reference sensor device must be purchased separately for performing accuracy verifications or calibrations of the oven temperature display The reference device must be accurate to at least 0 1 C and should be regularly calibrated preferably by a third party For best results use a digital device with a thermocouple or other remote reading probe Remote readings avoid oven chamber door openings during verification and calibration procedures This avoids subsequent waits for the chamber temperature to re stabilize Select a probe suitable for the application temperature you will be calibrating or verifying the display accuracy at Alcohol thermometers are insufficient for conducting accurate verifications and calibrations Do not use a mercury thermometer Never place a mercury thermometer in the oven chamber LAB 5 Page RECEIVING YOUR UNIT Before leaving the factory all SMO ovens are packaged in high quality shipping materials to provide protection from transportation related damage When a unit departs our factory safe delivery becomes the responsibility of the carrier Damage sustained during transit is not co
29. tability SMO14 2 Ambient 1510 260 3 0 160 C auo lt Ambient 1510 260 285 150 C M0286 2 Ambient 1510 260 85 150 C Model Heat Up Time to 150 Recovery to 150 SMO14 2 8 minutes door open 30 seconds SMO28 2 10 minutes door open 30 seconds SMO28G 2 10 minutes door open 30 seconds Model AC Voltage Amperage Frequency LAB 35 Page PARTS LIST Description Parts Number If you have the Part Number for an item you may order it directly from Sheldon Manufacturing by calling 1 800 322 4897 extension 3 If you are uncertain that you have the correct Part Number or if you need that specific item please contact Sheldon Technical Support for help at 1 800 322 4897 extension 4 or 503 640 3000 Please have the model number and serial number of the unit ready as Tech Support will need this information to match your unit with its correct part 36 Pa O je LAB Sheldon Manufacturing Inc P O Box 627 Cornelius Oregon 97113 EMAIL tech Shellab com INTERNET http www Shellab com PHONE 1 800 322 4897 503 640 3000 FAX 503 640 1366
30. th grounded electrical source that conforms to national and local electrical codes If the unit is not grounded parts such as knobs and controls may conduct electricity and cause serious injury e Avoid damaging the power feed Do not bend it excessively step on it place heavy objects on it A damaged power feed can easily become a shock or fire hazard Never use a power feed after it has been damaged e Position the equipment so the end user can quickly and easily disconnect or uncouple the power feed in the event of an emergency e Do not attempt to move the unit while in operation or before the unit has cooled 4 Page LAB INTRODUCTION CONTINUED ENGINEERING IMPROVEMENTS Sheldon Manufacturing Inc continually improves all of its products As a result engineering changes and improvements are made from time to time Therefore some changes modifications and improvements may not be covered in this manual If your units operating characteristics or appearance differs from those described in this manual please contact your Shel Lab dealer or customer service representative for assistance CONTACTING ASSISTANCE If you are unable to resolve a technical issue with your oven please contact Sheldon Technical Support Phone hours for Sheldon Technical Support are 6am 4 30pm Pacific Coast Time west coast of the United States UTC 8 Please have the following information ready when calling or emailing Technical Suppor
31. the oven 5 Do not place mercury thermometers in the oven 6 The SMO oven is not designed for use in Class I II or III locations as defined by the US National Electric Code Warning The vent dampers may be hot to the touch These areas are marked with Hot Surface labels Proper PPE should be l employed to minimize risk to burn Avertissement Les clapets d a ration peuvent tre chauds au toucher Ces zones sont marqu s avec des tiquettes de Surface chaude Les EPI appropri devraient tre employ e pour r duire au minimum le risque de br ler 18 Page LAB OPERATION CONTINUED THEORY OF OPERATION Heating When powered the SMO oven chamber will heat to and then maintain the currently programed temperature set point The oven comes from the factory with a temperature set point of 150 C The set point may be adjusted by the end user using the Set Temperature controls Heating is controlled by a microprocessor controller board that stores the temperature set point The microprocessor senses the chamber air temperature via a solid state probe located in the airstream on the back wall of the chamber When the processor detects that the chamber temperature has dropped below the temperature set point it pulses power to a heating element in a recirculation air duct space located above the oven chamber The processor employs proportional integral derivative analytical feedback loop functions when measuring and controlling t
32. tisfaction Sheldon Manufacturing Inc stands behind our products and we will be here if you need us These ovens are intended for professional industrial and educational applications The ovens are not intended for use at hazardous or household locations SMO forced air ovens are engineered for constant temperature forced air drying curing and baking applications GENERAL SAFETY CONSIDERATIONS Note Failure to follow the guidelines and instructions in this manual may create a protection impairment by disabling or interfering with the unit s safety features This can result in injury or death Before placing the oven in operation read this entire manual carefully to understand how to install operate and maintain the oven in a safe manner Keep this manual available for use by all oven operators Ensure that all operators are given appropriate training before the oven begins operation Your oven and its recommended accessories have been designed and tested to meet strict safety requirements For continued safe operation of your oven always follow basic safety precautions including e Follow any local or regional ordinances in your area regarding the use of this unit e Only use the oven for its intended range of applications e Use only approved accessories Do not modify system components Any alterations or modifications to your oven may be dangerous and will void your warranty e Always hardwire the unit s power feed to an ear
33. vered by the manufacturing defect warranty This makes it important that you inspect your oven for concealed loss or damage to its interior and exterior when receiving it If you find any damage to the unit follow the carrier s procedure for claiming damage or loss The orientation photos on the immediately following pages may serve as useful references when inspecting the oven Carefully check all packaging before discarding Save the shipping carton until you are certain that the unit and its accessories function properly INSPECTING THE SHIPMENT Carefully inspect the shipping carton for damage Report any damage to the carrier service that delivered the SMO oven If the carton is not damaged open the carton and remove the contents The unit should come with an Installation and Operation Manual and a Certificate of Compliance Verify that the correct number of components have been included Included components Shelves Shelf Clips Leveling Feet SMO14 2 3 12 4 SMO28 2 6 24 4 E Z amp 999 00006 1250512 Figure 1 Accessory Components Shelves Shelf Clips SMO28G 2 2 8 d 680053 NCF 1290912 2700506 6 Page LAB RECEIVING YOUR UNIT CONTINUED Power Panel Back Permanent Connect Wire Braid 14 gauge 6 inches 15 cm ORIENTATION AN Figure 2 SMO28 2 Damper with Slider AN Control Panel Damper with Slider B A Door Liner Gasket Door Latc
34. yellow stripe wire Do not remove the protective conductor earth connection Removing the protective conductor will negate the oven protections against potentially dangerous electric shocks and create a possible fire hazard LIFTING AND HANDLING The oven is heavy Use appropriate lifting devices that are sufficiently rated for these loads Follow these guidelines when lifting the oven e Lifttheovenonlyfrom its bottom surface e Doors handles and knobs are not adequate for lifting or stabilization e Restrain the oven completely while lifting or transporting so it cannot tip e Remove all moving parts such as shelves and trays and lock doors in the closed position during transfers to prevent shifting and damage LEVELING The oven must be level and stable for safe operation Each SMO oven ships with four leveling feet Insert one leveling foot into each of the four holes in the bottom corners of the oven Stand the oven upright Then adjust the foot at each corner until the oven stands level and solid without rocking To raise a foot turn it in a counterclockwise direction to lower a foot turn it in a clockwise direction To prevent damage when moving the oven turn each of the four leveling feet completely clockwise 12 Page LAB INSTALLATION CONTINUED INITIAL CLEANING The unit was cleaned at the factory but not sterilized Additionally it may have been exposed to contaminants en route during shipping See t
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