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These ovens require permanent connect wiring (also known as hardwiring) to a power supply. Pictured on the front cover, left to right: SMO38HP-2, SMO14HP-2 Warning: This product contains chemicals, including triglycidyl isocyanurate, known to the State of California to cause cancer as well as birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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SLFHP1422-H SLFHP3822-H The Part ID denotes the specific build version of the model. SHEL LAB is a brand of Sheldon Manufacturing, INC, an ISO 9001 certified manufacturer. Safety Certifications These units are CUE listed by TÜV SÜD America 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 –...
INTRODUCTION Thank you for purchasing a SHEL LAB oven. We know you have many choices in today’s competitive marketplace when it comes to constant temperature equipment. We appreciate you choosing ours. We stand behind our products and will be here if you need us.
Therefore, some changes, modifications, and improvements may not be covered in this manual. If your unit’s operating characteristics or appearance differs from those described in this manual, please contact your SHEL LAB dealer or customer service representative for assistance.
INTRODUCTION EFERENCE ENSOR EVICE Must be purchased separately A reference sensor device is required for calibrating the oven temperature display. Reference devices must meet the following standards: Accurate to at least 0.1°C • Temperature The device should be regularly calibrated, preferably by a third party. Reference Temperature Probes Use a digital device with wire thermocouple probes that can be introduced into the unit chamber...
6. Verify that the correct number of accessories has been included. Carefully check all packaging for accessories before discarding. Included Accessories Model Shelves Shelf Clips Leveling Feet SMO14HP-2 24 Clips SMO38HP-2 48 Clips Shelf Types SMO14HP-2 SMO38HP-2 11 | P a g e...
RECEIVING RIENTATION MAGES SMO38HP-2 Exhaust Vent Temperature Sensor Probes Intake Vent Control Panel Chamber Gasket Shelf Standard Mounting Rail Note: The unit has a single oven chamber with two doors. 12 | P a g e...
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RECEIVING SMO14HP-2 Intake Vent Exhaust Vent Control Panel Chamber Gasket Temperature Sensor Probes Shelf Standard Mounting Rail Note: The unit has a single oven chamber with two doors. 13 | P a g e...
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RECEIVING Back of Units Power Panel (see page 15) 9-pin RS485 Data Port Data Plate 14 | P a g e...
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RECEIVING Power Panel (back of ovens) Accessory Outlet, NEMA 6-20R Fuse Holders for Accessory Outlet (2 amps each) Power Supply Wiring Braid Permanent Connect Wire Braid 6-gauge, 6 inches (150 mm) Oven Vents Exhaust Intake 15 | P a g e...
RECEIVING ECORD THE LATE NFORMATION The data plate contains the unit model number, serial number, part number, and part ID. Customer Support will need this information during any support call. Record it below for future reference. The data plate is located on the back of the oven, next to the power inlet. •...
INSTALLATION ARDWIRE EQUIREMENT The oven requires permanent connect wiring (commonly known as hardwiring). Wiring to the power source must be performed by a qualified electrical technician. All other Installation steps can be performed by the end-user. NSTALLATION HECKLIST For installing the unit in a new workspace location. Pre-Installation ...
12 inches (305 mm) of vertical headspace clearance will suffice if the oven exhaust is • vented from the workspace through a duct or other channeling. Do not place objects on top of the oven. Exception: A power exhaust blower offered by Shel Lab may be mounted on the exhaust vent. 18 |...
The recommended circuit-breakers are: SMO14HP-2 30 amps • SMO38HP-2 60 amps • Power Feed Disconnect: The oven must be positioned so that all end-users have access to the power feed disconnect in case of emergencies.
INSTALLATION OWER IRING The oven comes provided with an integral 6-inch (150 mm) wire braid consisting of: Two 6-gauge hot wires and a 6-gauge earth ground. • The wires for power source connection should be in accordance with the following for all units: Green/Yellow –...
INSTALLATION EVELING Install the 4 leveling feet in the corner holes on the bottom of the oven. The unit must be level and stable for safe operation. Note: To prevent damage when moving the unit, turn all 4 leveling feet so that the leg of each foot sits inside the unit.
INSTALLATION EIONIZED AND ISTILLED ATER Do not use deionized water to clean the unit, even if DI water is readily available in your laboratory. The use of deionized water may corrode metal surfaces and voids the manufacturing • warranty. The manufacturer recommends the use of distilled water in the resistance range of 50K •...
INSTALLATION HELVING NSTALLATION Airflow: The horizontal airflow in the chamber moves from the small duct holes in the chamber right wall, across the shelf space, and into the large holes in the left wall. To maximize airflow, avoid obstructing the duct holes on either side as much as possible when placing shelves. Spacing: Space the shelves evenly in the oven chamber to ensure the best possible temperature uniformity.
GRAPHIC SYMBOLS The unit is provided with graphic symbols on its exterior. These identify hazards and adjustable components as well as important notes in the user manual. Symbol Definition Consult the user manual Consulter le manuel d'utilisation Indicates adjustable temperature Indique température réglable AC Power Repère le courant alternatif...
CONTROL OVERVIEW Control Panel Power Switch The switch illuminates when in the ON ( I ) position. Temperature Controller – Display on Homepage Top Line (Red): Present chamber air temperature Middle Line (Green): The constant temperature setpoint Bottom Line: Flashing “2” indicates active heating While on the homepage, the Up and Down arrow buttons adjust the constant temperature setpoint.
OPERATION Safe operation of the oven is dependent on the actions and behavior of the oven end-users. Operating personnel must read and understand the Operating Precautions in this section prior to operating the oven. The end-users must follow these instructions to prevent injuries and to safeguard their health, environment, and the materials being treated in the oven, as well as to prevent damage to the oven.
OPERATION HEORY OF PERATIONS Heating When powered, the oven heats to and maintains a user-selected target setpoint in the oven chamber. The oven senses the chamber air temperature using a solid-state probe mounted on the right chamber wall. When the oven detects that the chamber temperature has dropped below the target setpoint, it pulses power to the heating elements.
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OPERATION Vents: Intake and Exhaust The oven is provided with an intake vent and an exhaust vent that may be opened or closed using dampener slides located on the vents. The dampeners are intended to be opened after the heat treatment or bake out phases of an application are complete.
OPERATION UT THE VEN INTO PERATION Perform the procedures below after the unit has been installed in a new workplace location. These prepare the oven for normal use. Turn on the Oven Place the oven Power Switch in the ON ( I ) position. The controller display will illuminate and default to •...
OPERATION ET THE EMPERATURE IMIT Note: Test the high limit system once per year for functionality. Set the high temperature limit at least 10°C above the highest temperature the oven will run at during your recipe program or constant-temperature application. See the High Temperature Limit system explanation on page 31.
OPERATION ETTING THE ONSTANT EMPERATURE ETPOINT Adjust the constant temperature setpoint on the homepage Stay 10°C below the high limit • setpoint. Note: Holding down an arrow button will cause the temperature to advance in increments of ten (10). Adjust Release the arrow buttons after adjusting the setpoint There may be a brief pause as the oven controller •...
OPERATION EMPERATURE IMIT CTIVATED The High Limit system cuts off heating in the oven whenever the chamber temperature meets or exceeds the Limit setting. Heating remains disabled until the oven end-user clears the Limit cutoff. Indicators When heating is cut off, the oven display flashes two alternating alert screens. Alternating Alert Screens Additionally, an illuminated “4”...
OPERATION ENTING XHAUST Optional: The oven does not require venting to operate. However, evacuating exhaust out of the workspace can help prevent elevated ambient temperatures and the buildup of unpleasant odors. Obtain flexible, non-insulated ducting. • Attach the ducting to the lip of the exhaust port on the top, left side of the oven. See the •...
Leave the oven exhaust vent closed until it is time to turn on the blower. SHEL LAB offers an accessory forced-air power exhaust blower that can be mounted directly on the exhaust vent cover. The blower is self-cooling when powered and running.
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OPERATION Continued from the previous page Activating the Power Exhaust Blower The exhaust blower can be activated either as part of a heating recipe program or manually from the homepage Options menu while running a constant temperature setpoint. Operation of the exhaust blower will significantly impact the oven chamber temperature and should be used after completing a heat application.
OPERATION The 9-pin RS485 data port, located on the back of the oven, connects to the oven temperature controller. The port is primarily intended for updating the controller software but can be used for data logging and graphical temperature recipe programming. Accessing the controller with a computer requires a 9-pin RS485-to-USB converter cable and driver software.
USER MAINTENANCE Warning: Disconnect the unit from its power supply prior to performing maintenance or services. Avertissement: Débranchez cet appareil de son alimentation électrique avant d'effectuer la maintenance ou les services. LEANING AND ISINFECTING If a hazardous material or substance has spilled in the unit, immediately initiate your site Hazardous Material Spill Containment protocol.
Failure to maintain the integrity of the door system shortens the lifespan of the oven. LECTRICAL OMPONENTS Electrical components do not require maintenance. If the oven fails to operate as specified, please contact your SHEL LAB distributor or Customer Support for assistance. 42 |...
MAINTENANCE ALIBRATING THE EMPERATURE ISPLAY Note: Performing a temperature display calibration requires a temperature reference device. Please see the Reference Sensor Devices entry on page 9 for device requirements. Temperature calibrations match the temperature display to the actual air temperature inside the oven chamber.
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MAINTENANCE 6. The unit temperature must be stable in order to perform an accurate calibration. The temperature is considered stabilized when the oven chamber has operated at your • calibration temperature for at least 1 hour with no fluctuations greater than the specified temperature stability of the oven (see the Unit Specifications chapter).
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MAINTENANCE Calibration continued Unlock the controller. See the Unlocking procedure on page 47. • Note: The temperature controller must be unlocked in order to access the Operations menu and enter a calibration offset. Navigate to the Operations menu after unlocking the controller.
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MAINTENANCE Calibration continued Wait for 30 minutes for the oven to stabilize, after the oven has achieved the setpoint with the corrected display value. Failure to wait until the oven is fully stabilized will • result in an inaccurate reading. Reference Device Compare the reference device reading with the chamber display again.
MAINTENANCE NLOCKING THE EMPERATURE ONTROLLER The oven temperature controller is software locked at the factory to ensure the integrity of its configuration file. This safeguards against end-users accidentally altering the oven functionality or safe operating bounds. The controller must be unlocked in order to access the Operations menu and enter calibration offsets.
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MAINTENANCE Unlocking the Controller Continued Advance to the second security parameter, “LoC.P” a. Push the Advance button once, saving the previous parameter and advancing to the next parameter. Adjust the LoC.P setting from 2 to 3. a. Push the Up arrow button. Advance twice.
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MAINTENANCE Unlocking the Controller Continued Change the “SLoC” parameter from 2 to 5. a. Push the Up arrow button. Return to the homepage to access the now unlocked Operations page. a. Push the Reset button twice. Relocking the Controller Always relock the controller after completing a calibration or other Operations menu procedure. To relock the controller, repeat the Unlocking procedure, only this time restore all of the •...
MAINTENANCE — D EATING SSUES IAGNOSTIC UESTIONNAIRE If the unit is experiencing heating issues, use this questionnaire to gather information on the unit prior to contacting Customer Support. Gathering and sharing this information aids Customer Support in making timely and accurate remote diagnoses. Additionally, datalogger files, as well as pictures and videos of the unit in its failure mode, are valuable diagnostic resources that can be shared with Customer Support.
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MAINTENANCE Note: Does the car actually have gas in the tank? Have you physically verified the computer is plugged in? Yes, we are going to ask some very basic questions. Please bear with us. Methodical verifications and the elimination of potential failure causes are often the quickest means of getting a unit back into operation.
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MAINTENANCE Required Item: Temperature reference device. A calibrated digital thermometer with wire thermocouple probes. The device must be accurate to at least 0.1°C. Preparing for the Heating Diagnostic Observations The unit must be hardwired to a power source that meets the requirements in the Installation chapter (page 19) and turned on.
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MAINTENANCE Heating Diagnostic Questions Record the answers in the log on page 54. etpoint? What is the current temperature setpoint? Chamber Temperature in Red Setpoint in Green hamber Temperature? What temperature is presently showing on the temperature controller display? eference? Optional: What temperature is the reference device presently showing for the chamber? eating Indicator On? Is the heating active indicator on the temperature controller display flashing or otherwise...
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MAINTENANCE Heating Diagnostic Data Log Record answers to the Heating Diagnostic questions in this log. These document the unit behavior. Diagnostic Questions Record Answers and Any Notes Here etpoint, present setting: hamber Temperature, present reading: eference Device, present reading: eating Indicator On, Y/N? igh Limit Activated, Y/N? mbient, present temperature:...
EIGHT Model Shipping SMO14HP-2 563 lb / 255 kg 449.0 lb / 203.7 kg SMO38HP-2 1078 lb / 489 kg 595.0 lb / 270.0 kg IMENSIONS By Inches Model Exterior W × D × H Interior W ×...
Shelf Capacity by Weight Model Per Shelf Maximum Total Weight SMO14HP-2 75.0 lb / 34.0 kg 450.0 lb / 204.0 kg SMO38HP-2 75.0 lb / 34.0 kg 900.0 lb / 408.0 kg Maximum Number of Shelves Model Max Shelves SMO14HP-2...
SPECIFICATIONS EMPERATURE ERFORMANCE Range Model Operating Range SMO14HP-2 Ambient +15° to 260°C SMO38HP-2 Ambient +15° to 260°C Uniformity Model @ 80°C @ 150°C @ 260°C SMO14HP-2 1.5°C 2.5°C 5.5°C SMO38HP-2 1.5°C 2.5°C 5.5°C Stability Model @ 80°C @ 150°C @ 260°C SMO14HP-2 ±...
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Recovery Times from a 30 Second Door Opening Model @ 80°C @ 150°C @ 260°C SMO14HP-2 3 Minutes 3 Minutes 6 Minutes SMO38HP-2 3 Minutes 3 Minutes 5 Minutes Recovery Times from a 60 Second Door Opening Model @ 80°C @ 150°C @ 260°C...
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Accessories and replacement parts can be ordered online at parts.sheldonmfg.com. If the required item is not listed online, or if you require assistance in determining which part or accessory you need contact SHEL LAB by emailing parts@sheldonmfg.com or by calling 1-800-322- 4897 ext. 3 or (503) 640-3000 ext. 3.
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