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Isotemp
®
Programmable Ovens
800 Series
Model 825F (Small)
Catalog # 13-247-825F & -825FC - Domestic
Catalog # 13-247-826F & -826FC - International
Model 838F (Medium)
Catalog # 13-247-838F & -838FC - Domestic
Catalog # 13-247-839F & -839FC - International
Model 851F (Large)
Catalog # 13-247-851F & -851FC - Domestic
Catalog # 13-247-852F & -852FC - International
104502 • 3/28/06
Serial Number________________________
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Table of Contents
Related Manuals for Fisher Scientific Isotemp 800 Series
Summary of Contents for Fisher Scientific Isotemp 800 Series
- Page 1 Isotemp ® Programmable Ovens 800 Series Model 825F (Small) Catalog # 13-247-825F & -825FC - Domestic Catalog # 13-247-826F & -826FC - International Model 838F (Medium) Catalog # 13-247-838F & -838FC - Domestic Catalog # 13-247-839F & -839FC - International Model 851F (Large) Catalog # 13-247-851F &...
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Page 2: Table Of Contents
Table of Contents Introduction ................................ 3 Specifications ..............................4 Performance Characteristics ........................4 Electrical Requirements..........................4 Power Requirements ............................4 Chamber Volumes ............................4 Chamber Dimensions ..........................4 Installation ................................5 Selecting a Location ............................5 Unpacking ..............................5 Preparing the Oven ............................6 Power Switch ..............................6 Controls ................................7 Display ................................7 Keypad................................8 Operation ................................9 Safety Precautions............................9... -
Page 3: Introduction
Introduction Fisher Isotemp 800 Series forced air, programmable ovens are available in three sizes: small (Model 825), medium (Model 838) and large (Model 851). All models provide PID microprocessor control at operating tempera- tures ranging from 50°C (122°F) to 325°C (617°F). -
Page 4: Specifications
Specifications Performance Characteristics Power Requirements Operating Range 50 to 325° Models 825 1800 W Models 838 3300 W Average Uniformity @ 200°* ±2°C Models 851 3300 W Resolution 1°C Chamber Volumes Control Sensitivity ±0.25°C Models 825 2.5 cu ft Recovery Time @ 200°C Models 838 3.8 cu ft Model 825... -
Page 5: Installation
Installation Selecting a Location Choose a location for the oven that will provide an area of approximately four square feet (2 ft x 2 ft). The bench or table selected must be capable of supporting at least 115 lbs for the Model 825, 120 lbs for the Model 838, or 130 lbs for the Model 851. -
Page 6: Preparing The Oven
NSTALLATION Preparing the Oven Caution To prepare the oven for operation, perform the following See data plate on oven for voltage, procedures: current and line frequency specifica- Install the shelf(ves). tions. Check that the power require- ments of the oven will not overload the Make certain all packing material has been circuit to which it will be connected. -
Page 7: Controls
Controls Display The Fisher 800 Series Programmable Ovens are equipped with a digital PID control routine that gives pre- cise temperature controlability. The control is capable of storing multiple 24-step programs for ramp and soak pro- filing. The following sections briefly describe the locations and functions of various display fields and keypad controls. -
Page 8: Keypad
ONTROLS Keypad The 800 Series incorporates a four-key, tactile keypad (see Figure 1). The function of each key is discussed individually below. During programming or setup, successively pressing the Menu Key causes the controller display to sequentially step through menu selections. In Control mode, pressing the Up Arrow Key increases the oven set temperature, as indicated on the Set Display. -
Page 9: Operation
Operation Safety Precautions Before operating ovens, always observe the following safety precautions: • This unit is not explosion proof. Do not use in the presence of flammable or combustible materials; Fire or explosion may result. Unit contains compo- nents that may ignite such materials. •... -
Page 10: Ramp And Soak Mode
PERATION Observe the set temperature in the Set Display Note window. To rapidly increase or decrease the set temperature press and hold the To decrease the set temperature, press the appropriate arrow key. To slowly Down Arrow Key. increment or decrement the set tem- perature one degree at a time, press To increase the set temperature, press the Up and immediately release the arrow... -
Page 11: Creating A Ramp And Soak Program
PERATION A Jump Loop operation causes program execution to jump to another designated program step. Each program step, up to the Jump Loop, is then sequentially repeated. Use of a Jump Loop allows a programmed temperature cycle to be repeated up to 100 times. A Jump Loop can- not be used as the first step in a program. - Page 12 PERATION Press the Menu Key to edit step #1, or use the Up or Down Arrow Key to change the step num- ber to the desired step for editing before press- ing the Menu Key. The Set Display then indicates “StyP” to signify that step type must be selected from a menu of four operations being shown in Actual Display.
- Page 13 PERATION 12. The Set Display then indicates “rAtE” to prompt the operator to select a desired heating or cool- ing rate in degrees/min. Press and hold or until the desired rate is shown in the Actual Display. Press the Menu Key to enter the selected rate. Proceed to step 20.
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Page 14: Running, Stopping Or Resuming A Program
PERATION Actual Display to indicate the desired step num- ber to jump to. Press the Menu Key to enter the jump step. NOTE: The jump step number must be lower than the current step number. The jump cannot be to the current step or a higher step. - Page 15 PERATION To run a program currently in memory, perform the follow- ing steps: Press the Run Key once. The Run indicator light begins to flash and the displays indicate which program in memory is ready to run. To change program numbers, press the Up or Down Arrow Key.
- Page 16 PERATION The specific control parameters displayed in any instance depend upon whether the current step is a Set Point or a Soak operation. The sequence of control parameters dis- played in each case, and the corresponding Set Display messages, is as follows: Ramp Step End Set Point Target final temperature at the...
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Page 17: An Example Program
PERATION An Example Program Implementing the following program provides a good example of how to program the 800 Series ovens for ramp/soak operations. Step 1: Ramp from ambient to 200°C at 8.0°C/min. Step 2: Ramp from 200°C to 325°C at 4 °C/min. Step 3: Soak at 325°C for two hours Step 4: Turn off power to the heaters and allow to oven cool. - Page 18 PERATION Programming Step 2: Press the Menu Key again. The displays will indicate the next program step for editing (“2 Step”). Press the Menu Key to enter the step. Use the Up or Down Arrow Key to select the step type for step #2. Press the Menu Key when the displays indicate “SP StyP”.
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Page 19: Menu Items
PERATION Programming Step 4: 18. Press the Menu Key to initiate programming the fourth program step (“4 StEP”). 19. Use the Up or Down Arrow Key to adjust the Actual Display to indicate the End operation (“End StyP”). Press the Menu Key to select End. -
Page 20: Units (°C/°F)
PERATION To enter a Temperature Offset, carry out the following steps: With the oven in Control Mode, press the Menu Key twice. This will bypass the program edit mode and bring up the Temperature Offset (“0 CAL”) display. To change the offset value, use the Up Arrow Key (to increase) or Down Arrow Key (to decrease). -
Page 21: Power Loss Options
PERATION Further menu items will begin to appear. Press the Menu Key two additional times for the con- troller to again display the Set and Actual tem- peratures (control mode). Power Loss Options In the event of a power loss during program execution, the controller will react in one of three ways: •... -
Page 22: Serial Communications
PERATION Serial Communications The final menu item is for serial communications enable. The communications feature will only work on the follow- ing ovens: 13-247-825FC 13-247-826FC 13-247-838FC 13-247-839FC 13-247-851FC 13-247-852FC The controller communicates using an RS232 serial port located on the lower-left side of the oven base, in the Note center of the ventilation screen. -
Page 23: High Alarm
PERATION Enter the value by pressing the Menu Key. The controller will automatically return to the Control Mode. When the above parameters are set equal to that of the communicating device, the control will immediately begin logging. The control logs data in the following format: Actual Temperature, Set Temperature, Units, Alarm State Example: 148, 150, C, Off High Alarm... -
Page 24: Service
Service Dept. at 1-800-395-5442. For technical assistance call 1-800-926-0505. Replacing the Door Gasket The Isotemp 800 Series ovens incorporate a durable, fiberglass door gasket to minimize heat loss. Should the gasket become defective or be damaged, it may be replaced by following the procedures below. -
Page 25: Accessing The Electronics
ERVICE Accessing the Electronics Warning To access the electronics compartment, proceed as fol- Service procedures requiring access lows: to the electronics compartment involve Disconnect power cord from the electrical outlet. exposure to line voltage and should be Slide the oven forward until the front feet are at done only by qualified service person- the edge of the bench top. -
Page 26: Replacing The Heater
ERVICE Replacing the Heater To replace a defective heater, proceed as follows, refer to Fig. 2: Warning Disconnect power cord from the electrical outlet. Allow oven to cool to ambient tem- perature before attempting repair. Remove the two screws that secure the heater cover. -
Page 27: Replacing The Circulating Fan Motor
ERVICE Replacing the Circulating Fan Motor To replace a defective circulating fan motor, proceed as follows: Complete the procedures discussed in Accessing the Electronics Compartment and Replacing the Heater steps 1 & 2 (remove the heater cover). Note and observe all Caution statements. -
Page 28: Replacing The Controller
ERVICE Replacing the Controller Caution To replace a defective controller, proceed as follows: The programmable controller contains Complete the procedures discussed in static sensitive parts which may be Accessing the Electronics Compartment, noting damaged if not handled correctly. Be all caution statements. sure the installer is properly grounded before handling controller. -
Page 29: Replacing The Safety Relay
ERVICE Lift out the solid state relay. Put new solid state relay in place, making certain that the thin, con- ductive pad remains between the solid state relay and the bezel. Generally reverse the steps above to reassem- ble oven. Replacing the Safety Relay To replace a defective safety relay, proceed as follows: Complete the procedures discussed in... -
Page 30: Replacing The Door Hinges
ERVICE Pull thermocouple forward into oven chamber, exposing roughly a 6-inch section of the thermo- couple wire. Cut the thermocouple wire to remove the ther- mocouple sheath. Securely loop together the cut end of the defec- tive thermocouple with the two leads of the replacement thermocouple. -
Page 31: Adjusting The Door Cam
ERVICE Replacing the Handle Warning To replace a defective door handle, perform the steps Allow oven to cool to ambient tem- below: perature before attempting repair. Remove the two mounting screws holding latch cover in place. Remove the two mounting screws holding defective handle in place. -
Page 32: Troubleshooting
Troubleshooting This table is intended to assist in resolving incubator problems by relating symptoms to their likely cause. The service discussed below is beyond the scope of most users and should be performed by qualified and trained personnel. Symptom Probable Cause Action No power. -
Page 33: Replacement Parts
Replacement Parts Replacements for oven parts may be ordered, by part number, from Fisher Customer Service at 1-800-766-7000. Item Part Number Line Cord and Plug Model 825 (120 V) SPN 83903 Models 838 & 851 (240 V Domestic) SPN 95774 Models 825, 838 &... -
Page 34: Schematic
Schematic Diagram... -
Page 36: Warranty
Warranty Laboratory instruments and equipment manufactured by Fisher Scientific Company L.L.C. – Laboratory Equipment Division (hereinafter called “the Company”) are warranted only as stated below. Subject to the exceptions and upon the conditions specified below, the Company agrees, at its election, to...
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