1. Manuals
  2. Brands
  3. Thermo Electron Manuals
  4. Laboratory Equipment
  5. 3940 Series
  6. Operating and maintenance manual

Thermo Electron 3940 Series Operating And Maintenance Manual

Hide thumbs Also See for 3940 Series:
Table of Contents

Advertisement

Quick Links

Download this manual
Model 3940 Series
Forma Environmental Chamber
Operating and Maintenance Manual
7043940 Rev. 7
Analyze • Detect • Measure • Control
™

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 3940 Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Thermo Electron 3940 Series

Summary of Contents for Thermo Electron 3940 Series

  • Page 1 Model 3940 Series Forma Environmental Chamber Operating and Maintenance Manual 7043940 Rev. 7 Analyze • Detect • Measure • Control ™...
  • Page 2 22337 5/11/04 Removed reference to Hold/Run key for silence on Watlow, chg pending 22070/22129 1/29/04 Pre-programmed controller/changed thermal fuse 1/26/04 Updated section 3.1.E dehumidification 20843 11/20/03 Release 9 ECR/ECN DATE DESCRIPTION Thermo Electron Corporation Thermo Electron Corporation Model 3940 Series...
  • Page 3 Material in this manual is for information purposes only. The contents and the product it describes are subject to change without notice. Thermo Electron Corporation 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.
  • Page 4 EU Member State European Country, and this product should be disposed of or recycled through them. Further information on Thermo Electron’s compliance with this directive, the recyclers in your country and information on Thermo Electron products will be available at www.thermo.com.
  • Page 5 Preface Model 3940 Series Thermo Electron Corporation Thermo Electron Corporation...
  • Page 6 • Repairs to parts or systems resulting from unauthorized unit modifications. • Any labor costs other than that specified during the parts and labor warranty period, which may include additional warranty on CO sensors, blower motors, water jackets, etc. Thermo Electron Corporation Thermo Electron Corporation Model 3940 Series...

  • Page 8: Table Of Contents

    Heatless Dryer (Optional) ....... . .2-5 Thermo Electron Corporation Model 3940 Series...
  • Page 9 Warranty Information .........9-1 Model 3940 Series...

  • Page 10: Installation And Set-Up

    Leveling the Unit Place a bubble-type level on a shelf inside the incubator. Adjust the feet as needed; counterclockwise to lengthen or clockwise to shorten. Level the unit front-to-back and left-to-right. Thermo Electron Corporation Model 3940 Series...

  • Page 11: Connect Water Inlet For Humidity System

    Caution To prevent mineral buildup on humidity generator walls, it may be necessary to clean the humidity generator with a non-metallic abrasive pad and flush thoroughly every two to three months. Refer to Section 4, Cleaning the Humidity Steam Generator. Model 3940 Series Thermo Electron Corporation Thermo Electron Corporation...

  • Page 12: Alternate Water Supply For Humidity System

    CO data. A terminal strip is located on the back of the incubator for convenience. Refer to Figure 1-3 for terminal pin identification. Figure 1-3. Terminal Pin Identification Thermo Electron Corporation Model 3940 Series...

  • Page 13: Remote Alarm Contacts

    On for most applications. When running Low or No humidity at high temperatures, the refrigeration switch may be turned Off. Caution The defrost switch must be turned on when the temperature setpoint is 10°C, or below. Model 3940 Series Thermo Electron Corporation...

  • Page 14: Set The Overtemp Safety Thermostat

    When an undertemp condition occurs, the cause must be determined and corrected before normal operation under the main temperature controller can be resumed. Thermo Electron Corporation Model 3940 Series...

  • Page 15: Cobex Recorder (Optional)

    3. Install the new chart, positioning it so that the correct time line coincides with the time line groove on the chart plate. 4. Replace the center knob and screw it tightly against the chart. Model 3940 Series Thermo Electron Corporation...

  • Page 16: Change The Pen

    0 to 2000 psig to monitor tank pressure. The low-pressure gauge should have an indicating range of 0 to 30 psig to monitor input pressure to the incubator injection system. A suitable two-stage pressure regulator is available. Thermo Electron Corporation Model 3940 Series...

  • Page 17: Set The Co 2 Content

    Do not open door during the stabilization period. To set the CO content (0% to 20%), press the Up or Down Arrow keys on the Watlow SD Controller. Figure 1-6. Watlow SD Control Model 3940 Series Thermo Electron Corporation...

  • Page 18: Co Control And Indicators

    The CO alarm high and low setpoints are established through the Watlow SD CO controller (ALO, and AHI). Refer to the Configuration Record included at the end of Section 4. Thermo Electron Corporation Model 3940 Series...

  • Page 20: Start-Up And Operation

    Figure 2-3. Switches Refrigeration Switch and Indicator Light (Figure 2-3) The refrigeration switch controls power to the refrigeration system. The refrigeration indicator lights when the refrigeration switch is on and the compressor is receiving power. Thermo Electron Corporation Model 3940 Series...
  • Page 21 If an overtemp condition occurs, the alarm can only be silenced by raising the overtemp safety thermostat setting. However, the cause of the problem must be determined and corrected before normal operation under the main temperature controller is resumed. Model 3940 Series Thermo Electron Corporation...
  • Page 22 The humidity alarm is a function of the humidity controller (Figure 2- 5). When the cabinet humidity goes outside the set parameters of the controller, L4 indicator on the controller lights, the audible alarm sounds, and the humidity alarm indicator on the control panel lights. Thermo Electron Corporation Model 3940 Series...

  • Page 23: Set The Operating Temperature

    The lower display shows the humidity setpoint. To raise the setpoint, press the Up or Down Arrows. Humidity is set in one percent increments. Figure 2-7. Changing Humidity Model 3940 Series Thermo Electron Corporation...

  • Page 24: Air Exchange Ventilator Caps

    The optional heatless dryer (P/N 1900139) provides dehumidification for (Optional) the incubator chamber. The dehumidify switch must be turned On for the dryer to operate. The dryer is controlled with the humidity controller and should operate at 90 psi. Thermo Electron Corporation Model 3940 Series...

  • Page 26: Routine Maintenance

    Depending on the quality of water used in the humidification system, it Humidity Generator may be necessary to clean the humidity generator every 2 to 3 months. Refer to Section 4 for cleaning instructions. Thermo Electron Corporation Model 3940 Series...

  • Page 27: Preventive Maintenance

    The following is a condensed list of preventive maintenance requirements. See the specified section of the instruction manual for further details. Thermo Electron has qualified service technicians, using NIST traceable instruments, available in many areas. For more information on Preventive Maintenance or Extended Warranties, please contact us at the number below.
  • Page 28 Preventive Maintenance for Environmental Chambers Refer to Manual Section Action Yearly 2 Years 5 Years 6 Years Inspect door latch, hinges and door gasket seal Check air exchange ventilator caps for adjustment; open or close as required Perform a complete decontamination procedure. Wipe down interior, shelves, Between Experiments side panels with disinfectant.

  • Page 30: Service

    5. Open the control panel by removing the four screws located on the top and bottom of the control panel. Figure 4-1. To Open Control Panel Thermo Electron Corporation Model 3940 Series...

  • Page 31: Humidity/Temp Sensor

    4. Route the probe wire through the access hole into the control housing. 5. Connect the probe to the appropriate controller wiring. 6. Reseal the probe access hole with Permagum and tie-wrap the probe wire to existing wires. Model 3940 Series Thermo Electron Corporation...

  • Page 32: Program Humidity/Temp Controllers

    (SW#2 is the top switch when looking at module from right side.) 4. Very carefully, replace module into frame and press firmly on the top and bottom of the bezel until all four locking tabs “click” into place. Thermo Electron Corporation Model 3940 Series...

  • Page 33: Remove Software Lockout

    3. Press the Mode key to scroll through the menus until the lower displays show “Loc” (Figure 4-6). Press the Down arrow key until the “2” becomes “0” (zero) as shown in Figure 4-7. Figure 4-6. 2 and Lock Appear Figure 4-7. Change 2 to 0 Model 3940 Series Thermo Electron Corporation...

  • Page 34: Controller Configuration

    Figure 4-9. Red DIP Switches 7. Return the controller to its frame and firmly press the top and bottom of the bezel until all four locking tabs “click” into place. Thermo Electron Corporation Model 3940 Series...
  • Page 35 On SW2 by moving the white toggle towards the back of the module. 8. Return the controller to its frame and press firmly on the top and bottom of the bezel until all four locking tabs “click” into place. 9. Turn On the main power switch. Model 3940 Series Thermo Electron Corporation...

  • Page 36: Replace Optional Recorder And Probe(S)

    If an adjustment is necessary, press either the #1 or #2 arrow to move pen left or right. The arrow must be held about five seconds before pen begins to move. Release the arrow when pen matches thermometer. Thermo Electron Corporation Model 3940 Series...

  • Page 37: Set Door Heater Control

    1. Remove all contents from the incubator, turn it off, and disconnect from power source. 2. Turn off the valve supplying the sterile distilled water. 3. From the stepladder, remove the eight screws securing the top of the incubator cabinet. Model 3940 Series Thermo Electron Corporation...
  • Page 38 Also clean the inside of the steam tube using a test tube brush. Repeat cleaning with soap and water as necessary. 9. Re-assembly in reverse order. Replace the cabinet top and return incubator to service. Thermo Electron Corporation Model 3940 Series...

  • Page 39: Co 2 Controller Calibration

    1. Press the Advance key until “CAL” appears in the lower display. 2. Use the up and down arrows to make offset adjustment. 3. Press the Infinity key to exit the calibration menu. Figure 4-13. Key Locations 4-10 Model 3940 Series Thermo Electron Corporation...
  • Page 40 (6)**** SYS: Ei1S Ent4 A3LO A4Hi Ei2S A2LO A3LHi -73.3 Ent3 A2Hi A4LO (7)**** PID: 0.50 0.25 0.19 0.25 30.0 PROG: See Programming Sheets if required. ***SET THESE PARAMETERS FIRST ****CONFIGURE CONTROL IN IDENTIFIED ORDER. Thermo Electron Corporation Model 3940 Series 4-11...
  • Page 41 A4LO * These values are customer settable to there alarm points. (7)**** PID: 0.05 0.35 0.35 0.03 30.0 PROG: See Programming Sheets if required. ***SET THESE PARAMETERS FIRST ****CONFIGURE CONTROL IN IDENTIFIED ORDER. 4-12 Model 3940 Series Thermo Electron Corporation...
  • Page 42 NOTES: ¹ - Lock out setting range 1 to 4. (Factory set at 3) ² - %power output display. Not configurable. ³ - User settable calibration offset. - User selectable alarm points. Thermo Electron Corporation Model 3940 Series 4-13...
  • Page 43 HONEYWELL TRULINE CONFIGURATION RECORD SHT 1 OF 4 CUSTOMER: JOB NUMBER: UNIT SERIAL #: CONTROL TYPE: PREPARED BY: DATE: COMPLETED BY: DATE: GROUP FUNCTION VALUE OR GROUP FUNCTION VALUE OR PROMPT PROMPT SELECTION PROMPT PROMPT SELECTION TUNING1 PROP BD or CHART CHRTSPD 7 DAY...
  • Page 44 HONEYWELL TRULINE CONFIGURATION RECORD SHT 2 OF 4 GROUP FUNCTION VALUE OR GROUP FUNCTION VALUE OR PROMPT PROMPT SELECTION PROMPT PROMPT SELECTION PEN4 PEN4 DISABLE INPUT4 DECIMAL PEN4IN UNITS CHART4HI ENGUNITS CHART4LO IN4TYPE PEN4ON XMITTER PEN4OFF IN4HI MAJORDIV IN4LO MINORDIV CUTOFF4 RNG4TAG INPTCOMP...
  • Page 45 HONEYWELL TRULINE CONFIGURATION RECORD SHT 3 OF 4 GROUP FUNCTION VALUE OR GROUP FUNCTION VALUE OR PROMPT PROMPT SELECTION PROMPT PROMPT SELECTION CONTROL2 PID SETS ALARMS A1S1 VAL SW VALUE A1S2 VAL SP SOURC A1S1 TYPE NONE RATIO A1S2 TYPE NONE BIAS A1S1 HL...
  • Page 46 HONEYWELL TRULINE CONFIGURATION RECORD SHT 4 OF 4 GROUP FUNCTION VALUE OR GROUP FUNCTION VALUE OR PROMPT PROMPT SELECTION PROMPT PROMPT SELECTION EVNT MSG EVENT 1 NONE MESSAGE 1 POSITION 1 EVENT 2 NONE MESSAGE 2 POSITION 2 EVENT 3 NONE MESSAGE 3 POSITION 3...

  • Page 48: Specifications

    Insulation ..2” (5.1cm) Foamed urethane Outer Door Gasket . .Four sided vinyl compression Finish . . Powder coated. Salt spray tests exceed 1000 hrs. per ASTM Standard B117-85 * Better than ±0.5°C uniformity at all other temperature parameters. Thermo Electron Corporation Model 3940 Series...
  • Page 49 Compressor ..1/4 Horsepower, air-cooled Refrigerants ..... . .Non-CFC Model 3940 Series Thermo Electron Corporation...
  • Page 50 Interior ..31.00”W x 60.00”H x 27.00”F-B (78.74 cm x 152.40 cm x 68.58 cm) Continuing research and improvements may result in specification changes at any time. Performance plus or minus the least significant digit unless otherwise specified. Thermo Electron Corporation Model 3940 Series...

  • Page 52: Spare Parts

    630090 Heater (wirewound) 205062 Condensing Unit, 1/4 HP 115V R-134A 991334 Solenoid, 120V .101” Port (Refrig.) 230214 Thermal Fuse, 250V 17A 830044 Blower Motor, 1/4 HP, 115V 110092 SS Humidity tank 300175 SS Relay Thermo Electron Corporation Model 3940 Series...

  • Page 56: Electrical Schematics

    Section 8 Electrical Schematics Thermo Electron Corporation Model 3940 Series...
  • Page 57 Section 8 Electrical Schematics Model 3940 Series Thermo Electron Corporation...
  • Page 58 Section 9 Electrical Schematics Thermo Electron Corporation Model 3940 Series...
  • Page 60 Section 9 Electrical Schematics Model 3940 Series Thermo Electron Corporation...
  • Page 61 Section 9 Electrical Schematics Thermo Electron Corporation Model 3940 Series...
  • Page 62 Section 9 Electrical Schematics Model 3940 Series Thermo Electron Corporation...
  • Page 64 At Thermo's option, all non-conforming p art s must be returned to Thermo Electron Corporation post age p aid and replacement p art s are shipped FOB destination. THIS W ARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER W ARRANTIES, WHETHER WRITTEN, ORAL OR IMPLIED.
  • Page 65 THERMO ELECTRON CORPORATION INTERNATIONAL DEALER WARRANTY The W arranty Period st art s two months from the date your equipment is shipped from our facility . This allows for shipping time so the warranty will go into ef fect at approximately the same time your equipment is delivered. The warranty protec- tion extends to any subsequent owner during the first year warranty period.
  • Page 66 INSTALLATION, OPERATION AND SERVICE INSTRUCTIONS FOR CIRCULAR CHART RECORDERS RECORDERS, INC. CAUTION: IT IS IMPORTANT THAT THESE INSTRUCTIONS BE READ BEFORE INSTALLING THE INSTRUMENT. KEEP THESE INSTRUCTIONS ON FILE FOR FUTURE REFERENCE. RECEIVING INSPECTION UNPACKING As soon as the recorder is received, visually inspect Each recorder is shipped with the standard accessory the shipping container for signs of damage.
  • Page 67 RECORDER CASE LOCATION information concerning the connection of the probe to the recorder. Upon unpacking, find a suitable location to mount the This recording unit is capable of accepting input from unit before plugging it in. After the recorder has been either a CURRENT source (such as 4-20mA), a connected to the main AC power supply, connect the VOLTAGE source (such as 0-1 Volt, 0-5 Volts, 1-5...
  • Page 68 Next, you will need to determine the type of micro- processor controller PC board that is installed in your recorder. Refer to Figures 1A, 1B and 1C and compare these figures to the microprocessor controller PC board that is installed in your recorder. TYPE "A"...
  • Page 69 CHANGING THE CHART PAPER out, the pen color will become lighter. This indicates that the pen should be replaced. Press and hold the "change chart" button (#3) for REPLACEMENT OF PEN approximately one (1) second until the pen begins to move to the left of the chart and then release the button.
  • Page 70 should briefly stop at the outer most temperature 2a. For two (2) pen recorders, also compare the graduation of the chart before continuing onto the second thermometer's reading to the second pen of chart to begin recording. If the pen does not stop the recorder.
  • Page 71 BATTERY LOCATION chart plate to expose the relay that is mounted to the back of the chart plate. Otherwise, your recording unit AND REPLACEMENT will have a hinged chart plate held in place by two (2) screws located in the upper and lower right hand 4", 6"...
  • Page 72 Press and hold the "change chart" button (#3) until the This recording unit has the option for the user to select pen arm begins to move off of the chart and then from several temperature "ranges" that release the button. Wait until the pen has moved programmed into the recorder.
  • Page 73 right arrow button (#2) to decrease the range number RECORDER SPECIFICATIONS that is selected for the recorder. When you have finished selecting the range, press and hold the INPUT "change chart" button (#3) until the pen begins to Nominal Input Voltage: Single Phase 115/230VAC. move back onto the chart and the selected range will Nominal Input Current: 40mA/20mA be saved into the recorder's permanent memory.
  • Page 74 Figure 6A: Recorder Assembly “Type A” (Rear View). Figure 6B: Recorder Assembly “Type A” with Electric Contact Option (Rear View). R70-32 (WEB) REV(12-04) D...
  • Page 75 Figure 6C: Recorder Assembly Type “B” (Rear View). Figure 6D: Recorder Assembly Type “C” (Rear View). R70-32 (WEB) REV(12-04) D...
  • Page 76 Figure 7: 6” Recorder Case Dimensions. R70-32 (WEB) REV(12-04) D...
  • Page 77 Figure 8: 8” Recorder Case Dimensions. For all physical dimensions and panel cut-out dimensions for skeleton and skeleton with door recorders, please contact C Recorders, Inc. GUARANTEE: COBEX products are warranted to be of good workmanship and quality and free from defects under normal use and service. This warranty is limited to repairing such defects, provided return is made prepaid to COBEX Recorders, Inc., Coconut Creek, Florida within one (1) year after delivery to the original purchaser.
  • Page 78 Thermo Electron Corporation Controlled Environment Equipment 401 Millcreek Road Marietta, Ohio 45750 United States www.thermo.com...

This manual is also suitable for:

3911391339403949

Table of Contents