Forma Scientific 3920 Operating And Maintenance Manual
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Forma Scientific 3920 Operating And Maintenance Manual

29 cu. ft. capacity reach-in incubator
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Model 3920
29 cu. ft. Capacity
Reach-In Incubator
Operating and Maintenance Manual
Manual No: 7013920 Rev. 3

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Summary of Contents for Forma Scientific 3920

  • Page 1 Model 3920 29 cu. ft. Capacity Reach-In Incubator Operating and Maintenance Manual Manual No: 7013920 Rev. 3...
  • Page 2 Model 3920 _________________________________________________________________________________ Read This Instruction Manual. Failure to read, understand and follow the instructions in this manual may result in damage to the unit, injury to operat- ing personnel, and poor equipment performance. CAUTION! All internal adjustments and maintenance must be performed by qualified service personnel.
  • Page 3 Model 3920 _________________________________________________________________________________ Important operating and/or maintenance instructions. Read the accompanying text carefully. Ce symbole attire l'attention de l'utilisateur sur des instructions importantes de fonctionnement et/ou d'entretien. Il peut être utilisé seul ou avec d'autres symboles de sécurité. Lire attentivement le texte d'accompagnement.
  • Page 4 Model 3920 _________________________________________________________________________________ Do You Need Information or Assistance on Forma Scientific Products? do, please contact us 8:00 a.m. to 7:00 p.m. (Eastern Time) at: If you 1-740-373-4763 Direct 1-888-213-1790 Toll Free, U.S. and Canada 1-740-373-4189 http://www.forma.com Internet Worldwide Web Home Page fservice@forma.com...

  • Page 5: Table Of Contents

    Section 3 - Control Panel Operation ....3 - 1 3.1 The 3920 Control Panel ..... . .3 - 1 3.2 Temperature Controller .

  • Page 6: Section 1 - Receiving

    A copper p-trap (Figure 2-1) is 1.3 Responsibility for Shipping Damage provided with the Model 3920 and must be installed. Attach vinyl tubing to the p- trap and route it to an open drain. For products shipped F.O.B. Marietta, Ohio, the responsi-...

  • Page 7: Setting The Overtemp Safety Thermostat

    Model 3920__________________________________________________________________Installation and Start-Up 2.6 Setting the Overtemp Safety Thermostat Allow the chamber temperature to stabilize, then set the overtemp safety thermostat as follows: 1. Turn the overtemp control knob slowly counterclockwise until the audible alarm sounds and the overtemp indica- tor lights.

  • Page 8: Section 3 - Control Panel Operation

    Model 3920 __________________________________________________________________Control Panel Operation Section 3 - Control Panel Operation Overtemp Safety Control, Indicator Light, and Audible Alarm (Figure 3-2) The overtemp safety thermostat should be set slightly above the operating temperature of the incubator. In the event of an overtemp condition, the overtemp safety thermostat will: •...

  • Page 9: Section 4 - Routine Maintenance

    Model 3920 ___________________________________________________________________Routine Maintenance Section 4 - Routine Maintenance 4.1 Cleaning the Incubator De-energize all potential sources of energy to this unit and lockout/tagout their controls. (O.S.H.A. Regulation, Section 1910-147.) The continued cleanliness of the stainless steel used in Forma products has a direct effect on the appearance and opera- Figure 3-3 tion of the unit.

  • Page 10: Section 5 - Service

    Model 3920 _______________________________________________________________________________Service 5.3 Replacing the Optional Recorder and Probe(s) Section 5 - Service 1. Open the incubator door, and locate the probe mounting plate attached to the center of the right interior wall. Servicing must be performed by qualified service Remove the mounting plate.

  • Page 11: Calibration Offset

    Model 3920 _______________________________________________________________________________Service Procedure: 12. Reinstall the top assembly by reversing the above proce- 1. Remove all test material from the incubator chamber. dure. Exercise care particularly when: 2. All temperature-sensing probes are mounted on a probe- • Placing and aligning the sealer gasket on the 1/2” flange mounting bracket on the right side of the incubator on top of the chamber when lowering the top in place.

  • Page 12: Controller Configuration

    The controller has been pre-configured at the factory. A ref- erence copy of the Temperature Configuration record is includ- ed with the manual. The controller should not be re-configured with- out first consulting Forma Scientific, Inc., Service Department at 1-800-848-3080. 5 - 3...
  • Page 13 Model 3920 _______________________________________________________________________________Service Temperature Configuration 11/18/92 Rev. 2 5 - 4...
  • Page 14 Model 3920 _______________________________________________________________________________Service Temperature Configuration (continued) 5 - 5...

  • Page 15: Handling Error Codes On The Microprocessor

    Model 3920 _______________________________________________________________________________Service 5.7 Handling Error Codes on the Microprocessor Note: Microprocessor errors may originate from the follow- ing conditions: • Electrical noise • A noise event • Excess environmental moisture • Excess environmental temperature If error cause is not otherwise apparent, check for the following listed below.

  • Page 16: Section 6 - Specifications

    Model 3920 _________________________________________________________________________Specifications Temperature Alarm Section 6 – Specifications Sensor Thermostat Controller Thermostat Temperature Setpoint Analog reference dial Control ±0.3°C @ +25°C to +37°C Alarm Audible/visual Range 0°C (32°F) to +60°C (140°F) Sensor Fittings Drain Port 3/8” OD Copper Controller...
  • Page 17 Model 3920 ___________________________________________________________________________Parts List Section 7 - Parts List Stock No. Description Quantity 116000 Dec. Door Hinge, Top RH-RHS 116001 Dec. Door Hinge, Bottom RH-RHS 245215 Temperature Probe/Digital Control 250078 Delay Relay 3-300 Seconds 115V 250190 Contactor 2 Pole 25A 1...

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