Thermo Electron 3940 Series Operating instructions
Analyze • Detect • Measure • Control™
Model 3940 Series
Forma Environmental Chamber
Operating and Maintenance Manual
7043940 Rev. 7
Thermo Electron CorporationThermo Electron Corporation
MANUAL NUMBER 7043940
7 23451/IN-3294 4/6/06 Changed to 15, ±5 PSIG and specified range in required CO2pressure regulation ccs
6 22678/IN-3229 1/17/05 Remove 270129 from terminals 15 and 16 of temperature control aks
-- 22672/IN-3227 1/17/05 Revised steam generator wiring aks
5 22454/IN-3208 9/14/04 Watlow SD 4-20mA standard; new schematics, configuration sheet ccs
-- 22452/IN-3208 9/14/04 Added noise reducing filters to Watlow 982 controllers, new schematics ccs
4 22453/IN-3208 9/7/04 Updated FLA specs on drawings and specification page ccs
-- -- 8/18/04 Added Puregas dryer preventive maintenance ccs
3 -- 6/28/04 Reinstalled reference to Hold/Run key for silence on Watlow, corrected ccs
2 22337 5/11/04 Removed reference to Hold/Run key for silence on Watlow, chg pending ccs
1 22070/22129 1/29/04 Pre-programmed controller/changed thermal fuse aks
-- -- 1/26/04 Updated section 3.1.E dehumidification aks
-- 20843 11/20/03 Release 9 aks
REV ECR/ECN DATE DESCRIPTION By
Preface
Model 3940 Series i
Model Capacity
(cu. ft.) Voltage
3911 11 208-220
3913 11 220-240
3940 29 208-220
3949 29 220-240
Table 1. Models Covered in This Manual
Thermo Electron Corporationii Model 3940 Series Thermo Electron Corporation
Preface
Important Read this instruction manual. Failure to read, understand and follow the instructions in this manual
may result in damage to the unit, injury to operating personnel, and poor equipment performance. V
Caution All internal adjustments and maintenance must be performed by qualified service personnel. V
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.
©2003 Thermo Electron Corporation. All rights reserved.
Thermo Electron Corporation Model 3940 Series iiiThermo Electron Corporation
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Thermo Electron
has contracted with one or more recycling/disposal companies in each 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.
Always use the proper protective equipment (clothing, gloves, goggles, etc.)
Always dissipate extreme cold or heat and wear protective clothing.
Always follow good hygiene practices.
Each individual is responsible for his or her own safety.
Thermo Electron Corporationiv Model 3940 Series Thermo Electron Corporation
Preface
Thermo Electron Corporation Model 3940 Series vThermo Electron Corporation
Preface
Warranty Notes
Information You Should Know Before Requesting Warranty Service
•Locate the model and serial numbers. A serial tag is located on the unit itself and on the operating manu-
al shipped with the unit.
• For equipment service or maintenance, or with technical or special application inquiries, contact Technical
Services at 1-888-213-1790 or 1-740-373-4763 (USA and Canada). Outside the USA, contact your local distrib-
utor.
Repairs NOT Covered Under Warranty
• Calibration of control parameters. Nominal calibrations are performed at the factory; typically ±1°C for
temperature, ±1% for gases, and ±5% for humidity. Our service personnel can provide precise calibrations as
a billable service at your location. Calibration after a warranty repair is covered under the warranty.
• Damage resulting from use of improper quality water, chemicals or cleaning agents detrimental to
equipment materials.
• Service calls for improper installation or operating instructions. Corrections to any of the following are
billable services:
1) electrical service connection
2) tubing connections
3) gas regulators
4) gas tanks
5) unit leveling
6) room ventilation
7) adverse ambient temperature fluctuations
8) any repair external to the unit
• Damage resulting from accident, alteration, misuse, abuse, fire, flood, acts of God, or improper
installation.
• 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 CO2sensors, blower motors, water jackets, etc.
Model 3940 Series viThermo Electron Corporation
Table of Contents
Installation and Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Preliminary Cleaning and Disinfecting . . . . . . . . . . . . . . . . . . . . . . . .1-1
Installing the Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Leveling the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Connect Water Inlet for Humidity System . . . . . . . . . . . . . . . . . . . . .1-2
Alternate Water Supply for Humidity System . . . . . . . . . . . . . . . . .1-3
Connect Drain Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
4-20 Milliamp Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Set the Overtemp Safety Thermostat . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Set the Undertemp Safety Thermostat . . . . . . . . . . . . . . . . . . . . . . . .1-5
Cobex Recorder (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Change the Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Change the Pen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Honeywell Recorder (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
IR CO2Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Connect the CO2Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Set the CO2Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
CO2Control and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Start-Up and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Set the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Set the Operating Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Air Exchange Ventilator Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Heatless Dryer (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Section 1
Section 2
vii Model 3940 Series Thermo Electron Corporation
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Maintaining the Humidity Generator . . . . . . . . . . . . . . . . . . . . . . . .3-1
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Access Electrical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Over/Undertemp Probe and Thermostat . . . . . . . . . . . . . . . . . . . . . .4-1
Humidity/Temp Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Program Humidity/Temp Controllers . . . . . . . . . . . . . . . . . . . . . . . .4-3
Remove Mechanical Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Remove Software Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Controller Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Offset Calibration (Temp/Humidity) . . . . . . . . . . . . . . . . . . . . . . .4-5
Replace Optional Recorder and Probe(s) . . . . . . . . . . . . . . . . . . . . . .4-7
Calibrate the Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Set Door Heater Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
Clean/Adjust Steam Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
CO2Controller Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Refrigeration Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Table of Contents
Section 3
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9
Leveling the Unit
Model 3940 Series 1-1Thermo Electron Corporation
Section 1 Installation and Set-Up
Locate the unit on a firm, level surface in an area of minimum ambient
temperature fluctuation. A minimum of three (3) inches of clearance is
required at the top and back of the incubator. This space is necessary to
allow adequate airflow around the refrigeration system. At least eight (8)
inches clearance above the cabinet is required for service access.
Disinfect all interior surfaces with a general-use laboratory disinfectant.
Rinse thoroughly with sterile distilled water, then 70% ethanol. Dry with a
sterile cloth as needed.
Disinfect the shelf channels and shelves, then rinse with distilled water
before installing.
Caution Before using any cleaning or decontamination method except
those recommended by the manufacturer, users should check with the
manufacturer that the proposed method will not damage the equipment. V
Warning Accidental spills of hazardous materials on or inside this unit are
the responsibility of the user. V
The shelves may be installed at any level
in the incubator. Install a shelf channel
on each side. With the tabs pointing up,
attach the channel by locating the rivet
into a slotted hole, far end first. Pull the
channel toward the front and slide the
front rivet on the channel into the slotted
hole and press down. Make sure that the
channels are opposite each other so that
the installed shelf will be level.
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.
Installing the Shelves
Preliminary Cleaning
and Disinfecting
Figure 1-1. Install Shelf Channel
This manual suits for next models
4
Table of contents
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