Forma Scientific 3950 User manual

Forma Scientific, Inc.
*Refer to listing of models on page iv.
Millcreek Road, P.O. Box 649
Marietta, Ohio 45750
U.S.A.
Telephone: [phone]
Telefax: [phone]
_______________________________________
Models:
3950 and 3951
Reach-In CO2Incubator
29 cu ft capacity
Manual No. 7003950 Rev. 3
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.
CAUTION: All internal adjustments and maintenance
must be performed by qualified service personnel.
Refer to the serial tag on the
rear cover of this manual

FormaModel 3950 Series __________________________________________________
i
The material in this manual is for information purposes only. The contents and the product it
describes are subject to change without notice. Forma Scientifi, Inc. makes no representations
or warranties with respect to this manual. In no event shall Forma Scientific, Inc. be held
liable for any damages, direct or incidental, arising out of or related to the use of this manual.
MANUAL NO. 7003950
3 18843/SI-7759 2/00 Shaker support chg; casters w/o brakes, lg. feet ccs
2 18594/IN-2740 1/00 Updated exploded parts list drawings ccs
1 -- 11/99 Updates from 3960 release (common parts) ccs
-- -- 9/99 Clarified water requirements per J. Lang ccp
-- 18455/IN-2722 8/99 Updated specs, no UL on 3951 ccp
0 6/99 New manual ccp
REV ECR / ECN DATE DESCRIPTION BY

FormaModel 3950 Series ____________________________________________Safety
iii
General Safety Notes
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.
Wichtige Betriebs- und/oder Wartungshinweise. Lesen Sie den nachfolgenden
Text sorgfältig.
Importante instruccions de operacion y/o mantenimiento. Lea el texto
acompanante cuidadosamente.
Potential electrical hazards. Only qualified persons should perform procedures
associated with this symbol.
Ce symbole attire l’attention de l’utilisateur sur des risques électriques
potentiels. Seules des personnes qualifiées doivent appliquer les instructions et
les procédures associées à ce symbole.
Gefahr von Stromschlägen. Nur qualifizierte Personen sollten die Tätigkeiten
ausführen, die mit diesem Symbol bezeichnet sind.
Potencial de riesgos electricos. Solo personas das capacitadadas deben
ejecutar los procedimientos asociadas con este simbulo.
Equipment being maintained or serviced must be turned off and locked off to
prevent possible injury.
Risques potentiels liés à l’énergie. L’équipement en entretien ou en maintenance
doit être éteint et mis sous clé pour éviter des blessures possibles.
Geräte, an denen Wartungs- oder Servicearbeiten durchgeführt werden, müssen
abgeschaltet und abgeschlossen werden, um Verletzungen zu vermeiden.
El equipo recibiendo servicio o mantenimiento debe ser apagado y segurado
para prevenir danos.

FormaModel 3950 Series ____________________________________________Safety
iv
Hot surface(s) present which may cause burns to unprotected skin or to
materials which may be damaged by elevated temperatures
Présence de surface(s) chaude(s) pouvant causer des brûlures sur la peau non
protégée, ou sur des matières pouvant être endommagées par des températures
élevées.
Heiße Oberfläche(n) können ungeschützter Haut Verbrennungen zufügen oder
Schäden an Materialien verursachen, die nicht hitzebeständig sind.
Superficias calientes que pueden causar quemaduras a piel sin proteccion o a
materiales que pueden estar danados por elevadas temperaturas.
√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.
If the incubator is not used in the manner specified in
this operating manual, the protection provided by the
equipment design may be impaired.
Model CO2 Sensor* Voltage**
3950 T/C 100-120
3951 T/C 200-230
*T/C is a thermal conductivity sensor.
**All units are 50/60 Hz

FormaModel 3950 Series ___________________________________________Service
v
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:
1-740-373-4763 Direct
1-888-213-1790 Toll Free, U.S. and Canada
1-740-373-4189 FAX
http://www.forma.com Internet Worldwide Web Home Page
[email protected] Service E-Mail Address
If you
Our staff can provide information on pricing and give you quotations. We
can take your order and provide delivery information on major equipment items or make
arrangements to have your local sales representative contact you. Our products are listed on the
Internet and we can be contacted through our Internet home page.
Our staff can supply technical information about proper setup,
operation or troubleshooting of your equipment. We can fill your needs for spare or replacement
parts or provide you with on-site service. We can also provide you with a quotation on our
Extended Warranty for your Forma products.
Whatever Forma products you need or use, we will be happy to discuss your
applications. If you are experiencing technical problems, working together, we will help you
locate the problem and, chances are, correct it yourself...over the telephone without a service
call.
When more extensive service is necessary, we will assist you with direct factory trained
technicians or a qualified service organization for on-the-spot repair. If your service need is
covered by the warranty, we will arrange for the unit to be repaired at our expense and to your
satisfaction.
Regardless of your needs, our professional telephone technicians are available to assist
you Monday through Friday from 8:00 a.m. to 7:00 p.m. Eastern Time. Please contact us by
telephone or fax. If you wish to write, our mailing address is:
Forma Scientific, Inc.
Millcreek Road, PO Box 649
Marietta, OH 45750
International customers please contact your local Forma Scientific distributor.
Sales Support
Service Support


FormaModel 3950 Series ___________________________________________Contents
vii
Table of Contents
Section 1 - Installation and Start-Up
1.1 Incubator Front View ....................................................................................1-1
a. Incubator Side and Rear View ..................................................................1-2
1.2 Control Panel Keys, Displays and Indicators................................................1-3
1.3 Operation of the Keypad ...............................................................................1-4
1.4 Installing the Unit..........................................................................................1-5
a. Choosing the Location ..............................................................................1-5
b. Preliminary Cleaning and Disinfecting ....................................................1-6
c. Installing the Shelves................................................................................1-6
d. Leveling the Unit......................................................................................1-6
e. Attaching the Drain Lines ............................................................. 1-7
f. The Water Supply.......................................................................... 1-7
g. Filling the Humidity Reservoir.................................................................1-7
1. In-house Distilled Water Supply........................................... 1-7
2. Manual Method (Funnel) ...................................................... 1-8
3. Gravity Fill Method.............................................................. 1-8
h. Connecting To Electrical Power...............................................................1-8
i. Connecting The Co2Gas Supply..............................................................1-8
1.5 Incubator Start-Up.........................................................................................1-10
a. Setting The Operating Temperature ........................................................1-10
b. Setting the Overtemp Setpoint ................................................................1-10
c. Setting the CO2Setpoint..........................................................................1-11
Chart 1-1, Set Mode.............................................................................................1-12

FormaModel 3950 Series ___________________________________________Contents
viii
Section 2 - Calibration
2.1 Calibration Mode ..........................................................................................2-1
a. Calibrating the Temperature................................................................2-1
b. Calibrating the CO2System ................................................................2-2
Chart 2-1, Calibrate Mode ...................................................................................2-3
Section 3 - Configuration
3.1 Configuration Mode ......................................................................................3-1
a. Disabling the ADD WATER Alarm ...................................................3-1
b. Disabling All Audible Alarms ............................................................3-1
c. Setting an Access Code.......................................................................3-1
d. Setting a Low Temp Alarm Limit (Tracking Alarm)..........................3-2
e. Enabling Temp Alarms to Trip Relay Contacts ..................................3-2
f. Setting a Low CO2Alarm Limit (Tracking Alarm).............................3-2
g. Setting a High CO2Alarm Limit (Tracking Alarm)............................3-3
h. Enabling CO2Alarms to Trip Relay Contacts.....................................3-3
i. Setting a New Zero Number for New CO2 Sensors.............................3-3
j. Setting a New Span Number for New CO2Sensors............................3-4
k. Enabling The High Humidity Feature .................................................3-4
l. Selecting a Primary Tank with the Gas Guard Option ........................3-4
m.Enabling the Gas Guard System..........................................................3-5
n. Setting a System Address with the RS485 Option ..............................3-5
Chart 3-1, Configure Mode..................................................................................3-6
Section 4 - Alarms
4.1 Alarms............................................................................................................4-1
4.2 Sensor Fault ...................................................................................................4-2

FormaModel 3950 Series ___________________________________________Contents
ix
Section 5 - Maintenance
5.1 Cleaning the Incubator Interior .....................................................................5-1
5.2 Cleaning the Glass Door(s)...........................................................................5-2
5.3 Cleaning the Humidity Reservoir...................................................... 5-2
5.4 Replacing the Power Fuses ...........................................................................5-3
5.5 Discarding or Taking the Unit Out of Service ................................... 5-3
Section 6 – Options (Factory Installed)
6.1 Connections to External Equipment .............................................................6-1
a. Connecting the Remote Alarm Contacts .................................................6-1
b. Connecting the RS485 Interface..............................................................6-2
c. Connecting the Analog Output Boards ....................................................6-2
6.2 CO2Gas Guard .............................................................................................6-4
a. Connecting the GO2Gas Supplies...........................................................6-5
b. Activating the Gas Guard ........................................................................6-5
c. Operation of the CO2Gas Guard .............................................................6-5
6.3 Inner Doors ...................................................................................... 6-6
6.4 Shaker Support Shelves .................................................................... 6-6
Section 7 - Specifications
Section 8 - Spare Parts
Section 9 - Electrical Schematics
Section 10 - Warranty Information

FormaModel 3950 Series ______________________________Installation and Start-up
1-1
Section 1 - Installation and Start-Up
POWER SWITCH
TEMP/CO CONTROLS
2
¼” SAMPLE PORTCO
2
HEATED GLASS DOOR
DOOR LATCH
(4) ADJUSTABLE LEVELING FOOT
(4) CASTERS

FormaModel 3950 Series ______________________________Installation and Start-up
1-2
ACCESSORY
OUTLET
(
2
)
2.375 I.D. PORT
WITH HOLE PLUG
POWER INLET
CONNECTION
¼” FILTERED CO CONNECTION
2
REMOTE ALARM CONTACTS RJ-11
RS 485 CONNECTION RJ-11
OPTIONAL
1/4” MPT WATER INLET
3/8” FPT DRIP PAN DRAIN
WITH 3/8” MPT PLUG
3/8” MPT CHAMBER DRAIN
WITH 3/8” FPT PLUG
Figure 1-2
Side View
Figure 1-3
Back View

FormaModel 3950 Series ______________________________Installation and Start-up
1-3
1.2 Control Panel Keys, Displays and Indicators
1. Silence - Silences the audible alarm.
2. Alarm Indicator - Light pulses on/off
during an alarm condition in the
cabinet.
3. Mode Select Switch - Used to select
Run, Setpoints, Calibration and
System Configuration Modes.
4. Message Center - Displays system
status.
5. Mode Select Indicators -
Run: Run Menu
Set: Set Points Menu
Cal: Calibrate Menu
Config: Configuration Menu
6. Up and Down Arrows - Increases or
decreases the number values, toggles
between choices.
7. Enter - Stores the value into
computer memory.
8. Heat Indicator - Lights when power
is applied to the heaters.
9. Temp Display – Displays temperature
continuously
10. Scroll for Parameters Arrows -
Moves the operator through the
choices of the selected mode.
11. CO2 Inject Indicator - Lights when
CO2is being injected into the
incubator.
12. % CO2Display - Displays CO2
percentage continuously.
Silence M ode
System OK
36.9
4.9
Enter
R un Set C al C onfig H eat Tem p
In ject % CO
2
Scrollfo r P a ra m e te rs
2
3
4
56
7
89
12
11
10
Figure 1-2

FormaModel 3950 Series ______________________________Installation and Start-up
1-4
1.3 Operation of the Keypad
The Model 3950 Series Reach-In Incubator has four basic modes that allow
incubator setup: Run, Setpoints, Calibration and System Configuration.
Run is the default mode during normal operation.
Set is used to enter system setpoints.
Calibration is used to calibrate various system parameters.
Configuration allows for custom setup of various options.
The chart below shows the selections under each of the modes.
RUN SETPOINT CALIBRATION CONFIGURATION
Default Mode Temperature Temp Offset Audible
Overtemp CO2Cal Access Code
CO2 Temp Lo Alarm
Temp Relay
CO2Lo Alarm
CO2Hi Alarm
CO2Relay
CO2Z & S #’s
RH High On/Off
H2O Alarm On/Off
Tank Select
Gas Guard
RS485 Address
Basic Unit Displays
Option Displays

FormaModel 3950 Series ______________________________Installation and Start-up
1-5
Scroll for Parameters Arrows: Steps the operator through the
parameters of SET, CAL and CONFIG Modes. The right arrow goes
to the next parameter, the left arrow returns to the previous parameter.
Up Arrow: Increases or toggles the parameter values that have been
selected in the SET, CAL, and CONFIG Modes.
Enter: Must press Enter key to save to memory all changed values.
Down Arrow: Decreases or toggles the parameter values that have been
selected in the SET, CAL and CONFIG Modes.
Silence Key: Press to silence the audible alarm. See Section 4 for alarm
ringback times.
1.4 Installing the Unit
a. Choosing the Location
Units must be installed against a wall or similar structure. Maintain a
three inch clearance behind the incubator for electrical, water and gas
hook-ups.
•Locate the unit on a firm level surface capable of supporting the unit’s weight of
approximately 500 lbs.
•Locate the unit away from doors and windows and heating and air conditioning ducts.
b. Preliminary Cleaning and Disinfecting
Remove the shipping tape securing the screws to the sidewall of the chamber.
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.
This incubator weighs approximately 500 lbs. Have sufficient personnel
available when moving.

FormaModel 3950 Series ______________________________Installation and Start-up
1-6
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.
Accidental spills of hazardous materials on or inside this unit are the
responsibility of the user.
c. Installing the Shelves
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.
d. 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.

FormaModel 3950 Series ______________________________Installation and Start-up
1-7
e. Attaching the Drain Lines
NOTE: Drain connections on
the back of the unit are shipped
capped. If humidity is not
required, the caps should be left
on the drains.
•If the manual or gravity feed
method is used for humidity
in the cabinet, connecting the
drains is optional.
•If an in-house distilled water
supply is used to fill the
reservoir, it is recommended
that the drains be connected to
a floor drain.
f. The Water Supply
For best operation of the incubator, sterilized distilled, demineralized or de-ionized
water should be used in the humidity reservoir. Water purity should be in the resistance
range of 50K Ohm/cm to 1M Ohm/cm, or a conductivity range of 20.0 uS/cm to 1.0
uS/cm. Refer to ASTM Standard D5391-93 or D4195-88 for measuring water purity.
Distillation systems, as well as some types of reverse osmosis water purity systems,
can produce water in the quality range specified. Tap water is not recommended as it
may contain chlorine, which can deteriorate the stainless steel. Tap water may also have
a high mineral content, which would produce a build-up of scale in the reservoir. High
purity, ultra pure or milli-q water is not recommended as it is an extremely aggressive
solvent and will deteriorate the stainless steel. High purity water has a resistance of
above 1M Ohm to 18M Ohm. Even high purity water can contain bacteria and organic
contaminants. Water should always be sterilized or treated with a decontaminant, safe
for use with stainless steel as well as safe for the product, prior to being introduced into
the humidity reservoir.
The incubator is equipped with a liquid level float switch that detects low water
levels in the humidity reservoir and produces an alarm condition. As all applications do
not require humidity, this alarm can be disabled. To disable the ADD WATER alarm,
see Section 3.1a. If humidity is required in the current application, press the Silence key
on the control panel to mute the alarm while the humidity reservoir is being filled.
Back of Unit
Top View
of Fitting Connections
1/4” water inlet fitting
to 1/4” ID tubing
to in-house water supply shut-off valve
(30 PSIG max.)
Chamber
(Overflow)
Drain
Condensate
Drain
Water
Inlet
3/8” Elbow with P-trap (included)
to 3/8” ID hose to floor drain
(must be trapped)
Side View -
(’ must be
toward the floor)
P’
Floor
3/8” fitting
to 3/8” ID hose
(not included)

FormaModel 3950 Series ______________________________Installation and Start-up
1-8
g. Filling the Humidity Reservoir
1. In-house “distilled” water supply
All incubators provide a connection for using an in-house water supply. Connect a
low pressure (not more than 30 PSI) water line, equipped with a manual shut-off
valve, to the inlet fitting on the float valve reservoir. The 1/4” hose connection is
located on the rear of the incubator cabinet. With the water turned on, a float valve
inside the incubator regulates the water level in the humidity reservoir. When the
reservoir is full, a 10-second audible tone is heard and the ADD WATER message no
longer displays.
2. Manual method
This fill system
consists of a funnel
attached to the side
duct sheet and tubing
located inside the
incubator. Disinfect
the funnel and rinse
with sterile water
before using. This
funnel may be moved
to a preferred
location by unscrewing the well nuts and disconnecting it from the sidewall. Tighten
the nuts after relocation. The holes allotted for funnel use are slightly larger and in a
centralized area. See illustration.
To fill the reservoir, pour sterile distilled water (approximately 2.5 gallons) into
the funnel. When the float switch trips, a 10-second audible tone sounds and the
ADD WATER message no longer displays. Add 1 gallon after the 10-second tone is
heard.
Pour in sterile,
distilled water
Funnel Usage-
Center Front
Unit Sidewall
Distilled or de-ionized water used in the humidity reservoir must be
within a water quality resistance range of 50K Ohm/cm to 1M
Ohm/cm to protect and prolong the life of the stainless steel. Use of
water outside the specified range will decrease the operating life of
the unit and may void the warranty.

FormaModel 3950 Series ______________________________Installation and Start-up
1-9
3. Gravity feed method
An optional carboy water fill system is also available. The carboy option kit
includes an instruction sheet that details the installation of the system.
h. Connecting the Unit to Electrical Power
See the serial tag on the side of the unit for electrical specifications or refer to the
electrical schematics at the end of this manual.
Connect the incubator to a grounded, dedicated circuit.
The power cord connector is the mains disconnect device for the incubator.
Position the incubator so the unit can be easily disconnected.
Plug the provided power cord into the power inlet connector on the back of the
cabinet, then into the grounded, dedicated electrical circuit.
The 3950 Series also has an internal outlet located on the right side of the interior
back wall. This outlet is to provide power (230W maximum) to accessory equipment.
This outlet is not to be used when the temperature is above 40°C and the RH more
than 50%.

FormaModel 3950 Series ______________________________Installation and Start-up
1-10
i. Connecting the CO2Gas Supply
High concentrations of CO2gas can cause asphyxiation.
OSHA Standards specify that employee exposure to carbon dioxide in any 8-hour shift of
a 40-hour work week shall not exceed the 8-hour time weighted average of 5000 PPM (0.5%
CO2). The short-term exposure limit for 15 minutes or less is 30,000 ppm (3% CO2). Carbon
dioxide monitors are recommended for confined areas where concentrations of carbon
dioxide gas can accumulate.
This incubator is designed for CO2gas only. Connecting a flammable or toxic
gas could result in a hazardous condition.
Gases other than CO2should not be connected to this equipment. CO2gas cylinders have
a UN1016 label on the cylinder and are equipped with a CGA 320 outlet valve. Check the
gas cylinder for the proper identification labels. The CO2gas supply being connected to the
incubator should be industrial grade, 99.5% pure. Do not use CO2gas cylinders equipped
with siphon tubes. A siphon tube is used to extract liquid CO2from the cylinder, which can
damage the pressure regulator. Consult with your gas supplier to ensure that the CO2
cylinder does not contain a siphon tube. Gas cylinders should also be secured to a wall or
other stationary object to prevent them from tipping.
A two-stage CO2pressure regulator is required to be installed on the outlet valve of the
gas cylinder. Input pressure to the incubator must be maintained at 15 psig (103.4 kPa) for
proper performance of the CO2control system. A single stage CO2pressure regulator will
not maintain 15 psig (103.4 kPa) to the incubator as the pressure in the CO2cylinder
decreases; therefore, a two-stage regulator is recommended.
If higher purity CO2is desired inside the incubator (greater than 99.5% pure), the pressure
regulator should be constructed with a stainless steel diaphragm, along with specifying the
purity of the CO2from the gas supplier. Follow the manufacturer’s instructions to ensure
proper and safe installation of the pressure regulator on the gas cylinder.
Consult your facility safety officer to ensure that the equipment is installed in
accordance with the codes and regulations that are applicable in your area.
The CO2gas supply being connected should be industrial grade 99.5% pure and should not
contain siphon tubes. Install a two-stage pressure regulator at the cylinder outlet. The high
pressure gauge at the tank should have 0-2000 psig range. The low pressure gauge, at the
incubator inlet, should have a 0-30 psig range. Input pressure to the incubator must be
maintained at 15 psig (103.4 kPa).
Each tank should be connected to one incubator only.

FormaModel 3950 Series ______________________________Installation and Start-up
1-11
The incubator has serrated fittings on the back of the cabinet to connect the gas supply.
Refer to Figure 1-2. The fitting is labeled CO2Inlet #1 Tank. Make sure that the connections
are secured with clamps. Check all fittings for leaks.
For units having the CO2Gas Guard option, refer to Section 6.2.
1.6 Incubator Start-Up
With the incubator properly installed, connected to power, the humidity reservoir filled
and the unit connected to a gas supply, system setpoints can be entered. The following
setpoints can be entered in Set Mode: Temperature, Overtemperature and CO2. To enter Set
Mode, press the Mode key until the Set indicator lights. Press the right and/or left arrow
keys until the proper parameter appears in the message display center. See Chart 1-1 for
more detail.
a. Setting the Operating Temperature
This incubator has an operating temperature range of 10.0°C to 60.0°C, depending on
ambient temperature. It is shipped from the factory with a temperature setpoint of 10.0° C.
At this setting, all heaters and alarms are turned off. To change the operating temperature
setpoint:
1. Press the Mode key until the Set indicator lights.
2. Press the right arrow until “Temp XX.X” is displayed in the message center.
3. Press up/down until the desired temperature setpoint is displayed.
4. Press Enter to save the setpoint.
5. Press the Mode key until the Run indicator lights for Run mode or press the right/left
arrow keys to go to next/previous parameter.
Any equipment placed inside chamber must be rated for unit operating
temperature and humidity
b. Setting the Overtemp Setpoint
The independent overtemp system is designed as a safety to
protect the incubator only. It is not intended to protect or limit the
maximum temperature of the cell cultures or customer’s equipment
inside the incubator if an overtemp condition occurs.

FormaModel 3950 Series ______________________________Installation and Start-up
1-12
All Forma 3950 Series incubators are equipped with a secondary temperature
monitoring system to monitor the air temperature inside the cabinet. This system is designed
as a safety device to turn off all heaters in the event of a temperature control failure. The
temperature control point in the incubator will be approximately +1°C of the overtemp
setpoint.
The overtemp setpoint is set by the factory (default) at 40°C. However, the overtemp
can be reset over a range from 0.5°C above the operating temperature setpoint to 65°C.
If the incubator’s operating temperature setpoint is set above the overtemp setpoint, the
overtemp setpoint will automatically update to 1°C above the temperature setpoint. It is
recommended that the overtemp setpoint be maintained at 1°C over the operating
temperature setpoint.
To set the Overtemp setpoint:
1. Press the Mode key until the Set indicator lights
2. Press the right arrow until Otemp XX.X is displayed in the message center
3. Press up or down arrow until the desired Overtemp setpoint is displayed
4. Press Enter to save the setting
5. Press the Mode key until the Run indicator lights or press the right or left arrow to go to
the next or previous parameter.
c. Setting the CO2Setpoint
All CO2cells are calibrated at the factory at 37.0° C, medium humidity and 10%
CO2. Therefore, if a temperature setpoint of 37.0° C has been entered, the humidity
reservoir has been filled and the CO2control is set to run between 0-10%, the CO2
setpoint may be entered immediately. Otherwise, it is important to allow the unit 12 hours
to stabilize at the temperature setpoint before entering the CO2setpoint.
All models of the incubator have a CO2setpoint range of 0.0% to 20.0%. The
incubator is shipped from the factory with a CO2setpoint of 0.0%. At this setting, all CO2
control and alarms are turned off.
To change the CO2setpoint:
1. Press the Mode key until the Set indicator lights.
2. Press the right arrow until “CO2 XX.X” is displayed in the message center.
3. Press the up/down arrow until the desired CO2setpoint is displayed.
4. Press Enter to save the setpoint.
5. Press the Mode key until the Run indicator lights to go to Run mode or press the
right/left arrow keys to go to next/previous parameter.