WATERJACKET CO2
INCUBATORS
WITH MICROPROCESSOR CONTROL
MODELS: 3517, 3517J, & 3524
INSTALLATION AND OPERATION MANUAL
Sheldon Manufacturing Inc. P.O. Box 627 Cornelius, Oregon 97113
EMAIL: tech@Shellab.com INTERNET: http://www.Shellab.com/~Shellab
1-800-322-4897 (503) 640-3000 FAX (503) 640-1366
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TABLE OF CONTENTS
SECTION 1.0 RECEIVING AND INSPECTION
SECTION 2.0 GRAPHIC SYMBOLS
SECTION 3.0 INSTALLATION
SECTION 4.0 CONTROL PANEL OVERVIEW
SECTION 5.0 OPERATION
SECTION 6.0 DATA LOGGER FUNCTION
SECTION 7.0 FYRITE CO CHECKING
SECTION 8.0 HEPA C02 FILTER
SECTION 9.0 MAINTENANCE
SECTION 10.0 TROUBLESHOOTING
SECTION 11.0 PARTS LIST
UNIT SPECIFICATIONS
SCHEMATICS
REV 04/08
4861607
These units are CO Water Jacketed incubators for professional, industrial or educational
use where the preparation or testing of materials is done at approximately atmospheric
pressure and no flammable, volatile or combustible materials are being heated. These
units are not intended for hazardous or household locations or use.
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INTRODUCTION
Thank you for choosing a water jacket incubator. These units are not intended for use at
hazardous or household locations.
Before you use the unit, read this entire manual carefully to understand how to install,
operate, and maintain the unit in a safe manner. Your satisfaction with the unit will be
maximized as you read about its safety and operational features.
Keep this manual on-hand so it can be used by all operators of the unit. Be sure all
operators of the unit are given appropriate training before you put the unit in service.
Note: Use the unit only in the way described in this manual. Failure to follow the
guidelines and instructions in this manual may be dangerous and illegal.
General Safety Considerations
Your incubator and its recommended accessories have been designed and tested to
meet strict safety requirements.
For continued safe operation of your incubator, always follow basic safety precautions
including:
Read this entire manual before using the incubator.
Be sure you follow any city, county, or other ordinances in your area regarding the use
of this unit.
Use only approved accessories. Do not modify system components. Any alterations or
modifications to your incubator may be dangerous and will void your warranty.
Always plug the unit’s power cord into a grounded electrical outlet that conforms to
national and local electrical codes. If the unit is not grounded, parts such as knobs
and controls may conduct electricity and cause serious injury.
Do not connect the unit to a power source of any other voltage or frequency beyond
the range stated on the power rating on the dataplate inside the door of the unit.
Do not modify the power cord provided with the unit. If the plug does not fit an outlet,
have a proper outlet installed by a qualified electrician.
Avoid damaging the power cord. Do not bend it excessively, step on it, place heavy
objects on it. A damaged cord can easily become a shock or fire hazard. Never use a
power cord after it has become damaged.
Do not position the equipment in such a manner as to make it difficult to disconnect
power cord or coupler.
Do not attempt to move the unit while in operation or before the unit has been allowed
to cool.
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Section
1
RECEIVING AND INSPECTION
IMPORTANT: READ THIS INSTRUCTION MANUAL IMMEDIATELY!
Your satisfaction and safety require a complete understanding of this unit, including
its proper function and operational characteristics. Be sure operators are given
adequate training before attempting to put the unit in service. NOTE: This equipment
must be used only for its intended application; any alterations or modifications will
void your warranty.
1.1 Inspection: The carrier, when accepting shipment, also accepts responsibility for
safe delivery and is liable for loss or damage claims. On delivery, inspect for visible
exterior damage, note and describe on the freight bill any damage found and enter
your claim on the form supplied by the carrier.
1.2 Inspect for concealed loss or damage on the unit itself, both interior and exterior. If
any, the carrier will arrange for official inspection to substantiate your claim. Save the
shipping crate until you are sure the unit has been delivered in good condition.
1.3 Return Shipment: If for any reason you must return the unit, contact your customer
service representative for authorization and supply nameplate data. For information
on where to contact Customer Service please see the manual cover.
1.4 Accessories: Make sure that all of the equipment indicated on the packing slip is
included with the unit. Carefully check all packaging before discarding. Each
chamber comes equipped with 3 shelves, 4 shelf standards, 1 humidity pan and a
power cord. Each chamber of the 3517J comes equipped with 5 shelves, 4 shelf
standards, 1 humidity pan and a power cord. All units are shipped with 4 leveling
feet and supply hose kit.
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GRAPHIC SYMBOLS
Section
2
Your incubator has been provided with a display of graphic symbols which is designed to
help in identifying the use and function of the available user adjustable components.
2.1 Indicates that you should consult your manual for further description or
discussion of a control or user item.
2.2 Indicates "Temperature".
2.3 Indicates "Over-temperature safety".
2.4 C Indicates "Degrees Centigrade".
2.5 CO
2.6 Indicates "Gas" (CO2 for this unit).
2.7 Indicates "AC Power ".
2.8 Indicates "Water Jacket Low".
2.9 Indicates "ON/I" and "OFF/O".
2.10 Indicates "Relative Humidity".
2.11 %RH Indicates "Percent Relative Humidity".
2.12 Indicates "Potential Shock Hazard" behind this protective partition.
2.13 Indicates "Protective Earth Ground".
Indicates "Carbon Dioxide".
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2.14 Indicates “Unit should be recycled” (Not disposed of in land-fill)
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INSTALLATION
Section
3
Local city, county, or other ordinances may govern the use of this equipment. If you have any
questions about local requirements, please contact the appropriate local agency. Installation may be
performed by the end user.
Under normal circumstances this unit is intended for use indoors, at room temperatures between 5
and 40C, at no greater than 80% Relative Humidity (at 25) and with a supply voltage that does not
vary by more than 10%. The unit’s technical and environmental specifications includes: altitude not
exceeding 2000 m operating and Pollution Degree of 2. Customer service should be contacted for
operating conditions outside of these limits.
CAUTION: Make sure that the incubator is located in its intended position and level before
filling the water jacket. Directions for filling the jacket are in Section 5.2.
3.1 Power Source: The unit power requirements are listed on the data plate. PLUG THE UNIT
INTO A PROPERLY GROUNDED AND RATED RECEPTACLE OF THE CORRECT
STYLE. A separate circuit is recommended for this unit to prevent loss of product due to
overloading or circuit failures caused by other equipment. The power supply must be
properly grounded (earthed) and correctly sized to match the unit nameplate rating. The
supply voltage must match the nameplate voltage within +/- 10%. The US market units
are designed for 110 volts @ 60 Hz, 5 Amps. The EU market units are designed for 220
volts @ 50 Hz, 3.5 Amps. If supplied with a detachable cord set, plug the female end into
the inlet on the unit and the male plug into the supply. Assure that units requiring fuses
have them installed. The fuse is a T type, 10 amp for 110 vol units, 6.3 amp for 220 volt
units. This fuse may be at the inlet or a part of the cord set male plug. The unit must be
located to easily allow for it to be unplugged or disconnected.
3.2 Location: When selecting a site for the unit, consider conditions which may affect
performance, such as heat from steam radiators, ovens, autoclaves, etc. Avoid direct sun,
fast-moving air currents, heating/cooling ducts, and high-traffic areas. To ensure air
circulation around the unit, allow a minimum of 10cm of clearance between the incubator
and surrounding walls, or obstructions to free air flow.
3.3 Lifting / Handling: These units are heavy and care should be taken to use appropriate
lifting devices that are sufficiently rated for these loads. Units should only be lifted from their
bottom surfaces. Doors, handles and knobs are not adequate for lifting or stabilization. The
unit should be completely restrained from tipping during lifting or transport. All moving parts,
such as shelves and trays should be removed and doors need to be positively locked in the
closed position during transfer to prevent shifting and damage.
3.4 Leveling: The unit must sit level and solidly. Leveling feet are supplied and must be
installed in the four holes in the bottom corners of the unit. With the feet installed and the
unit standing upright, each foot can be raised by turning it in a counterclockwise direction.
Adjust the foot at each corner until the unit stands level and solid without rocking. If the unit
must be moved, drain all of the water from the unit and turn the leveling feet in (clockwise)
all the way to prevent damage while moving.
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3.5 Cleaning: The unit chamber should be cleaned and disinfected prior to use. The
operating conditions and appropriate protocol will determine the correct procedure for
decontamination. A typical decontamination procedure that is adequate for many
situations has been described below. As well, certain steps are listed that will help reduce
the likelihood of contamination and the necessity of decontamination. Whatever process
is appropriate, it needs to be done on a regularly scheduled basis. Depending on usage
and protocol, this may be monthly, quarterly or otherwise. Regardless of the
decontamination procedure used, certain precautions will need to be taken:
A. Always disconnect the unit from the electrical service when cleaning. Assure all
volatile or flammable cleaners are evaporated and dry before reconnecting the unit
to the power supply.
B. Special care should be taken when cleaning around sensing heads to prevent
damage.
C. If you use chlorine-based bleaches or abrasive cleaners this will modify the
stainless steel interior finish. DO NOT USE hard tools such as metal wire brushes
or steel wool. Use non-abrasive cleaners and soft tools such as plastic brushes.
D. In the event hazardous material is spilled onto or into the equipment, appropriate
decontamination must be carried out. If there is any doubt about the compatibility
of decontamination or cleaning agents with parts of the equipment or with material
contained, please contact the manufacturer or his agent. No decontamination or
cleaning agents should be used which could cause a hazard as a result of a
reaction with parts of the equipment or with the material contained in it.
TYPICAL DECONTAMINATION PROCEDURE
1. Remove the humidity pan every week and autoclave, or wash with soap and water
then disinfect with 70% alcohol solution. Replace in the incubator with fresh,
DISTILLED water.
2. Flush the sample port tubing with 70% alcohol solution. Replace any lines that
have a green color.
3. Remove the door gaskets, clean and disinfect. Clean and disinfect all mounting
grooves for the door gaskets.
4. Remove all shelves, shelf supports, shelf standards and shields. Autoclave, or
wash and disinfect as described in item 1.
5. Wash and disinfect all interior surfaces.
6. Give special attention to cleaning and disinfecting all access ports, air bleeds,
shaft holes, electrical pass-through and any other passages into the chamber.
7. Replace all air and CO2 filters every six months or when noticeably dirty on the
upstream side. CO2 filters are located in the shadow box just behind the GAS IN
fitting and in line with the CO2 tubing kit. Units with flow meters require operatorsupplied air pumps. These pumps should be checked for proper air filtering.
OPERATION FOR MINIMIZING CONTAMINATION
1. Keep the outside of the incubator, including the air in the laboratory, as clean as
possible. This is particularly important for units placed directly on the floor. Do
not place incubators near doors, air vents or other areas of high air movement or
traffic.
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2. The floor around the unit needs to be clean. Units that are placed on the floor
should be mounted higher – typically on a caster platform – for ease of moving the
unit during cleaning and access to the back of the unit.
3. Minimize the number of times access is made to the chamber during normal
operation.
4. Do not depend on the use of antibiotics to maintain uncontaminated conditions, as
this is an inadequate technique for sterilization. Preferably use aseptic techniques
as described above for maintaining sterile conditions in the incubator.
3.6 Shelves and Interior Parts: Shelving, shelf supports and a humidity pan are supplied with
each unit. See Figure 1, for proper placement of these accessories.
Figure 1
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CONTROL PANEL OVERVIEW (See Figure 2)
Section
4
All controls are located on the front panel. Units with a detachable cord have a fused inlet
located at the top rear of the control panel. This inlet has a recessed male plug, fuse and
an EMI filtering system designed to filter out electrical interference. This inlet also prevents
any internally generated interference from feeding out to the power grid.
4.1 Power Switch: The I/O (ON/OFF) switch controls all of the power for the incubator
and must be in the I/ON position before any systems are operational. Both
temperature and CO2 displays will illuminate when the power switch is in the ON
position.
4.2 Water Low Light: This pilot lamp is on whenever the internal water jacket float
switch has been tripped to the closed position. When the water drops low enough
the float switch closes the circuit turning on the indicator light.
4.3 Over Temperature Light: This pilot lamp is on whenever the Over Temperature
Safety thermostat has been activated and taken control of the element. During
normal operating conditions this indicator should never be on.
4.4 Main Temperature Control: This controller is marked in C and indicates the
actual temperature within the chamber to .1C. The UP/DOWN buttons are used for
imputing the set point, calibrating the display, and muting or unmuting the audible
alarm. The HIGH and LOW alarm indicators will light whenever there is an alarm
condition associated with the temperature within the chamber. The MUTE indicator
will light whenever the audible alarm has been deactivated. Some alarm conditions
have a delay programmed in.
4.5 Heating Light: This pilot lamp is on whenever the Temperature Controller is
activating the heating element.
4.6 CO2 Control on Water Jacket Incubators: The controller is marked “CO2 %”
and has a resolution of .1 %. It has an up and down arrow that is used for
imputing CO2 set points, calibrating the CO2 concentration level, and muting or
unmuting the audible alarm. It also has three led indicating lights for alarm
conditions, one for high CO2 levels, one for low CO2 levels, and one for alarm
mute. On some older model the up and down arrows can also be used to reset the
control integrator value. On newer Models it isn’t necessary, but can be done also.
4.7 Injection Light: This pilot lamp is on whenever the CO2 controller is injecting CO2
into the chamber.
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4.8 Humidity Display: This digital display is marked %RH and indicates the relative
humidity in the chamber.
4.9 Datalog Communications Interface: This controller provides six (6) parameters to
externally log data of all the front panel displays. The MODE button is used to select
the parameter, and the UP/DOWN buttons are used to change the parameter's
value.
4.10 Over Temperature Safety Control (OTP): Located front left of the control panel,
this is a hydraulic thermostat that is wired between the Main Temperature Controller
and the heating element and functions as an override control. If at any time the
Main Temperature Control fails in the ON position and the temperature in the
chamber rises above its set point, the OTP is activated and maintains temperature
at its own set point. Note that the HEATING indicator will continue to function under
the control of the OTP.
4.11 Interface Ports: Located on the front left of the control panel opposite the Over
Temperature Safety, these three (3) ports are where the logged data can be
externally accessed through serial and parallel functions.
4.12 CO2 Sample Port: This is located on the front left side of control panel. A sample
can be drawn to measure the CO2 content in the chamber at this port.
Figure 2
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OPERATION
Section
5
READ THIS SECTION IN ITS ENTIRETY BEFORE ATTEMPTING OPERATION!
IMPORTANT: In order to ensure the proper operation of this incubator, it is essential
that you regularly verify the accuracy of the temperature and CO2 controls.
Temperature can be confirmed by use of a thermometer inside of the chamber. CO2
can be confirmed with the use of a Fyrite Gas Analyzer or other equipment such as a
gas chromatograph. These must be checked at least on a weekly basis. Any
questions should be directed to a technical service representative.
5.1 Power up the unit by attaching the cordset (supplied with the accessories) to the unit
inlet and the building power supply. Verify that the power fuses are installed.
Attach the female end of the cordset into the fused and recessed male plug on the
rear of the unit and the male plug end of the cordset into the building supply
receptacle. Turn the power switch to the I/ON position.
5.2 Filling and Draining: The front panel of the incubator has a WATER LOW warning
light. Fill the water jacket with water by means of the fill port located at the top right
rear of the unit marked FILL WJ HERE. Stop filling when the WATER LOW warning
light goes off. When full, the unit holds approximately 19 U.S. gallons (72 liters). To
drain the unit, hook a suitable hose to the siphon tube marked SIPHON HERE
located to the left of the fill port. Start a siphon and allow unit to empty into a suitable
service drain or catchment area.
WATER RECOMMENDATIONS FOR USE IN WATER JACKET INCUBATORS
The addition of a dis-similar metal anode in Water Jacket incubators will allow the
use of good-quality tap water to fill the Jacket. The anode is located in a threaded
port near the fill port on the rear of the unit. The anode will dissolve as it is in
contact with mineral salts or dissolved gasses in the tap water. The anode should
be removed and checked for erosion every year. When the anode appears to be
over 50% eroded, a new one should be purchased form Sheldon Mfg., Inc.
(Replacement Part #0260500)
Tap water with a hardness of more than 30 parts per million (PPM) or 1.5 grains
per gallon (GPG) will require assessment of the anode on a yearly basis.
Dissolved gasses should be no more than 120 PPM or 7 GPG. The Ph of the
water should test to between 6.0 and 8.5.
When in doubt, it is advisable to use DISTILLED WATER ONLY.
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5.3 Setting the Controls: Important: the incubator must be stable at desired
temperature and humidity before CO2 is supplied. The CO2 set point must be set
to the OFF position during the stabilization period.
To set the Temperature Set Point push one of the up or down arrows once. The
display should start blinking “SP”. While plinking push the Up or Down arrow to
move the Set Point up or down to the desired Set Point. Release the button and
when the display stops blinking it will return to the actual temperature.
To set the OTP Control, set your Main Temperature Control one degree higher
than your desired temperature and turn the OTP Control all the way clockwise.
After the incubator has stabilized turn the OTP Control counterclockwise slowly
until you see the red OTP Indicating Light starts to flash illuminate with the Heating
Indicating Light. Then reset the Temperature Control back to your desired Set
Point.
To mute the audible alarm on either the Temperature or the CO2 Controls, push
one of the up or down arrows and hold it down until the yellow led light illuminates
and the audible alarm silences. While the incubator is warming, the low alarm will
activate within 15 minutes.
To set the CO2 Control Set Point, push one of up or down arrows once. The
display should start blinking “SP”. While blinking push the Up and Down arrow to
move the Set Point up or down to the desired set point. Release the button and
when the display stops blinking it will return to the actual CO2 %.
On some older models where you may need to reset the integrator on the CO2
Control, push both up and down arrows simultaneously until the display start
blinking “CO”. Then push the down arrow until the display reads “CL” and release
the button. The control will return to normal operation after it stops blinking. This
procedure should only be done if you are having trouble with CO2 overshoot.
5.4 Calibrating the Controls:
A. Push and hold both the UP and DOWN buttons simultaneously until the control
displays CP (for temperature) or CO (for CO2) after the display will start to blink.
B. While the display is blinking the UP and DOWN buttons can be used to adjust
the display to match the actual condition in the incubator chamber.
C. If no buttons are pressed within five (5) seconds the blinking will stop and the
display will revert to showing the process or actual parameter within the incubator
chamber
5.5 Humidification: Humidification of the unit is achieved by evaporation of water from
the chamber humidity pan placed in the bottom of the incubator. By filling this
stainless steel reservoir pan with DISTILLED WATER ONLY and allowing this water
supply to heat and evaporate, near saturation humidity is obtained. Do not use
plastic, glass or other metals. Only 300 series stainless metals are acceptable for
this reservoir pan. Do not use corrosive chemicals including copper sulphate or
chlorine in the pan or chamber as damage may occur. Use Distilled Water Only.
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DO NOT USE DEIONIZED WATER!
Use of disinfecting chemicals in the pan can change the surface tension of the
reservoir water thus preventing evaporation and proper humidification of the
chamber. Water in the pan should be changed and the pan cleaned at least once a
week to help control contamination and to maintain proper surface tension.
5.6 Temperature Monitoring: To insure that the incubator is operating at the desired
temperature, an accurate temperature indicator such as a certified reference
thermometer should be placed in the incubator chamber. Try to place the
thermometer in the center of the chamber and spaced off the shelf (taping the
thermometer down to a petri dish cover is a method that raises it off the shelf and
prevents it from rolling and hiding the scale from view). For ease of reading the
thermometer would be better if they were electronic with a remote display so they
could be read without opening the doors.
5.7 Initial Control Settings: Set controls to the set point you want your incubator to
operate at.
A. Set the OTP to its maximum position clockwise. After making initial
control settings allow the incubator to warm up and stabilize for 24
hours.
B. All units are shipped set for 37C and CO2 OFF. If other conditions are
desired follow the instructions in section 5.3 for resetting the controls.
5.8 Temperature Calibration: It is important that the calibration be performed in the
following order: Main temperature, and then the Over Temperature Safety.
A. During main temperature calibration it is important that the inner glass door
not be opened for any reason, and that the outer heated door is opened as
little as possible.
B. After the incubator has been running for 24 hours and the temperature
display is stable at the set point, read the temperature in the chamber from
the reference thermometer, and if necessary, recalibrate the display using the
instructions in section 5.4.
C. After the main temperature display has restabilized and maintained set point
for several hours, check the actual temperature again. If it does not match
the display repeat the calibration.
D. After the Main Temperatures are set and adjusted, the Overtemperature
Safety Control needs to be set. Do this by turning the OTP Control Knob
counterclockwise until the Overtemperature Light comes on (this will blink in
sequence with Heating Activated Light). Next, slowly turn the knob clockwise
until the light goes off, then turn the knob another 8 degrees approximately.
This should set the Overtemperature 1 degree above the Main Temperature
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set point.
5.9 CO2 Supply System and Control System: The CO2 system is rated for pressures
between 15 to 20 PSI which should never be exceeded at any time. Prior to any
attempt to hook up or run the CO2 control system, the water jacket must be filled and
the temperatures adjusted as noted in section 5.7.
Figure 3
A. The CO2 inlet fittings are located at the back of the unit near the top (see
figure three). They are marked CO2 TO CHAMBER. You have the option of
using one or two tanks. A supply hose with in-line CO2 filter (supplied with
your accessories) connects from each fitting to a CO2 tank and regulator. If
you plan to use only one tank, it does not matter which fitting you connect the
supply hose to, and the remaining fitting is left open. If you plan to use two
tanks, set the output pressure of one tank to 15 PSI and the other tank to 20
PSI. The internal tank switch will use up the 20 PSI first and then switch over
to the 15 PSI tank. It does not matter which tank is attached to which fitting.
When the 20 PSI tank is empty its output pressure gauge will indicate 15 PSI.
At this time the empty tank can be replaced. Note that there are no alarms
to indicate when the tanks are empty, so operators should monitor gas
consumption.
B. It is highly recommended that a good quality 0-60 PSI output range DUAL
STAGE pressure regulator be used on the CO2 tank. The dual stage
regulator will have two pressure gauges. The high pressure gauge (0-4000
PSI) will indicate the pressure within the tank. The low pressure gauge (0-60
15
PSI) will indicate the output pressure on the supply hose to the incubator. Do
not use single stage regulators. They will not supply a stable pressure. Just
because a regulator has two gauges does not mean that it is a dual stage
regulator. Insure that you are using a dual stage regulator.
C. It is normal for the high pressure gauge on your regulator to start out reading
800 to 1000 PSI with a full tank. The reading will drop to 500 to 800 PSI
quickly and will stay there for most of the duration of the tank. At the end of
use the pressure will drop quickly to zero to indicate that the tank is
completely empty. Pure CO2 is in a liquid state in the tank, and a constant
vapor pressure is generated in the tank above the liquid level. The CO2 is
drawn off of the top as a gas. The same vapor pressure is maintained as
long as any liquid is left in the tank. When the last of the liquid has
evaporated into gas then the pressure will drop rapidly as the gas is drawn
off.
D. Only medical grade CO2 should be used in your incubator. The use of any
lesser grade may damage your incubator and void your warranty.
E. The micro processor CO2 control system interprets the information from the
CO2 sensor, displays the CO2 concentration directly on the digital display,
reads the CO2 set point and controls the percentage of CO2 in the incubator
chamber.
F. The IR controlled unit is known as a direct sensor and operates under the
principal that a certain frequency of infrared light is absorbed by CO2. The
more CO2 is present the more light is absorbed. Its accuracy is consistent no
matter what the conditions are in the incubator. The IR controller utilizes an
infrared spectrophotometer to directly read the flow of CO2 gas into the
chamber.
G. It is recommended that the accuracy of your CO2 control system be
monitored by measuring the actual CO2 concentration on a weekly basis with
a Fyrite or other measuring device. This should be done when the chamber
has not been disturbed for an extended period of time, i.e. after the weekend,
or first thing on Monday morning.
5.10 Setting the CO2 Control: Attach the supply hose to the incubator and turn on the
CO2 supply. Set the CO2 control to the desired set point using the procedure
described in section 5.3.
5.11 Adjusting CO2 Display: After the incubator has had several hours to stabilize at
CO2 set point, measure the actual CO2% with a Fyrite. If there is any difference
between the Fryite and the display, use the procedure described in section 5.4 for
making the display matching the Fyrite. See Section 7.0 for Fyrite use.
NOTE: When using the Fyrite, insure that gas is not being injected while the
reading is being taken. Changing the CO2 set point to 0.0 prior to taking the
sample and change the set point back to the desired value after the use of the
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5.12 Audible Alarms: The temperature control and the CO2 control are both equipped
with visual and audible alarms.
Fyrite is finished.
A. Temperature Alarms: The temperature control has alarm indicators for high
and low conditions that are activated whenever the actual temperature is 1
above or below the set point.
B. CO2 Alarms: The CO2 controller has alarm indicators for high and low alarm
conditions that are activated whenever the actual CO2% is 1% above or
below the set point.
C. Audible Alarms: Both controls are equipped with audible alarms that are
activated when either of the HIGH or LOW indicators are activated. The
audible alarms can be muted for a single alarm occurrence by pressing and
holding down either the UP or DOWN button for several seconds until the
alarm mutes. There is a built in delay of approximately 15 minutes on the
occurrence of a LOW alarm. This time delay prevents the audible alarm from
activating every time the door is opened and the temperature and CO2 drops.
5.13 Description of nGS (NO Gas Warning) Function: (If equipped)
The CO2 Low alarm activates 15 minutes after the CO2 level drops more than 1%
below the set point. If the cause is not corrected in the next 5 minutes the CO2
display will flash nGS, indicating a no gas warning. nGS will continue to flash until
the CO2 level is within 1% of set point (or above 4% if the set point is 5%). The
audible alarm can be muted but the visual low alarm indicator will continue to be lit
and the display will continue to flash nGS until the low alarm deactivates. No
action is required by the user other than to correct the cause of the CO2 drop.
Note: It may take several hours after loss of gas before the CO2 low alarm comes
on. This depends on the unit’s natural rate of decay if no CO2 is injected. CO2 low
alarm does not activate until CO2 has fallen more than 1% of set point (or below
4% if set point is 5%).
Restore gas supply. Check CO2 tank and gas supply lines to the unit.
As soon as the gas supply is restored and the CO2 level rises to less than 1%
below set point (above 4.0% if set point is 5%) the display will stop blinking nGS
and will again show the sensor reading. No action is required by the user other
than correcting the cause of the drop in gas supply. The audible alarm can be
muted but the visual low alarm indicator will continue to be lit and the display will
continue to flash nGS until the low alarm deactivates.
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DATA LOGGER FUNCTION
Section
6
The data logger provides ways to externally indicate or log all the incubator front panel
displays at intervals ranging from 1 to 99 minutes. The logger contains a real time
clock/calendar to date and time stamp each logged reading.
The logger indicates and logs all front panel display readings in single lines of text. This
data is logged when the present logging interval has expired or one of the monitored
displays has changed its alarm state. Logged data has a time and date field that
corresponds with the logger’s real time clock.
This logged data can be externally accessed through ports provided on the front of the
incubator for serial and parallel functions, as well as a BNC contact closure plug for
extended alarm condition(s). The parallel port is compatible with any Epson or IBM style
printer. The serial port operates at 9600 baud with 8 data bits, 1 (one) stop bit and no
parity and connects with a computer through the (DB-9 DCE) RS232.
6.1 Program the Data Logger: Select the parameter to adjust by pressing and holding
the "MODE" button pad until the left two display digits show "LP" indicating the
logger has entered the set mode. The parameter that can be changed will blink and
its value can be changed by pushing the UP or DOWN arrow pads.
6.2 Pressing and holding the MODE pad for approximately one second will cause the
logger to step to the next parameter. The table on the following page shows the
indications for each parameter. If no buttons are pressed for fifteen (15) seconds,
the panel display will revert to the normal operation mode.
FRONT PANEL MODE
LEFT TWO DIGITS
RIGHT TWO DIGITS
COLON
NORMAL OPERATION
SHOW HOURS OF CURRENT 24 HR
TIME
SHOW MINUTES OF CURRENT
TIME
BLINK
SET LOGGING PERIOD
SHOW "LP"
BLINK LOGGING INTERVAL IN
MINUTES. CAN BE VERIFIED
FROM 0-99 MINUTES .
OFF
SET HOURS
BLINKS HOURS PORTION OF
CURRENT TIME. CAN BE VARIED
FROM 00 TO 23
ARE BLANK
ON
SET MINUTES
ARE BLANK
BLINK MINUTES PORTION OF
CURRENT TIME. CAN BE VARIED
FROM 0 TO 59
ON
SET DATE
ARE BLANK
BLINK DAY OF MONTH. CAN BE
VARIED FROM 1 TO 31
OFF
SET MONTH
BLINK CURRENT MONTH. CAN BE
VARIED FORM 1 TO 12
ARE BLANK
OFF
CURRENT YEAR
"19" OR "20"
BLINK LOWER 2 DIGITS OF YEAR
OFF
THE CONTROL PANEL DISPLAYS
SIX PARAMETERS, SHOWN BELOW, WHICH CAN BE CHANGED USING THE
CONTROL PANEL BUTTONS
6.3 The data logger clock has a back up battery. The recommended replacement is
Panasonic 3 Volt, 165 mA # BR2325 type 1HB, 1HC, OR 1HG.
19
FYRITE CO2 CHECKING
Section
7
A Bacharach FYRITE CO Gas Analyzer is recommended to measure CO concentrations
in the incubator chamber. This test instrument is not supplied with the incubator but is
readily available from your dealer. Follow the instructions provided with each Fyrite
instrument carefully to insure correct and accurate readings.
7.1. Press button on top of Fyrite canister to release CO2 concentration. Tip canister to
the side to ensure all fluid is released from top of canister.
7.2. Loosen screw on slide scale and align top of fluid with zero on the scale. Tighten
screw.
7.3. Connect hose and aspirator bulb to unit being tested. The sample port for
connection is located on the control panel.
7.4. Place the hose sampling cap directly over the plunger valve on top of canister and
depress firmly.
7.5. With button depressed, squeeze bulb 27 times. On the last squeeze and with bulb
still deflated, release hose from button.
7.6. Turn Fyrite canister upside down 3 times, each time allowing all fluid to flow to the
opposite end of the canister.
7.7. Tip canister to the 45 degree position to ensure all fluid has been released from top
of canister.
7.8. Read CO2 concentration in %.
NOTE: Your Fyrite indicator will come with a complete set of detailed instructions
which should be followed carefully. The fluid used inside this Fyrite instrument is
poisonous and corrosive and must not be taken internally. In the event of a spill or
accidental body contact with the Fyrite fluid, follow the instructions on the refill
bottle carefully.
20
HEPA C02 FILTER
Section
8
The Hepa filter attaches to a fixed
coupling ring with a direct “snap-in”
action. Push straight up to the coupling
ring to connect. Pull the filter straight
down to disengage. Replacement
Hepa filters is available from Sheldon
Mfg., Inc. Part Number 2800517.
The CO2 Incubator design features a HEPA filtration system with a patented copper housing. (Patent
Number 6,333,004) As the chamber air is drawn through the filter system, airborne microbes and isolated
particulates are not only removed from the air, but destroyed as well. It is through copper oxidation that the
contaminants are actually killed. The HEPA filter is easily replaced without the need of any tools and has an
efficiency rating of 99.97% at 0.3 microns.
Install the HEPA Filter onto the duct prior to installing the duct in the unit.
WARNING: Ensure that when installing the duct to ensure that the duct is not touching
the C02 sensor head as this may cause erroneous readings.
MAINTENANCE
Section
9
NOTE: Prior to any maintenance or service on this unit, disconnect the service
cord from the power supply.
9.1 Cleaning: Cleaning and decontamination are recommended on a regular basis.
9.2 Check CO2 supply periodically; don't let it run out. The internal auto tank switch is
9.3 CO2 supply lines and connections can be checked for leaks with a liquid soap
9.4 Keep the CO2 flow system free of impurities. Erratic CO2 control is usually
9.5 If the data logger fails to function as specified, check to verify that the port
9.6 There is no maintenance required on any controls. If the controls fail to operate as
9.7 Storage: If the incubator is to be turned off for any length of time, dry the chamber
To prepare the incubator for cleaning remove all interior parts such as the shelf
standards and false top. All stainless steel parts are autoclavable. If it becomes
necessary to pull out the Lab Stopper on the side of the unit (Part Number
102095), clean and reinstall the stopper from inside the chamber. Please review
the Cleaning procedures described in the Installation section for detailed
instructions.
not alarmed.
solution. Apply liquid soap solution to all areas of the supply line and observe for
bubbles that will indicate a leak.
traceable to the CO2 pressure regulator on the tank, impurities in the tank, or
impurities in the solenoid valve. Replace the CO2 in-line filters every six (6)
months or when the filters have become noticeably dirty on the upstream side.
There is a CO2 filter attached to the tubing kit, and one inside the shadow box
connected to the GAS-IN line.
connections are solid and not loose. If the data logger still fails to function properly
call Customer Service for assistance.
specified, please review Section 9.0 Troubleshooting, prior to contacting customer
service.
and humidity pan thoroughly and leave at room temperature. Failure to do this
may cause the interior to become contaminated. No adjustment to controls should
be required when restarting the unit. If the unit is to be shut down for transport,
drain the water jacket, remove humidity pan and shelves, dry the chamber and
disconnect the CO2 and power supply’s. See section 3.3, Lifting / Handling for
transport procedures.
TROUBLESHOOTING
TEMPERATURE
Temperature too high
1/ controller set too high-see section 5.3
2/ controller failed on – call Customer Service
3/ wiring error – call Customer Service
Display reads "HI" or "400"+
probe is unplugged, is broken or wire to sensor is broken –
trace wire from display to probe; move wire and watch
display to see intermittent problems
Chamber temp spikes over set point
and then settles to set point
recalibrate – see section 5.4
Temperature too low
1/ OTP too low – see section 5.8.E
2/ controller set too low – see section 5.3
3/ unit not recovered from door opening – wait for display to
stop changing
4/ unit not recovered from power failure or being turned off –
incubators will need 24 hours to warm up and stabilize
5/ element failure – see if heating light is on; compare
current draw to data plate
6/ controller failure – confirm with front panel lights that
controller is calling for heat
7/ OTP failure – confirm with front panel lights that it is
operating correctly
8/ wiring problem – check all functions and compare wiring
to diagram in section 10.0, especially around any areas
recently worked on
9/ loose connection – check shadow box for loose
connections
Display reads "LO"
1/ sensor is plugged in backwards – reverse sensor wires to
Section
10
CAUTION: Extreme caution must be exercised any time access is made into
areas housing electrical components. Repair, replacement or adjustment of
components in these areas must only be done by qualified technicians familiar
with electrical circuitry and the operation of the chamber.
Always make a visual inspection of the incubator and control console when
troubleshooting. Look for loose or disconnected wires or tubing, which may be the source
of the trouble.
NOTE: IF BREAKERS TRIP REPEATEDLY, OR FUSES BLOW REPEATEDLY, CALL
QUALIFIED SERVICE PERSONNEL.
23
controller
2/ if ambient room temperature is lower than range of unit –
compare set points and ambient temperature to rated
specifications in section 9.0
Unit will not heat over a temperature
that is below set point
1/ confirm that fan is moving and that amperage and voltage
match data plate – check fan motor motion in shadow box
and feel for air movement in chamber
2/ confirm that set point is set high enough ,turn OTP
counterclockwise and see if heating light or safety light
comes on
3/ check connections to sensor
4/ check calibration – using independent certified reference
thermometer, follow instructions in sections 5.4 and 5.8
Unit will not heat up at all
1/ verify that controller is asking for heat by looking for
controller light – if pilot light is not on continuously during
initial start up there is a problem with the controller
2/ check amperage – amperage should be virtually at
maximum rated (data plate) amperage
3/ do all controller functions work?
4/ is the OTP set high enough? – for diagnostics, should be
fully clockwise with the pilot light never on
5/ has the fuse/circuit breaker blown?
Indicated chamber temperature
unstable
1/ ±0.1 may be normal
2/ is fan working? – remove top panel and verify movement
of cooling fan in center of shadow box
3/ is ambient room temperature radically changing – either
door opening or room airflow from heaters or air
conditioning? – stabilize ambient conditions
4/ sensor miss-located, damaged, or wires may be damaged
- check mounts for control and OTP sensors, then trace
wires between sensors and controls
5/ calibration sensitivity – call Customer Service
6/ OTP set too low – be sure that OTP set point is more than
5 degrees over desired Main set point; check if OTP pilot is
on continuously; turn controller knob completely clockwise
to see if problem solved then follow instructions in section
5.8.E for correct setting.
7/ electrical noise – remove nearby sources of RFI including
motors, arcing relays or radio transmitters
8/ bad connection on temperature sensor or faulty sensor –
check connectors for continuity and mechanical soundness
while watching display for erratic behavior; check sensor
and wiring for mechanical damage
9/ bad connections or faulty capacitor – check connectors
for mechanical soundness and look for corrosion around
terminals or signs of arcing or other visible deterioration
Will not maintain set point
1/ assure that set point is at least 5 degrees over ambient
room temperature
2/ see if ambient is fluctuating
24
Display and reference thermometer
don’t match
1/ calibration error – see section 5.4
2/ temperature sensor failure – evaluate if pilot light is
operating correctly
3/ controller failure – evaluate if pilot light is operating
correctly
4/ allow at least two hours to stabilize
5/ verify that reference thermometer is certified
Can't adjust set points or calibration
1/ turn entire unit off and on to reset
2/ if repeatedly happens, call Customer Service
Calibrated at one temperature, but
not at another
This can be a normal condition when operating temperature
varies widely. For maximum accuracy, calibration should be
done at or as close to the set point temperature.
CO2 LEVEL
Overshoots set point but stabilizes
- display and Fyrite match
1/ turn set point up and down to see if solenoid valve works
by feeling and listening to valve
2/ recalibrate with Fyrite, see section 5.11 and section 7.0
3/ fan not operating correctly
a- fan motor stopped
b- fan blade fell off
c- wrong fan blade installed or mounted backwards
4/ wrong restrictor installed or missing altogether
5/ tank pressure too high, see section 5.9.A
6/ CO2 sensor partially plugged with dirt or condensation
7/ regulator set wrong, see section 5.9
8/ incubator too heavily loaded
9/ incubator being operated without shelving
10/ CO2 attached to sample port instead of “CO2 IN” fitting
12/ if display and Fyrite does not match, see Troubleshooting
Co2.
Overshoots set point and
continues to rise - display and
Fyrite match
1/ debris in solenoid causing it to leak continuously
2/ solenoid failed while open
3/ unit miss-wired
4/ controller output failed or shorted
5/ CO2 sensor or interface failure
6/ CO2 sensor plugged by debris or condensation
Rises very slowly
1/ restrictor partially plugged
2/ filter overly dirty or partially plugged
3/ CO2 tank regulator set too low, see section 5.9
4/ hose kinked or leaking
5/ poor door seal
6/ CO2 tank contains mixed gas, not 100% medical grade
CO2
Never rises
25
1/ CO2 tank empty
2/ solenoid failed while closed
3/ CO2 controller output failed while open
4/ restrictor plugged
5/ CO2 hose blockage
6/ CO2 filter plugged
7/ set point is at 0.0 and has not been reset, see section 5.3
and 5.4
Display and Fyrite reading do not
match
1/ calibration error - clear chamber for 12 hrs and confirm at
"0"
2/ turn set point up and down to see if solenoid valve works
by feeling and listening to valve
3/ assure that IR tube block is completely tight, 24 series
4/ if display is varying when doing Fyrite test, have a leak on
IR base or mounting plate, or CO2 is injecting at time of test.
5/ take voltage reading across sensor leads 0=0V and 20=1V
6/ assure that sensor is properly mounted
7/ DISPLAY LOWER THAN FYRITE: air leak around the CO2
sensor or the fan motor shaft
8/ DISPLAY HIGHER THAN FYRITE: leak in tube from sample
port to chamber, verify with liquid soap solution.
9/ DISPLAY HIGHER THAN FYRITE: Fyrite fluid worn out,
replace fluid with Fyrite refill.
10/ DISPLAY HIGHER THAN FYRITE: poor Fyrite sampling
technique, see section 6.0
11/ DISPLAY HIGHER THAN FYRITE: defective Fyrite pump or
tubing
12/ CO2 sensor, interface or controller failure
Is unstable – display or actual
reading varies around set point
1/ confirm that fan is working
2/ check for air leak around CO2 sensor or fan motor shaft
3/ magnetic field interference
4/ door not sealing properly
5/ atmospheric pressure fluctuations
6/ defective Fyrite pump or tubing
7/ CO2 entering chamber too quickly
a- tank pressure too high
b- regulator set wrong
c- restrictor incorrect or missing
8/ electronic problem with CO2 sensor, interface or controller
9/ top of unit exposed to cold air drafts
10/ unit being operated without shadow box cover
11/ electrical interference – atmospheric or conducted
12/ incubator too heavily loaded
Can't adjust set points or
calibration - "locked up"
1/ turn unit off and on to reset processor in controller
2/ if repeatedly happens, call Customer Service
Feeding continuously or
abnormally high CO2 usage
26
1/ do decay test: if more than 1% decay in an hour, check for
leak : door gasket tightness, motor inlet to chamber, sensor
or probe inlet to chamber, chamber access tube plugged
2/ check output signal from controller
3/ check solenoid valve for correct operation
4/ leak in plumbing including between regulator and CO2
tank
5/ door being opened too often
Won’t hold calibration – Fyrite
reading varies but display stable
1/ atmospheric pressure fluctuations
2/ top of unit exposed to cold air drafts
3/ unit being operated without shadow box cover in place
4/ condensation collecting on CO2 sensor
5/ CO2 sensor or interface failure
6/ unit incorrectly calibrated, see section 5.4
7/ taking Fyrite reading too soon after the door has been
opened
8/ air leak around CO2 sensor mounting plate
Low CO2 alarm activated and nGS
(NO Gas warning) flashing on CO2
display.
CO2 gas supply has been interrupted or run out.
Tank ran out of gas or did not switch over.
Pinched gas line tubing
Severe leak in gas line
Tubing is disconnected from the gas supply..
MECHANICAL
Door not sealing
1/ check physical condition of gasket
2/ confirm that door latch pulls door in tightly
3/ assure that gasket is in original location
Motor doesn't move
1/ if shaft spins freely: check connections to motor and check
voltage to motor;
2/ if shaft rubs or is frozen, relieve binding and retest
Motor makes noise
1) Make sure that the fan or blower wheel is not contacting its
housing. Adjust the motor mounting bracket position to re-center
the fan or blower wheel, if necessary.
2) Check the fan or blower wheel for damage or out of balance
condition. Replace the fan or blower wheel if it is damaged or out of
balance.
3) Turn the motor shaft to make sure that it spins freely. If it binds
or the bearings make a rubbing or scrapping sound then replace
the motor.
Solenoid valve buzzing
After removing solenoid clean with alcohol for carbon buildup then blow out. Check valve seat or channels for
contamination. Check CO2 filter and/or grade of CO2 used. If
seat is worn, replace.
OTHER
Controller on at all times - "lockedup"
27
1/ turn unit off and on to reset
2/ if cannot change any condition on the front panel, call
Customer Service
Front panel displays are all off
1/ Check for wire damage.
Unit or wall fuse/circuit breaker is
blown
1/ check wall power source
2/ compare current draw and compare to specs on data plate
3/ see what other loads are on the wall circuit
Unit will not turn on
1/ check wall power source
2/ check fuse/circuit breaker on unit or in wall
3/ see if unit is on, e.g., fan or heater, and just controller is off
4/ check all wiring connections, esp. around the on/off switch
Unit is smoking – Out of box
Put unit under vent and run at full power for one hour.
Contamination in chamber
1/ see cleaning procedure in Installation section 3.0
2/ develop and follow Standard operating procedure for
specific application; include definition of cleaning technique
and maintenance schedule.
NOTE: THE TEMPERATURE OF THE GLASS DOOR AND THE INTERIOR CHAMBER
WALLS MUST BE EQUAL TO PREVENT CONDENSATION.
The incubator is designed so that no internal electrical servicing should be required under
normal conditions. If electrical servicing is necessary, it should be performed by qualified
service personnel. FOR PERSONAL SAFETY, ALWAYS DISCONNECT THE POWER
BEFORE SERVICING.
28
PARTS LIST
Description
115V
220V
Fuse
3300516
3300515
Anode
0260500
0260500
CO2 Display Board
1750735
1750735
CO2 Filter
100199
100199
CO2 Pre-Heater
100909
103328
Cord Set
1800510
104192
Cord Set - European
NA
1800500
Data Logger
1750537
1750737
Door Heater
103068
103068
Door Switch
X1000022
X1000022
Element Coil
2350503
120071
Fan Blade
2600526
2600526
Fan Motor
4880508
4880507
Glass Door Latch
9530516
9530516
Gasket, 8 feet
3450648
3450648
HEPA Filter
2800517
2800517
Humidity Display
1750736
1750736
Humidity Pan
7930514
7930514
Humidity Sensor
9990623
9990623
IR Transmitter
8320510
8320510
Leveling Feet
2700506
2700506
Overtemperature Safety
100001
100001
Pod Control 4 Loop
1750725
1750725
Power Inlet Fuse
3300516
3300515
Power Inlet
104179
104179
Power Switch
7850532
7850532
Shelf
5121109
5121109
Solenoid Valve
8600528
8600529
Temperature Display Board
1750734
1750734
Water Level Switch
210004
210004
Section
11
* Must specify 220V-Jumpers on PCA must be reset from 115V to 220V.
29
UNIT SPECIFICATIONS
Weight
Shipping
Net
3517
280 lbs.
221 lbs.
3524
560 lbs.
442 lbs.
Dimensions
Exterior WxDxH
(IN.)
Interior WxDxH
(IN.)
3517
26.5 x 26 x 40
20.5 x 20 x 28
3524
26.5 x 26 x 80
20.5 x 20x28
each chamber
Capacity
Cubic Feet
3517
6.7
3524
6.7
each chamber
Temperature
Range
Uniformity
CO2
3517
Amb. 8C to 60C
+0.25C @ 37C
0 – 20%
3524
Amb. 8C to 60C
+0.25C @ 37C
0 – 20%
Model
Amp
Voltage
Hertz
3517
5 amp
110-120V
50/60 Hz
3517-2
3.5 amp
208-240V
50/60 Hz
3517J
5 amp
100V
50/60 Hz
3524
5 amp
110-120V
50/60 Hz
3524-2
3.5 amp
208-240V
50/60 Hz
30
FIGURE 6
WIRING DIAGRAM
3517, 3517J & 3524
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