Electron Microscopy Sciences

Electron Microscopy Sciences
Electron
Microscopy
Sciences
INSTRUCTION MANUAL
CAT. 63230-10 Oven Incubator
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
2
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 the operating personnel, and poor
equipment performance.
Caution
All internal adjustments and maintenance must be performed by qualified service
personnel.
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.
NOTE:
-
Always use the proper protective equipment
-
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
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
3
Contents
Introduction……………………………………………………………………………………………………………4
Specifications…………………………………………………………………………………………………………4
Unpacking and installation…………………………………………………………………………………………..5
Location……………………………………………………………………………………………………...5
Leveling……………………………………………………………………………………………………...5
Shelving……………………………………………………………………………………………………..5
Electrical connection……………………………………………………………………………………….6
Be advised…………………………………………………………………………………………………..6
Operation……………………………………………………………………………………………………………...6
Temperature control………………………………………………………………………………………..7
Maintenance………………………………………………………………………………………………………….7
Care and cleaning of stainless steel……………………………………………………………………...8
Some stainless guidelines to consider…………………………………………………………………...8
The pH factor………………………………………………………………………………………………..8
Special considerations……………………………………………………………………………………..8
Cleansing agents…………………………………………………………………………………………...9
Cleaning methods…………………………………………………………………………………………..9
Failure to heat……………………………………………………………………………………………..10
Part replacement procedures……………………………………………………………………………10
Replacing the thermostat………………………………………………………………………………...10
Replacing the power switch……………………………………………………………………………...11
Replacing the status lamp bulb assembly……………………………………………………………...11
Replacing the hi-limit thermostat………………………………………………………………………..11
Replacing the heater……………………………………………………………………………………..12
Replacing the blower wheel: Servicing…………………………………………………………………12
Replacing the blower motor……………………………………………………………………………...12
Temperature readout calibration………………………………………………………………………...13
Replacement parts and ordering procedures…………………………………………………………………....13
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
4
Introduction
Thank you for selecting Electron Microscopy Sciences’ products for your equipment needs.
Electron Microscopy Sciences’ Oven Incubators are designed for use in industry, hospitals, school
laboratories; wherever there is a need for economical and reliable ovens for drying, sterilizing, baking,
evaporating and similar type work.
A hydraulic thermostat provides reliable temperature control with a range from 56°C above ambient to
210°C. A sheathed heater is positioned in the bottom of the chamber along with a constant-speed fan that
circulates heated air rapidly throughout the chamber. The metal cover shields the fan and protects
against splattering in the event that any material is accidentally spilled in the area of the fan.
Chamber temperature is conveniently monitored via an LED display on the control panel. To guard
against over-temperature conditions, a factory- set hi-limit thermostat is an integral part of the electrical
system.
One-inch thick silica-based insulation in the double-walls of the chamber helps retain chamber heat. The
interior walls of the chamber are stainless steel and the shelves are chrome-plated steel for ease of
maintenance and clean up.
Oven Incubators have a steel exterior finished in baked enamel and are rigidly constructed for long,
trouble-free service.
These instructions contain important operating and safety information. The user must carefully read and
understand these instructions before using the oven. Your unit has been designed to optimize function,
reliability, safety and ease of use. It is the user’s responsibility to install the oven in conformance with
local electrical codes.
Specifications
Performance characteristics
Temperature range:
Thermostat control:
Thermometer, digital:
All models ambient +5°C to 210°C
+5% over entire range
+2°C over entire range
Environmental operating conditions
Pollution degree:
2
Installation category:
II
Altitude:
2000 meters MSL (mean sea level)
Humidity:
80% maximum, non-condensing
Electrical supply:
120VAC or 240VAC
Voltage tolerance:
+10% of normal rated line
Temperature:
15°C to 40°C
Product usage:
This product is intended for indoor use only
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
5
Unpacking and installation
The shipping carton should be inspected upon delivery. When received, carefully examine for any
shipping damage before unpacking. If damage is discovered, the delivering carrier should both specify
and sign for the damage on your copy of the delivery receipt.
Open the carton carefully, making certain that all parts are accounted for before packaging materials are
discarded. After unpacking, if damage is found, promptly report it to the carrier and request a damage
inspection promptly.
Important
Failure to request an inspection of damage within a few days after receipt of shipment
absolves the carrier from any liability for damage. Call for a damage inspection promptly.
Warning
Do not place oven on or near any combustible surface to avoid the possibility of fire and
resulting property loss and injury or death to personnel.
Caution
Do not remove the rubber space feet. Removal of the feet will prevent proper air venting
(air used to cool the electronics is discharged out the bottom) of oven chamber that may
cause excessive heat buildup on electrical components and erratic control of
temperature.
Caution
Bottom shelf is fixed in place to guard against access to heater area and possibility of
injury. Do not remove bottom shelf unless performing maintenance or repair.
Note
Disconnect unit from the power source when not in use.
Location
The oven should be located in an area free from drafts and sources of heat, as well as allowing for natural
air movement to dissipate heat from the oven.
To ensure needed ventilation around the oven, allow 1.5 inches on each side and 3 inches at the back.
Allow enough distance above the unit to be able to install and retrieve the thermometer.
Leveling
The oven should be on a level surface in order to facilitate movement of materials into and out of the
chamber.
Shelving
Slide shelves into place inside the oven and position according to the height required for the items or
materials to be heated.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
6
Electrical connection
The 120V unit is supplied with a 3-wire line cord with molded plug. It should be connected to a 120V
outlet designed for 3-prong plugs. For an outlet designed to accept 2-prong plugs (ungrounded), the best
advice is to have a qualified electrician replace it with a new, grounded outlet.
If a plug must be installed, use only the 3-prong grounded type, rated for the unit load requirements and
matching the power outlet. Make sure the green ground wire is secured to the plug ground terminal.
The unit must be connected to a power source that meets the electrical requirements as specified on the
unit's nameplate.
Be advised
Where it becomes necessary to make changes in electrical outlets, wiring and other characteristics, it is
recommended that these be done by a qualified or journeyman electrician. This includes replacing 2prong plugs (ungrounded), for example with a 3-prong plug (grounded).
All changes need to be made to match the load requirements shown on the nameplate of the unit.
Warning
-
This unit is not explosion-proof. Do not use in the presence of flammable or combustible
materials; fire or explosion may result. Unit contains components that may ignite such
materials. Before operating oven, always observe the following safety precautions:
Fumes and spillage from acidic solutions cause corrosion of the stainless steel chamber.
Maintain a neutral pH at all times.
The oven heater is in the bottom of the unit. Surface temperatures at the bottom cover of the
unit may be higher than set point temperature. For example: A plastic container on the heater
cover may become hot enough to melt/burn the container at settings below the melting point of
plastic. Do not place items on the heater cover.
-
Operation
1. POWER SWITCH. Turns unit
on (green status lamp lights
on and off).
2. HI-LIMIT STATUS LAMP.
Lights when the hi-limit
theromostat is activated. It
goes out when oven reverts
to a safe operating range.
3. CALIBRATION POTENTIOMETER. Utilizing a jeweler’s screwdriver, the temperature readout can
be adusted.
4. LED DISPLAY. Displays current chamber temperatures.
5. TEMPERATURE CONTROL (THERMOSTAT). Raises and lowers temperatures.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
7
6. HEATERS STATUS LAMP. Lights when heaters are energized.
Temperature control
1. With the temperature control thermostat (5) in the extreme counterclockwise position, turn
the power (rocker) (1) to its On position. (Switch's green status lamp will light.)
2. Turn the temperature control thermostat (5) in clockwise direction to increase the temperature
and counterclockwise to lower it. The amber status lamp (6) above the thermostat goes on when
the heaters are energized. Wait for the chamber temperature to stabilize before advancing
thermostat too rapidly to reach target temperature. Note that dial setting to obtain a specific
temperature will need to be approximated and can be affected by such factors as changes in line
voltage, ambient conditions and types of materials being heated.
3. Read the LED display (4) for the chamber temperature produced by each setting of the
temperature control thermostat (5). As experience is gained with the temperature control
thermostat, improved results will be obtained in setting it to achieve specific target temperatures.
4. Always allow time for the oven to reach target temperature and to stabilize before making further
adjustments of the temperature control thermostat.
Caution
At the higher temperatures, the exterior of the oven and particularly the vent ring on
the top of the oven become warm to the touch. To avoid burns, do not touch these
surfaces.
-
A factory-set hi-limit thermostat cuts off power to the heater in the event that the maximum
operating range is exceeded. The red status lamp (2) on the control panel indicates when
the hi-limit thermostat is controlling. It goes out when the oven reverts to a safe operating
range.
Maintenance
The bottom shelf that covers the heater can be removed for easy access to the heater area.
Clean up any spills as soon as possible to prevent materials being baked on surfaces. When the oven is
cool, use a mild soap and water to clean surfaces. Rinse thoroughly and dry. It is best to avoid highly
abrasive cleaners which can damage the finish of the interior surfaces and shelves.
Warning
Disconnect plug from electrical outlet before attempting any maintenance or repair of this
unit.
Note
Make no attempt to service or repair an Electron Microscopy Sciences product under
warranty before consulting your EMS dealer. After the warranty period, such consultation
is still advised, especially when the repair may be technically sophisticated or difficult. If
assistance is needed beyond what the distributor can provide, please call our customer
service line at 1-800-523-5874.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
8
Care and cleaning of stainless steel
Stainless steel is an alloy of steel with chromium and nickel that increase the metal's resistance to rust
and corrosion. Yet, if not properly cared for, stainless steel can rust and corrode.
Exposure to air provides the passivation, or oxide layer coating, for clean stainless by producing a thin,
durable chromium-oxide that forms rapidly on the alloy surface to give stainless its characteristic
"stainless" quality.
Also, exposure of the surface to other oxidizing environments can produce a passivating film or coating.
However, if free oxygen is not available due to scale or contamination buildup, the metal surface may
become vulnerable to rusting and corrosion as well as pitting. But by maintaining neutral pH and
conducting frequent cleanings with detergent and water, years of trouble-free service from stainless steel
products can be obtained.
Warning
Electrolysis can damage stainless steel. This occurs when an object is allowed to rest
directly on the surface of stainless steel, trapping moisture that becomes oxygenstarved, but is surrounded by water-containing oxygen.
Some stainless guidelines to consider
Distilled water is recommended. Please note, if this water is very pure, it may be corrosive to
stainless. When filling a bath or incubator, always add 2 to 40 PPM (20 to 40 mg/liter) disodium
phosphate or sodium bicarbonate, adjusting dosage to provide a pH value of 7 to 9. If not available,
use clean, aerated soft tap water provided the total solids concentration is < 500 PPM. We do not
recommend using 18M Ohm deionized water. If this is the only source of treated water available, mix
with regular tap water at a 50/50 ratio.
The pH factor
Check pH regularly. If pH is <6.0, add disodium phosphate to increase pH to a 7 to 9 value. Sodium
carbonate or sodium bicarbonate may be used but they tend to form scale that must be rinsed out
regularly. If pH is >10.0, add sodium bisulfate to decrease pH to a 7 to 9 value. Avoid adding harsh
alkaline or acids since these may cause localized corrosion and result in unstable pH.
Special considerations
Chemicals which should be limited to a 3-hour maximum exposure time to stainless steel are:
aluminum chloride, barium chloride, calcium chloride, chlorinated lime, citric acid (boiling), Dakin’s
solution, E.D.T.A. ferrous chloride, Lysol, mercury salts, phenol, potassium permanganate, potassium
thiocyanate, sodium hypochlorite, stannous chloride, tartaric acid.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
9
Warning
It is necessary to use these chemicals, limit exposure time to a maximum of 3 hours –
always clean surfaces immediately after use.
Be advised
Never use the following on stainless steel: Aqua regia, sodium acid, ferric chloride,
sodium azide, iodine,
Chemical spills, especially those agents listed here, should be removed as soon as possible and the
stainless steel surface cleaned with mild soapy water followed by a clean water rinse.
Cleansing agents
Anti-fungal and anti-bacterial additives are permissible to use as long as the pH of the aqueous
solution is kept within the range of 7 to 9. These are available through laboratory distributors. Be sure
to confirm that they are not harmful to stainless steel.
Cleaning methods
Do not use any metallic pads. Instead, for stubborn stains, use a plastic light-duty cleansing pad and
rub gently in the direction of the metal grain. If stains continue to persist, use one of the following
chemicals and methods:
-
Any variety of “scale removers” available at local supermarkets or hardware stores used
for cleaning of coffee stains, humidifiers, or vaporizers.
-
A 15% to 35% phosphoric acid solution available from laboratory supply distributors for
scale and rust removal. Allow solution to soak the surface affected until ruse and scale is
loosened. Immediately follow with a clean water rinse.
-
Citric acid-based cleaners.
-
Bathroom tub and tile cleaners.
Regardless of the approach utilized, always follow the manufacturer’s directions and allow the
chemicals to do the cleaning with minimal scrubbing. Always allow cleanings with a clean water rinse.
Air dry.
Caution
Extreme care must be taken when handling these materials. Always work in an area
with adequate ventilation. Use the precautions as outlined in the MSDS and the
manufacturer’s instructions for the product being utilized.
Note
The use and disposal of these chemicals may be regulated by your local city codes;
consult those regulations before disposing of those materials.
Materials effective in disinfecting: Glutaraldehyde, alcohol.
Be advised
This information is intended as guidelines only and we make no claim as to the suitability
to any particular situation. Consult your staff chemist to determine what would be best for
your stainless steel product and laboratory.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
10
Failure to heat
If the oven fails to heat, there are several possible causes:
- The oven is not receiving electrical power.
-
The heater is burned out.
-
The thermostat is malfunctioning.
Have a qualified electrical technician determine the cause of the problem and make the necessary
repairs.
Part replacement procedures
The following should be performed only by authorized personnel:
1. Unplug the unit from the power source.
2. If oven has been recently used, be certain that surfaces are safe to the touch before attempting to
carry out any of the following procedures.
3. Remove contents of the oven and thermometer from the top of the unit.
Replacing the thermostat
1. Place unit on its side with door latch facing down.
2. Remove back by unscrewing Phillips screws. Save.
3. Carefully remove insulation. Note how it is positioned, so that it can be easily reinstalled.
4. Remove bottom panel by unscrewing Phillips screws. Save.
5. Remove control knob by unscrewing 2 Allen screws. Save.
6. Disconnect wires from thermostat. Note position of wires for subsequent reattachment in same
sequence.
7. Knob removal allows access to 2 screws that mount thermostat to panel. Remove the screws and
save.
8. Remove bottom shelf inside chamber. Loosen screw on clamp that holds thermostat-sensing bulb
to heater. Note position of temperature-sensing bulb, so that new one can be clamped in same
location.
9. Slide bulb toward exit hole at back of unit.
10. Move to back of unit and pull temperature-sending bulb and tube through hole.
11. Next, pull bulb and tube through bottom hole.
12. Thermostat, sensing bulb, and tube assembly can now be removed.
13. Reverse above procedure to install new thermostat.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
11
14. Avoid making sharp bends in temperature-sensing tube; otherwise, flow of temperature-sensing
fluid will be impeded.
Replacing power switch
1. With unit on its side in the preceding, remove bottom plate and save screws.
2. Disconnect wires from switch. Note sequence of pin numbers on the side of the switch and
attachment of wires. The replacement switch must be oriented in the same manner and wires
attached in same sequence.
3. Compress holding tabs on switch and push out.
4. Insert new switch from the front. When inserting, follow same orientation of pin numbers as on the
switch just removed.
5. Attach wires in SAME SEQUENCE as originally attached. To verify that correct sequence has
been followed, refer to wiring schematic.
6. Reverse remainder of procedure.
Replacing status lamp bulb assembly
1. With unit on its side as in the preceding, remove bottom plate and save screws.
2. Note plastic lamp unit that houses bulb. Be alert that lens will pop out in next step.
3. Grasp lamp unit and pull a fraction of an inch toward the attached wires. Lens will pop out of the
front. Discard.
4. To install a new pilot lamp unit, splice the two wires of the assembly to previously cut wires using
insulated crimp connectors.
5. Re-install lens.
6. Re-install bottom plate.
Replacing hi-limit thermostat
1. Remove back panel and carefully remove insulation for subsequent reinstallation. Save.
2. Hi-limit thermostat is mounted on back of inner chamber wall.
3. Unscrew 2 screws and nuts holding wires. Save.
4. Remove screw securing thermostat to back of inside wall.
5. Reverse preceding procedure to install a new hi-limit thermostat.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
12
Replacing heater
1. Heater is located in bottom of chamber. Be sure that unit has been turned off for a period of time,
so that there is no residual heat on any of the surfaces.
2. Remove back panel by unscrewing Phillips screws and save.
3. Carefully remove insulation and save. Note how it is positioned, so that it can be easily
reinstalled.
4. Remove two retaining clips that mount heater to back of inside wall. Save.
5. Remove wires to heater by uncoupling the quick-disconnects.
6. Remove bottom shelf inside chamber. Loosen screw on clamp which holds thermostat-sensing
bulb, so that new one can be clamped in same location.
7. Install new heater and reverse the preceding steps.
Replacing blower wheel: Servicing
1. Disconnect power cord.
2. Remove shelves. Note that bottom shelf is retained by a clip at the back of the oven. Lift shelf at
the front edge until the back edge can be withdrawn from the clip.
3. Remove Phillips screws holding shield that covers blower wheel.
4. Inspect blower wheel assembly for tightness and any off-center operation. Inspect blower wheel
itself for damage to vanes or other deterioration. If assembly is loose, tighten setscrew-holding
wheel to motor shaft until wheel turns true. If wheel is damaged, replace.
5. Replace the shield and shelves.
Replacing the blower motor
1. Disconnect unit from power source. If previously in use, let unit cool down.
2. Lay unit on side. Remove shelves, including the bottom one.
3. Remove bottom cover, fan shield and blower fan.
4. Accessing the unit from the bottom, remove motor and bracket assembly. Disconnect wires.
5. Remove shaft extension, bottom fan and motor bracket from old motor and reinstall on new,
replacement motor.
6. Re-install motor assembly into unit in reverse order of removal.
7. Reconnect wires.
8. Re-install shelves. Make sure that bottom shelf is securely in place to prevent access to the
heater area.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
13
Temperature readout calibration
A temperature readout calibration potentiometer (3) is located in the upper left hand corner of the LED
display and is indicated by the word “OFST”. Use a jeweler’s screwdriver to make adjustments.
1. Have a digital thermometer, known reliable thermocouple (Type-K or Type-T) and the jeweler’s
screwdriver in hand.
2. Insert the thermocouple sensor through the outside top vent hold and position it in the center of
the oven chamber.
3. Set oven temperature to a desired set point and turn on the power.
4. Allow temperature to stabilize for at least 2 hours before making any adjustments.
5. Compare the chamber temperature on the digital thermometer to the temperature on the oven
readout.
6. Insert jeweler’s screwdriver in calibration hole and adjust the oven readout to match the
thermometer reading. Turn potentiometer clockwise to increase reading and counterclockwise to
decrease it.
7. Take two additional readings within an approximate 30-minute time span and make any
necessary adjustments to the potentiometer. This takes into account any temperature variations
that might exists within the oven and the time delay in responding to such factors by the
temperature sensors.
Replacement parts and ordering procedures
To inquire about or order replacement parts, please call Electron Microscopy Sciences’ Customer Service
department at 1-800-523-5874. You may also choose to order your replacement parts through our
website at www.emsdiasum.com.
Electron Microcopy Sciences
1560 Industry Road Hatfield, PA 19440
TEL: 215-412-8400 TOLL FREE: 1-800-523-5874
FAX: 215-412-8450 EMAIL: sgkcck@aol.com
WEB: www.emsdiasum.com
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