Thomas Scientific 5300A20/F48025-TS Manual de usuario
Muffle Furnace
OPERATION MANUAL
AND PARTS LIST
Series 1285
Model Voltage Control Display
5300A20/F48025-TS 120V Single Setpoint Model °C
with OTP
5300A25/F48025-80-TS 120V 8 Setpoint Programmable Model °C
with OTP
LT1285X5 • 5/12/09
Safety Information ..............................................................................................................................................3
Alert Signals..................................................................................................................................................3
Warnings ......................................................................................................................................................3
Introduction..........................................................................................................................................................5
Intended Use ................................................................................................................................................5
eneral Usage..............................................................................................................................................5
Principles of Operation ................................................................................................................................5
eneral Specifications ........................................................................................................................................6
Models 5300A20/F48025-TS and 5300A25/F48025-80-TS ........................................................................6
Environmental Conditions ............................................................................................................................7
Unpacking ..........................................................................................................................................................8
Installation ..........................................................................................................................................................9
Site Selection................................................................................................................................................9
Electrical Connections ..................................................................................................................................9
Operation, All Models ........................................................................................................................................10
Power Switch ..............................................................................................................................................10
Cycle Light ..................................................................................................................................................10
Door Safety Switch ....................................................................................................................................10
Single Setpoint Model with OTP ......................................................................................................................11
Single Ramp & Dwell ........................................................................................................................................15
8 Segment Programmable Models with OTP....................................................................................................17
Furnace Loading ..............................................................................................................................................31
Preventative Maintenance ................................................................................................................................32
eneral Cleaning Instructions ....................................................................................................................32
Troubleshooting ................................................................................................................................................33
Maintenance and Servicing ..............................................................................................................................35
To Replace a Heating Element ..................................................................................................................35
To Replace a Chromel/Alumel Thermocouple ............................................................................................36
To Replace Door Switches (Micro-Switch) ................................................................................................37
To Realign Door Switches (Micro-Switch) ..................................................................................................37
To Replace the Controller ..........................................................................................................................38
Replacement Parts............................................................................................................................................39
Single Setpoint Models with OTP ..............................................................................................................39
8 Segment Programmable Models with OTP ............................................................................................39
Ordering Procedures ..................................................................................................................................39
Wiring Diagrams................................................................................................................................................40
Warranty Repair and Service ............................................................................................................................44
2
Table of Contents
This manual contains important operating and safety infor-
mation. You must carefully read and understand the con-
tents of this manual prior to the use of this furnace.
Your Thomas Scientific 5300A20/F48025-TS or
5300A25/F48025-80-TS Muffle Furnace has been
designed with function, reliability and safety in mind. It is
your responsibility to install it in conformance with local
electrical codes. For safe operation, please pay attention to
the alert signals throughout the manual.
Warnings
To avoid electrical shock, this furnace must:
1. Use a properly grounded electrical outlet of cor-
rect voltage and current handling capacity.
2. Be disconnected from the power supply prior to
maintenance and servicing.
3. Have the door switch operating properly.
To avoid personal injury:
1. Do not use in the presence of flammable or com-
bustible materials; fire or explosion may result.
This device contains components which may
ignite such material.
2. Caution: Hot Surface - Avoid Contact. To avoid
burns, do not touch the exterior or interior sur-
faces of this furnace during use or for a period of
time after use.
3. Always wear safety glasses or a safety shield and
high temperature gloves when loading or unload-
ing the furnace. Long sleeved, fire retardant cloth-
ing and a fire retardant apron is also recommend-
ed.
4. Refer servicing to qualified personnel.
3
Safety Information
Warning
Warnings alert you to a possibility of per-
sonal injury.
Caution
Cautions alert you to a possibility of
damage to the equipment.
Note
Notes alert you to pertinent facts and
conditions.
Hot Surface
Hot surfaces alert you to a possibility of
personal injury if you come in contact
with a surface during use or for a period
of time after use.
Alert Signals
Warning
This warning is presented for compliance with California
Proposition 65 and other regulatory agencies and only applies
to the insulation in this product. This product contains refracto-
ry ceramic, refractory ceramic fiber or fiberglass insulation,
which can produce respirable dust or fibers during disassem-
bly. Dust or fibers can cause irritation and can aggravate pre-
existing respiratory diseases. Refractory ceramic and refractory
ceramic fibers (after reaching 1000°C) contain crystalline silica,
which can cause lung damage (silicosis). The International
Agency for Research on Cancer (IARC) has classified refracto-
ry ceramic fiber and fiberglass as possibly carcinogenic ( roup
2B), and crystalline silica as carcinogenic to humans ( roup 1).
The insulating materials can be located in the door, the hearth
collar, in the chamber of the product or under the hot plate top.
Tests performed by the manufacturer indicate that there is no
risk of exposure to dust or respirable fibers resulting from oper-
ation of this product under normal conditions. However, there
may be a risk of exposure to respirable dust or fibers when
repairing or maintaining the insulating materials, or when other-
wise disturbing them in a manner which causes release of dust
or fibers. By using proper handling procedures and protective
equipment you can work safely with these insulating materials
and minimize any exposure. Refer to the appropriate Material
Safety Data Sheets (MSDS) for information regarding proper
handling and recommended protective equipment. For addi-
tional MSDS copies, or additional information concerning the
handling of refractory ceramic products, please contact the
Customer Service Department at Thomas Scientific at 1-800-
345-2100.
4
SAFETY INFORMATION
Warning
Refer servicing to qualified per-
sonnel.
Intended Use
The 5300A20/F48025-TS or 5300A25/F48025-80-TS
furnace is a general purpose laboratory and heat treat-
ing furnace. For optimum element life, Thomas
Scientific recommends observing these temperature
ranges: from 100°C (212°F) to 1093°C (2000°F) contin-
uous use or from 1093°C (2000°F) to 1200C (2192°F)
for intermittent use. Continuous use is operating the
furnace for more than 3 hours and intermittent use is
operating the furnace for less than 3 hours.
All furnaces consist of: 1) a vented heating chamber;
2) a temperature controller; and 3) a door safety switch
for operator safety.
eneral Usage
Do not use this product for anything other than its
intended usage.
Principles of Operation
The furnace chamber is heated by open coil electric
resistance elements and is insulated with ceramic fiber
insulation. The controller is located under the furnace
chamber and is well insulated from the heat generated
in the furnace chamber. A door safety switch removes
power to the heating elements whenever the furnace
door is opened. The temperature is controlled by one
of three types of controllers.
5
Introduction
Caution
Do not exceed operating temperatures
shown in “ eneral Specifications.”
Exceeding these limits will result in
severely reduced element life.
6
eneral Specifications
Models 5300A20/F48025-TS and 5300A25/F48025-80-TS
Dimensions in Inches (cm):
Chamber: 7 (17.8) W x 5 (12.7) H x 10 (25.4) D
Overall: 13.25 (33.7) W x 19 (48.3) H x 19.5 (49.5) D
Weight: 56 lb. (25.4 kg)
Electrical Ratings:
Volts: 120
Amps: 14.5
Watts: 1800
Frequency: 50/60
Phase: 1
Temperature:
Operating Range: 2000°F (1093°C) continuous
2192°F (1200°C) intermittent
7
GENERAL SPECIFICATIONS
Environmental Conditions
Operating: 17°C to 27°C; 20% to 80% relative humidity, non-condensing. Installation Category II
(overvoltage) in accordance with IEC 664. Pollution degree 2 in accordance with IEC 664.
Altitude Limit: 2,000 meters.
Storage: -25°C to 65°C; 20% to 80% relative humidity
8
1. Visually check for any physical damage
to the shipping container.
2. Inspect the equipment surfaces that are
adjacent to any damaged area.
3. Open the furnace door and remove the
packing material from inside the furnace
chamber.
4. Vacuum the chamber prior to use to
remove the insulation dust due to ship-
ment. (The 5300A20/F48025-TS and
5300A25/F48025-80-TS furnaces are
supplied with one ceramic shelf.)
5. Retain the original packaging material if
reshipment is foreseen or required.
Unpacking
9
Site Selection
Install furnace on a sturdy surface and allow adequate
space for ventilation.
Electrical Connections
The electrical ratings are located on the specification
plate on the back of the furnace. Consult Thomas
Scientific if your electrical service is different than
those listed on the specification plate. Be sure the front
power switch is in the OFF position before connecting
the furnace to your electrical supply.The
5300A20/F48025-TS or 5300A25/F48025-80-TS fur-
naces are supplied with a power cord rated at 120V,
15 amps.
Installation
Caution
Be sure ambient temperature does not
exceed 40°C (104°F). The recommended
ambient temperature is 17°C - 27°C.
Ambients above this level may result in
damage to the controller.
Warning
To avoid electrical shock, this furnace
must always use a properly grounded
outlet of correct voltage and current han-
dling capacity.
Caution
Allow at least six inches of space
between the furnace and any combustible
surface. This permits the heat from the
furnace case to escape so as not to cre-
ate a possible fire hazard.
10
Power Switch
Both the ON/OFF power switch and the digital display
will illuminate when power is switched ON. The fur-
nace will begin to heat to its controller's current set-
point. (See the instructions for your type of controller
for information on checking and setting the setpoint.)
Cycle Light
The amber cycle light will illuminate whenever the
power is being applied to the heating elements. The
cycle light will turn on and off as the furnace reaches
the setpoint.
Door Safety Switch
The door safety switch removes power from the heat-
ing elements when the door is opened. Open and
close the door a few times; note that the amber
CYCLE light will switch off when the door is opened.
If this condition is not true, consult the
Troubleshooting section before proceeding. This
check must be done when the furnace is heating and
the cycle light is illuminated.
Operation, All Models
Warning
To avoid personal injury do not use in the
presence of flammable or combustible
chemicals; fire or explosion may result.
This device contains components which
may ignite such materials.
Hot Surface
Caution: Avoid Contact. To avoid burns,
this furnace must not be touched on the
exterior or interior surfaces during use or
for a period of time after use.
Warning
To avoid electrical shock, the door safety
switch must be operating properly.
Warning
Always wear safety glasses or a safety
shield and high temperature gloves when
loading or unloading the furnace. Long
sleeved, fire retardant clothing and a fire
retardant apron is also recommended.
Este manual sirve para los siguientes modelos
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