1

LT1057X1 • 8/6/99 Serial Number

Type 47900 & 48000

Furnaces

OPERATION MANUAL

AND PARTS LIST

SERIES 1057

Model Numbers

F47910 220-240

F47910-33 220-240

F47914 100

F47915 120

F47918 208

F47920 220-240

F47920-33 220-240

F47924 100

F47925 120

F47928 208

F47920-80 220-240

F47920-33-80 220-240

F47924-80 100

F47925-80 120

F47928-80 208

F47950 220-240

F47950-33 220-240

F47954 100

F47955 120

F47958 208

F48010 220-240

F48010-33 220-240

F48014 100

F48015 120

F48018 208

F48020 220-240

F48020-33 220-240

F48024 100

F48025 120

F48028 208

F48020-80 220-240

F48020-33-80 220-240

F48024-80 100

F48025-80 120

F48028-80 208

F48050 220-240

F48050-33 220-240

F48055 120

F48058 208

BARNSTEAD THERMOLYNE
2

Thank you for buying this Thermolyne furnace. We believe that you will find it to be the best

furnace of its kind available. Please note that this manual contains important operating and

safety information. You must carefully read and understand the contents of this manual prior

to the use of this furnace.

Important Information
3

Model Information

MODEL NO. VOLTAGE CONTROL DISPLAY

F47910220-240 BASIC AUTOMATIC °C

F47910-33 220-240 BASIC AUTOMATIC °C

F47914 100 BASIC AUTOMATIC °

F47915 120 BASIC AUTOMATIC °C

F47918 208 BASIC AUTOMATIC °C

F47920 220-240 AUTOMATIC °F & °C

F47920-33 220-240 AUTOMATIC/EUROPEAN °F & °C

F47924 100 AUTOMATIC °F & °C

F47925 120 AUTOMATIC °F & °C

F47928 208 AUTOMATIC °F & °C

F47920-80 220-240 PROGRAMMABLE (4 RAMP & 4 DWELL) °F

F47920-33-80 220-240 PROGRAMMABLE/EUROPEAN (4 RAMP & 4 DWELL) °F

F47924-80 100 PROGRAMMABLE (4 RAMP & 4 DWELL) °F

F47925-80 120 PROGRAMMABLE (4 RAMP & 4 DWELL) °F

F47928-80 208 PROGRAMMABLE (4 RAMP & 4 DWELL) °F

F47950 220-240 PROGRAMMABLE W/COMMUNICATIONS (8 RAMP & 8 DWELL) °F & °C

F47950-33 220-240 PROGRAMMABLE/EUROPEAN W/COMMUNICATIONS °F & °C

(8 RAMP & 8 DWELL)

F47954 100 PROGRAMMABLE W/COMMUNICATIONS (8 RAMP & 8 DWELL) °F & °C

F47955 120 PROGRAMMABLE W/COMMUNICATIONS (8 RAMP & 8 DWELL) °F & °C

F47958 208 PROGRAMMABLE W/COMMUNICATIONS (8 RAMP & 8 DWELL) °F & °C

F48010 220-240 BASIC AUTOMATIC °C

F48010-33 220-240 BASIC AUTOMATIC °C

F48014 100 BASIC AUTOMATIC °C

F48015 120 BASIC AUTOMATIC °C

F48018 208 BASIC AUTOMATIC °C

F48020 220-240 AUTOMATIC °F & °C

F48020-33 220-240 AUTOMATIC/EUROPEAN °F & °C

F48024 100 AUTOMATIC °F & °C

F48025 120 AUTOMATIC °F & °C

F48028 208 AUTOMATIC °F & °C

F48020-80 220-240 PROGAMMABLE ( 4 RAM & 4 DWELL) °F

F48020-33-80 220-240 PROGRAMMABLE/EUROPEAN (4 RAMP & 4 DWELL) °F

F48024-80 100 PROGRAMMABLE ( 4 RAMP & 4 DWELL) °F

F48025-80 120 PROGRAMMABLE ( 4 RAMP & 4 DWELL) °F

F48028-80 208 PROGRAMMABLE (4 RAMP & 4 DWELL) °F

F48050 220-240 PROGRAMMABLE W/COMMUNICATIONS (8 RAMP & 8 DWELL) °F & °C

F48050-33 220-240 PROGRAMMABLE/EUROPEAN W/COMMUNICATIONS °F & °C

(8 RAMP & 8 DWELL)

F48054 100 PROGRAMMABLE W/COMMUNICATIONS (8 RAMP & 8 DWELL) °F & °C

F48055 120 PROGRAMMABLE 2/COMMUNICATIONS (8 RAMP & 8 DWELL) °F & °C

F48058 208 PROGRAMMABLE W/COMMUNICATIONS (8 RAMP & 8 DWELL) °F & °C
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Table of Contents

Important Information ........................................................................................................................................... 2

Model Information ................................................................................................................................................ 3

Safety Information ................................................................................................................................................ 5

Introduction .......................................................................................................................................................... 7

 General Usage ................................................................................................................................................... 7

General Specifications ......................................................................................................................................... 8

 Environmental Conditions .................................................................................................................................. 8

Declaration of Conformity..................................................................................................................................... 9

Installation .......................................................................................................................................................... 10

Unpacking ...................................................................................................................................................... 10

Site Selection ................................................................................................................................................. 10

Electrical Connections ................................................................................................................................... 10

Furnace Operation, All Models........................................................................................................................... 11

Basic Automatic Control ..................................................................................................................................... 12

Single Setpoint Temperature Control (Automatic) ............................................................................................. 15

4 Ramp & 4 Dwell Programmable Models ......................................................................................................... 18

8 Ramp & 8 Dwell Multi-Programmable Models ................................................................................................ 26

Furnace Loading ................................................................................................................................................ 37

Preventative Maintenance.................................................................................................................................. 38

Problem Solving Tips ......................................................................................................................................... 39

Maintenance and Servicing ................................................................................................................................ 41

Replacement Parts List ...................................................................................................................................... 48

Wiring Diagrams................................................................................................................................................. 49

Material Safety Data Sheet ................................................................................................................................ 53

Ordering Procedures .......................................................................................................................................... 55

One Year Limited Warranty................................................................................................................................ 56
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Your Thermolyne Type 47900 or 48000 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 correct 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 combustible 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 surfaces of this furnace during use

or for a period of time after use.

3. Refer servicing to qualified personnel.

Safety Information

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.

Warning

Warnings alert you to a

possibility of personal injury.

Caution

Cautions alert you to a

possibility of damage to the

equipment.

Note

Notes alert you ro pertinent

facts and conditions.

Alert Signals
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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 refractory

ceramic, refractory ceramic fiber or fiberglass insulation, which can produce respirable dust

or fibers during disassembly. Dust or fibers can cause irritation and can aggravate preexisting 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 refractory ceramic fiber

and fiberglass as possibly carcinogenic (Group 2B), and crystalline silica as carcinogenic to

humans (Group 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 operation 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 otherwise 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

additional MSDS copies, or additional information concerning the handling of refractory

ceramic products, please contact the Customer Service Department at

Barnstead|Thermolyne Corporation at 1-800-553-0039.

WARNING

REFER SERVICING TO QUALIFIED PERSONNEL.

1-800-446-6060

1-800-553-0039

PLEASE NOTE THE FOLLOWING WARNINGS:
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Intended Use

The Type 47900 and 48000 furnaces are general

purpose laboratory and heat treating furnaces. For

optimum element life, Thermolyne recommends

observing these temperature ranges: from 100°C

(212°F) to 1093°C (2000°F) for continuous use, or

from 1093°C (2000°F) to 1200°C (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

interlock relay for operator safety.

General usage

Do not use this product for anything other than

intended usage.

Principles of Operation

Furnace:

The furnace chamber is heated by two open coil

electric resistance heaters and is insulated with a

ceramic fiber insulation. The control 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 four types

of controllers.

Introduction

Caution

Do not exceed limitations for

continuous or intermittent

operating temperature

shown in the General

Specifications. Exceeding

these limits will result in

severely reduced heating

element life.
8

General Specifications

F479 Models

Dimensions

Chamber — Width: 12.7 cm. Height: 10.2 cm. Depth: 15.2 cm.

Overall — Width: 28.6 cm. Height: 45.7 cm. Depth: 39.4 cm.

Weight — 16.8 kg.

Electrical Ratings — Volts: 220-240. Amps: 4.2. Watts: 1000. Frequency: 50/60. Phase: 1

Temperature

Operating Range (continuous): 1093°C; (intermittent): 1200°C.

Environmental Conditions

Operating: 17°C - 27°C; 20% - 80% relative humidity, non-condensing. Installation

Category II (over-voltage) in accordance with IEC 664. Pollution Degree 2 in

accordance with IEC 664. Altitude limit: 2,000 meters.

Storage: -25°C - 65°C; 20% - 80% relative humidity.

F480 Models

Dimensions

Chamber — Width: 17.8 cm. Height: 12.7 cm. Depth: 25.4 cm.

Overall — Width: 33.7 cm. Height: 48.3 cm. Depth: 49.5 cm.

Weight — 25.4 kg.

Electrical Ratings — Volts: 220-240. Amps: 7.5. Watts: 1800. Frequency: 50/60. Phase: 1

Temperature

Operating Range (continuous): 1093°C; (intermittent): 1200°C.

Environmental Conditions

Operating: 17°C - 27°C; 20% - 80% relative humidity, non-condensing. Installation

Category II (over-voltage) in accordance with IEC 664. Pollution Degree 2 in

accordance with IEC 664. Altitude limit: 2,000 meters.

Storage: -25°C - 65°C; 20% - 80% relative humidity.

Environmental Conditions

Operating: 17°C - 27°C; 20% to 80% relative humidity, non-condensing. Installation

Category II (over-voltage) 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.
9

Declaration of Conformity

Barnstead|Thermolyne hereby declares under its sole responsibility that this product

conforms with the technical requirements of the following standards:

EMC: EN50081-1 Generic Emission Standard; EN 50082-1 Generic Immunity

Standard.

Safety: IEC 1010-1-92 Safety requirements for electrical equipment for measurement,

control and laboratory use; Part I: General Requirements

IEC 1010-2-010 Part II Particular requirements for laboratory equipment for the

heating of materials

per the provisions of the Electromagnetic Compatability Directive 89/336/EEC, as amended

by 92/31/EEC and 93/68/EEC, and per the provisions of the Low Voltage Directive 73/23/

EEC, as amended by 93/68/EEC.

The authorized representative located within the European Community is:

Electrothermal Engineering Ltd.

419 Sutton Road

Southend On Sea

Essex SS2 5PH

United Kingdom

Copies of the Declaration of Conformity are available upon request
10

Unpacking

Visually check for any physical damage to the

shipping container. Inspect the equipment surfaces

that are adjacent to any damaged area. Open the

furnace door and remove the packing material from

inside the furnace chamber. Vacuum the chamber

prior to use to remove the insulation dust due to

shipment. (The Type 48000 furnace is supplied with

one ceramic shelf.)

Retain the original packaging material if

reshipment is foreseen or required.

Site Selection

Install furnace on a sturdy surface and allow

adequate space for ventilation.

Electrical Connections

The electrical specifications are located on the

specification plate on the back of the furnace.

Consult Barnstead/Thermolyne 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.

Installation

Caution

Be sure ambient temperature

does not exceed 104°F

(40°C). Ambients above this

level may result in damage

to the controller.

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 create

a possible fire hazard.

Warning

To avoid electrical shock,

this furnace must always use

a properly grounded

electrical outlet of correct

voltage and current handling

capacity.
11

Furnace Operation, All Models

Power Switch

Both the ON/OFF power switch and the digital

display will illuminate when power is turned ON.

The furnace will begin to heat to its controller's

current setpoint. (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

heating elements when the door is opened. Open

and close the door a few times; note that the amber

CYCLE light will be out when door is open. This

check must be done when the furnace is heating or

when the cycle light is illuminated. If this condition

is not true, consult the Troubleshooting section

before proceeding.

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.

Caution: Hot Surface —

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

Note

The furnace will begin to

heat to its controller's current

setpoint each time you turn

the power switch "ON."

Warning

To avoid electrical shock,

this furnace must have the

door switch operating

properly.
12

This furnace controller is a single set point

controller. This controller provides a single digital

display to indicate either chamber temperature or

setpoint temperature. Also, this controller

incorporates sensor break protection, but does not

have over-temperature protection.

Digital Readout

The digital readout continuously displays chamber

temperature unless the Push To Set Temperature

button is depressed. When the Push To Set

Temperature button is depressed, the setpoint

temperature is displayed.

Push To Set Temperature Button

When this button is depressed, the digital display

will indicate setpoint temperature. When the button

is released, the actual chamber temperature is

displayed.

Basic Automatic Control
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Temperature Adjustment Knob

Turning this knob clockwise will increase the setpoint

temperature. Turning the knob counterclockwise will

decrease the setpoint temperature.

Operation of Basic Automatic

Control

This controller provides accurate control at one single

temperature setting. To set the temperature, simply:

a) Turn the Power switch ON.

b) While depressing the Push To Set

Temperature button, turn the temperature

knob clockwise to increase the setpoint or

counterclockwise to decrease the setpoint to

the desired setpoint temperature as

indicated on digital display.

c) Release the Push To Set Temperature

button.

BASIC AUTOMATIC CONTROL

Figure 1: Basic Automatic Controller

ON/OFF

Power Switch

Cycle Light

Push To Set Temperature Button

Temperature Setpoint

Adjustment Knob
14

BASIC AUTOMATIC CONTROL

The digital display will now indicate the actual

chamber temperature. The furnace will heat to the

new setpoint temperature. The CYCLE light will

remain on until the furnace temperature is within

1°C of the setpoint temperature; the cycle light will

then turn on and off as the controller maintains the

setpoint temperature.

Sensor Break Protection

This controller provides sensor break protection in

the event the thermocouple opens. If an open

thermocouple condition occurs, the digital display

will indicate 5 degrees or less and the power to the

heating element will be shut off (CYCLE light will

extinguish).

Note

If at any time the

Temperature Adjustment

knob is turned in either

direction, the setpoint will

change, even if the Push

To Set Temperature button

is not depressed. To view

the current setpoint

temperature, depress the

Push to Set Temperature

button.
15

Single Setpoint Temperature

Control (Automatic)

Note

Figure 2: Single Setpoint Controller

This furnace controller consists of a

microprocessor-based three-mode (Proportional,

Integral, Derivative), single setpoint temperature

controller. The controller features programmable

over–temperature protection, thermocouple break

indication and self-tuning capability.

Digital Readout:

The Digital Readout continuously displays chamber

(upper display) and setpoint (lower display)

temperatures unless the “SCROLL” button is

depressed.

Initial Startup:

When the power switch is turned on the controller

will perform a self-test to make sure controller is

operating properly. (If all four 1’s do not light up or

fails to go to “8888” contact Thermolyne.)

This temperature control is a

single setpoint device. By

using the "UP" or "DOWN"

buttons, a specific

temperature can be chosen.

The control will cause the

furnace chamber to heat to

the chosen temperature and

hold it at this temperature

until you turn off the power

switch or select another

temperature.

Furnace Chamber Temperature

Temperature Setpoint

Alarm Indicator

Cycle Light

Secret Key

Down Button Up Button

Scroll Button
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Temperature Indication:

This controller will display all temperatures in °C.

Contact Thermolyne if control needs to be changed

to °F.

Adjustment of Parameters

This controller's buttons are incorporated into its

front panel. To illuminate the “DOWN” button,

“SCROLL” button, and “UP” button, touch anywhere

on front panel.

Setpoint Temperature:

Push the “UP” button or the “DOWN” button to

modify the temperature setpoint (shown on the

lower digital display). Once set, the setpoint will

remain unchanged until you reset it. This allows you

to set the controller for a consistent procedure, then

simply turn the furnace on and off with the power

switch.

High Alarm (Over-Temperature

Protection OTP):

Push the “SCROLL” button until “AL.SP” (Alarm

Setpoint) appears.

Depress either the “UP” or “DOWN” button to

select the OTP value you desire. Thermolyne

recommends that you set the value either at the

maximum operating temperature of the furnace

(1210°C) or a value of 20 degrees above your

working temperature if you desire to provide

protection for your workload.

SINGLE SETPOINT TEMPERATURE CONTROL (AUTOMATIC)

Note

When performing these

steps, remember that if more

than eight to ten seconds

elapse before the buttons

are used again, the display

screen will automatically

switch back to displaying

chamber temperature. If this

happens, light up the front

panel again and step through

each parameter until you

reach the point at which the

interruption occurred. The

parameter values you

checked earlier, however,

will not be lost or altered.

Holding down on the

“SCROLL” button allows

longer viewing time.

Note

Overtemperature

protection: The controller is

fitted with a mechanical relay

which is de-energized in the

alarm mode. This relay,

when de-energized, removes

power from the heating

elements. If the primary

control circuit fails, the OTP

will control the furnace

temperature at the preset

value you have entered. It

does not shut off the furnace,

but will maintain the chamber

temperature at that value.
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Tuning:

This control incorporates a self tuning feature which

determines the optimum control parameters for the

best temperature accuracy with your load and

setpoint. Use this feature the first time you use your

furnace and each time you change either your

setpoint or the type of load you are heating.

Barnstead/Thermolyne highly recommends

using this feature to provide the best

temperature accuracy the controller can attain.

To use the Tuning feature:

First, adjust the setpoint to your desired value.

Then, push the “SCROLL” button until “tunE”

appears. To start the tuning function push the “UP”

button.

When the tuning process is started, the lower

display will flash “tunE” along with the furnace

temperature setpoint. During tuning the

temperature setpoint cannot be changed. To

change temperature setpoint, “tunE” must be turned

“OFF.” To stop the tuning function push the

“DOWN” button.

The next time you use your furnace, push the

“SCROLL” button until “tunE” appears. Insure that

“tunE” is “OFF.”

SINGLE SETPOINT TEMPERATURE CONTROL (AUTOMATIC)

Note

If the power to furnace is

“turned off” or interrupted

while in “tuning,” upon

returning power to furnace,

the controller display will

indicate “LinE FAIL” because

sampled data could be

questionable. To restart

tuning, refer to “Tuning”

procedure.

If the controller cannot

maintain temperature

setpoint, “tunE FAIL” will

appear on display. First

correct the problem

responsible for not

maintaining temperature

setpoint, then restart “tuning”

procedure.
18

This controller consists of a microprocessor based

three-mode (Proportional, Integral, Derivative),

programmable temperature controller with "Fuzzy"

logic capability, programmable over-temperature

protection and appropriate output switching devices

to control the furnace. The digital readout

continuously displays chamber (upper display) and

setpoint (lower display) temperatures unless the

“SEL” button is depressed.

The programmable control can be used as a

single setpoint control or as a programmable

control.

Single Setpoint Operation

To use as a single setpoint control simply push

“UP” or “DOWN” button to choose a specific

temperature.

1. The setpoint temperature presently set in

the control will be read out on the lower

display.

4 Ramp & 4 Dwell

Programmable Models

Figure 3: Programmable Control (4 ramp & 4 dwell)

Output Indicator

Up Button Enter Button

Furnace Chamber

Temperature

Non-functional

Alarm Indicator

Non-functional

Setpoint Temperature

"SEL" Button Down Button

To avoid electrical shock,

this furnace must have the

door switch operating

properly.

Warning

For optimum control of a

single setpoint operation, set

the "CTrL" parameter to

"FUZY" to take advantage of

the controller's fuzzy logic

capabilities.

Note
19

2. To change this setpoint, depress the “UP”

or “DOWN” button until the desired

setpoint value is displayed, then release

the button.

3. At this point the furnace will begin to heat

if the new setpoint temperature you have

chosen is higher than the present chamber

temperature.

Programmed Operation

Control Parameters

You can gain access to the control parameters by

holding the “SEL” button depressed for about 3

seconds. "LoCt" will be displayed in the upper

display.

Depressing “SEL” once again shows the next

parameter and its current value on the display. The

parameter value can either be modified with the

buttons or left unmodified. Pressing the enter button

(>) will allow you to modify the current value using

the "Up" and "Down" buttons. Press the enter

button again to set the new value as the current

value. (See "Programming the Controller" for

information on programming.)

The control parameters in order are:

LoCt - Parameter lock level. Determines the

number of parameters displayed when you press

"SEL". It should be set to "0002." If it does not,

set to "0002."

Nod - Mode. By pushing “UP” or “DOWN” buttons,

can be set to "Auto" or "NAn" (Manual). Set to

"Auto". In Manual mode, you must enter values to

control the furnace chamber temperature.

Note

When examining the

parameters, if you depress

and release either the “SEL,”

“UP,” or “DOWN” buttons

and more than 1 minute

elapses before the buttons

are used again, the display

screen will automatically

switch to displaying chamber

temperature. If this happens,

you will have to step through

each parameter until you

reach the point at which the

interruption occurred. The

parameter values you

checked earlier, however,

will not be lost or altered.

4 RAMP & 4 DWELL PROGRAMMABLE MODELS

Note

The furnace will begin to

heat to the current setpoint

temperature when you turn

the power switch "ON." To

examine the control

parameters without heating

the furnace, depress and

hold the “DOWN” button until

the setpoint (lower) display

reads "20".
20

At - Autotuning feature. Will automatically set

optimum PID values for your process. For

Tuning, set to "on." For normal operation, set to

"oFF."

StAt- Status. Displays current status of program

and cannot be changed.

Tine - Time. Displays the time remaining in the

current program.

ProG - Program options. Can be set to one of

three options: "oFF", "rUn" or "hold". "oFF" will

stop any running program and reset the program

to the beginning. "rUn" will start a program from

the beginning or resume a program from "hold"

from the point it was held. "hold" will interrupt a

running program without resetting the program to

the beginning.

Sü-1 - Setpoint 1. The temperature at which the

first ramp is aiming and at which the first dwell

will be held.

tN1r - Ramp time 1. The time the controller will

take to change the chamber temperature from its

present temperature to the value of Setpoint 1.

This time may be limited by the physical

capabilities of the furnace.

tN1S - Dwell time 1. The length of time the

controller will hold the furnace at the Setpoint 1

temperature.

Sü-2- Setpoint 2.

tN2r - Ramp time 2.

tN2S - Dwell time 2.

Sü-3 - Setpoint 3.

4 RAMP & 4 DWELL PROGRAMMABLE MODELS
21

tN3r - Ramp time 3.

tN3S - Dwell time 3.

Sü-4 - Setpoint 4.

tN4r - Ramp time 4.

tN4S - Dwell time 4.

P-on - Power-on start. Push the "Up" or "Down"

Buttons to set to "Yes" or "No." When set to

"Yes," your furnace will immediately begin

running the set program when you power on your

furnace. For most applications, set to "No."

The next three parameters - Proportional band,

Integral and Derivative - are the three control

parameters of a P.I.D. control system. The values

for these parameters are set during the tuning

process. You should not change them; doing so

may cause your controller to operate incorrectly.

P - Proportional band

i - Integral

d - Derivative

AL1T - Alarm type. This parameter determines

how the controller responds to any alarm input. It

should display "0031." If it does not, set it to

"0031."

AL11 - Furnace overtemperature alarm. This

parameter determines the absolute upper limit on

the furnace chamber temperature. We

recommend a setting of "1200" since 1200°C is

the maximum temperature your furnace can

obtain without damage to furnace components.

Note

Overtemperature protection:

The controller is fitted with a

mechanical relay which is deenergized in the alarm mode.

This relay, when de-energized,

removes power from the

heating elements. If the

primary control circuit fails, the

OTP will control the furnace

temperature at the value you

have entered for AL11. It does

not shut off the furnace, but will

maintain the chamber

temperature at that value.

4 RAMP & 4 DWELL PROGRAMMABLE MODELS
22

You may wish to set the parameter lower if you

need to ensure a crucial process is protected

from high temperature.

AL12 - High deviation alarm. This parameter

determines how far the furnace chamber

temperature can rise above your setpoint. We

recommend a setting of 20; since a P.I.D. control

process involves some degree of temperature

overshoot, a setting of less than 20 may interfere

with the function of your controller.

LooP - Thermocouple break alarm detection

time. For proper operation of your furnace, this

parameter should be set to "0.00". If it is not, set

it to "0.00".

CTrL - Control type. Push the "Up" or "Down"

buttons to set to "Pid" or "FUZY". Programmed

operation requires P.I.D. control. Single setpoint

operation will achieve better control using Fuzzy

logic control.

Programming Controller

This controller allows you a maximum of 4 ramp

and 4 dwell segment combinations, thus enabling 4

different setpoint levels to be achieved. Each ramp

is programmed by specifying the ending

temperature level and the required time to ramp to

that temperature. The controller then automatically

calculates the ramp rate required to attain the

ending temperature level based on the desired

ramp time. Dwell segments then can be attached to

each temperature level to hold that temperature for

a specified amount of time.

To run a program, first determine your ramp times,

ending temperature levels and dwell times. It is

helpful to graph your program out for ease of

loading the program into the controller.

Typical Profile for Programmable Models

(Other Profiles May Be Formed)

Caution

Remember that whenever

the power switch is turned

“ON,” the furnace will begin

to heat at the setpoint

temperature that was

previously set. This value will

remain unchanged for up to

a year without power being

applied to the control.

4 RAMP & 4 DWELL PROGRAMMABLE MODELS
23

If you desire to skip a ramp

or dwell segment, follow this

procedure:

• for a dwell segment, enter a

setting of “0” minutes.

• for a ramp segment, enter a

setting of "00.00"

hour.minutes. This will cause

controller to skip to next

segment as fast as the

furnace can heat or cool

down.

Note

Make sure "ProG" (program options) is set to

"oFF" (to stop the program) when entering program

values.

Push “SEL” button until “Sü-1” is displayed. Push

the Enter button (>) to select the current value.

Push “UP” or “DOWN” button and set Setpoint 1

in °C. Push the Enter button to enter the set

value as the current value.

Push “SEL” button until “TN1r” is displayed. Push

the Enter button (>) to select the current value.

Push “UP” or “DOWN” button and set Ramp time

1 in hours and minutes in the format "X.XX"

(hour.minutes). This is the time Ramp 1 will take

to reach Setpoint 1. Push the Enter button to

enter the set value as the current value.

Push “SEL” button until “TN1S” is displayed. Push

the Enter button (>) to select the current value.

Push “UP” or “DOWN” button and set Dwell time

1 in hours and minutes in the format "X.XX"

(hour.minutes). Push the Enter button to enter

the set value as the current value.

Set “Sü-2” “TN2r” “TN2S” “Sü-3” “TN3r” “TN3S”

“Sü-4” “TN4r” and “TN4S” in the same manner as

“Sü-1” “TN1r” “TN1S”.

Program Execution

Push “SEL” button until “ProG” is displayed.

Pushing “UP” or “DOWN” button, select "run."

When “run” is selected, the program will start from

the actual furnace temperature at that point in time.

Setpoint

While the program is in “run” or “Hold,” the setpoint

shown on the bottom display is the current working

setpoint.

4 RAMP & 4 DWELL PROGRAMMABLE MODELS
24

Program End

When the program ends, the controller will hold the

furnace at the value of Setpoint 4 until you stop the

program.

Program Stop

To stop program, push “SEL” button until “ProG” is

displayed. Push “UP” or “DOWN” button until “oFF”

is displayed. This will terminate program.

Self Tuning Feature

This programmable control has an automatic tuning

feature which installs optimum tuning parameters to

give the best temperature accuracy with your load

and setpoint or program. No manual loading of

tuning parameters is needed. Barnstead/

Thermolyne highly recommends using this

feature to provide the best temperature

accuracy the controller can attain. Use this

feature the first time you use your furnace and each

time you change your setpoint or program or the

type of load you are heating. To use the Tuning

feature:

1. Select the temperature at which you intend

to operate. If you will be running a

program, enter the value of Setpoint 1 as a

single setpoint.

2. Load your furnace with a characteristic

sample of the load you will be heating.

3. Push “SEL” button until “AT” is displayed,

then push “UP” or “DOWN” button to turn

“AT” “on.”

4 RAMP & 4 DWELL PROGRAMMABLE MODELS

The temperature control in

these models is a

programmable “and”

automatic single setpoint

device. When the program

has ended, the controller will

maintain the chamber

temperature at a value equal

to the last programmed level

(Setpoint 4) until the program

is cancelled. It will not

automatically cool to ambient

unless Setpoint 4 is set at

ambient. When a program is

cancelled, the controller will

maintain the chamber

temperature at a value equal

to the single setpoint mode

setpoint.

Note

Note

For processes which cannot

tolerate the overshoot

naturally generated during

the tuning process, select

"Lo" rather than "on" for the

"AT" setting. The "Lo" setting

will tune your furnace at a

temperature below your

setpoint, then apply the

result to your setpoint. This

approach prevents the

necessary tuning overshoot

from exceeding your actual

setpoint.
25

During the operation, “TunE” flashes in the lower

display. Do not make any adjustments to the

controller parameters during this period. The self

tuning is finished when “TunE” no longer flashes in

the lower display.

Self tuning will calculate values for:

Proportional band - P

Integral - i

Derivative - d

• Self tuning cannot be initiated while

running a program.

• A power failure will cause the AT

parameter to revert back to “OFF”. (Reset

tune parameter to “ON” using the “UP”

button).

• In the case of alarm conditions during

tuning, those conditions will flash

alternately with "TunE."

The next time you use your furnace, push “SEL”

button until “AT” is displayed, then push “UP” or

“DOWN” button to turn tune “oFF.”

4 RAMP & 4 DWELL PROGRAMMABLE MODELS
26

This furnace controller consists of a

microprocessor-based three-mode (Proportional,

Integral, Derivative), programmable control with

overtemperature protection and appropriate output

switching devices to control the furnace. The upper

digital display indicates the measured chamber

temperature and the lower display indicates the

main setpoint temperature unless the scroll button

is depressed. (See Figure 4.)

The programmable control can be used as a

single setpoint control or as a programmable

control.

Single Set Point Operation

To use as a single set point control, simply push up

or down buttons to choose a specific temperature.

1. The setpoint temperature presently set in

the control will be read out on the lower

display.

8 Ramp & 8 Dwell MultiProgrammable Models

Figure 4: Multi-Programmable Control (8 ramp & 8 dwell)

Note

To change from °C indication

to °F indication, contact

Barnstead/Thermolyne.

Alarm Active Temperature Setpoint

Screw Retaining Instrument in Sleeve

Furnace Chamber

Temperature

(At Startup, Displays

Software Version

Number)

Digital

Communications

Condition of Program,

Ramp or Dwell and if

Program is Held, Ramp

Dwell Segment Currently

Running

Up Button

Run/Hold Button

Down Button

Parameter

Selected on

Secondary Display:

SP = Setpoint

OP = Output Power

Time = Time

Remaining in

Program

Adaptive or Self

Tune Selected (AT)

Scroll Button

Nonfunctional
27

2. To change this set point, depress the “UP”

or “DOWN” push button until the desired

setpoint value is displayed, then release

the button.

3. At this point the furnace will begin to heat

if the new set point temperature you have

chosen is higher than the present chamber

temperature.

4. The upper display indicates actual furnace

temperature.

The two center push buttons are inactive and not

used.

Programmed Operation

Control Parameters

Control parameters are viewed and changed

using the “SCROLL” button. If the scroll button is

depressed and released, the lower display will

indicate output power (OP) or setpoint (SP). This is

referred to as the “short scroll.” Continued single

step action of scroll button will cause lower display

to alternate between setpoint (SP) and output

power (OP).

To enter the main scroll list (list of all controller

parameters that are accessed through front

keyboard), the scroll button should be held

depressed. Pnr1 (program number 1) will appear.

To progress through the parameter list, release the

scroll button, then use single step depression to

advance through the list. You can rapidly progress

through the parameter list by holding the scroll

button depressed. For all the parameters, pushing

the up or down button will give current setting.

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS

Note

The furnace will begin to

heat to the current setpoint

temperature when you turn

the power switch "ON." To

examine the control

parameters without heating

the furnace, depress and

hold the “DOWN” button until

the setpoint (lower) display

reads "20".

Do not exceed limitations for

continuous or intermittent

operating temperature

shown in the General

Specifications. Exceeding

these limits will result in

severely reduced heating

element life.

Caution
28

The temperature control parameter values in

order are:

Pnr 1 - Program number. By pushing the up or

down button, you can select a program from 1 to

4. Each program will contain independently the

following parameters:

PR1 - Program Ramp Rate. The rate of heat

increase or decrease in °C/minutes.

PL1 - Program Level. The temperature to which

the furnace needs to attain.

PD1 - Program Dwell 1. Amount of time in minutes

to hold PL1 program level temperature entered.

The remaining Program Ramp Rates PR2 - PR8,

Program Levels PL2 - PL8, and Program Dwells

PD2 - PD8 follow with the same structure as PR1,

PL1, and PD1.

Cnt - Continued. Allows linking of programs. Cnt

may be selected as “y” (yes) or “n” (no) by

pushing the up or down button.

HB - Holdback. Automatically places the controller

into “Hold” if the measured value deviates more

than a specified amount from controller setpoint.

When measured value re-enters the holdback

band, the timing for the segment resumes.

(Parameter is expressed in °C and only functions

when running a program).

PLC - Program Loop Count. The number of times

a program will be repeated.

SP1 - Setpoint One. Indicates current setpoint.

SP2 - Setpoint two. Not configured into control and

nonfunctional.

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS

Note

When examining the

parameters, if you depress

and release either the “PAR,”

“UP,” or “DOWN” buttons

and more than 6 seconds

elapse before the buttons

are used again, the display

screen will automatically

switch to displaying chamber

temperature. If this happens,

you will have to step through

each parameter until you

reach the point at which the

interruption occurred. The

parameter values you

checked earlier, however,

will not be lost or altered.

Holding down on “PAR”

allows longer viewing time.

Note

Once the desired parameter

has been selected,

depressing either the raise or

lower button will cause the

parameter to be replaced

with the new value. At this

point, the “top dot” of the

least significant digit of the

secondary display will flash

on and off. Any further use of

up or down buttons will

change parameter value. In

all cases, the value shown

on the display is the current

working value of that

parameter.
29

ST - Self Tune. Automatically loads PID values on

initial start up. (See Furnace Operation for

function of Self Tune).

AT - Adaptive Tune. Analyzes and inputs optimum

PID values when temperature has reached

setpoint. (See Furnace Operation for function of

Adaptive Tune).

SAT - Self Adaptive Tune. When engaged, starts

controller off in self-tune mode then automatically

switches to Adaptive Tune (AT). (See Furnace

Operation for function of Self Adaptive Tune).

ATR - Adaptive Tune Band setting. Determines

the operational band width of the adaptive tuning

function. Self-tuning automatically determines

this setting.

AL1 - Alarm 1. A full scale alarm which protects

load and furnace when temperature exceeds

preset value. Furnace will control temperature at

the preset temperature value; it will not shut off

furnace.

The next three parameters – Proportional (PB)

Integral (+i) and Derivative (+d) – are for high

accuracy control. Self-Adaptive Tuning will change

these parameters to their optimum values. You

should not change them; doing so may cause your

controller to operate incorrectly.

The next two parameters – cutback low (cbl) and

cutback high (cbh) – are to aid the control in

preventing temperature overshoots and

temperature undershoots. The point from setpoint

where the power starts “cutting back” is defined as

the cutback value. These values are also

automatically adjusted by the Self Tune and

Adaptive Tune features. These values cannot be

changed by the user; the controller automatically

installs optimum cutback values when in Self and

Adaptive Tuning.

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS
30

HL - Output Power limits the average maximum

power that is applied to the heating elements.

Normal setting is 100%. If you plan to use the

furnace below 260°C (500°F) the output power

may be reduced. This will significantly shorten

the time it takes for stabilization. It will also

reduce drastic temperature overshoots. Contact

Barnstead/Thermolyne Customer Service for

advice on the proper value to use. Remember

that this parameter does not reduce the voltage

to the elements. It reduces the average power to

the elements by cycling power on and off.

HC - Cycle Time is the rate at which power is

supplied to power control switch.

Sbr - the percent of power that is supplied to the

control output terminals if an open

thermocouple condition exists. Push up or

down button. 0.0 will be displayed. This

parameter cannot be changed; if 0.0 is not

displayed, contact Barnstead/Thermolyne. The

upper display will flash “OR” if an open

thermocouple condition exists.

Programming Controller

The multi-programmable controller in these units

provides up to 4 separate programs of 8 ramps and

8 dwells each. This controller also allows you to link

programs together, which allows you to achieve 64

total segments (4 programs X 16 segments). These

functions are controlled by two of the controller’s

programming parameters, “Pnr” and “Cnt.”

To run a program, first determine your ramp rate,

dwell times and program levels. It is helpful to

graph your program out for ease of loading program

into controller.

A maximum of 8 ramp and 8 dwell segment

combinations are available per program, thus

enabling eight different setpoint levels to be

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS
31

achieved. Each ramp is programmed by specifying

the program level (PL) and the required ramp rate

(PR). The controller then automatically calculates

the time that is required to attain the program level

(PL) based on the desired ramp rate (PR). Dwell

segments (soak) then can be attached to each

program level (PL) to hold that temperature for a

specified time.

To select program number

Push scroll button until “Pnr 1” is displayed. Push

the up or down button to select a program number

from 1 to 4.

To link programs together

Push scroll button until “Cnt n” is displayed. Press

and release the up and down buttons to switch

between “Cnt y” (continue yes) and “Cnt n”

(continue no). The effect of selecting “Cnt y” is to

continue the program to the next program number.

For example, if in program #3 you select “Cnt y,”

when program #3 is complete, program #4 will run

automatically. Setting “Cnt y” in program #4 will

initiate the start of program #1 upon the completion

of program #4. Each program will complete the

selected number of loops before continuing (see

Loop Count). If you do not want to link programs,

set Cnt to “Cnt n” (continue no).

Program Entry

1. With the controller not operating, indicated

by the bottom right hand side of the

display extinguished, depress scroll button

until PR1 is displayed. Push the up or

down button to scroll to the desired value,

which is degrees per minute.

Scrolling down below zero will give three other

options for the ramp:

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS
32

NONE-which will force the program to skip

to the next segment;

END-which will cause the program to stop

or restart if loops remaining is not zero;

STEP-which will cause the program to

step to the next program level.

All other ramps in the program are set in a similar

fashion by selecting “PR” followed by the relevant

ramp number.

2. The level to which the first ramp is aiming

is entered by scrolling through the main

scroll list until “PL1” is displayed. By

pressing either the up or down button the

present value of this level is indicated in

display units. Using the up or down button

will scroll the present value to the new

value required. All other levels in the

program are set in a similar fashion by

selecting “PL” followed by the relevant

number.

3. To set the dwell time for the first level,

scroll through the main scroll list until

“Pd1” is displayed. Pressing the up or

down button will reveal the current value of

time in minutes. Using the up or down

button will scroll the present value to the

new value required. Scrolling this value

down will allow a setting of “END.” A

setting of “END” will terminate the

program, or force it to restart if loops

remaining are not zero at the beginning of

that dwell.

All other dwells in the program can be set in a

similar fashion by selecting “PD” followed by the

relevant dwell number.

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS
33

4. Scrolling through the main scroll until the

parameter “PLC” is displayed and then

depressing the up or down button will

reveal the present setting of the loop

count. This is the number of times that the

entered program will be repeated before a

continuous setpoint at the last level of the

program is achieved. By pushing the up or

down button the number of loops can be

set at any value from 1 to 999.

Holdback

This controller features a “holdback” (Hb) function

to ensure programmed parameter values are

adhered to. Holdback is set in display units

(degrees) and represents the allowable excursion

of measured value away from the current setpoint,

either above or below, before the program is forced

into hold (clock stops).

The program will remain in hold until the

measured value comes within the holdback band

(clock starts). This feature is active the whole time

that the program is running. (Holdback functions

only while running a program).

Scroll through the main scroll list until “HB” is

displayed. Push the up or down button to reveal the

current value of holdback. The up or down button

can now be depressed to scroll to the required

value. Select desired holdback setting – a setting of

20° is recommended. Holdback is set in display

units and represents the allowable excursion of

measured value away from the current setpoint,

either above or below, before the program is forced

into hold. The program will remain in hold until the

measured value comes within holdback limits. This

feature is active the whole time that the program is

running. When hold is forced onto the program by

holdback, the “HOLD” legend is not illuminated, but

either the “RAMP” or “DWELL” legend will flash.

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS
34

When the program is in “holdback,” it effectively

lengthens the time of the program – if the holdback

band “Hb” is set too low, the program will never

escape the holdback band, thus the program will

never be completed. If you do not want to use the

holdback function, set “Hb” to an extremely large

value.

Program Execution

Once the program has been entered it can be run

by depressing the “RUN/HOLD” push button on the

front.

With the run initiated, the program will commence

and the legend on the display will indicate if a ramp

or dwell is being performed. While a program is

running, the short scroll will contain a third

parameter “TIME.” Push the scroll button once; time

remaining for the current segment, either ramp or

dwell, will be indicated. If the loop counter has been

set to any value other than one, then the above

procedure will be repeated for each loop.

At the end of the complete program, an “E” will

appear on the display.

Parameter Change While Running

The previous parameters can be inspected but not

changed while a program is running. If it is

necessary to alter a parameter while a program is

running, the program must be placed into the hold

condition. To put program into hold, push the “RUN/

HOLD” button once. After modification of the

parameter, returning the program to the run state

will cause the program to continue with the

changed value(s) installed. Push “RUN/HOLD”

button again to restart program.

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS

Note

Be sure to select the

program number before

pressing “RUN/HOLD”.

The temperature control in

these models is a

programmable “and”

automatic single setpoint

device. When the program

has ended, the controller will

maintain the chamber

temperature at a value equal

to the last programmed level

(PL) until the program is

cancelled. It will not

automatically cool to ambient

unless last programmed

level (PL) is set at ambient.

When a program is

cancelled, the controller will

maintain the chamber

temperature at a value equal

to the main setpoint (SP1 or

SP). To cancel a program,

depress and release the

“UP” and “DOWN” push

buttons simultaneously. Be

sure single set point mode is

set to 20 degrees as

described earlier in this

manual.

Note
35

Loop Count

If the loop count is set to values other than one,

then the number of loops remaining in a running

program can be displayed. To determine which loop

is being performed depress scroll button until "LR"

is displayed and by pushing either the up or down

button the remaining number of loops, excluding

the one being executed, is displayed.

Program Hold

A running program can be forced into hold at any

stage by depressing the “RUN/HOLD” push button

on the front. When a running program is forced into

hold, the “HOLD” legend will appear on the display

together with the segment type and will be flashing.

Pushing “RUN/HOLD” button again will return the

program to a run situation and extinguish the

“HOLD” legend.

Program Reset

A running, held or finished program can be reset by

depressing the up and down push buttons together.

When the reset has been enabled, the parts of

the display associated with programming will be

extinguished and the controller will operate as a

single setpoint control.

SAT Self Adaptive Tuning

This programmable control has automatic tuning

features which install optimum tuning parameters to

give the best temperature accuracy with your load

and setpoint. No manual loading of tuning

parameters is needed. Thermolyne highly

recommends using these features to provide

the best temperature accuracy the controller

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS
36

can attain. Use this feature the first time you use

your furnace and each time you change your

setpoint or program or the type of load you are

heating.

The following paragraphs instruct you on how to

initiate the SAT Self and Adaptive Tuning feature.

This feature starts the controller in the Self Tune

mode then automatically switches over to the

Adaptive Tuning Feature.

Self Tuning is a one-time function which permits

you to retune the instrument control parameters to

suit new process conditions. Adaptive tuning takes

over when the self tune is completed and

continuously reevaluates the tuned parameters.

Adaptive tuning will then automatically install new

values if a better response could have been

attained. To use the tuning features:

1. Depress scroll button until SAT is

displayed. Depress the up and down

buttons simultaneously to start self tuning.

The A-T indicator is then illuminated

(upper right hand corner) and the lower

display indicates the setpoint at which the

self-tune sequence will occur. The “SP”

indicator will flash for 1 minute, during

which time the setpoint may be changed if

it is required to retune at a new setpoint

either above or below the process value

indicated on the upper display (use

temperature setpoint that your application

requires). At the end of the minute, the

“SP” indicator will stop flashing, indicating

that the setpoint can no longer be

changed. The A-T indicator will start

flashing and continue to flash until the self

tune has completed. Once the self tune is

completed, adaptive tune takes over and

the A-T indicator will remain illuminated.

To stop tuning, function scroll until SAT is

displayed and simultaneously push up and down

buttons.

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS
37

For best results, use only the center two-thirds of

the furnace chamber.

If you are heating a number of small parts,

spread them throughout the center two-thirds of the

furnace chamber.

Keep objects away from the thermocouple.

Use insulated tongs and mittens when loading

and unloading the furnace.

Always wear safety glasses.

Never come into contact with the heating

elements. Hitting the elements with tongs or laying

the load against them will cause the elements to

burn out prematurely.

Furnace Loading

Do not overload your furnace

chamber. If the load is to be

heated uniformly, it should

not occupy more than twothirds of the furnace

chamber. Maintain at least a

3/4 inch gap between the

load and elements. Failure to

observe this caution could

result in damage to furnace

components.

Caution

Heating Elements

Thermocouple Sample Port

Thermocouple
38

This unit is equipped with a venting system on the

top of the furnace. This is for the removal of fumes

from the chamber of the unit. Contamination is a

major cause of element failure, therefore, remove

all fume forming material before heating. (e.g. clean

cutting oil from tool steel).

Housekeeping is vital to your electric furnace –

KEEP IT CLEAN. Run your furnace up to 871°C

(1600°F) empty occasionally to burn off the

contamination that may exist on the insulation and

elements. Maintain 871°C (1600°F) for at least 4

hours to insure complete ashing of foreign

materials.

Element life is reduced somewhat by repeated

heating and cooling. If the furnace is to be used

again within a few hours, it is best to keep it at the

operating temperature or at a reduced level such as

260°C (500°F).

Thermolyne highly recommends that you replace

the thermocouple periodically (once every six

months) to ensure temperature accuracy.

General Cleaning Instructions

Wipe exterior surfaces with lightly dampened cloth

containing mild soap solution.

Preventative Maintenance
39

The Problem Solving Tips section is intended to aid in defining and correcting possible

service problems. When using the chart, select the problem category that resembles the

malfunction. Then proceed to the possible causes category and take necessary corrective

action.

Problem Solving Tips

PROBLEM POSSIBLE CAUSES CORRECTIVE ACTION

The cycle light does not illuminate. The furnace is not connected to

power supply.

Incorrect power source.

ON and OFF power switch

defective.

Defective cycle light.

Door switch defective.

Reconnect furnace to power

supply.

Connect to correct power source.

Replace power switch.

Replace cycle light.

Re-align or replace furnace door

switch.

The furnace does not heat. No power.

Defective electrical hookup.

Thermocouple has oxidized and

opened the circuit.

Controller malfunction.

Heating elements in 208V, 230V or

240V furnaces are burned out.

Door switch malfunction. 

Defective safety relay.

Defective solid state relay.

Check power source and fuses or

breakers.

Repair electrical hookup.

Replace thermocouple.

Replace controller.

Replace defective elements.

Re-align or replace door safety

switch.

Replace safety relay.

Replace output relay.

Door switch does not cut power to

heating elements.

Door switch is not functioning.

Safety relay malfunction.

Re-align or replace door safety

switch.

Replace safety relay.
40

PROBLEM SOLVING TIPS

PROBLEM POSSIBLE CAUSES CORRECTIVE ACTION

Controller over-temperature alarm

does not cut power to furnace

chamber.

Alarm output device malfunction.

Mechanical relay malfunction.

Element shorted to ground.

Replace control unit.

Replace mechanical relay.

Replace faulty element.

Slow heatup. Low line voltage.

Heavy load in chamber.

Wrong heating element.

One heating element is burned out

in 100V & 120V furnace.

Install line of sufficient size and

proper voltage. (Isolate furnace from

other electrical loads.)

Lighten load in chamber to allow

heat to circulate.

Install proper element.

Replace burned out element.

Repeated element burnout. Overheating furnace.

Heating harmful materials.

Contamination present from

previous burnout.

Keep furnace under maximum

temperature. Closer supervision of

control setting.

Enclose material in container. Clean

up spills in and on chamber.

Ventilate chamber by leaving top

vent slightly open when heating

known harmful reagents.

Replace insulation material.

Inaccurate temperature readout. Oxidized or contaminated

thermocouple.

Poor thermocouple connection.

Improper loading procedures.

Poor ventilation of base.

Thermocouple connections

reversed.

Replace thermocouple.

Tighten connections.

Use proper loading procedures.

Clear area around furnace base.

Reconnect thermocouple correctly.
41

To Replace a Heating Element:

1. Disconnect the furnace from the power

supply.

2. Remove the back terminal cover of the

furnace. (Note placement and connection

of wires.)

3. Loosen the nuts on the terminal points of

the four heating element lead wires and

remove the element wires from the

terminals.

4. Loosen the thermocouple hold-down clip

and carefully remove the thermocouple

from the rear of the furnace chamber.

5. Remove both the back of the furnace and

the blanket insulation.

6. Grasp the element lead wires and pull out

both elements and the back chamber

insulation.

7. Replace the defective element.

Maintenance and Servicing

Warning

To avoid electrical shock,

this furnace must always be

disconnected from the power

supply prior to maintenance

and service.

Perform only maintenance

described in this manual.

Contact an authorized dealer

or our factory for parts and

assistance.

Refer servicing to qualified

personnel.
42

8. Reverse the disassembly procedure,

making sure you thread all element lead

wires through the insulating porcelain

bushings on the back of the furnace and

cut off any excess element lead wire after

securing the leads to the terminal points.

9. Reconnect the furnace to the power

supply.

10. Test the operation of the furnace.

To Replace a Chromel/Alumel

Thermocouple (All Furnaces):

1. Disconnect the furnace from the power

supply.

2. Remove both back covers. (Note

placement and connection of wires.)

3. Remove the clip holding the thermocouple

in place (1 screw), and remove the two

screws on the thermocouple terminals.

MAINTENANCE AND SERVICING
43

4. Remove the thermocouple (Note: first pull

the thermocouple straight out of the hole in

the chamber to avoid damage to the

insulation.)

5. Guide the looped ends of the new

thermocouple through the plastic bushings

with the red (-) lead to the right as you

face the back of the furnace.

6. Form a 90° bend towards the furnace, with

the red (-) lead to the right. Insert the

thermocouple straight through the hole in

the chamber.

7. Secure the thermocouple with clip and

screw. Connect the looped ends of the

thermocouple to the terminals with +

 to +

(yellow) and - to - (red). (A polarity test of

the thermocouple and lead wire is easily

made with the use of a magnet. On

Chromel/Alumel thermocouples and lead

wire, the non-magnetic wire is positive (+

)

and the magnetic wire is negative (-).)

8. Replace both back covers.

MAINTENANCE AND SERVICING

Thermocouple Leads

+

_
44

9. Reconnect to the power supply.

10. Test the operation of the furnace.

To Replace Door Switch (Micro-Switch):

1. Disconnect the furnace from the power

supply.

2. Remove the two top screws on the front

dial and the two bottom screws and 1 lock

washer on the back cover.

3. Slide the control section forward. (Note: do

not pull excessively on the internal wires.)

4. Disconnect the wires from the door switch.

(Note the connection placement of the

wires to the micro-switch.)

5. Remove the two screws, lock washers and

nuts from the micro-switch.

6. Insert a new micro-switch and secure with

the screws, lock washers and nuts

removed in step 5.

MAINTENANCE AND SERVICING
45

MAINTENANCE AND SERVICING

7. Reconnect the wires identified or marked

in step 4 to the new door switch.

8. To realign the door switch, see the

following section: To Realign Door

Switch.

9. Slide the control section back and replace

the screws and lock washer described in

step 2.

10. Reconnect to the power supply.

11. Test the operation of the door switch. (See

next section, step 10.)

To Realign Door Switch (Micro-Switch):

1. Disconnect the furnace from the power

supply.

2. Remove the two top screws on the front

dial and the two bottom screws and lock

washer on the back cover.

Door Switch
46

3. Slide the control section forward. (Note: do

not pull excessively on the internal wires.)

4. With the door closed, loosen the screws

on the micro-switch and slide the switch

downward, so that the screws are at the

bottom of the slots in the mounting

bracket.

5. Finger tighten both screws. While holding

down the rear of the micro-switch housing,

gently push up on the front of the switch

until you hear a click.

6. Open and close the door; the switch

should click when the door is opened

approximately 3" and 1" to 2” before the

door is closed. Slide the front of the switch

up to increase the distance, down to

decrease the distance.

7. Tighten the two screws to secure the

micro-switch. Check the operation of the

switch as described in step 6 after

tightening the screws.

MAINTENANCE AND SERVICING
47

8. Slide the control section back and replace

the screws and lock washer described in

step 2.

9. Reconnect to power supply.

10. To test the operation of the door switch:

turn the power switch on, set the control to

a setting high enough to keep the control

from cycling, open and close the door; the

cycle light should turn off when the door is

opened approximately 3" and turn back on

1” to 2” before the door is closed.

To Replace the Automatic or

Programmable Controller:

The controller plugs into a panel mounting sleeve

which should be left permanently installed in the

furnace housing. To remove the controller, grasp

the top and bottom of the controller front, squeeze

together and pull out. Do not attempt to dismantle

this unit further, but replace it either with a

Thermolyne loaner or a new unit.

Note

To gain access to control

section components, simply

remove the two top screws

on the front dial and the two

bottom screws (with one lock

washer) on the back cover.

Slide control section forward.

Do not pull excessively on

the internal wires.

MAINTENANCE AND SERVICING
48

Replacement Parts List

*Basic automatic control models include:

F47910, F47910-26, F47910-33, F47914, F47915, F47918

F48010, F48010-26, F48010-33, F48014, F48015, F48018

P N ART NO. D N ESCRIPTIO MODELS USED O

C s N71X49 Control module, auto. model

F47920, F47920-26, F47920-33,

F47924, F47925,

F47928, F48020, F48020-33

F48020-26, F48024,

F48025, F48028

CNX151 Control module, programmable

models (4 ramp & 4 dwell)

F47920-80, F47920-26-80, F47920-33-80,

F47924-80, F47925-80,

F47928-80, F48020-80,

F48020-26-80, F48020-33-80, F48024-80,

F48025-80, F48028-80

CN71X57

Control module, mulit-programmable

w/communication option (8 ramp/8

dwell)

F47950, F47950-26, F47950-33

F47954, F47955,

F47958, F48050,

F48050-26, F48050-33, F48054,

F48055, F48058

E ) L479X1A H s eating element, side (2 req'd. 120, 220-240V, 47900 model

E ) L479X2A H s eating element, side (2 req'd. 100 & 208 V, 47900 model

E ) L480X1A H s eating element, side (2 req'd. 120, 220-240V, 48000 model

E ) L480X2A H s eating element, side (2 req'd. 100 & 208V, 48000 model

S h W356X1A D s oor safety switc All model

T K C357X1A T s hermocouple, type All model

P ) C750X1A P 5 C board (basic automatic control F47915, F4801

P ) C750X2A PC board (basic automatic control F47910, (-26) & (-33), F48010, (-26) & (-33)

P ) C750X3A P 4 C board (basic automatic control F47914, F4801

P ) C750X4A P 8 C board (basic automatic control F47918, F4801

P ) LX76 Cycle light (amber All 100 & 120V models except basic

automatic control models*

P ) LX82 Cycle light (amber All 208, 220-240V models except basic

automatic models*

R y YX56 Mechanical Rela All 100 & 120V models except basic

automatic control models*

R y YX57 Mechanical Rela All 208, 220-240V models except basic

automatic control models*

R y YX34 Solid State Rela All models except basic automatic control

models*

R y YX54 Solid State Rela All basic automatic control models*

S h WX68 ON/OFF power switc All models except basic automatic control

models*

S h WX134 O 5 N/OFF power switc F47914, F47915, F48014, F4801

S h WX144 ON/OFF power switc F47910, (-26) & (-33), F47918,

F48010, (-26) & (-33), F48018

S h W745X1A Push to Set Temp. switc All basic automatic control models*

R t S745X1A Temp. Setpoint Adjust. rheosta All basic automatic control models*

SWX163
49

Wiring Diagrams

Basic Automatic Control Models

F47910, F47910-33, F47910-33, F47914, F47915, F47918

F48010, F48010-33, F48010-33, F48014, F48015, F48018 DESCRIPTION REF. NO. CN1 CONTROL DIAGRAM COMPONENT LIST DS1 PILOT LIGHT

HEATING ELEMENT H1RESISTOR, POT R1

RY1 RELAY, SOLID STATE

SWITCH, POWER S1

S2 SWITCH, DOORS3 SWITCH, DOORTB1 TERMINAL BLOCK

TC1 THERMOCOUPLE

J6

S4

R1

CN1

GND

J3

HIJ1

AC

J2

LOW

J5

AC

J8 J9

- +

J7

SSR

YEL.

+

J4

-

RED

TB1

YELLOW

RED

TC1

S1 1 2

- 4 3 +

RY1

DS1

S2

HEATING ELEMENT H2

H1 H2

T2 T3

100/120V

T2 T3

H1 H2

208/240V

T4 T1

T1 T4

L1L2

GND

GND

F47910-33

ONLY

FL1 FILTER

S3

S4 SWITCH, SET POINT

F1 FUSEF2 FUSE

FL1 GND

L1L2

F2F1

MODEL NO. AND OUR PART NO. (s)

REF. NO. DESCRIPTION F48010 F48010-33 F48014 F48015 F48018CN1 CONTROL PC750X2A PC750X2A PC750X3A PC750X1A PC750X4ADS1 PILOT LIGHT PLX82 PLX82 PLX76 PLX76 PLX82F1 FUSE FZX30F2 FUSE FZX30FL1 FILTER CAX98H1 HEATING ELEMENT EL480X1A EL480X1A EL480X2A EL480X1A EL480X2AH2 HEATING ELEMENT EL480X1A EL480X1A EL480X2A EL480X1A EL480X2AR1 RESISTOR, POT RSX314 RSX314 RSX314 RSX314 RSX314RY1 RELAY, SOLID STATE RYX54 RYX54 RYX54 RYX54 RYX54S1 SWITCH, POWER SWX144 SWX144 SWX143 SWX143 SWX144S2 SWITCH, DOOR SWX163 SWX163 SWX163 SWX163 SWX163S3 SWITCH, DOOR SWX163 SWX163 SWX163 SWX163 SWX163S4 SWITCH,SET POINT SWX63 SWX63 SWX63 SWX63 SWX63TB1 TERMINAL BLOCK TRX136 TRX136 TRX136 TRX136 TRX136TC1 THERMOCOUPLE TC357X1A TC357X1A TC357X1A TC357X1A TC357X1A
50WIRING DIAGRAMS

LINE

LOAD

TC- TC+

GND

GND

TC1

T3T4

T2T1

H1

234

5

CN1

RY1

CYCLE

RY2

4

3

12

+

WIRING DIAGRAM

NOTES:DASHED LINES " "DENOTE 100/120 V.WIRE CONNECTIONS.

1

7

9

10

6

8

12 11

CN1DS1H1H2RY1

RY2S1S2

CONTROLPILOT LIGHT, NEON

HEATING ELEMENTHEATING ELEMENTRELAY, DPST, N.O.SOLID STATE RELAYSWITCHDOOR SWITCH

DIAGRAM COMPONENT LISTREF.NO.

DESCRIPTION

H2

FL1 FILTER, EMI

LINE

L1L2

GND

F47920-33

 ONLY 

DOOR SWITCH

F1

S3

FUSE

F2 FUSE

DS1

G

LINE

L1L2

G

GND

S2S3

L1 L2

S1

FL1

F1F2

THERMOCOUPLE TC1

Automatic Models

F47920, F47920-33, F47924, F47925, F47928,

F48020, F48020-33, F48024, F48025, F48028 MODEL NO. AND OUR PART NOS (s) REF. NO. DESCRIPTION F48020 F48020-33 F48024 F48025 F48028 CN1 CONTROL CNX146 CNX146 CNX146 CNX146 CNX146 DS1 PILOT LIGHT, NEON PLX82 PLX82 PLX76 PLX76 PLX82 F1 FUSE FZX30 F2 FUSE FZX30 FL1 FILTER, EMI CAX94 H1 HEATING ELEMENT EL480X1A EL480X1A EL480X2A EL480X1A EL480X2A H2 HEATING ELEMENT EL480X1A EL480X1A EL480X2A EL480X1A EL480X2A RY1 RELAY, DPST, N.O. RYX57 RYX57 RYX56 RYX56 RYX57 RY2 SOLID STATE RELAY RYX34 RYX34 RYX34 RYX34 RYX34 S1 SWITCH, POWER SWX144 SWX144 SWX143 SWX143 SWX144 S2 SWITCH, DOOR SWX163 SWX163 SWX163 SWX163 SWX163 S3 SWITCH, DOOR SWX163 SWX163 SWX163 SWX163 SWX163

TC1 THERMOCOUPLE TC357X1A TC357X1A TC357X1A TC357X1A TC357X1A
51

WIRING DIAGRAMS

Programmable Models (4 Ramp & 4 Dwell):

F479020-80, F47920-33-80, F47924-80, F47925-80, F47928-80

F48020-80, F48020-33-80, F48024-80, F48025-80, F48028-80

LINE

LOAD

TC- TC+

GND

GND

TC1

T3T4

T2

T1

H1

2345

CN1

RY1

CYCLE

RY2 4

3

12

+

WIRING DIAGRAM

NOTES:DASHED LINES " "DENOTE 100/120 V.WIRE CONNECTIONS.

1

79

10

68

11 12

CN1DS1H1H2

RY1RY2S1S2

CONTROLPILOT LIGHT, NEONHEATING ELEMENT

HEATING ELEMENTRELAY, DPST, N.O.SOLID STATE RELAYSWITCHDOOR SWITCH

DIAGRAM COMPONENT LIST

REF.NO.

DESCRIPTION

H2

FL1 FILTER, EMI

LINE

L1L2

GND

F47920-33-80

 ONLY 

THERMOCOUPLE

F1

TC1

FUSE

F2 FUSE

DS1

G

LINE

L1L2

G

GND

S2S3

L1 L2

S1

F1F2

FL1

S3 DOOR SWITCH

MODEL NO. AND OUT PART NO. (s)

REF. NO. DESCRIPTION F48020-80 F48020-33-80 F48024-80 F48025-80 F48028-80CN1 CONTROL CNX151 CNX151 CNX151 CNX151 CNX151DS1 PILOT LIGHT, NEON PLX82 PLX82 PLX76 PLX76 PLX82F1 FUSE FZX30F2 FUSE FZX30FL1 FILTER, EMI CAX94H1 HEATING ELEMENT EL480X1A EL480X1A EL480X2A EL480X1A EL480X2AH2 HEATING ELEMENT EL480X1A EL480X1A EL480X2A EL480X1A EL480X2ARY1 RELAY, DPST, N.O. RYX57 RYX57 RYX56 RYX56 RYX57RY2 SOLID STATE RELAY RYX34 RYX34 RYX34 RYX34 RYX34S1 SWITCH, POWER SWX144 SWX144 SWX143 SWX143 SWX144S2 SWITCH, DOOR SWX163 SWX163 SWX163 SWX163 SWX163S3 SWITCH, DOOR SWX163 SWX163 SWX163 SWX163 SWX163TC1 THERMOCOUPLE TC357X1A TC357X1A TC357X1A TC357X1A TC357X1A
52WIRING DIAGRAMS

Programmable Models (8 Ramp & 8 Dwell):

F47950, F47950-33, F47954, F47955, F47958

F48050, F48050-33, F48054, F48055, F48058

LINE

LOAD

TC- TC+

GND

GND

TC1

T3

T4

T2

T1

H1

356

CN1

RY1

CYCLE

RY2 4

3

1

2

+

WIRING DIAGRAM

NOTES:

DASHED LINES " "DENOTE 100/120 V.WIRE CONNECTIONS.

1 31

33

26

18 25

CN1DS1

H1H2RY1RY2

S1S2

CONTROL

PILOT LIGHT, NEONHEATING ELEMENTHEATING ELEMENTRELAY, DPST, N.O.SOLID STATE RELAY

SWITCHDOOR SWITCH

DIAGRAM COMPONENT LIST

REF.

NO.

DESCRIPTION

H2

FL1 FILTER, EMI

LINE

L1L2

GND

F47950-33

 ONLY 

DOOR SWITCH

F1

S3

FUSE

F2 FUSE

DS1

G

LINE

L1L2

G

GND

S2

S3

L1 L2

S1

GND

FL1

F1F2

THERMOCOUPLE TC1

MODEL NO. AND OUR PART NO. (s)

REF. NO. DESCRIPTION F48050 F48050-33 F48055 F48058CN1 CONTROL CN71X57 CN71X157 CN71X157 CN71X157DS1 PILOT LIGHT, NEON PLX82 PLX82 PLX76 PLX82F1 FUSE FZX30F2 FUSE FZX30FL1 FILTER, EMI CAX94H1 HEATING ELEMENT EL480X1A EL480X1A EL480X2A EL480X2AH2 HEATING ELEMENT EL480X1A EL480X1A EL480X2A EL480X2ARY1 RELAY, DPST, N.O. RYX57 RYX57 RYX56 RYX57RY2 SOLID STATE RELAY RYX34 RYX34 RYX34 RYX34S1 SWITCH, POWER SWX144 SWX144 SWX143 SWX144S2 SWITCH, DOOR SWX163 SWX163 SWX163 SWX163S3 SWITCH, DOOR SWX163 SWX163 SWX163 SWX163TC1 THERMOCOUPLE TC357X1A TC357X1A TC357X1A TC357X1A
53

Material Safety Data Sheet

Thermal Ceramics

Date Revised: 7/2/91

PRODUCT IDENTIFICATION

Trade Name(s): CERAFIBER

Generic Name: REFRACTORY CERAMIC FIBER INSULATION CAS #: 65997-17-3

Chemical Name: ALUMINA SILICA Formula: MIXTURE

Manufacturer: Thermal Ceramics Telephone: (404) 796-4200

Address: P.0. BOX 923, 2102 Old Savannah Road

City: Augusta State: Georgia Zip: 30903

PRODUCT INGREDIENTS

PHYSICAL DATA

Appearance and Odor: WHITE FIBER-NO ODOR.

Boiling Point: NA Evaporation Rate (NA = 1): NA

Vapor Pressure: NA Specific Gravity (water = 1 ): 2.6

Water Solubility (%): NIL Melting Point: >3000°F

Vapor Density (Air= l): NA % Volatile by Volume: 0

FIRE AND EXPLOSION DATA

HEALTH HAZARDS

Summary/Risks

Summary: EXPOSURE TO DUST FROM THIS PRODUCT SHOULD BE MINIMIZED. ANIMAL INHALATION AND ARTIFICIAL

IMPLANTATION STUDIES HAVE REPORTED THE DEVELOPMENT OF TUMORS. BASED ON PRELIMINARY RESULTS, A

NOTICE OF SUBSTANTIAL RISK HAS BEEN FILED WITH THE EPA ACCORDING TO SECTION 8(e) OF THE TOXIC

SUBSTANCES CONTROL ACT. BASED ON ANIMAL STUDIES, IARC HAS CLASSIFIED RCF AS POSSIBLY CARCINOGENIC

FOR HUMANS (2B). DATA FROM HUMAN EPIDEMIOLOGICAL STUDIES IS INSUFFICIENT. THIS SUBSTANCE OR MIXTURE

HAS NOT BEEN CLASSIFIED A CARCINOGEN BY NTP OR OSHA.

Medical conditions which may be aggravated: AS WITH ANY DUST, PRE-EXISTING UPPER RESPIRATORY AND LUNG DISEASES

MAY BE AGGRAVATED.

Target Organ(s): LUNGS, SKIN AND EYES .

Acute Health Effects: PRODUCT IS A MECHANICAL IRRITANT TO SKIN, EYES AND UPPER RESPIRATORY SYSTEM.

Chronic Health Effects: EXCESSIVE EXPOSURE TO RCF DUSTS AND AFTER SERVICE FIBERS MAY CAUSE LUNG DAMAGE

(FIBROSIS). IARC STATES THERE IS SUFFICIENT EVIDENCE IN ANIMALS AND LIMITED EVIDENCE IN HUMANS TO

CLASSIFY CRYSTALLINE SILICA AS A PROBABLE CARCINOGEN (2A) AND RCF AS A POSSIBLE CARCINOGEN (2B).

Primary Entry Route(s): INHALATION, SKIN AND EYE CONTACT.

Signs/Symptoms of Overexposure

Inhalation: IRRITATION OR SORENESS IN THROAT & NOSE. IN EXTREME EXPOSURES SOME CONGESTION MAY OCCUR.

Skin Contact: TEMPORARY IRRITATION OR RASH.

Skin Absorption: NA

Ingestion: NOT HAZARDOUS WHEN INGESTED. MAY CAUSE TEMPORARY IRRITATION TO GI TRACT.

Eyes: TEMPORARY IRRITATION OR INFLAMMATION
54

First Aid/Emergency Procedures

Inhalation: REMOVE TO FRESH AIR. DRINK WATER TO CLEAR THROAT AND BLOW NOSE TO EVACUATE FIBERS.

Skin Contact: WASH AFFECTED AREAS GENTLY WITH SOAP AND WARM WATER.

Skin Absorption: NA

Ingestion: NA

Eyes: FLUSH EYES WITH COPIOUS QUANTITIES OF WATER. IF IRRITATION PERSISTS CONSULT A PHYSICIAN.

REACTIVITY DATA

MATERIAL IS STABLE. HAZARDOUS POLYMERIZATION CANNOT OCCUR.

Chemical Incompatibilities: HYDROFLUORIC ACID

Conditions to Avoid: NONE IN DESIGNED USE.

Hazardous Decomposition Products: NONE

SPILL OR LEAK PROCEDURES

Procedures for Spill/Leak: VACUUM CLEAN DUST WITH EQUIPMENT FITTED WITH HEPA FILTER. IF SWEEPING IS NECESSARY

USE A DUST SUPPRESSANT.

Waste Management: WASTES ARE NOT HAZARDOUS AS DEFINED BY RCRA (40 CFR PART 261 ) . COMPLY WITH FEDERAL,

STATE & LOCAL REGULATIONS. METHOD OF DISPOSAL - LANDFILL. RQ - N/A.

SPECIAL PROTECTION INFORMATION

Goggles: GOGGLES OR SAFETY GLASSES WITH SIDE SHIELDS ARE RECOMMENDED.

Gloves: GLOVES ARE RECOMMENDED.

Respirator: <1 F/CC, USE 3M 9900; <10 F/CC, USE MSA COMFO II WITH H FILTER; <50 F/CC, USE MSA ULTR”At”WIN H FILTER;

OR EQUIVALENTS. SEE SECTION IX-OTHER.

Ventilation: USE SUFFICIENT NATURAL OR MECHANICAL VENTILATION TO KEEP DUST LEVEL TO BELOW PEL/TLV/WEG

(WORKPLACE EXPOSURE GUIDELINE) USE DUST COLLECTION WHEN TEARING OUT.

Other: WEAR LOOSE FITTING, LONG SLEEVED CLOTHING. WASH EXPOSED AREAS WITH SOAP & WARM WATER AFTER

HANDLING. WASH WORK CLOTHES SEPARATELY FROM OTHER CLOTHING; RINSE WASHER THOROUGHLY.

Special Considerations for repair/maintenance of contaminated equipment: CRISTOBALITE RESPIRATOR: <10X PEL, USE 3M

9900; <100X PEL, USE MSA ULTR”At”WIN H FILTER; OR EQUIV. SEE SEC IX-OTHER.

SPECIAL PRECAUTIONS

*** ALWAYS SEGREGATE MATERIALS BY MAJOR HAZARD CLASS ***

THIS PRODUCT CONTAINS A CHEMICAL KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER.

Storage Segregation Hazard Classes: IRRITANT

Special Handling/Storage: KEEP MATERIAL DRY.

Special Workplace Engineering Controls: ADEQUATE VENTILATION TO KEEP DUST LEVEL TO BELOW PEL/TLV/WEG (WORKPLACE

EXPOSURE GUIDELINE).

Other: ADDITIONAL INFORMATION ON THE HEALTH AND SAFETY ASPECTS OF REFRACTORY CERAMIC FIBERS IS AVAILABLE.

† Copyright© 1980, National Fire Protection Assoc., Quincy, MA 02269. This reprinted material is not the complete and official position of

the NFPA on the referenced subject, which is represented only by the standard in its entirety. MSSM/226-21:26/00030. As of the date of

preparation of this document, the foregoing information is believed to be accurate and is provided in good faith to comply with applicable

federal and state law(s). However, no warranty or representation with respect to such information is intended or given.

MSDS/MSD3 FORM REV. 7/2/91

MATERIAL SAFETY DATA SHEET
55

Ordering Procedures

Please refer to the Specification Plate for the complete model number, serial number, and

series number when requesting service, replacement parts or in any correspondence

concerning this unit.

All parts listed herein may be ordered from the Barnstead|Thermolyne dealer from whom

you purchased this unit or can be obtained promptly from the factory. When service or

replacement parts are needed we ask that you check first with your dealer. If the dealer

cannot handle your request, then contact our Customer Service Department at 319-556-

2241 or 800-553-0039.

Prior to returning any materials to Barnstead|Thermolyne Corp., please contact our

Customer Service Department for a “Return Goods Authorization” number (RGA). Material

returned without a RGA number will be refused.
56

Barnstead|Thermolyne Corporation warrants that if a product manufactured by Barnstead|Thermolyne and

sold by it within the continental United States or Canada proves to be defective in material or construction, it

will provide you, without charge, for a period of ninety (90) days, the labor, and a period of one (1) year, the

parts, necessary to remedy any such defect. Outside the continental United States and Canada, the warranty

provides, for one (1) year, the parts necessary to remedy any such defect. The warranty period shall

commence either six (6) months following the date the product is sold by Barnstead|Thermolyne or on the

date it is purchased by the original retail consumer, whichever date occurs first.

All warranty inspections and repairs must be performed by and parts obtained from an authorized

Barnstead|Thermolyne dealer or Barnstead|Thermolyne (at its own discretion). Heating elements, however,

because of their susceptibility to overheating and contamination, must be returned to our factory, and if, upon

inspection, it is concluded that failure is not due to excessive high temperature or contamination, warranty

replacement will be provided by Barnstead|Thermolyne. The name of the authorized Barnstead|Thermolyne

dealer nearest you may be obtained by calling 1-800-446-6060 (319-556-2241) or writing to:

Barnstead|Thermolyne

P.O. Box 797

2555 Kerper Boulevard

Dubuque, IA 52004-0797

USA

FAX: (319) 589-0516

E-MAIL ADDRESS: mkt@barnstead.com

Barnstead|Thermolyne’s sole obligation with respect to its product shall be to repair or (at its own discretion)

replace the product. Under no circumstances shall it be liable for incidental or consequential damage.

THE WARRANTY STATED HEREIN IS THE SOLE WARRANTY APPLICABLE TO Barnstead|Thermolyne

PRODUCTS. Barnstead|Thermolyne EXPRESSLY DISCLAIMS ANY AND ALL OTHER WARRANTIES,

EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR USE.

One Year Limited Warranty

9001

ISO

REGISTERED

Barnstead|Thermolyne

2555 Kerper Blvd.

P.O. Box 797

Dubuque, IA 52004-2241

Phone: 319-556-2241 800-553-0039

Fax: 319-589-0516

E-Mail Address: mkt@barnstead.com