Lab-Line 3608, 3608MP, 3608-1CE, 3608-6CE, 3618 Operation Manual

4/02

OPERATION

MANUAL

MANUAL 056-602-00

REV. F

LAB-LINE

VACUUM OVENS

MODEL NO.

3608

3608MP

3608-1CE
3608-5
3608-6CE
3618
3618-1CE
3618-5
3618-6CE

1999 North 15th Ave.

PHONE: [phone] or [phone]; FAX: [phone]

, Melrose Park, IL 60160-1491 USA

TABLE OF

CONTENTS

SECTION TITLE

2

1 Introduction

2 Description

3 Specifications

4 Installation

5 Features

6 Operation

7 Maintenance

8 Troubleshooting

9 Service Guides

10 Replacement Parts

Warranty

THANK YOU

SECTION 1

INTRODUCTION

3

for selecting Lab-Line Instruments for your equipment needs. For maximum value and
ease of start-up,

PLEASE PROCEED AS FOLLOWS:

• Inspect the carton and contents for shipping damage. Notify the carrier immediately

if damage is found.

• Use the Accessory Checklist when unpacking to verify that the complete unit has

been received. Do not discard packing materials until all is accounted for.

• Read this Operation Manual thoroughly before deciding upon an appropriate location

for the unit: you will want to consider the availability of power, water, hook-ups,
drains and other unit requirements, as well as user convenience.

• Insist that every operator of this unit becomes familiar with the Operation Section of

this manual.

• Be sure to fill out the Warranty Registration Card and mail it in to Lab-Line

Instruments within seven (7) days after receiving the unit.

IF

after reading this manual you should have any difficulties with the installation or
operation instructions, please call:

Lab-Line Customer Relations Department
Lab-Line Customer Relations Department

[phone] or [phone]

ALL RIGHT RESERVED

The information contained in this manual is the exclusive property of Lab-Line Instruments, Inc., and has been pro­vided solely to enable the users of the equipment described herein to operate and maintain such equipment. Any
other use of this information, or the reproduction or transmission of all or any portion of this manual without prior
written consent of the manufacturer is expressly prohibited. © 2002, Lab-Line Instruments, Inc.

SECTION 2

DESCRIPTION

4

Lab-Line's Vacuum Ovens are designed for drying media under carefully
controlled conditions—in a normal atmosphere, a vacuum of up to 30 inches Hg,
or an inert gas atmosphere.

The oven is primarily used for desiccating, vacuum embedding, plating
and electronic component processing. Non-corrosive, nonflammable gases such
as nitrogen and carbon dioxide can be used in the oven.

All controls and connections (except electrical power) are located on the
front vertical panel—these include lighted power switch, vacuum gauge,
temperature control, vacuum control valve and nickel-plated hose connectors.

Uniform radiant wall heat, with no internally exposed heaters, optimizes
chamber space. 3-inches (76 mm) of glass wool insulation throughout helps
maintain temperature uniformity effectiveness. Temperature is controlled either
by a hydraulic thermostat (most models) or microprocessor-based temperature
controller (model 3608MP only) and can be read on a dial thermometer, LCD or
LED display.

The chamber of the unit is not designed for exposure to concentrated
solvents, oils, concentrated acids or dilute sodium hydroxide.

Vacuum levels are precisely held between 0 and 30-inches of mercury.

The silicone door gasket assures a tight seal at all vacuum levels. A
high strength tempered glass window allows full view of oven contents. Two
aluminum shelves provide good heat conduction to samples. The shelf
assembly removes for easy cleaning.

IMPORTANT NOTE: WHEN OPERATING IN A VACUUM, THERE IS NO TRANSFER OF HEAT
FROM THE EVACUATED CHAMBER INTERIOR TO OBJECTS WITHIN THE CHAMBER
UNLESS THEY ARE RESTING DIRECTLY UPON ONE OF THE SHELVES—DO NOT PUT
INSULATING MATERIAL BETWEEN A SHELF AND A VESSEL BEING HEATED. ALSO,
BE SURE THAT A THERMOMETER’S SENSOR ELEMENT IS IN DIRECT CONTACT

WITH THE SURFACE OF THE CENTER SHELF WHEN TAKING A READING.

MODEL DESIGNATIONS AND THEIR FEATURES:

3608, 3608-1CE, 3618 and 3618-1CE: Models with dial thermometer.

3608-5, 3608-6CE, 3618-5 and 3618-6CE: Models with LED temperature display.

3608MP: Model with microprocessor temperature controller.

POWER REQUIREMENTS:

3608, 3608MP, 3608-5: 120 VAC, 50/60 Hz, 5.0 Amps, 600 Watts

3608-1CE, 3608-6CE: 240 VAC, 50/60 Hz, 2.5 Amps, 600 Watts

3618, 3618-5: 120 VAC, 50/60 Hz, 13.3 Amps, 1600 Watts

3618-1CE, 3618-6CE: 240 VAC, 50/60 HZ, 6.7 Amps, 1600 Watts

TEMPERATURE RANGE: All Models:

SECTION 3

SPECIFICATIONS

5

From slightly above ambient to 220ºC

THERMOMETER TYPE:

3608, 3608-1, 3618, 3618-1: Bimetallic, dial type; range from

0ºC to 300ºC in 5ºC increments

3608-5, 3608-6, 3618-5, 3618-6: LED Display; range from 0ºC to 300ºC

in 1ºC increments

CHAMBER DIMENSIONS:

3608, 3608MP, 3608-1CE, 3608-5, 3608-6CE: 10"W x 12"D x 10"H (25 x 30 x 25 cm)

3618, 3618-1CE, 3618-5, 3618-6CE: 14"W x 20"D x 14"H (36 x 51 x 36 cm)

OVERALL DIMENSIONS:

3608, 3608MP, 3608-1CE, 3608-5, 3608-6CE: 19-7/8"W x 16"D x 16¼"H (50 x 40 x 41 cm)

3618, 3618-1CE, 3618-5, 3618-6CE: 25"W x 25"D x 22"H (64 x 64 x 56 cm)

VOLUME:

3608, 3608MP, 3608-1, 3608-5, 3608-6CE: 0.7 cubic feet (19.8 liters)

3618, 3618-1CE, 3618-5, 3618-6CE: 2.3 cubic feet (65.1 liters)

NET WEIGHT:

3608, 3608MP, 3608-1CE, 3608-5, 3608-6CE: 83 lbs. (38 kg)

3618, 3618-1CE, 3618-5, 3618-6CE: 150 lbs. (68 kg)

UNIT’S ENVIRONMENTAL OPERATING CONDITIONS:

POLLUTION DEGREE: 2

INSTALLATION CATEGORY: II

ALTITUDE: 2000 Meters MSL (Mean Sea Level)
HUMIDITY: 80% maximum, non-condensing

ELECTRICAL SUPPLY: 120VAC or 240VAC

VOLTAGE TOLERANCE: ±10% of normal rated line

TEMPERATURE: 15ºC to 40ºC

PRODUCT USAGE: This product is intended for use indoors only

√SHIPPING CARTON:

This should be inspected upon delivery. When received, carefully
examine for any shipping damage before unpacking. If damage is discovered,
the delivering carrier should both specify and sign for the damage on your copy
of the delivery receipt.

Open the carton carefully making certain that all parts are accounted for
before packaging materials are discarded—after unpacking, if damage is found,
promptly report it to the carrier and request a damage inspection promptly.

SECTION 4

INSTALLATION

6

IMPORTANT: Failure to request an inspection of damage within a few
days after receipt of shipment absolves the carrier from any liability for damage:
you must call for a damage inspection promptly.

LOCATION:

Place the unit where it will be operated, away from drafts and wide
variations in ambient temperature. It should be near a power source that
matches the unit nameplate requirements. Allow clearance around the unit for
free air convection, hose/accessory attachment and user-access. DO NOT put
the oven on top of or underneath another oven, or on a combustible surface.

HOSE CONNECTIONS:

Connect a ¼-inch ID vacuum hose to the left hose connector on the
control panel that is marked "EVACUATE". Connect the other end of the hose
to a vacuum pump.

If operation will include replacing the vacuum in the chamber with an inert
gas such as carbon dioxide or nitrogen, connect a ¼-inch ID flexible hose to the
right hose connector that is marked "VENT" and to the regulator for the gas
supply. DO NOT use combustible, flammable or corrosive gases.

ELECTRICAL CONNECTION:

The unit is supplied with a 3-wire line cord. It should be plugged into an
outlet supplying the correct voltage for the unit and designed for 3-prong plugs.

For an outlet designed to accept 2-prong (ungrounded) plugs, the best

recommendation is to have a qualified electrician replace it with a new grounded

outlet.

If a plug must be installed, use only the 3-prong grounded type, rated for
the unit load requirements and matching the power outlet. Make sure the green
ground wire is secured to the plug ground post—refer to the upcoming wiring
schematics if necessary.

Turn the power switch OFF and insert the plug into the outlet.

FOR SERIES 3618 UNITS ONLY: Turn the power switch to the OFF position.
For the 120V unit, plug the power cord into a grounded 20-amp outlet; for the
240V unit, attach proper power plug to match the power outlet.

INSTALLATION: (Con’t)

THERMOMETER:

For models using the dial thermometer—3608, 3608-1CE, 3618 and
3618-1CE—place the thermometer so that the sensing element is in direct
contact with the top shelf. The dial should be easily visible through the glass
door.

Models with the LED display of temperature—3608-5, 3608-6CE, 3618-5
and 3618-6CE—are easily identifiable with the LED positioned just below

the power switch.

Model 3608MP features a microprocessor based temperature controller
with an incorporated display.

7

CONTROL PANEL:

1

2

CHAMBER VACUUM

3

SECTION 5

FEATURES

POWER

TEMPERATURE

CLOSED

8

4

EVAC VENT

EVACUATE VENT

5

MODELS WITH DIAL THERMOMETER:

1. POWER SWITCH: Power is on to the unit when this switch lamp is lit.

(To reset the circuit breaker, press this switch to off, then on.)

#440-359-00 (120V), #440-292-00 (240V)*

2. CONTROL THERMOSTAT & STATUS LAMP: Adjust manually to control

oven temperature. A permanently-set bimetallic thermostat (not on the

panel) limits oven temperature at 250ºC should the control thermostat
fail.)

#920-283-00 (BIMETALLIC THERMOSTAT), #560-223-00 (KNOB) ; #360-235-00 (LAMP LENS)*

3. VACUUM GAUGE: Displays chamber level to 30-inches of mercury.

#660-103-00 (3608,-1, 3618, -1) *

4. VACUUM/VENT VALVE: 3-way valve draws, holds or releases a vacuum.

#950-125-00*

5. HOSE CONNECTORS: Marked "EVACUATE" and "VENT" for ¼" flexible

tubing to connect to a gas source or vacuum pump.

*AS LISTED ON UPCOMING REPLACEMENT PARTS LIST

FEATURES: (Con’t)

CONTROL PANEL:

1

2

3

POWER

TEMPERATURE ºC

TEMPERATURE

CHAMBER VACUUM

4

5

EVAC VENT

CLOSED

9

EVACUATE VENT

6

MODELS WITH LED READOUT:

1. POWER SWITCH: Power is on to the unit when this switch lamp is lit.

(To reset the circuit breaker, press this switch to off, then on.)

#440-359-00 (120V), #440-292-00 (240V)*

2. LED TEMPERATURE DISPLAY: Readout of temperature.

3. CONTROL THERMOSTAT & STATUS LAMP. Adjust manually to control

oven temperature. A permanently-set bimetallic thermostat (not on the

panel) limits oven temperature at 250ºC should the control thermostat
fail.)

#920-283-00 (BIMETALLIC THERMOSTAT), #560-223-00 (KNOB) ; #360-235-00 (LAMP LENS)*

4. VACUUM GAUGE: Displays chamber level to 30-inches of mercury.

#660-097-00 (3608-5,-6) OR $660-097-00 (3618-5, -6)*

5. VACUUM/VENT VALVE: 3-way valve draws, holds or releases a vacuum.

#950-125-00*

6. HOSE CONNECTORS: Marked "EVACUATE" and "VENT" for ¼" flexible

tubing to connect to a gas source or vacuum pump.

*AS LISTED ON UPCOMING REPLACEMENT PARTS LIST

FEATURES: (Con’t)

CONTROL PANEL:

1

2

POWER

TEMPERATURE

CHAMBER VACUUM

3

4

EVAC VENT

CLOSED

10

EVACUATE VENT

5

MODEL WITH MICROPROCESSOR CONTROLLER:

1. POWER SWITCH: Power is on to the unit when this switch lamp is lit.

(To reset the circuit breaker, press this switch to off, then on.)

#440-359-00 (120V), #440-292-00 (240V)*

2. TEMPERATURE CONTROLLER: PID based microprocessor controller

maintains chamber temperature.

#485-360-15

3. VACUUM GAUGE: Displays chamber level to 30-inches of mercury.

#660-103-00

4. VACUUM/VENT VALVE: 3-way valve draws, holds or releases a vacuum.

#950-125-00*

5. HOSE CONNECTORS: Marked "EVACUATE" and "VENT" for ¼" flexible

tubing to connect to a gas source or vacuum pump.

*AS LISTED ON UPCOMING REPLACEMENT PARTS LIST

DANGER: DO NOT USE IN THE PRESENCE OF FLAMMABLE OR
COMBUSTIBLE MATERIALS OR EXPLOSIVE GASES. DO NOT USE IN THE
PRESENCE OF PRESSURIZED OR SEALED CONTAINERS—FIRE OR
EXPLOSION MAY RESULT, CAUSING DEATH OR SEVERE INJURY.

SECTION 6

OPERATION

WARNING: DO NOT HEAT ANY SUBSTANCE ABOVE A TEMPERATURE
WHICH WILL CAUSE IT TO EMIT TOXIC FUMES—DEATH OR SEVERE
INJURY MAY RESULT.

TEMPERATURE CONTROL:

If it is necessary to set temperature before loading oven, push the power
switch ON and note that the power switch light is lit. Rotate the thermostat knob
to approximate the desired setting. The heater status lamp will be steadily lit until
the chamber temperature approaches the thermostat setting. Wait several heat
cycles until the temperature has stabilized.

Check the thermometer—dial or LED display—and rotate the thermostat
knob clockwise to raise the set point or counterclockwise to lower it. After oven
temperature has stabilized, check the temperature again and make further
thermostat adjustments until the thermometer consistently shows the

11

desired operating temperature. Push the power-switch OFF and allow the oven
to cool down, or, if a batch is ready, the oven can be loaded immediately.

LOADING THE OVEN:

For units which utilize a dial thermometer, the thermometer can be
removed and put back after loading if that is more convenient. Note that the
thermometer sensing element must be in direct contact with a shelf for an
accurate reading.

For best results, distribute the load evenly in the chamber, at least 1-inch
away from chamber walls and resting directly on the shelves. DO NOT PLACE
FLAMMABLE SOLVENTS OR VAPORS in the oven and avoid spilling acids. Be
careful not to heat substances above their auto-ignition temperatures.

While the oven door is open, apply high quality vacuum grease to the
door gasket. Close the door and push the power switch ON. If oven temperature
was not previously set, review above at “TEMPERATURE CONTROL” to set the
desired operating temperature.

MAINTAINING PROPER VACUUM LEVEL:

The vacuum level will decrease slightly over a period of time. To bring it
back up, rotate the vacuum/vent valve to "EVACUATE" and start the vacuum
pump.

When the vacuum gauge again shows the desired level, rotate the
vacuum/vent valve to the setting marked "CLOSED" and shut off the vacuum
pump.

OPERATION: (Con’t)

RELEASING THE VACUUM:

If the vacuum is to be replaced by ambient air, disconnect any tubing
attached to the hose connector marked "VENT" and rotate the vacuum/vent
valve to its "VENT” setting.

PURGING THE CHAMBER WITH INERT GAS:

Use only a non-combustible, nonflammable, non-corrosive gas—such as
nitrogen or carbon dioxide—if application requires replacing the vacuum with an
inert gas.

Connect ¼-inch ID tubing to the hose connector marked "VENT” and

connect the other end of the tubing to the regulator at the inert gas source.

Start the gas flowing at no more than 5 psi. Rotate the vacuum/vent

valve to the "VENT" position and shut off the regulator when the vacuum gauge

reads zero (normal atmospheric pressure).

WARNING: DO NOT PRESSURIZE THE CHAMBER ABOVE ATMOSPHERIC
PRESSURE—THE OVEN WILL NOT WITHSTAND A POSITIVE INTERNAL
PRESSURE. WHEN THE VACUUM GAUGE READS ZERO, SHUT THE GAS
OFF.

The oven does not require very much gas to fill the chamber:

3608, 3608MP, 3608-1, 3608-5, 3608-6: Interior volume is 0.75 cubic feet
3618, 3618-1, 3618-5, 3618-6: Interior volume is 2.30 cubic feet

12

UNLOADING THE OVEN:

When the bake is completed and the vacuum has been released or
replaced as described above and on the previous page, push the power switch
to OFF. Open the oven door and remove the dial thermometer. Take the
contents from the chamber and re-insert the thermometer with the sensing
element in direct contact with the center shelf.

OPERATION: (Con’t)

MICROPROCESSOR-BASED TEMPERATURE CONTROLLER, MODEL 3608MP
ONLY:

HEAT INDICATOR CHAMBER OR SET POINT TEMPERATURE

220.0

4 WV

1. CONTROLLER SELF-TEST: When the oven is powered up the

controller will display 8888 along with
the three decimal points and the heat ON
indicator lamp. The display will then blank
out for 2 seconds before showing the
chamber temperature.

2. HEAT ON INDICATOR: The heat ON indicator lamp is lit when the

chamber heater is receiving power. The
lamp will normally flash when the chamber
temperature is at set point.

13

3. SET POINT ADJUSTMENTS: The temperature controller normally displays

PRESS CONTROLLER

4 View set point

4 W Decrease set point

4 V Increase set point

A. Press and hold the star key and use either the up or down arrow

key to adjust the set point to the desired temperature. Release the
star key.

B. Allow at least 30 minutes for the chamber temperature to stabilize.

OPERATION: (Con’t)

the chamber temperature. To view or change
the temperature set point proceed as follows:

TEMPERATURE CONTROLLER: (Con’t)

AUTO TUNE:

The auto tune program automatically adjusts the controller parameters to
achieve optimal temperature control.

It is not necessary to run the auto tune program when setting up the oven.
However, if the temperature appears to be unstable, the auto tune program can
be run using the procedure shown below:

FOR BEST RESULTS:

• Set the usual set point temperature and use normal load conditions.

• Allow the oven to stabilize at set point for at least 30 minutes.

AUTO TUNING PROCEDURE:

A. Enter the program mode by pressing and holding BOTH the up and down

arrow keys for 3 seconds.

B. Release BOTH arrow keys when tunE is displayed.

C. The controller display should now be alternating between tunE and

oFF.

D. Press and hold the “STAR” (4) key. Press and release the up arrow key

until At.SP is displayed. Release the “STAR” (4) key.

14

E. After one minute has elapsed, the controller display will begin to alternate

between showing the chamber temperature, tunE and At.SP.

F. Allow the program to run until the display again shows only the chamber

temperature.

OPERATION: (Con’t)

TEMPERATURE CONTROLLER: (Con’t)

TEMPERATURE CALIBRATION:

A. Place a calibrated thermometer near the approximate geometric center of

the chamber in a position that would allow it to be read through the glass

door.

B. Press and hold the “STAR” (4) key and using the up or down arrow key,

adjust the set point to the desired temperature.

C. Allow the unit to run for at least 30 minutes.

D. The controller display should now be indicating the set point temperature.

Make note of the thermometer reading without opening the glass door.

E. Press and hold both arrow keys until the controller display indicates

tunE. Release the arrow keys. Press and release the down arrow key,

the display should now indicate LEUL. Press and hold the “STAR” (4)

key and using the up arrow key adjust the display to read 3. Release the

“STAR” (4) key. Press and release the up arrow key until the display

indicates Zero. The display should now alternate between Zero and a

numerical value.

F. Using the examples shown below and the thermocouple value obtained in
step above, enter the correct Zero value into the controller by pressing the
“STAR” (4) key and using the up or down arrow keys. If there is already
a Zero value present then add the new value to the one already present.

Thermometer = 200 °C Thermometer = 200 °C

Controller Reading = 205 °C Controller Reading = 205 °C

Subtract = -5 °C Subtract = +5 °C

Enter Zero value of -5 °C Enter Zero value of +5 °C

15

G. When the correct Zero value has been entered, press and hold the two

arrow keys together until the display again indicates the chamber

temperature. If the procedure was done correctly, the controller display

should now agree with the thermometer reading to within ±0.5ºC.

H. Allow the unit to run for at least 30 minutes.

I. Re-check the thermometer reading, the controller display and the

thermometer should agree to within ±0.5ºC. If not repeat steps D, E and F

above.

BE ADVISED:

SECTION 7

MAINTENANCE

NOTE: MAKE NO ATTEMPT TO SERVICE OR REPAIR A LAB-LINE PRODUCT UNDER
WARRANTY BEFORE CONSULTING YOUR LAB-LINE DEALER. AFTER THE WARRANTY
PERIOD, SUCH CONSULTATION IS STILL ADVISED, ESPECIALLY WHEN THE REPAIR
MAY BE TECHNICALLY SOPHISTICATED OR DIFFICULT.

IF ASSISTANCE IS NEEDED BEYOND WHAT THE DISTRIBUTOR CAN PROVIDE, PLEASE
CALL THE LAB-LINE CUSTOMER RELATIONS DEPARTMENT AT [phone] OR
[phone]. NO MERCHANDISE, HOWEVER, SHOULD BE RETURNED DIRECTLY TO
LAB-LINE WITHOUT PRIOR APPROVAL FROM LAB-LINE.

CAUTION: DISCONNECT PLUG FROM ELECTRICAL OUTLET BEFORE
ATTEMPTING ANY MAINTENANCE OR REPAIR OF THIS UNIT.

ROUTINE CLEANING:

Wash the cabinet with a solution of water and mild soap or detergent to
clean off surface dirt, marks or smudges.

Keep the vents clear of dust for free air circulation. This will add to the
service life of components.

The aluminum shelf assembly should be washed with a mild soap and

water. Do not use abrasive or halogen-based cleaners—they will damage the

finish. Rinse thoroughly and dry completely.

Wipe interior glass with an ammonia-based glass cleaner and a soft,

lint-free cloth.

Clean up spills inside the chamber as soon as possible to prevent them
from being baked on. When the oven is cool, use hot soapy water and a soft
cloth to clean the #304 stainless steel chamber. Do not use scouring pads with
metallic content, chlorine bleach or halogen-based cleaners. (Special order units
may come with stainless steel shelves, in addition to the stainless steel interior.)

16

CARE AND CLEANING OF STAINLESS STEEL:

CAUTION: DISCONNECT UNIT FROM POWER SOURCE PRIOR TO
CLEANING. WE RECOMMEND ALL SERVICE BE PERFORMED BY
QUALIFIED SERVICE PERSONNEL.

WARNING: ELECTROLYSIS CAN DAMAGE STAINLESS STEEL. THIS
OCCURS WHEN AN OBJECT IS ALLOWED TO REST DIRECTLY ON THE
SURFACE OF STAINLESS STEEL, TRAPPING MOISTURE THAT BECOMES
OXYGEN-STARVED, BUT IS SURROUNDED BY WATER-CONTAINING
OXYGEN.

17

MAINTENANCE: (Con’t)

THE ALLOY CALLED STAINLESS:

Stainless steel is an alloy of steel with chromium and nickel which
increase the metal’s resistance to rust and corrosion. Yet, if not properly cared
for, stainless steel can rust and corrode.

Exposure to air provides the passivation, or oxide layer coating, for clean
stainless by producing a thin, durable chromium-oxide film that forms rapidly
on the alloy surface to give stainless its characteristic “stainless” quality. Also
exposure of the surface to other oxidizing environments can produce a
passivating film or coating.

However, if free oxygen is not available due to scale or contamination
buildup the metal surface may become vulnerable to rusting and corrosion as
well as pitting. But by maintaining neutral pH and conducting frequent cleanings
with detergent and water, years of trouble-free service from stainless steel
products can be obtained.

SOME STAINLESS GUIDELINES TO CONSIDER:

Distilled water is recommended. Please note: if this water is very pure it
may be corrosive to stainless. When filling a bath or incubator, ALWAYS ADD 2
to 40 PPM (20 TO 40 MG/LITER) DISODIUM PHOSPHATE OR SODIUM
BICARBONATE, ADJUSTING DOSAGE TO PROVIDE A pH VALUE OF 7 TO 9.

If not available, use clean, aerated soft tap water provided the total solids
concentration is < 500 PPM.

WE DO NOT RECOMMEND USING 18 MEG OHM DEIONIZED WATER.

If this is the only source of treated water available—mix with regular tap water
at a 50/50 ratio.

THE pH FACTOR:

Check pH regularly. If pH is <6.0, add disodium phosphate to increase pH
to a 7 to 9 value. Sodium carbonate or sodium bicarbonate may be used but
they tend to form scale which must be rinsed out regularly. If pH is >10.0, add
sodium bisulfate to decrease pH to a 7 to 9 value. Avoid adding harsh alkalines
or acids since these may cause localized corrosion and result in unstable pH.

SPECIAL CONSIDERATIONS:

WARNING: IF IT IS NECESSARY TO USE THE FOLLOWING CHEMICALS,
LIMIT EXPOSURE TIME TO A MAXIMUM OF 3 HOURS—ALWAYS CLEAN
SURFACES IMMEDIATELY AFTER USE.

Chemicals which should be limited to a 3 hour maximum exposure time to
stainless steel are:

Aluminum chloride E.D.T.A. Potassium permanganate
Barium chloride Ferrous chloride Potassium thiocyanate
Calcium chloride Lysol Sodium hypochlorite
Chlorinated Lime Mercury salts Stannous chloride
Citric acid (boiling) Phenol Tartaric acid
Dakin’s solution

18

MAINTENANCE: (Con’t)

BE ADVISED: NEVER USE THE FOLLOWING ON STAINLESS STEEL:

Aqua regia
Ferric chloride
Iodine
Sodium acid
Sodium azide

Chemical spills, especially those agents listed here, should be removed
as soon as possible and the stainless steel surface cleaned with mild soapy
water followed by a clean water rinse.

CLEANSING AGENTS:

Anti-fungal and anti-bacterial additives are permissible to use as long as
the pH of the aqueous solution is kept within the range of 7 to 9. These are
available through laboratory distributors—but be sure to CONFIRM that they are
not harmful to stainless steel.

CLEANING METHODS:

Do not use any metallic pads. Instead, for stubborn stains, use a plastic
light-duty cleansing pad and rub GENTLY in the direction of the metal grain.

If stains continue to persist, use one of the following chemicals and methods.

CAUTION: EXTREME CARE MUST BE TAKEN WHEN HANDLING THESE
MATERIALS. ALWAYS WORK IN AN AREA WITH ADEQUATE
VENTILATION. USE THE PRECAUTIONS AS OUTLINED IN THE MATERIAL
SAFETY DATA SHEET (MSDS) AND THE MANUFACTURER’S
INSTRUCTIONS FOR THE PRODUCT BEING UTILIZED. ALSO, FOLLOW THE
PERSONAL PROTECTION INDEX FOUND IN THE HAZARDOUS MATERIALS
INFORMATION SYSTEM (HMIS) SECTION OF THE MSDS.

NOTE: THE USE AND DISPOSAL OF THESE CHEMICALS MAY BE REGULATED BY YOUR
LOCAL CITY CODES; CONSULT THOSE REGULATIONS BEFORE OF DISPOSING OF

THESE MATERIALS.

• Any of a variety of “scale removers” available at local supermarkets or

hardware stores used for the cleaning of coffee marks, humidifiers or

vaporizers.

• A 15% to 35% phosphoric acid solution available from laboratory supply

distributors for scale and rust removal. Allow solution to soak the surface

affected until rust and scale is loosened. Immediately follow with a clean

water rise.

• Citric acid based cleaners.

• Bathroom tub and tile cleaners.

19

MAINTENANCE: (Con’t)

CLEANING METHODS: (Con’t)

• A mixture of 20% nitric acid and 1.5% hydrofluoric acid (or hyrochloric

acid). Swab solution on surface allowing it to remain until rust is loosened.

Immediately follow with a clean water rise. (This method should ONLY be

used if SEVERE rust and scale stains are present.)

• Oxalic acid 2% to 5% in warm water. Swab solution on surface allowing it

to remain until rust is loosened. Immediately follow with a clean water rise.

(This method should ONLY be used if SEVERE rust and scale stains are

present.)

Regardless of the approach utilized, ALWAYS follow the manufacturer’s
directions and allow the chemicals to do the cleaning with MINIMAL scrubbing.

Always follow cleanings with a clean water rinse. Air dry.

MATERIALS EFFECTIVE IN DISINFECTING:

• Glutaraldehyde

• Alcohol

BE ADVISED: THIS INFORMATION IS INTENDED AS GUIDELINES ONLY
AND LAB-LINE INSTRUMENTS, INC. MAKES NO CLAIM AS TO THE
SUITABILITY TO ANY PARTICULAR SITUATION. CONSULT YOUR STAFF
CHEMIST TO DETERMINE WHAT WOULD BE BEST FOR YOUR STAINLESS
STEEL PRODUCT AND LABORATORY.

DOOR GASKET LUBRICATION:

Apply a high-quality vacuum grease to the door gasket frequently,
especially before initiating a vacuum. Also apply vacuum grease to the gasket
after shutdown, if the oven will not be used in the near future.

20

SECTION 8

TROUBLESHOOTING

There are few oven parts that will require repair. In case of a malfunction,

the control thermostat, limit thermostat, heater status lamp, heaters, power
switch, vacuum/vent valve and vacuum gauge are fairly easy to replace.

Use this troubleshooting guide to find a possible source of any problem,
then test and/or make replacement as described.

NOTE: BEFORE ATTEMPTING ANY REPAIR, DISCONNECT POWER CORD FROM

OUTLET.

SYMPTOM POSSIBLE CAUSES OF PROBLEM

Excessive vacuum Check door gasket and door alignment.

leaks:

Check for loose connections/fittings.*

Check the vacuum/vent valve—order a replacement if it is
leaking.*

Won't vent or Check for open fittings, large leaks.*

evacuate:

Check vacuum/vent valve; replace if bad.*

Check tubing & fittings for obstruction.*

Apply high quality vacuum grease to door gasket.

Vacuum gauge not at Replace the vacuum gauge.*
zero when oven door

is open:

Power switch does Check power cord and outlet for power.

not light:

Re-set the circuit breaker by pushing the power switch on
and off.

Replace the power switch if necessary.

*NOTE: ALL PIPE THREADS ARE WRAPPED WITH THREAD SEALING TAPE FOR A LEAKPROOF
FIT—USE NEW TAPE IF ANY CONNECTION IS OPENED.

21

TROUBLESHOOTING: (Con’t)

SYMPTOM POSSIBLE CAUSES OF PROBLEM

Heater status lamp is Replace the heater status lamp.

out when cold oven is

heating up:

The thermostat is set Move thermometer in contact with shelf.

at maximum and
thermometer does Check both thermostats—replace if bad.

not register or only

registers partial Make ohmmeter check of heater resistance and replace

heating: faulty heater(s).

SECTION 9

SERVICE GUIDES

22

CAUTION: PUSH THE POWER SWITCH OFF AND UNPLUG THE OVEN BEFORE
ATTEMPTING ANY SERVICE OR REPAIRS ON THE UNIT.

CONTROL PANEL REMOVAL & INSTALLATION:

• Tilt the oven back to remove screws under the control panel. Carefully pull

the bottom forward until the top is free. Pull it 3-inches (at most) from the

oven to reach behind and remove internal copper tubing from the vacuum

gauge.

• To replace the panel, first attach copper tubing securely to the vacuum

gauge, then guide the panel top edge onto mounting studs. Fasten the

bottom edge screws and power up to test components.

POWER SWITCH REPLACEMENT:

Disconnect power, remove the control panel, then locate the power switch
and associated wiring.

• Compress 4 tabs to push the switch out the front of the panel.

• Remove the leads from the old switch one at a time and attach them to the

new switch—refer to the wiring schematic if needed.

• Push the new switch into place on the control panel and replace the control

panel on the oven body.

CONTROL THERMOSTAT REPLACEMENT:

Disconnect power and remove the control panel, back panel (edge
screws) and insulation.

• Locate the thermostat bulb from the back of the oven attached to the right-

side heater on the vacuum chamber. Slide the bulb from its bracket.

• Remove the thermostat knob by loosening the setscrew and take the old

thermostat from the control panel. Move the 3 leads to new thermostat,

referring to the wiring schematic if necessary.

• Install the new thermostat on the control panel and tighten the knob onto

it. Uncurl enough sensor tubing to slide the new bulb into its bracket with

several inches of slack. Route the sensor tubing to prevent electrical

shorts to other components.

• Replace the insulation and the back panel. Replace the control panel,

power up and test run the oven.

SERVICE GUIDES: (Con’t)

HEATER STATUS LAMP REPLACEMENT:

Disconnect power and remove the control panel—refer to the upcoming
wiring schematic before continuing.

23

• Remove the status lamp lead at the thermostat and cut the other lead

close to the heater status lamp.

• Pry the retaining clip from the old lamp and pull it from the control panel.

Push the new lamp in place and install the same retaining clip on it. Attach

the new lamp leads to the thermostat and to the cut wire, referring to the

wiring schematic.

• Replace the control panel, power up and test the new status lamp.

SERVICE GUIDES: (Con’t)

VACUUM/VENT VALVE REPLACEMENT:

Disconnect power and remove the control panel. Referring to the
upcoming piping diagram below, loosen the copper tubing from 3 compression
fittings on the vacuum/vent valve on the control panel. Then remove the 2
elbows and the straight connector from the valve body.

24

• Remove the control panel valve knob by loosening the hex setcrew. Then

unscrew the valve retaining nut on front of the panel and take the old valve

from the back of the panel.

• Install the new valve in the panel and tighten the retaining nut. Replace

the valve knob and tighten the setscrew.

• Clean the old thread tape from elbow and connector threads. Wrap these

threads with new thread tape, then install the elbows and connector on the

new valve body. Connect this assembly to the vacuum gauge with the

copper tubing and compression fittings.

• Replace the control panel, draw a vacuum and check for leaks.

COMPONENTS ON CONTROL PANEL

FEMALE RUN-TEE

VACUUM GAUGE

1/4” NPT S.S. MALE ELBOW TO

1/4” NPT MALE CONNECTOR

3-WAY HAND VALVE

1/4” NPT BRASS MALE ELBOW

1/4” NPT FEMALE CONNECTOR

1/4” HOSE BARB

NOTE: ALL TUBING TO BE 1/4” COPPER
(PART NO. 730-034-00); ALL THREADED
CONNECTION TO BE SEALED WITH
THREAD TAPE (PART. NO. 120-041-00).

VACUUM
CHAMBER
REAR
WALL

SERVICE GUIDES: (Con’t)

VACUUM GAUGE REPLACEMENT:

After disconnecting power and removing the control panel, remove copper
tubing from both compression fittings on the vacuum gauge—refer to the piping
diagram on previous page if necessary.

25

• Remove the T-fitting from the back of the gauge and take off the gauge

retaining bracket by removing the two thumbnuts. Pull the old gauge out

from the front of the control panel.

• Install the new gauge in the panel and replace the retaining bracket with

thumbnuts.

• Clean old thread tape from all male threads and wrap them with new tape.

Install the T-fitting on the back of the new gauge and attach copper tubing

with compression fittings to the gauge.

• Replace the control panel, draw a vacuum and check for leaks.

BACK PANEL COMPONENTS:

HI-LIMIT THERMOSTAT REPLACEMENT: Disconnect power and remove the
back panel (edge screws) and insulation from around components. Locate

the bimetallic limit thermostat on the back of the oven chamber.

• Remove the nut holding the thermostat in place. Disconnect the 2 leads

from it and attach them to the new thermostat.

• Secure the new thermostat onto the back of the oven chamber. Replace

insulation and the back panel, then power up and test run the oven.

HEATER REPLACEMENT: Disconnect power and remove the back panel

(edge screws) and insulation from the back and sides. Note that oven Models

3608 and 3608-1 have 2 heaters, one located on each side of the chamber;
Models 3618 and 3618-1 have 4 heaters, 2 located on each side.

• For Models 3618 and 3618-1, the control panel and the oven housing

must also be removed. The oven housing is held by screws around the

bottom edges. Lift it off and remove the rest of the insulation.

• For all models, unscrew the ¼-inch heater brace bolts to remove heater

braces. Pull the leads from heater terminals and test each heater for

shorts or low resistance at the heating element sheath. An ohmmeter

resistance reading that differs greatly from 48 ohms for Models 3608,

3608-1, or 36 ohms for Model 3618, indicates a faulty heater.

SERVICE GUIDES: (Con’t)

HEATER REPLACEMENT: (Con’t)

• Install a new or original heater with terminals facing down, using a new

heater brace if a new heater is installed. Attach leads to the heater, so that

wires do not touch any heated surfaces (see the upcoming wiring

schematic). Tighten mounting bolts securely.

26

• Replace the oven housing and control panel and repack side as well as

back insulation, and replace the back panel.

DOOR AND GASKET REPAIRS:

DOOR GASKET REPLACEMENT: After pulling the old gasket from its groove,
remove all dirt and foreign matter from the groove and from the mating surface
on the oven.

NOTE: DO NOT LET PETROLEUM, SILICONE OIL OR GREASE CONTACT THE GASKET
OR MOUNTING GROOVE.

• Press the new gasket onto the mounting surface in the middle of the top

section. Press top corners into place, then the sides. Next, fit the bottom

corners, then the bottom section into place. Press and spread the gasket

to set it solidly in the door groove.

• Close the door to help seat the gasket. Open the door and apply a high-

quality vacuum grease to the gasket. Evacuate the oven while pressing on

the door to seat the gasket firmly.

DOOR ALIGNMENT: Inspect the door-to-gasket seal to find where the door is
out of alignment. Note that there are 2 (inner and outer) sets of hinge bolts.

• Adjust vertical door position by loosening inner hinge-to-oven bolts.

Tighten them securely when the door is straight.

• Adjust gasket compression tolerance (in/out movement) by the outer

hinge-to-door bolts, then tighten them securely.

• After adjustment is made, check it by opening and closing the door several

times. Re-grease the gasket and test the seal by evacuating the oven.

(Make further adjustments if necessary.)

27

SECTION 10

REPLACEMENT PARTS

3608,-1,-5,-6 3618,-1,-5,-6

DESCRIPTION MODELS MODELS

Circuit Breaker 330-119-00 330-128-00 (3618,-5,-6)
Circuit Breaker 330-118-00 (3618-1)

Cordset 470-105-00 470-122-00

Door Gasket 530-158-00 530-159-00

Glass Door 540-181-00 540-182-01

Heater 340-331-00 340-171-00

Heater Braces 014-247-00 583-657-00

Rubber Feet 790-225-00 790-078-00

Shelf 810-439-00 810-440-00

Status Lamp Base 360-233-01 360-233-01

Status Lamp Lens
Switch, Power (120V)
Switch, Power (240V)

1
2

3

360-235-00 360-235-00
440-359-00 (3608,-5) 440-359-00 (3618,-5)
440-292-00 (3608-1,-6) 440-292-00 (3618-1,-6)

Thermometer, Dial 910-017-00 (3608,-1) 910-017-00 (3618,-1)

Thermometer, LED 910-126-00 (3608-5,-6) 910-126-00 (3618-5,-6)

Thermostat, Bimetallic

4

920-283-00 920-283-00

Thermostat, Hydraulic 920-223-00 920-223-00

Thermostat, Knob 560-223-00 560-223-00

Transformer 460-266-00 (3608-5,-6) 460-266-00 (3618-1,-6)
Vacuum Gauge
Vacuum Gauge

Vacuum/Vent Valve

5
6
7

660-103-00 (3608,-1) 660-103-00 (3618,-1)
660-097-00 (3608-5,-6) 660-097-00 (3618-5,-6)
950-125-00 950-125-00

S. S. Vacuum Gauge 660-103-01 (3608X)

Wiring Schematics 227-659-00 (3608) 227-667-00 (3618)
227-663-00 (3608-1) 227-668-00 (3618-1)
228-693-00 (3608-1CE) 228-710-00 (3618-1CE)

228-239-00 (3608-5) 228-429-00 (3618-5)

228-276-00 (3608-6) 228-609-00 (3618-6)

228-703-00 (3608-6CE) 228-694-00 (3618-6CE)

Model 3608MP:
Programmed Temperature Controller: 485-360-15
Wiring Schematic: 229-150-00

NEED A PART? CALL THE LAB-LINE PARTS HOTLINE.
CALL: [phone] or [phone]; FAX: [phone].

LAB-LINE RESERVES THE RIGHT TO CHANGE SPECIFICATIONS WITHOUT PRIOR NOTICE.

1

AS ILLUSTRATED

2

AS ILLUSTRATED

3

AS ILLUSTRATED

4

AS ILLUSTRATED

5

AS ILLUSTRATED

6

AS ILLUSTRATED

7

AS ILLUSTRATED

28

WARRANTY

Page 1 of 2

LAB-LINE INSTRUMENTS, INC. (“Lab-Line”) warrants that the product manufactured by
Lab-Line shall be free of defects in materials and workmanship for a period of time
defined on the following page from the first to occur of (i) the date the product is sold by
Lab-Line or (ii) the date the product is purchased by the original retail customer (the
“Commencement Date”). Except as expressly stated above,

LAB-LINE MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED, WITH
RESPECT TO THE PRODUCTS AND EXPRESSLY DISCLAIMS ANY AND ALL
WARRANTIES, INCLUDING BUT NOT LIMITED TO, WARRANTIES OF DESIGN,
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

An authorized representative of Lab-Line must perform all warranty inspections. In the
event of a defect covered by Lab-Line’s warranty, Lab-Line shall, as its sole obligation
and exclusive remedy, provide free replacement parts to remedy the defective product.
In addition, for products sold by Lab-Line within the continental United States or
Canada, Lab-Line shall provide free labor to repair the products with the replacement
parts, but only for a period of ninety (90) days from the Commencement Date.

Lab-Line’s warranty provided hereunder shall be null and void and without further force
or effect if there is any (i) repair made to the product by a party other than Lab-Line or
its duly authorized service representative, (ii) misuse (including use inconsistent with
written operating instructions for the product), mishandling, contamination, overheating,
modification or alteration of the product by any customer or third party or (iii) use of
replacement parts that are obtained from a party who is not an authorized dealer of Lab­Line.

IN NO EVENT SHALL LAB-LINE BE LIABLE TO ANY PARTY FOR ANY DIRECT,
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OR FOR
ANY DAMAGES RESULTING FROM LOSS OF USE OR PROFITS, ANTICIPATED
OR OTHERWISE, ARISING OUT OF OR IN CONNECTION WITH THE SALE, USE
OR PERFORMANCE OF ANY PRODUCTS, WHETHER SUCH CLAIM IS BASED ON
CONTRACT, TORT (INCLUDING NEGLIGENCE), ANY THEORY OF STRICT
LIABILITY OR REGULATORY ACTION.

The name of your nearest authorized Lab-Line dealer may be obtained by calling 1­800-522-5463.

1999 North 15th Ave.

PHONE: [phone] or [phone]; FAX: [phone]

, Melrose Park, IL 60160-1491 USA

WARRANTY

29

Page 2 of 2

12 MONTH PARTS WARRANTY:

• All Environmental Chambers

• Low Temperature B. O. D. Incubators

• Animal Study Chamber

• Controlled Environment Centers

• Biological Work Station

• Refrigerators, Freezers

• Chromatography Refrigerators (5 year parts warranty on compressor only)

• Large Capacity Refrigerators and Freezers (5 year parts warranty on compressor

only)

24 MONTH PARTS WARRANTY:

• Frame Clamps, Frame Sets, Lab Jacks

• Saybolt Viscosimeter

• Timers, Samplers, Flasks

• Saf-T-Shield, Safety Tongs

• All Incubators & Ovens

• Dual Action Open Air Shaker

• Reciprocating Shakers (open air and water bath)

• Rockers and Rotators

• Low Cost Shakers

• Environ Blok Shaker

• Titer Plate Shaker

• Multi Wrist Shaker

• Water Baths (excluding Aquabaths), Ultrasonic Cleaners

• Slide Warmers

• Mixers, Stirrers, Hotplates

• Thermal Cyclers

• Blok Heaters

• Aquabaths, lifetime warranty on heaters

LIFETIME PARTS WARRANTY:

• All ORBITAL Shakers (not carrying a 24 month parts warranty) offer a lifetime

parts warranty on the drive mechanism and a 5 year warranty on all other parts

• Refrigerated Orbital Shakers carry a lifetime warranty on the drive mechanism,

1 year parts warranty on the compressor, and a 5 year warranty on all other
parts.

30

FIRST IN INSTRUMENTS SERVICING SCIENCE, INDUSTRY,

RESEARCH AND EDUCATION

SINCE 1908.

31

32

ACCESSORY CHECKLIST

The following loose parts and accessories are packed with
this unit. Before discarding any packing materials, please be sure that
nothing has been overlooked.

MODEL NO: 3608, 3608MP, 3608-1CE, 3608-5, 3608-6CE, 3618, 3618-1CE,

3618-5, 3618-6CE

CHECKED BY: __________

DATE __________

PACKED BY __________

CHECKED ITEM PART NUMBER QUANTITY

_________ Operation Manual 056-602-00 1

_________ Thermometer 910-017-00 1

(All models except those
with a -5, or -6 designation)

_________ Shelf Assembly: 3608, 3608-1 810-439-00 1

_________ Shelf Assembly: 3618, 3618-1 810-440-00 1

_________ Warranty Card 528-022-00 1

33