Koehler K430X2 Guide

Operation and Instruction Manual
REV C
Koehler Instrument Company, Inc.
1595 Sycamore Avenue • Bohemia, New York 11716-1796 • USA
Toll Free: 1-800-878-9070 (US only) • Tel: [phone] • Fax: [phone]
http://www.koehlerinstrument.com • e-mail: [e-mail]
Petroleum Testing & Analysis Instrumentation • Custom Design & Manufacturing
K430X2
Dual Twin Foaming
Characteristics Test Apparatus

CERTIFICATE OF CONFORMANCE
Liquid Foaming Characteristics Apparatus
K430X2
This certificate verifies that part number K430X2, Liquid Foaming Characteristics
Apparatus, was manufactured in conformance with the applicable standards set
forth in this certification.
Specifications: ASTM D892
IP 146
DIN 51566
FTM 791-3211
FTM 791-3213
NF T 60-129
This unit is tested before it leaves the factory, to ensure total functionality and
compliance to the above specifications and ASTM standards. Test and inspection
records are on file for verification.
Jesse Kelly
Application Engineer
Koehler Instrument Company

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WEEE Directive Compliance Statement
Background
The goal of the WEEE Directive is to encourage design of environment-friendly products that increase reuse,
recycling and other forms of recovery to reduce waste streams and applies to listed Electronic and Electrical
Equipment (EEE) and Koehler's equipment falls broadly into Appendix 1A; Section 9 Monitoring and Control
Equipment: Measuring, weighing or adjusting appliances for household or as laboratory equipment.
Any associated non-embedded equipment such as Lighting (Saybolt Color) and PCs/Printers also fall under WEEE.
If provided with an order these ancillary items must be WEEE compliant. For these and other reasons (printer
cartridges are regionalized) the equipment must be supplied through a third party supplier in Europe.
The WEEE Directive applies to electrical and electronic equipment falling under the categories set out in Annex IA
provided that the equipment concerned is not part of another type of equipment that does not fall within the scope
of this Directive. Annex IB contains a list of products which fall under the categories set out in Annex IA.
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2003:037:0024:0038:en:PDF
We do not qualify for any of the 10 exemption categories.
http://www.dpa-system.dk/en/WEEE/Products/Exemptions
Professional use
For equipment defined for ’professional use’ local authorities have no role to play. Producers and importers are
basically responsible for collection of WEEE recyclables from the professional user and for subsequent
management. A separate statement is given cataloging the items that require separation from the equipment
along with basic information on subsequent processing or recycling prior to disposal of the equipment.
http://www.dpa-system.dk/en/WEEE/Products/Private-or-professional-use
Responsibility for Registration and Annual Reporting:
Koehler will not sell directly to end users in the EU and so has no responsibility to register within each EU state and
to make annual reports. Koehler declares that this responsibility is born by the importer who is the first level of the
distribution chain and is subject to producer responsibility. We will communicate this in writing to our
distributor/importers in the EU stating they are responsible to satisfy WEEE registration and reporting requirements
in the EU states where they conduct sales activities.
It is illegal to market electrical and electronic equipment covered by producer responsibility without being
registered.
http://www.dpa-system.dk/en/WEEE/Producers/Whoissubjecttoproducerresponsibility
Product Design
Koehler's designs allow for complete disassembly to a modular level which usually allows for standard recycling. A
qualified refrigeration system technician must be consulted when disassembling and de-commissioning any
equipment with refrigeration systems.
Koehler's scientific testing equipment is robustly designed to function over a long service life and are typically
repaired many times over the course of years rather than being replaced. We believe that re-use and
refurbishment is the very best form of re-cycling.
All batteries must be readily removable not soldered in place.
Recycling instructions
In the event that replacement becomes necessary, we will include instructions, particularized to each instrument
that informs the customer of their recycling responsibilities and giving them guidance in doing this. All Koehler
equipment has been placed on the market since 13th August 2005 and so Koehler is defined as a "new WEEE
producer". As such we must provide information on refurbishment, treatment, and re-use.

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Our instrument manual will include this compliance statement and indicate that any collection of materials will be
handled by their authorized distributor. In the event that the distributor is unreachable or is no longer a distributor
for Koehler Instrument, Co., other arrangements may be made including accepting the materials directly.
Recycling is free of charge. Shipping is the responsibility of the end users. Whether shipping to a distributor or to
Koehler directly, safe, properly declared, and labeled packaging and shipping expenses are the sole responsibility
of the end user.
WEEE Marking
Since Koehler products are subject to the WEEE Directive we must display the WEEE symbol shown above in
accordance with European Standard EN 50419 on the equipment. It must be indelible, at least 5mm in height, and
clearly legible. If the equipment is too small the mark must be in the product literature, guarantee certificate, or on
the packaging. Rules on marking are established in section 49 of the WEEE Order.
Koehler Instrument Company, Inc.
c/o RECYCLING
1595 Sycamore, Ave.
Bohemia, NY 11716
As a minimum the following substances, preparations and components have to be removed from any separately
collected WEEE:
- Mercury containing components, such as switches or backlighting lamps (compact fluorescent lamps, CFL),
- Batteries
- Printed circuit boards if the surface of the printed circuit board is greater than 10 square centimeters (about 4 sq
in.),
- Toner cartridges, liquid and pasty, as well as color toner,
- Chlorofluorocarbons (CFC), hydrochlorofluorocarbons (HCFC) or hydrofluorocarbons (HFC), hydrocarbons (HC)
- Liquid crystal displays (together with their casing where appropriate) of a surface greater than 100 square
centimeters and all those back-lighted with gas discharge lamps,
- External electric cables
- Components containing refractory ceramic fibers as described in Commission Directive 97/69/EC of 5 December
1997 adapting to technical progress Council Directive 67/548/EEC relating to the classification, packaging and
labeling of dangerous substances (2),
- Electrolyte capacitors containing substances of concern (height > 25 mm, diameter > 25 mm or proportionately
similar volume)
2. The following components of WEEE that is separately collected have to be treated as indicated:
- Equipment containing gases that are ozone depleting or have a global warming potential (GWP) above 15, such
as those contained in foams and refrigeration circuits: the gases must be properly extracted and properly treated.
Ozone-depleting gases must be treated in accordance with Regulation (EC) No 2037/2000 of the European
Parliament and of the Council of 29 June 2000 on substances that deplete the ozone layer (4).

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Table of Contents
1Introduction ...................................................................................................................7
1.1 Koehler’s Commitment to Our Customers .............................................................................................7
1.2 Recommended Resources and Publications.........................................................................................7
1.3 Instrument Specifications.......................................................................................................................8
1.4 Software Specifications..........................................................................................................................8
2Safety Information and Warnings ................................................................................8
3Getting Started...............................................................................................................9
3.1 Packing List............................................................................................................................................9
3.2 Unpacking ..............................................................................................................................................9
3.3 Setup......................................................................................................................................................9
4Descriptions.................................................................................................................10
4.1 Main Instrument Controls.....................................................................................................................10
4.2 Flowmeter Setup and Operation ..........................................................................................................11
4.3 Flowmeter Calibration Data..................................................................................................................11
4.4 Temperature Controller Operation.......................................................................................................11
5Operation .....................................................................................................................13
5.1 Bath......................................................................................................................................................13
5.2 Power ...................................................................................................................................................13
5.3 Preparation of Glassware and Tubing .................................................................................................13
6Safety Features............................................................................................................14
6.1 Over-Temperature Protection ..............................................................................................................14
6.2 Over-Power Protection.........................................................................................................................14
7Maintenance.................................................................................................................14
7.1 Routine Maintenance ...........................................................................................................................14
7.2 Bath Cleaning.......................................................................................................................................14
7.3 Replacement Parts...............................................................................................................................15
8Wiring Diagrams..........................................................................................................16
8.1 Unit Wiring............................................................................................................................................16
9Troubleshooting..........................................................................................................17
9.1 Unit does not power up ........................................................................................................................17
9.2 Unit is on and keeps resetting into start up routine..............................................................................17
9.3 Unit is on but bath does not heat up ....................................................................................................17
9.4 Bath heats up but temperature does not stabilize................................................................................17
10 Service..........................................................................................................................17
11 Storage.........................................................................................................................17

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12 Warranty.......................................................................................................................17
13 Returned Goods Policy...............................................................................................18
Notes..................................................................................................................................19

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1 Introduction
The Koehler K430X2 High Temperature Dual
Twin Foaming Characteristics Test Apparatus is
the latest design for determining foaming
characteristics of lubricating oils according to the
ASTM D892 test method and related test
specifications.
This manual provides important information
regarding safety, technical reference, installation
requirements, operating condition specifications,
user facility resource requirements, and operating
instructions for the High Temperature Dual Twin
Foaming Characteristics Test Apparatus. This
manual should also be used in conjunction with
applicable published laboratory procedures.
Information on these procedures is given in
section 1.2.
1.1 Koehler’s Commitment to Our
Customers
Providing quality testing instrumentation and
technical support services for research and testing
laboratories has been our specialty for more than
50 years. At Koehler, the primary focus of our
business is providing you with the full support of
your laboratory testing needs. Our products are
backed by our staff of technically knowledgeable,
trained specialists who are experienced in both
petroleum products testing and instrument service
to better understand your requirements and
provide you with the best solutions. You can
depend on Koehler for a full range of accurate and
reliable instrumentation as well as support for your
laboratory testing programs. Please do not
hesitate to contact us at any time with your
inquiries about equipment, tests, or technical
support.
Toll Free: 1-800-878-9070 (US only)
Tel: [phone]
Fax: [phone]
Email: [e-mail]
http://www.koehlerinstrument.com
1.2 Recommended Resources and
Publications
1. American Society for Testing and Materials
(ASTM)
100 Barr Harbor Drive
West Conshohocken, Pennsylvania 19428-
2959, USA
Tel: [phone]
Fax: [phone]
http://www.astm.org
email: [e-mail]
ASTM Publication:
ASTM D892: Standard Test Method for
Foaming Characterisitics of Lubricating
Oils
2. Energy Institute (IP)
61 New Cavendish Street
London, WIM 8AR, United Kingdom
Tel: [phone]
Fax: [phone]
http://www.energyinstpubs.org.uk/
IP Publication:
IP 146: Foaming Characteristics of
Lubricating Oils
3. Deutsche International Norm (DIN)
http://www.din.de
DIN Publication:
DIN 51566
4. Federal Test Method (FTM)
FTM Publication:
FTM 791-3211
FTM 791-3213: Aircraft Lubricants Test
5. Association Française de Normalisation
(AFNOR)
http://www.afnor.fr
AFNOR Publication:
NF T 60-129

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1.3 Instrument Specifications
Models:
K43002
K43092
Electrical
Requirements:
115V, 60Hz, 15.6A
230V, 50/60Hz, 8.1A
Temperature
Range:
Left (Cold)Bath: 24°C
External Chiller required to
perform Sequence I and III
at 24°C
Right (Hot)Bath: Ambient
to 93.5°C (200°F)
Temperature
Control Stability:
Exceeds ASTM
requirements
Digital Setpoint and
Displays °C/°F
Built-in Over-temperature
Cut-off Protection
Capacity:
4 Test Cylinders
Bath Medium:
Water or suitable heat
transfer fluid
(see section 5.1)
Bath Medium
Capacity:
38.5L (9 gal) each
1.4 Software Specifications
PC System
Requirements:
Intel® Pentium II Processor
or similar (minimum)
Operating
System:
Windows® 98 SE, 2000, NT,
XP
Memory
Requirements:
256Mb RAM (512Mb RAM
recommended) 15 Mb Hard
Disk Space (minimum)
Other:
Two RS-232 communication
ports
Microsoft® Excel (97 or
above)
2 Safety Information and Warnings
Safety Considerations. The use of this
equipment may involve hazardous materials and
operations. This manual does not purport to
address all of the safety problems associated with
the use of this equipment. It is the responsibility of
any user of this equipment to investigate,
research, and establish appropriate safety and
health practices and determine the applicability of
regulatory limitations prior to use.
Equipment Modifications and Replacement
Parts. Any modification or alteration of this
equipment from that of factory specifications is not
recommended voids the manufacturer warranty,
product safety, performance specifications, and/or
certifications whether specified or implied, and
may result in personal injury and/or property loss.
Replacement parts must be O.E.M. exact
replacement equipment.
Over Temperature Protection. This unit is
equipped with Over Temperature Protection (OTP)
circuitry to prevent overheating. The unit will
automatically interrupt power whether equipment
malfunction or operator error causes the
temperature to exceed either 20 °C above the set
point or the maximum recommended temperature
range. The power can only then be restored by
identifying and correcting the problem, allowing
the unit to return to normal operating
temperatures, and resetting the power to the unit.
Unit Design. This equipment is specifically
designed for use in accordance with the applicable
standard test methods listed in section 1.2 of this
manual. The use of this equipment in accordance
with any other test procedures, or for any other
purpose, is not recommended and may be
extremely hazardous.
Chemical Reagents Information. Chemicals and
reagents used in performing the test may exhibit
potential hazards. Any user must be familiarized
with the possible dangers before use. We also
recommend consulting the Material Data and
Safety Sheet (MSDS) on each chemical reagent
for additional information. MSDS information can
be easily located on the internet at
http://siri.uvm.edu or http://www.sigma-
aldrich.com.

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3 Getting Started
The instructions for preparing the equipment
assume that the user is aware of the contents of
this document, which lists the warranty conditions
and important precautions.
3.1 Packing List
K430X2 Foaming Characteristics Test
Apparatus including:
- (4) 1000mL Test Cylinders (K43012)
- (4) Calibrated and Certified Diffuser Stones
(344-100-01C)
- (4) Air Delivery Tube Assemblies (K430-3A)
- (4) Air Outlet Tubes (K430-0-13)
- (4) Rubber Stoppers (K430-0-8)
- (2) 12 x 18 Pyrex Bath Jar (332-001-003)
-(1) 18” Safety Shield and Base (K23425-00000)
- (1) Test Tube Rack (K43002-0-13)
K430X2-Manual Dual Twin Foaming
Characteristics Test Apparatus Operation and
Instruction Manual
3.2 Unpacking
1. Check Shock Watch Label on Cardboard Box
for indication of rough handling and possible
damage.
2. Check labeling for correct orientation of
instrument. (e.g. This Side Up)
3. Carefully open top of box with box cutter and
remove packing foam.
4. Look inside bath from top of box, to verify that
the Glass Bath Jar is in tact.
5. Make two additional vertical cuts, using box
cutter, along length of two sides of the box
and remove packing foam.
6. Extract instrument and place on suitable cart
for transportation to work area / lab bench.
WARNING: Be sure two or more individuals
are available for extracting and lifting instrument
from box to cart and from cart to bench.
Individuals must lift in accordance to proper
technique. See Figure below.
7. Lift instrument from cart and place on bench.
8. Ensure that all parts listed on the packing list
are present. Inspect the unit and all
accessories for damage. If any damage is
found, keep all packing materials and
immediately report the damage to the carrier.
We will assist you with your claim, if
requested. When submitting a claim for
shipping damage, request that the carrier
inspect the shipping container and equipment.
Do not return goods to Koehler without written
authorization.
3.3 Setup
Equipment Placement. Place the base on a firm,
level table in an area with adequate ventilation or
in a hood. The unit may be leveled by making
minor turning adjustments to the feet located at
the base of the unit. Please note that Koehler does
not supply a level with this equipment.
Install the borosilicate test jars. Fill each jar with
appropriate bath medium as per ASTM D892.
Please see section 5.1 for further details on
appropriate bath medium.
Install the bath top assemblies on the jars and
plug the control cables into the receptacles on the
base unit. Refer to section 4.2 and 4.3 for proper
location of tops. Left Bath = Cold Bath. Right Bath
= Hot Bath.
Install the RTD probes in each bath tops with the
corks / thermometer probe holders provided
Environmental Conditions: The instrument
environment must comply with the following
conditions for proper setup:
No / Low Dust
No direct sunlight
Not near heating or AC ventilation ducts
No Vibrations
Clearance from other instruments

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Temperature Range: 5 to 40°C
Elevation to 2000 meters
Relative Humidity: < 80%
Ventilation. A fume hood or exhaust system is
required when operating the unit. Flammable
vapors and/or steam are generated during
operation and must not be permitted to
accumulate. A canopy-style hood may be used if
the height from the top of the unit to the canopy is
5 feet or less. The exhaust blower should have a
rating of 1000 C.F.M. or greater.
Power. Connect the line cords to properly fused
and grounded receptacles with the correct voltage
as indicated in section 1.3 or on the back of the
unit.
WARNING: For safety, disconnect the
power when performing any maintenance and/or
cleaning. Do NOT turn the power on unless the
bath is filled with the proper medium; otherwise,
damage may occur to the unit and the warranty
will be void.
4 Descriptions
4.1 Main Instrument Controls
Figure 1: Main Instrument Descriptions
1. Power Switch. This switch controls the power
to motor and heater / temperature controller of
its corresponding side. When the power switch
is in the ON position, the digital temperature
controller and the stirrer are powered on.
2. Temperature Controller. The temperature
controller regulates the bath temperature its
corresponding bath. Refer to Section 4.3 for
full operational details.
3. Flowmeters. To regulate the flow of air into
each air delivery tube assembly.
4. Stirrer Motor. The stirrer constantly circulates
bath medium to prevent temperature gradients
and ensures temperature stability. When
cleaning and/or servicing, please be sure to
disconnect unit power to avoid possible injury.
5. Heat Shield. An 18” safety shield is provided
to protect the user from accidentally touching
the “Hot” Bath while operating the instrument.
6. Temperature Probe. Detects the bath
temperature and communicates with the
temperature controller to maintain desired
temperature for each bath.
7. Air Delivery Tube. Connect to air conditioning
coil and flowmeter for passing air through gas

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diffuser located at the bottom of the Test
Cylinder.
8. Cold Bath. For performing Sequence I and III
test procedures.
9. Hot Bath. For performing Sequence II test
procedures.
4.2 Flowmeter Setup and Operation
1. Connect the inlet on the flowmeter manifold
fitting to a source of clean dry air. Instrument
grade compressed air is recommended for this
application. Tygon or heavy wall rubber tubing
is suitable for connection to the manifold.
2. Adjust the inlet air pressure to the regulator to
fifteen (15) psi for normal operation.
3. Connect the outlets on the flowmeters to the
air tube assemblies using new ¼” tygon
tubing.
4. Set the proper airflow by first consulting the
flowmeter calibration data in section 4.3. Find
the millimeter mark that will yield a flow of 94
ml/min.
5. Adjust the valve on the flowmeter, so that the
ball float in the tube is centered on the
millimeter value specified in the data.
6. Permit the air to flow for the duration specified
in the test procedure and disconnect the tygon
tubing from the flowmeter outlet when the
aeration period as elapsed.
4.3 Flowmeter Calibration Data
K43002-0-12 Air Flow Rate 94 mL/min
Float Material:
Sapphire
Float Density:
3.98 g/ml
Metered Fluid:
Air
Minimum Flow:
16.4 ml/min
Maximum Flow:
159.0 ml/min
Tolerance:
± 2% F.S
Scale Reading (mm)
Flowrate (ml/min)
65
159.0
60
139.0
55
121.2
50
104.7
45
90.8
40
77.8
35
66.0
30
56.0
25
46.5
20
38.3
15
30.5
10
23.0
5
16.4
4.4 Temperature Controller Operation
Figure 4. Temperature Controller
1. Process Temperature Display. The
upper red LED display shows the process
temperature as read from the RTD probe.
2. Set Point Temperature Display. The
lower green LED display shows the set
point temperature of the controller.
3. Programming Key. Permits scrolling
through controller menu parameters. One
Level Forward
4. Down Key. Used to decrease the set
point temperature and to decrease or
change parameter values when
programming the temperature controller.
5. Up Key. Used to increase the set point
temperature and to increase or change
parameter values when programming the
temperature controller.
6. Exit / Function Key. This key is used to
exit or leave a level. One level backward

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IMPORTANT NOTE: The digital
temperature controller for the unit comes
pre-programmed from the Koehler factory.
Please do NOT attempt to re-program the
digital temperature controller as this will
void the product warranty. If assistance is
required, please do not hesitate to contact
the Koehler technical service department.
Setting the Temperature. Set the desired
operating temperature by adjusting the set
point with the up and down keys. The set point
will be displayed in the lower green Set Point
LED display and the actual temperature will be
displayed in the upper red Process LED
display. Please allow the instrument to fully
equilibrate before proceeding with any testing.
Temperature Calibration. This routine allows the
digital temperature controller to be calibrated
to a certified thermometer.
a. Use a certified calibrated measuring
device to acquire the temperature.
Calculate the difference between the
measuring device and the Process value
displayed on the controller.
b. Press the program key two times until PCt
is displayed in the lower green LED
display. Press the DOWN key. CAL will
display on the lower green display. If there
is a value observed in the upper red LED
display, add it to the calculated difference
obtained in the previous step. This is the
offset value.
c. Press the Program Key. The lower green
display will flash. Use the up or down keys
to adjust to the new calibration offset
value on the upper red display calculated
in the previous step. When the value has
been entered, the controller will
automatically store the value. The lower
green display will stop flashing. If further
adjustments are necessary, press the
Program Key again. Resume regular
operations by pressing the Exit / Function
key two times. Verify if the new calibration
is correct by observing the upper red
display and comparing the value with the
calibrated reference device.
Auto Tune. This routine allows the digital
temperature control to learn the heating
parameters needed for any particular set point
temperature. This operation should be done
when installing a new unit, after replacing or
changing the bath medium type, or utilizing a
different temperature set point 20% different
from the previously used set point
temperature.
a. Set the operating temperature to the
desired setting.
b. Press the up and down arrow buttons
simultaneously for about 5 seconds. When
Auto Tune is active, the lower green LED
display will blink TUNE. Auto Tune will
automatically toggle off when the set point
temperature is reached. Auto tune can be
terminated by pressing the up & down
buttons simultaneously again.

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5 Operation
5.1 Bath
Fill each bath with the appropriate heat transfer
fluid based upon the testing temperature. Fill the
bath with the medium from the top through one of
the seven port openings using a wide neck funnel
with a 500mL griffin beaker adding about ½ L at a
time to 2" (5 cm) from the top of the bath to allow
room for fluid expansion.
NOTE: Do not attempt moving the
instrument when filled with fluid medium. Drain all
fluid before moving or relocating the instrument.
See section 7.2 of this document. Sudden starting
and stopping could result in hot bath fluid being
forcefully ejected from the bath. It could also result
in overbalancing and tipping over the instrument.
NOTE: Do not drain the bath until the fluid is at
ambient temperature.
Testing
Temperature
Recommended Fluid
15 - 50°C*
Distilled water will be suitable.
50 - 95°C
Koehler supplies highly
refined white technical oil
(part # 355-001-001) that
contains an oxidation inhibitor
to limit clouding at higher
temperatures.
CAS# 8042-47-5
Minimum Flash Point: 120°C
(248°F)
Fire Point: 202°C (395°F)
95 - 150°C
Koehler supplies a clear
silicone heat transfer fluid
(part # 355-001-002) with high
oxidation resistance and low
volatility. CAS # 63148-62-9.
Minimum Flash Point: 200°C
(392°F).
NOTE: Do not use bath fluids that will
decompose or volatilize producing flammable
vapors below the maximum instrument operating
temperature +25°C.
NOTE: Coloration of the Mineral or Silicon Bath
Oil is an indication that the Medium must be
changed. See Draining instructions in section 7.3
of this document. When a decision is made to
discard this material, dispose of this material and
its container to a hazardous of special waste
collection point. Country, State, or local laws may
impose additional regulatory requirements
regarding disposal. Dispose in accordance to all
applicable regulations.
WARNING: Bath oils contaminated with
light ends can pose a flammability hazard.
5.2 Power
1. Turn on the main power switches to the unit.
WARNING: Do NOT turn the power on
unless the bath is filled with the proper medium;
otherwise, damage may occur to the unit and the
warranty would be void.
2. The temperature controllers will illuminate and
display the actual and set point temperatures.
3. Set each bath temperature to desired test
temperatures as per ASTM D892 using the
operating instructions in section 4.4.
5.3 Preparation of Glassware and Tubing
1. Clean the graduated cylinders as per ASTM
D892 instructions and pour the test samples
into the cylinders to the recommended level as
per the aforementioned test methods.
2. Clean and flush the air delivery tube assembly
with diffuser stone as per ASTM D892.
3. Place the four 1000 ml test cylinders into the
tops & lock in place with the four clamps
provided on each top.
4. Proceed with the test and record the test
results in accordance to ASTM D892.

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6 Safety Features
The Koehler K430X2 Dual Twin Foaming Test
Bath is equipped with several safety and
protection features, which are described in the
following sections.
WARNING: The bath is NOT Explosion
Proof.
6.1 Over-Temperature Protection
The Koehler K430X2 Dual Twin Foaming Test
Bath is equipped with Over-temperature Protection
(OTP) circuitry, which prevents the unit from
exceeding unsafe operating temperatures. If the
unit cannot maintain the set point temperature and
begins to decline, the OTP circuitry may have
been activated. Please follow these steps.
1. Turn off the unit power switch and disconnect
the line cord.
2. Determine the source of the problem and
correct the situation.
3. Restart the unit. Monitor the operations to
ensure that the unit is operating properly. If
you are still experiencing trouble, please
contact Koehler technical service for
assistance.
6.2 Over-Power Protection
The Koehler K430X2 Dual Twin Foaming Test
Bath is equipped with Over-power Protection
circuitry, which prevents the unit from unsafe
electrical conditions. If power to the unit is lost,
then turn off the main power and turn it back on
again. The main power switch also functions as a
circuit breaker.
7 Maintenance
WARNING. Disconnect power to the unit
before servicing to avoid exposure to high
voltages and/or temperatures which may result in
personal injury or death. If you have any questions
about maintaining your equipment, then please do
not hesitate to contact the Koehler technical
service department.
7.1 Routine Maintenance
The K430X2 Dual Twin Foaming Test Bath
requires little routine maintenance to provide many
years of continuous service. However, over the
course of time, some instrument parts may need
to be replaced. When ordering replacement
part(s), please provide the model number, serial
number, and product shipment date of your
equipment so that we can ensure you will receive
the proper replacement part(s).
7.2 Bath Cleaning
To clean the instrument’s exterior, which
includes all painted surfaces and glass, either
a solution of soap and water or laboratory
grade detergent may be used.
Apply cleaner to clean wipe or cloth, not to the
instrument directly. Wipe surface clean.
Do Not clean bath exterior with organic
chemicals such as Acetone, Toluene, Hexane,
etc.
For more difficult cleaning of finished surfaces,
a dilute solution or isopropanol in water may
be used.
It is not recommended that more aggressive
solvents be used on painted surfaces since
paint color will tarnish or be stripped from the
instrument.
Glass surfaces may be cleaned using a more
aggressive solvent such as acetone, if
necessary.
SHOCK AND BURN HAZARD: Only clean
inside the bath when equipment is de-energized
and unplugged from the mains power supply.
Allow adequate time for heating coils to completely
cool before cleaning.

K430X2 Dual Twin Foaming Characteristics Test Bath
Operation and Instruction Manual
K430X2-Manual -15-
7.3 Replacement Parts
Part Number
Description
090-120-010
Relay, 120V
091-120-001
Solid State Relay, 120V
091-240-004
Solid State Relay, 240V
167
Thermometer / Probe Holder
265-400-002
RTD Temperature Probe
275-103-044
Temperature Controller, 100-240V, 50/60Hz 7A
278-001-002
Fuse, 1A, Slo-Blo, 5 X 20 mm
332-001-003
12 x 18 Borosilicate Bath Jar
K23425-03000
18” Safety Shield
K23700-03014A
Motor 230V 50/60HZ 1/15HP
K430-0-13
Air Outlet Elbow Tube
K430-0-8
Rubber Stopper
K430-3A
Air Inlet (Delivery) Tube without diffuser
K43002-0-12
Low Flowmeter
K43002-0-13
Test Tube Rack
K43002-0-15
Locking Post Assembly
K43012
1000ml Cylinder w/ Ring
K43002-0-9
Hot Bath Outer Heater, 750W, 115V
K43002-0-11
Hot Bath Inner Heater, 750W, 115V
K43092-0-9
Hot Bath Outer Heater, 750W, 230V
K43092-0-11
Hot Bath Inner Heater, 750W, 230V

K430X2 Dual Twin Foaming Characteristics Test Bath
Operation and Instruction Manual
K430X2-Manual -16-
8 Wiring Diagrams
8.1 Unit Wiring