Koehler K39400 Guide

Operation and Instruction Manual
REV D
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
K39400, K39496
Water Separability Tester

CERTIFICATE OF CONFORMANCE
Water Separability Tester
K394XX
This certificate verifies that part number K394XX, Water Separability Tester, was
manufactured in conformance with the applicable standards set forth in this
certification.
Specifications: ASTM D1401
ASTM D6074
ASTM D6158
ISO 6614
DIN 51599
FTM 791-3201
NF T 60-125
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

K394XX Water Separability Tester
Operation and Instruction Manual
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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

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Operation and Instruction Manual
K394XX-Manual -2-
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.
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).

K394XX Water Separability Tester
Operation and Instruction Manual
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Table of Contents
1Introduction....................................................................................................................4
1.1 Koehler's Commitment to Our Customers ............................................................................................. 4
1.2 Recommended Resources and Publications......................................................................................... 4
1.3 Instrument Specifications....................................................................................................................... 4
2Safety Information and Warnings.................................................................................5
3Getting Started...............................................................................................................5
3.1 Packing List............................................................................................................................................ 5
3.2 Unpacking .............................................................................................................................................. 5
3.3 Setup...................................................................................................................................................... 6
4Descriptions...................................................................................................................7
4.1 Description of Instrument Controls......................................................................................................... 7
4.2 Temperature Controller Operation......................................................................................................... 7
5Operation........................................................................................................................9
5.1 Bath........................................................................................................................................................ 9
5.2 Power..................................................................................................................................................... 9
5.4 Test Control Panel Operation .............................................................................................................. 11
6Safety Features............................................................................................................12
6.1 Over Temperature Protection .............................................................................................................. 12
6.2 Over Power Protection.........................................................................................................................12
7Maintenance.................................................................................................................13
7.1 Routine Maintenance........................................................................................................................... 13
7.2 Bath Cleaning....................................................................................................................................... 13
7.3 Replacement Parts............................................................................................................................... 13
8Wiring Diagrams ..........................................................................................................14
8.1 K39400 Unit Wiring.............................................................................................................................. 14
8.2 K39496 Unit Wiring.............................................................................................................................. 17
9Service..........................................................................................................................20
10 Storage .........................................................................................................................20
11 Warranty.......................................................................................................................20
12 Returned Goods Policy...............................................................................................20
Notes..................................................................................................................................21

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1 Introduction
The Koehler Water Separability Tester is the
latest design for performing the ASTM D1401
test method and related test specifications.
The ability of a lubricating oil to separate from
water and resist emulsification is an important
performance characteristic for applications
involving water contamination and turbulence.
Water Separability is determined by stirring
equal volumes of water and sample together at
a controlled temperature to form an emulsion
and observing the time required for separation of
the emulsion to occur. This method is suitable
for petroleum oils and synthetic fluids
This manual provides important information
regarding safety, technical reference, installation
requirements, operating condition specifications,
user facility resource requirements, and
operating instructions for the Water Separability
Instrument and Data Acquisition Software. 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]
e-mail: [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 D1401: Water Separability of
Petroleum Oils and Synthetic Fluids
2. International Organization for
Standardization (ISO)
1, rue de Varembé
Case postale 56
CH-1211 Geneva 20, Switzerland
Tel: [phone]
Fax: [phone]
http://www.iso.org
ISO Publication:
•ISO 6614: Determination of Water
Separability of Petroleum Oils and
Synthetic Fluids
3. Deutsche International Norm (DIN)
http://www.din.de
DIN Publication:
•DIN 51599: Water Separability of
Petroleum Oils and Synthetic Fluids
4. Federal Test Method (FTM)
FTM Publication:
•FTM 791-3201: Water Separability of
Petroleum Oils and Synthetic Fluids
1.3 Instrument Specifications
Models:
K39400
K39496
Electrical
Requirements: 115V 60Hz 12 A
220-240V 50/60Hz 6A
Stirrer Speed
Range: 1100-2000RPM
Stirrer Accuracy:
±10 RPM

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Drive:
1/10 hp (75w) High
Torque
Run Time:
1-50 Minutes
Temperature
Range: Ambient to 84°C
Temperature
Control Stability: ± 0.05°C
Capacity:
Seven (7) 100mL
graduated cylinders
Construction:
Stainless Steel Tank
12 x 9.8 x 10.7 in.
Bath Medium:
Distilled Water or
Suitable Heat Transfer
Fluid
Bath Medium
Capacity:
4.5 gal (17L)
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 because it 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.
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.
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.
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.
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
•K394XX Water Separability Tester
•332-002-018 100mL Graduated Cylinder, (7)
•K394XX-Manual K394XX Water Separability
Instrument Operation and Instruction Manual
Accessories (purchased separately):
•250-000-19F ASTM 19F Thermometer
•250-000-19C ASTM 19C Thermometer
•250-000-21F ASTM 21F Thermometer
•250-000-21C ASTM 21C Thermometer
•K39400-SFW Water Separability Data
Acquisition Software
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.

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4. Make two additional vertical cuts, using box
cutter, along length of two sides of the box
and remove packing foam.
5. 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 accompanying figure.
6. Lift instrument from cart and place on bench.
7. 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:Make sure the
instrument in placed 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.
WARNING:Remove the shipping /
transport screw from the back of the stirrer
motor assembly prior to operation
WARNING:Certain mechanical stresses
applied to the tempered glass front panel jar
pose a hazard to personnel. Impacts to these
during normal operation can shatter the glass
components releasing the bath fluid posing
thermal burn hazards and slipping hazards. For
this reason the instrument must be operated by
and accessible only to trained and authorized
personnel and located in an area where this type
of impact is likely to occur.
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
•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.
Thermometer. Place the thermometer with the
thermometer holder into the hole located at the
top plate of the main unit towards the middle of
the unit.
Glassware. Place the seven (7) 100mL
graduated cylinders into the seven (7) sample
position ports.

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4 Descriptions
4.1 Description of Instrument Controls
Figure 1: Instrument Descriptions
1. Power Switch. This switch controls the
power to the entire unit. When the power
switch is in the on position, the digital
temperature controller and test control panel
are powered on.
2. Lamp Switch. This switch controls turning
On and Off the lamp for illuminating the test
samples. This function available only after
power switch is turned on.
3. Temperature Controller. The temperature
controller regulates the bath temperature for
the test procedure. Please refer to section
4.2 for full operational details.
4. Test Control Panel. The test control panel
regulates the test parameters and stirrer
paddle activation. Please refer to section
4.3 for full operational details.
5. Heating Bath: Stainless Steel Bath with
clear tempered glass front viewing window
for stabilizing the bath temperature to
desired setting within ± 0.05°C.
6. Cylinder Ports: The test cylinder is placed
into the heating bath through one of the
seven (7) cylinder ports.
7. Stirrer Assembly:Ensure the stirrer is in
the upper position and move the entire
stirrer assembly left or right to align with one
of the seven test positions. Once aligned
with desired position, slide stirrer shaft
downwards into the glass test cylinder. Be
sure the notches of the stirrer shaft handle
align with the groves on top of the stirrer
assembly.
8. Stirrer Shaft Handle. For sliding the stirrer
shaft to the upper standby position or lower
test position
WARNING:For safety, disconnect the
power when performing any maintenance and/or
cleaning. Do NOT remove cover (bellow) while
instrument is energized!
4.2 Temperature Controller Operation
Figure 2. Temperature Controller
1. Process Temperature Display. The
upper red LED display shows the
process temperature as read from the
RTD probe.

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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
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 the 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. This will
provide the proper depth for immersing the
viscometers and allow for thermal expansion.
NOTE:Do not attempt moving the bath
when filled with fluid medium. Drain all fluid
using the drain valve at the back of the
instrument before moving or relocating. 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 is Mandatory
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)
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 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
Turn on the main power switch 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.
5.3 Starting a Test
Before running a test, make sure the unit is
level. Otherwise, the results will be affected.
1. Install an appropriate ASTM thermometer or
PT100 Temperature in the cover plate of the
bath using the holder provided.
2. Verify Temperature controller calibration in
accordance to an external temperature
reader and set the desired operation
temperature using the temperature controller
(See Section 4.3 for full operational details).
3. Prepare and place up to seven samples into
the sample holders on the top front of the
unit and lower until bottom of cylinder is in
complete contact with the metal base.
WARNING:Do not test or run materials
that boil or exhibit high vapor pressure at the
bath test temperature.
IMPORTANT:Allow the bath AND the sample
enough time to reach the temperature before
starting measurements. Allow 10-15 minutes
for the bath to equilibrate. Do not add medium
to the bath while a test is being performed.
Additional medium will disrupt the temperature

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equilibrium of the bath and cause erroneous
test results.
4. Use the black knob on the stirrer shaft for
extending and retracting the shaft to prevent
sample contamination.
5. Raise the stirrer shaft until it is in the fully
retracted position and ensure the stirrer
shaft paddle will not hit the cylinder when
the head assembly is moved. See Figure 3
below:
Figure 3
WARNING:Ensure the stirrer shaft is
fully retracted, in the upward position when
moving the stirrer head assembly left or right
along the rail. Otherwise, shaft may get bent
or damaged and will no longer be useful for
operation.
6. Lift the Stirrer shaft up then move the head
assembly left or right until stirrer paddle is
over the sample to be tested. Lifting the
shaft up unlocks the stirrer in order to freely
move the head assembly. Only when the
stirrer assembly is in a correct test position
will the stirrer lock into place for testing. See
Figure 4.
Figure 4
7. Lower the stirrer shaft down into the test
cylinder. See Figure 5:
Figure 5
8. Continue lowering the stirrer shaft down into
the sample cylinder (Figure 6) until the
alignment pin located near the knob is fully
engaged with the slot of the stirring
mechanism and the magnetic discs on the
stirrer knob and head assembly fully connect
(Refer to Figures 6 and 7)

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Figure 6. Incorrect Figure 7. Correct
WARNING:The stirrer shaft must be
fully engaged and locked in place before
starting stirrer motor. Please refer to Figure
8for appropriate height of paddle when
stirrer assembly is fully engaged.
Figure 8
9. With a sample ready and the stirrer placed
inside the sample, set the desired
parameters on the test control panel (See
Section 5.4 for full operational details) and
press the Start Test button to commence
the test.
10. When the timer reaches 0:00, the stirrer
motor will stop and an audible alarm will
sound for 10 seconds to signify the end of
the stirring period. The Stop button may be
used to interrupt the 10 second audible
alarm.
11. At the end of the stirring period, please
follow the appropriate test method such as
those listed in section 1.2 for determining
the water separability of the test sample.
Use the lamp to help illuminate the sample
for better viewing. Follow these steps again
for testing the next sample.
5.4 Test Control Panel Operation
Figure 9: Start Up Screen
Setting the Speed and Timer
Figure 10: Set up Screen
1. The Set Speed / Time Screen allows the
user to set the test parameters prior to
running a test
2. Press the box to the left of RPM to set the
stirring speed
3. Press the box to the left of MIN to set the
duration of the test
4. Press START TEST to begin running the
test.
NOTE:Please note that the START TEST
button will not appear until the stirrer shaft is
lowered and fully engaged in the proper test
position. See Figures 11 and 12.

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Figure 11. Stirrer Not Engaged
Figure 12. Stirrer Engaged
Figure 13: Run Screen
5. After pressing the START TEST button, the
Running Screen (Figure 13) will appear.
6. To pause the test, press the PAUSE button.
Pressing the PAUSE button twice will end
the test and lead the user back to the set up
screen. Press the CONTINUE button to
continue running the test.
6 Safety Features
The Koehler Water Separability Apparatus 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 Water Separability Apparatus 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 Water Separability Apparatus 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.

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Operation and Instruction Manual
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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,
please do not hesitate to contact the Koehler
technical service department.
NOTE: The bearings on the linear rail
are maintenance-free, lubrication-free. Do not
attempt to apply any lubricants to rail or
bearings. If sticking or slipping occurs, contact
the technical service department.
7.1 Routine Maintenance
The Koehler Water Separability Instrument
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. A drain is also
provided in the back of the unit to empty the
bath of medium.
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.
7.3 Replacement Parts
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).
Part Number
Description
050-001-028
Switch, Single Pole, 15A
050-001-044
Switch, SPST, 15A
120/220V Rocker
091-032-001
Relay, Solid St, 4-
32VDC, 20A
265-122-002
RTD Temp Probe, 0.25 x
3’’, 2 Wire
271-015-004
Circuit Breaker, 2 Pole,
15A
275-103-027
Temp Cntrl, 100-240V,
W/RS232 BRD
332-002-018
Graduated Cylinder,
100mL
K39400-03054
Heater 1250W, 115V
K39400-03055
Heater 1250W, 220V
K23700-03013A
Motor, Modified, 115V
50/60Hz
K23700-03014A
Motor, Modified, 230V
50/60Hz
K39400-03025
Stirrer Shaft
282-014-016
Line cord, 115V
282-014-017
Line cord, 230V
240-230-004
Transformer 220 to 120V

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Operation and Instruction Manual
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8 Wiring Diagrams
8.1 K39400 Unit Wiring

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Operation and Instruction Manual
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Operation and Instruction Manual
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