Koehler K60094 Guide

Operation and Instruction Manual
REV B
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
K60094
Portable Heated Oil Test Centrifuge

CERTIFICATE OF CONFORMANCE
Heated Oil Test Centrifuge
K60094
This certificate verifies that part number K60094, Heated Oil Test
Centrifuge, was manufactured in conformance with the applicable
standards set forth in this certification.
Specifications: ASTM D96
API MPMS Chapter 10.4
API 2542
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

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -1-
Table of Contents
1Introduction ................................................................................................ 2
1.1 Koehler’s Commitment to Our Customers .......................................................................2
1.2 Recommended Resources and Publications...................................................................2
1.3 Instrument Specifications.................................................................................................2
2Safety Information and Warnings ............................................................. 3
3Getting Started............................................................................................ 3
3.1 Packing List......................................................................................................................3
3.2 Unpacking ........................................................................................................................3
3.3 Installation ........................................................................................................................4
3.4 Accessories for Running Tests ........................................................................................4
4Descriptions................................................................................................ 4
4.1 Portable Oil Test Centrifuge.............................................................................................4
4.2 Control Panel....................................................................................................................5
4.3 Temperature Controller....................................................................................................5
5Operation .................................................................................................... 6
5.1 Power Connection............................................................................................................6
5.2 Test Procedure.................................................................................................................6
6Maintenance................................................................................................ 8
6.1 Routine Maintenance .......................................................................................................8
6.2 Replacement Parts...........................................................................................................8
7Wiring Diagram........................................................................................... 9
8Troubleshooting....................................................................................... 10
8.1 The test will not start ......................................................................................................10
8.2 The motor stalls or will not come up to speed properly..................................................10
8.3 The unit does not heat up ..............................................................................................10
9Service....................................................................................................... 10
10 Storage...................................................................................................... 10
11 Warranty.................................................................................................... 10
12 Returned Goods Policy............................................................................ 10
Notes............................................................................................................... 11

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -2-
1 Introduction
The K60094 Oil Test Centrifuge is a portable
model centrifuge designed expressly for the
determination of water and sediment of crude oil
during field custody transfers. This unit
accommodates two centrifuge tubes of ASTM
conical type 6". The molded PTFE supports provide
for maximum protection and easy positioning of the
tubes. Includes an integrated tube holder (2) and
pre-heater (2) for ease of sample handling and pre-
conditioning.
Accommodates two 6” conical centrifuge short
tubes
Analog Speed Control
Integrated Tube Holder (2) and Pre-heater (2)
Independent Digital Temperature Displays for
both the Bowl and Pre-heater temperature
Switchable Temperature Display between °C / °F
Substantial Insulation for Reduced Heat Loss
12V DC Power Requirement for field use
Opening in Top Lid for Speed Calibration by
Portable Laser Tachometer
This manual provides important information
regarding safety, technical reference, installation
requirements, operating condition specifications,
user facility resource requirements, and operating
instructions for the Portable Oil Test Centrifuge. 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 D96: Standard Test Method for
Water and Sediment in Crude Oil by
Centrifuge Method (Field Procedure)
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: MPMS Chapter 10.4
1.3 Instrument Specifications
Model:
K60094
Electrical
Requirements:
12V DC 40A
Temperature Range:
Ambient to 160°F
(71.1°C)
Temperature
Readout:
Two (2) independent
digital displays for
centrifuge bowl and pre-
heater
Rotor Swing
Diameter:
15.6” (396.24mm)
Speed Range:
300 - 1800 RPM
RCF Range:
20 - 700
Capacity:
Two (2) short cone 6”
tubes
Dimensions:
(w x d x h, in.(cm))
20.79 x 23.43 x 13.91
(with pre-heater lid open)
(52.8 x 59.5 x 35.33)
Net Weight:
50 lbs (22.7 kg)

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -3-
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.
WARNING: KEEP BOWL LID CLOSED
WHILE SAMPLES ARE SPINNING!!!
NEVER try to slow the carousel arm down with
your hands or place your hands or any object
inside the bowl while the carousel arm is
spinning. Allow the carousel arm to come to a
complete stop before removing your sample.
NEVER leave the centrifuge unattended while
the samples are spinning.
NEVER leave the centrifuge unattended while
unit is on.
Ensure lid switch is in locked position prior to
spinning rotor.
Ensure all switches are off when the unit is not
in use.
Be sure there are no foreign objects in the
centrifuge bowl.
Disconnect power supply before removing or
replacing electrical or mechanical parts.
DO NOT leave oily rags or any type of
combustible material in or around your
centrifuge.
DO NOT allow unauthorized persons to access
the centrifuge.
STAY ALERT! Do not operate this unit while
under the influence of medication, alcohol, or
drugs.
Equipment Modifications and Replacement
Parts: Any modification or alteration of this
equipment from that of factory specifications is not
recommended and 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.
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
3.1 Packing List
K60094 Portable Heated Oil Test Centrifuge,
12VDC 40A
Short Cone Centrifuge Tube Holder (2)
Short Cone Centrifuge Tube Cushions (2)
12VDC Cable Cord, 6ft
Support Bracket (2)
K60094-Manual K60094 Portable Oil Test
Centrifuge Operation and Instruction Manual
3.2 Unpacking
Carefully unpack and place the instrument and
accessories in a secure location. Inspect the unit
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

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -4-
return goods to Koehler without written authorization.
3.3 Installation
Equipment Placement: Place the instrument on a
firm surface in a secure area.
The equipment comes with the z-brackets installed
in the factory.
After the unit is mounted, plug the 12VDC cord to the
back of the instrument. See Figure 3 below. Connect
the opposite end of the cord to a power source. The
power source can be either a 12VDC car/truck
battery for field use or a 115/230VAC power supply
adapter for Laboratory use.
Figure 3. Power Connection
3.4 Accessories for Running Tests
6” long, 100mL sample capacity
K61102
Short Tube, marked in 200 parts
every 4 parts above 20mL
K61105
Short Tube, marked in mL
K61107
Short Tube, marked in mL every
2mL above 10mL
K61108
Short Tube, 6", marked in 200
parts
K60002-03058
PTFE cushion for Short Tubes
K61111
Cork Stopper for Long, Short, and
Pear Tube
4 Descriptions
4.1 Portable Oil Test Centrifuge
Figure 3. Portable Oil Test Centrifuge
1. Control Panel. Provides for means to power
on/off and adjustment of the speed and
temperature of the centrifuge. Refer to Section
4.2 for detailed description of the control
panel.
2. Top Opening Lid. Sliding Aluminum Lid
provides access to centrifuge bowl and rotor
assembly for loading samples and cleaning, if
necessary.
WARNING: Never try to slow the carousel arm
down with your hands or place your hands or
any object inside the bowl while the carousel
arm is spinning. Allow the carousel arm to
come to a complete stop before removing your
sample.
3. Tube Holder. Provides for convenient means
of holding two centrifuge tubes while preparing
the sample prior to preheating and testing.
4. Integrated Tube Pre-Heater. For heating of
two centrifuge tubes to test temperature prior
to placing in rotor assembly of centrifuge for
testing.

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -5-
4.2 Control Panel
Figure 4. Control Panel
1. Motor Power. Controls power to the centrifuge
motor. Press switch upward to power on. Press
switch downward to power off.
NOTE: Motor is cooled by direct forced air for
enhanced temperature maintenance during the
test.
2. Motor Speed Dial. Motor dial should be set to
the minimum value (turn counter-clockwise)
while motor power switch is off. After motor
switch is turned on, slowly turn the dial clockwise
to desired speed setting.
NOTE: Indicator markings surrounding the dial
are arbitrary and do not represent a specific set
speed. Speed readings must be made and
confirmed using a portable tachometer that can
read the rotor speed through the small opening
in the Centrifuge Lid.
3. Bowl Heater Power. Controls power to the main
chamber or bowl of the centrifuge. Press switch
to the right to power on. Press switch to the left
to power off.
4. Bowl Temperature Control. For adjusting the
set point temperature of the main chamber or
bowl of the centrifuge. Refer to section 4.3 for
detailed description of the Temperature
Controller.
5. Pre-heater Power. Controls power to the two
preheating chambers. These chambers are the
two right most chambers of the integrated four
place tube holder assembly. Press switch to
the right to power on. Press switch to the left to
power off.
6. Pre-heater Temperature Control. For
adjusting the set point temperature of the two
integrated centrifuge tube preheating
chambers. Refer to section 4.3 for detailed
description of the Temperature Controller.
4.3 Temperature Controller
Figure 5. Temperature Controller
1. Temperature Display. The red LED
display shows the actual temperature as
read from the K Type Thermocouple.
Temperature set point ranges from
ambient to 160°F (71.1°C).
2. Display Message. Shows condition of
temperature controller. Refer to display
messages below.
Output solidly
lit
Heater is “ON”
Display flashing
Probe Error
°C
Temperature is measured
in Celsius °C
°F
Temperature is measured
in Fahrenheit °F
3. Set Key. Acts as a multi-functional action,
advance or enter key. The Set Key is used
in conjuction with the up and down arrow
keys to adjust parameter values,
programming, restoring factory default
settings, etc.

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -6-
4. Down Arrow. Used to decrease the set
point temperature and to decrease or
change parameters when programming
temperature controller.
5. Up Arrow. Used to increase the set point
temperature and to increase or change
parameters when programming temperature
controller.
6. Output. Indicates that the heater is “ON”.
WARNING: 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.
Adjusting the Set Point Temperature. This routine
allows the user to adjust the pre-programmed
set point temperature of the digital temperature
controller.
a. Press Set
b. Use UP ARROW or DOWN ARROW to
adjust value of the temperature parameter
to the required value
c. Press Set again to store the value, this will
be the new set point.
5 Operation
5.1 Power Connection
Plug the provided line cord into the power receptacle
located at the back of the instrument then connect to
properly fused and grounded receptacle 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.
5.2 Test Procedure
1. Switch both the Pre-heater and Bowl Heater
Power Buttons to the ON position. The
temperature displays will flash on and each
unit will begin to heat to the set test
temperature.
2. With the aid of the two left most non-heated
centrifuge tube holders, fill each of two
centrifuge tubes to exactly the 50-mL
(100-part) mark with the test sample.
3. Fill each tube with solvent to exactly the
100-mL (200-part) mark.
NOTE: Read the top of the meniscus at
both the 50-mL and 100-mL (100-part and
200-part) marks
NOTE: If experience indicates that a
demulsifier is required and one has not
already been added to the solvent, add to
each tube quantity of demulsifier solvent
stock solution that has previously been
determined to be satisfactory for the crude
oil under test. Stopper each tube tightly
and invert the tubes a minimum of 10
times to ensure that the oil and solvent are
uniformly mixed.
WARNING: In general, the vapor
pressures of hydrocarbons at 60°C
(140°F) are approximately double those at
40°C (104°F). Consequently, tubes should
always be inverted at a position below eye
level.
NOTE: Where the crude oil is very viscous
and mixing of the solvent with the oil is
difficult, the solvent may be added to the
centrifuge tube prior to the oil to facilitate
mixing. In this case, extreme care must be
taken to fill the centrifuge tube to exactly
the 50-mL (100-part) mark with solvent
and then to exactly the 100-mL (200-part)
mark with the sample.
4. Place stoppers loosely on the centrifuge
tubes to prevent pressure buildup during
heating.
5. Place centrifuge tubes into the two right
most preheated centrifuge tube holders
and heat contents of the tubes to 60°C ±
3°C (140°F ± 5°F).
6. Once the sample temperature reaches
and is stabilized at the desired test
temperature, secure the stoppers and
invert the tubes ten (10) times to ensure
uniform mixing of the oil and solvent.
7. Open the lid and load filled tubes into both
tube holders.
WARNING: Exercise caution when
handling heated samples.

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -7-
Make sure there are cushions at the bottom
of the tube holders and there is no oil
residue or build-up. Always check for and
remove any foreign objects within the bowl.
NOTE: Always balance the rotor by
assuring that two equal samples are
used. Never load unequal samples.
8. Ensure all tubes are properly placed within
their holders and close the lid.
9. Check that the Motor dial is set to the
minimum value (turn counter-clockwise)
before switching on the motor power.
10. Press the Motor Power switch upward to
activate the centrifuge motor.
11. After motor switch is turned on, slowly turn
the motor speed dial clockwise to a speed
setting that produces a RCF of 500. Please
refer to the equation below from ASTM D96
and the rotor diameter referenced in section
1.3 of this document to determine the
appropriate RPM value.
rpm = 1335 √rcf/d (1)
rpm = 265 √rcf/d (2)
where:
rpm = rotational speed, in revolutions per minute
rcf = relative centrifugal force
d = diameter of swing, in mm (eq 1) or in. (eq 2),
measured between the tips of opposite
tubes when the tubes are in their rotationing
position.
12. Spin the sample for at least 5 minutes.
13. After 5 minute test time is complete turn off
motor power.
14. Immediately after the centrifuge comes to
rest, verify the temperature. Do not disturb
the oil-water interface with the thermometer.
The test is invalid if the final temperature
after centrifugation is below 52°C (125°F).
NOTE: If the final temperature is found to be
below 52°C (125°F), adjust the centrifuge
heater to increase the final test temperature
and reinitiate the procedure, beginning with
Step 4.
15. Read and record the combined volume of
sediment and water at the bottom of each
tube.
WARNING: Exercise caution when
handling heated samples.
16. Reheat both tubes to 60°C ± 3°C (140°F ±
5°F), return the tubes without agitation to
the centrifuge, and spin for another 5
minutes at the same speed rate. Repeat
this operation until two consecutive
consistent readings are obtained on each
tube.
17. For the test to be considered valid, a clear
interface must be observed between the
oil layer and the separated water. No
identifiable layering (that is, an emulsion)
should be present immediately above the
oil-water interface. In such cases, one or
more of the following remedies may be
effective:
i. Shake the mixture between whirlings
in the centrifuge just enough to
disperse the emulsion
ii. Use a different or an increased
amount of demulsifier. (The
demulsifier should not, however,
contribute to the volume of sediment
and water.)
iii. Use a different or an increased
amount of solvent. After a satisfactory
procedure for a particular type of oil
has been worked out, it will ordinarily
be suitable for all samples of the same
crude oil.

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -8-
6 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.
6.1 Routine Maintenance
Clean the unit after each test. Build-up of oil
residues can cause problems with the
operation and efficiency of the centrifuge.
Periodically, check the sample tube cushion
inside the carousel shields. Replace if worn
excessively.
ALWAYS check moving parts, both
mechanical and electrical, for wear and stress.
Replace if necessary.
6.2 Replacement Parts
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).
Part Number
Description
K60094-23014
Rotor Assembly
K60002-03043
Short Tube Holder
K60002-03058
Short Tube PTFE Cushion
230-012-001
Band Heater, 140W,
12VDC
275-600-011
Digital Temperature
Controller, 12-24V
265-000-007
Thermocouple, Type K
090-012-003
Relay, 40A, 12VDC SPST
278-002-001
Fuse, 2A
278-020-001
Fuse, 20A
288-012-003
Motor, 12VDC

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -9-
7 Wiring Diagram

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -10-
8 Troubleshooting
8.1 The test will not start
Contact Koehler’s Technical Service
Department.
8.2 The motor stalls or will not come up to
speed properly
Check whether the motor power switch
shown in section 4.2 is blinking. This
indicates over current on the motor. Switch
the power off to the instrument and check to
see if there is something restricting the
rotation of the carousel in the bowl.
Check Fuses
8.3 The unit does not heat up
Ensure the heater is powered on.
Check fuses
9 Service
Under normal operating conditions and with
routine maintenance, the K60094 Portable Heated
Oil Test Centrifuge should not require service. Any
service problem can be quickly resolved by
contacting Koehler’s technical service department
either by letter, phone, fax, or email. In order to
assure the fastest possible service, please provide
us with the following information.
Model Number:
Serial Number:
Date of Shipment:
10 Storage
This laboratory test instrument is equipped with
electrical components. Storage facilities should be
consistent with an indoor laboratory environment.
This testing equipment should not be subjected to
extremes of temperature and/or moisture.
This equipment was shipped from the factory in a
corrugated cardboard container. If long term
storage is anticipated, re-packing the instrument in
a water-resistant container is recommended to
ensure equipment safety and longevity.
11 Warranty
We at Koehler would like to thank you for your
equipment purchase, which is protected by the
following warranty. If within one (1) year from the
date of receipt, but no longer than fifteen (15)
months from the date of shipment, Koehler
equipment fails to perform properly because of
defects in materials or workmanship, Koehler
Instrument Company, Inc. will repair or, at its sole
discretion, replace the equipment without charge
F.O.B. its plant, provided the equipment has been
properly installed, operated, and maintained.
Koehler Instrument Company must be advised in
writing of the malfunction and authorize the return
of the product to the factory. The sole responsibility
of Koehler Instrument Company and the
purchaser’s exclusive remedy for any claim arising
out of the purchase of any product is the repair or
replacement of the product. In no event shall the
cost of the purchaser’s remedy exceed the
purchase price, nor shall Koehler Instrument
Company be liable for any special, indirect,
incidental, consequential, or exemplary damages.
KOEHLER INSTRUMENT COMPANY, INC.
DISCLAIMS ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTIES OF FITNESS FOR A
PARTICULAR PURPOSE. Please save the
shipping carton in the event the equipment needs to
be returned to the factory for warranty repair. If the
carton is discarded, it will be the purchaser’s
responsibility to provide an appropriate shipping
carton.
12 Returned Goods Policy
To return products for credit or replacement, please
contact Koehler Customer Service with your
purchase order number, our packing list/invoice
number, the item(s) to be returned and the reason
for the return. You will be issued a Returned
Authorization (RA) number, which must be
prominently displayed on the shipping container
when you return the material to our plant. Shipping
containers without an RA number prominently
displayed with be returned to the sender. Goods
must be returned freight prepaid. Returns will be
subject to a restocking charge, the application of
which will depend upon the circumstances
necessitating the return. Some returns cannot be
authorized, including certain products purchased
from outside vendors for the convenience of the
customer, products manufactured on special order,
products shipped from the factory past ninety (90)
days, and products which have been used or
modified in such a way that they cannot be returned
to stock for future sale.

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -11-
Notes

K60094 Portable Heated Oil Test Centrifuge
Operation and Technical Manual
K60094-Manual -12-
Notes