Koehler K271 Series 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
K271XX
Ramsbottom Carbon Residue
Apparatus

CERTIFICATE OF CONFORMANCE
Ramsbottom Carbon Residue Apparatus
K271XX
This certificate verifies that part number K271XX, Ramsbottom Carbon
Residue Apparatus, was manufactured in conformance with the applicable
standards set forth in this certification.
Specifications: ASTM D524
ASTM D3074
IP 14
ISO 4262
FTM 791-5002
NF T 60-117
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

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.
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).

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K27190-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
1.4 Software Specifications............................................................................3
2Safety Information and Warnings......................................................3
3Unpacking & Installation ....................................................................3
3.1 Packing List .............................................................................................3
3.2 Unpacking................................................................................................3
3.3 Instrument Installation..............................................................................4
3.4 Software Installation.................................................................................5
4Operation.............................................................................................5
4.1Instrument Descriptions ...........................................................................5
4.2 Instrument Operation...............................................................................5
4.3 Temperature Controller............................................................................6
5Safety Features ...................................................................................7
5.1 Over Temperature Protection...................................................................7
5.2 Over Power Protection.............................................................................8
6Maintenance ........................................................................................8
6.1 Routine Maintenance...............................................................................8
6.2 Replacement Parts ..................................................................................8
7Service .................................................................................................8
8Storage.................................................................................................9
9Warranty...............................................................................................9
10 Returned Goods Policy.......................................................................9

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 2
1 Introduction
The Koehler Ramsbottom Carbon Residue
Tester and Data Acquisition Software is the
latest design for performing the ASTM D524 test
method and related test specifications. The
tester determines the ‘carbon residue’ left after
evaporation and pyrolysis of a sample oil in the
Ramsbottom furnace, providing an indication of
the deposit forming tendencies of fuels and
guidelines for the processing of refinery
products.
This manual provides important information
regarding safety, technical reference, installation
requirements, operating condition specifications,
user facility resource requirements, and
operating instructions for the Ramsbottom
Carbon Residue Tester 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]
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 D524
ASTM D6074
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 14
3. Association Française de Normalisation
(AFNOR)
http://www.afnor.fr
AFNOR Publication:
NF T 60-117
4. Federal Test Method
FTM Publication:
FTM 791-5002
1.3 Instrument Specifications
Models:
K27100
K27190
Electrical
Requirements:
115V 60Hz, 20.8A
230V 50Hz, 10.9A
Temperature
Range:
Ambient to 650 °C (1200°F)
Dimensions:
(l x w xh)
16x21.5x14.5 (41x55x37)
Shipping Weight:
78 lbs (35kg)
Net Weight:
64lbs (29 kg)

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 3
1.4 Software Specifications
PC System
Requirements:
Intel Pentium III Processor
or similar (minimum)
Operating System:
Windows 98/XP
Memory
Requirements:
32 Mb RAM (64 Mb RAM
recommended)
5 Mb hard disk
space(minimum)
Communication
Ports:
RS-232 (serial)
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.
Unit Design. This equipment is specifically
designed for use in accordance with the
applicable standard test methods listed in
section 1.2 of the operator’s 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.
Overtemperature Protection. This unit is
equipped with Overtemperature Protection
(OTP) circuitry to prevent overheating. The unit
will automatically interrupt power whether
equipment malfunction or operator error causes
the temperature to exceed 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 Unpacking & Installation
The instruction for preparing this equipment
assumes that the user is aware of the contents
of this document, which lists the warranty
conditions and important precautions.
3.1 Packing List
K27100/K27190 Ramsbottom Carbon
Residue Apparatus 115V 60Hz or 230V
50/60Hz
Carbon Residue Apparatus Operation and
Instruction Manual
Accessories (must be purchased separately)
332-007-001 Coking Bulb
K27320 Coking Bulb Filling Device
362-010-001 Sample Charging Syringe,
10mL
382-018-001 Syringe Needle, 18 gauge, 2”
K27200 Control Bulb
K29310/K29319 Digital Thermometer
K271X0-SFW Ramsbottom Carbon Residue
Software and Communication Port Cable
K885-120-2 Analytical Balance, 120g
capacity
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.

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 4
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 Figure below.
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 Instrument Installation
Equipment Placement: Place the main unit on
a firm, level surface in an area with adequate
ventilation or in a hood. Do not place any
fixtures or shelves located directly above the
unit. Leave approximately one foot of free space
around each side of the unit because it
generates an enormous amount of heat.
Ventilation: A fume hood or exhaust system is
required when operating the Ramsbottom
Carbon Residue Apparatus. Fumes and
hydrocarbon vapors are generated 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.
WARNING: For user safety, please keep
any combustible materials away from the
proximity of the unit.
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%
Power: Connect the line cords to properly fused
and grounded receptacles with the correct
voltage as indicated in section 1.3 or on the
information plate at the back of the individual
units. The 115V model (K27100) uses a NEMA
L5-30 plug and the 230V model (K27190) uses a
NEMA L6-15 plug.
WARNING: For user safety, please
disconnect the line cord whenever performing
any maintenance and/or cleaning of the unit.
Also, check that the power switch is in the off
position before connecting the line cord at any
time.
Coking Bulb Filling Device: The K27320
Coking Bulb Filling Device is a convenient time
saving device that fills up to five coking bulbs at
a time. It is ideal for viscous fluids that are
difficult to handle at room temperature. The base
of the device is pre-drilled with holes so that it
can be secured to a benchtop or other suitable
surface.
Digital Thermometer and Control Bulb. The
K27200 Control Bulb is a stainless steel bulb
with a built-in IC thermocouple that may be used
to verify compliance of the furnace with ASTM
performance requirements. The thermocouple
leads may be secured to the inputs located on
the rear of the K29310/K29319 Digital
Thermometer. For example: if the leads are
connected to channel 1 inputs, then select
channel 1 on the dial located on the front of the

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 5
Digital Thermometer to observe the current
temperature reading of the thermocouple. Make
sure to connect the line cord and turn on the
power to the Digital Thermometer for proper
operation. If the temperature display on the
Digital Thermometer increases in the negative
direction when the thermocouple is exposed to
heat, then reverse the positive and negative
thermocouple lead inputs on the rear of the
Digital Thermometer for correct operation.
Analytical Balance. An analytical balance is
required for conducting this test and can be
supplied by Koehler if needed. Place the
balance on a firm, level surface. The Koehler
balance may be leveled by making minor turning
adjustments to the feet located at the base of
the unit. A spirit level is included with the
balance. Connect the balance main power
supply to the appropriate power source. To
unlock the clamping screw used for shipping,
locate the black knob on the front center of the
balance and underneath the display area. Turn
the knob counter-clockwise until resistance is
felt. Turn the unit power on and zero the balance
reading. Refer to the separate user manual of
the analytical balance for full operational details.
Communication Port Cables. Using the
Communication Port Cable supplied for the
Ramsbottom Carbon Residue Tester, connect
the RS-232 port located on the unit to a
communication port on the PC.
3.4 Software Installation
Insert the CD-ROM into the CD tray of the PC.
The CD should automatically display the setup
screen. If this does not happen within 10
seconds, then browse the files on the CD-ROM
and double click on the setup file (setup.exe) to
start the installation. Follow the instructions on
the screen to setup the software. Once the
installation has been completed and the PC has
been restarted, then you are ready to run the
software.
4 Operation
The Koehler Ramsbottom Carbon Residue
Apparatus is designed for acquiring test data in
accordance with the ASTM D524 and related
test procedures. Please be sure to read the
safety and hazard warnings, the installation
procedure, and the standard test method before
operating this software and instrument.
WARNING: There are exposed hot
surfaces on the bath during operation. Please
avoid contact with exposed skin by the use of
required protective equipment or serious injury
could occur.
4.1 Instrument Descriptions
Power Switch. This switch controls the power to
the entire unit. When the power switch is in the
ON position, the digital temperature display and
digital control panel are on and illuminated.
Temperature Controller. The digital
temperature controller as shown in Figure 1
provides full temperature control of the
apparatus.
4.2 Instrument Operation
1. Power. Turn on the main power switch to
the Ramsbottom Carbon Residue Tester.
2. Settings. Set the digital temperature
controller as prescribed by the test method.
Full details of the digital temperature
controller operation can be found in section
4.3. Note: The unit will take approximately
1-2 hours to heat and equilibrate the sample
chamber to 550 °C.
3. Calibration.
a. Digital Temperature Controller. Once
the unit has stabilized at the set
temperature, the temperature of each of
the test wells can be measured and
used to calibrate the digital temperature
controller. Use the K27200 Control Bulb
connected to the K29310 / K29319
Digital Thermometer to measure this
temperature. Allow the temperature
reading on the digital thermometer to
come to equilibrium before adjusting the
calibration setting in the digital
temperature controller. Full details

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 6
setting the calibration in the digital
temperature controller are given in
section 4.3.
b. Ramsbottom Carbon Residue Tester.
The ASTM D524 test method describes
the procedure to verify the compliance
of the furnace with the ASTM
performance requirements and is
summarized as follows. Insert the
control bulb into a sample well. Observe
the temperature rise in the control bulb
in 1 minute intervals for 20 minutes. If
the temperature in the control bulb
reaches 547 °C in not less than 4
minutes and not more than 6 minutes
from the instant of its insertion in the
furnace and remains within the range
550 ± 3 °C for the remaining portion of
the 20 minute test, then consider that
particular coking bulb well is suitable for
use as a standard performance well.
Allow the control bulb to return to room
temperature before inspecting the next
well.
4. Charging the Coking Bulbs. Please
consult with the appropriate test method
regarding charging the coking bulbs with the
test sample. The two steps below however
provide a brief outline.
a. Direct Method. Attach a syringe needle
to the syringe tip and insert the plunger
into the syringe body. Insert the needle
into the material to be tested and fill up
the syringe by pulling back on the
plunger. Insert the needle through the
top orifice in the coking bulb and add the
necessary amount of material.
b. Coking Bulb Filling Device. The
K27320 Coking Bulb Filling Device is a
device that fills up to five coking bulbs at
a time and can be used for viscous
fluids that are difficult to handle at room
temperature. Place up to 5 coking bulbs
in each of the wells in the base of the
K27320 Coking Bulb Filling Device.
Take a syringe equipped with a needle
and pull out the plunger. Place the
syringe body and needle on the top
support of the filling device by inserting
the needle through the top holes all the
way down through the orifice of the
coking bulb. Pour in the required
amount of test sample into the syringe
and then reinsert the plunger. Pull the
spring-loaded cap over the top of the
plunger and carefully set it down on the
plunger. The force of the springs will fill
the coking bulb.
5. Running the Test. Place the filled coking
bulb into a well for a specific time period.
After the sample has been heated, carefully
remove the coking bulb from the sample well
using tongs. Weigh the coking bulb to
determine the amount of residue.
WARNING: There are exposed hot surfaces
on the bath during operation. Please avoid
contact with exposed skin by the use of
required protective equipment or serious
injury could occur.
4.3 Temperature Controller
Figure 1. Digital 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.

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 7
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.
5 Safety Features
The Koehler Ramsbottom Carbon Residue
Tester is equipped with several safety and
protection features, which are described in the
following sections.
5.1 Over Temperature Protection
The Koehler Ramsbottom Carbon Residue
Tester 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

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 8
properly. If you are still experiencing
trouble, please contact Koehler
technical service for assistance.
5.2 Over Power Protection
The Koehler Ramsbottom Carbon Residue
Tester 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.
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
The Koehler Ramsbottom Carbon Residue
Tester requires little routine maintenance to
provide many years of continuous service.
1. Calibration Procedure. The ASTM D524
test method describes the procedure to
verify the compliance of the furnace with the
ASTM performance requirements and is
summarized as follows. Insert the control
bulb into a sample well. Observe the
temperature rise in the control bulb in 1
minute intervals for 20 minutes. If the
temperature in the control bulb reaches 547
°C in not less than 4 minutes and not more
than 6 minutes from the instant of its
insertion in the furnace and remains within
the range 550 ± 3 °C for the remaining
portion of the 20 minute test, then consider
that particular coking bulb well suitable for
use as a standard performance well. Allow
the control bulb to return to room
temperature before inspecting the next well.
2. Test Well Cleaning Procedure. It is
imperative that the test wells of this unit be
kept clean and free of any foreign mater.
Failure to do so may result in the coking
bulbs becoming stuck within the unit. While
the unit is at room temperature, use
compressed air to blow any loose matter out
of the test wells and off the top of the unit.
Wipe out the interior with a damp cloth and a
suitable cleaning solution. Wipe the test
wells until no residue is present on the cloth.
3. Control Bulb Maintenance. The control
bulb should be kept clean using a cleaning
solution on the exterior face. Abrasive
cleansers or pads should not be used on the
control bulbs. In the event the control bulb
becomes stuck in a test well, the bath
should be cooled to room temperature
before removal is attempted. Please contact
our Technical Services Department for
assistance regarding this matter.
6.2 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
230-115-001
Heater, 2400W†
265-203-001
Temperature Probe, Type K
278-203-002
Fuse, 30A†
278-001-002
Fuse, 1A
278-104-002
Fuse, 0.25A
275-103-044
Temperature Controller, 100-240V
230-230-002
Heater, 2400W‡
278-020-004
Fuse, 20A
091-032-001
Solid State Relay, 4-32VDC, 20A‡
†For 115V model ONLY (K27100)
‡For 230V model ONLY (K27190)
7 Service
Under normal operating conditions and with
routine maintenance, the Koehler Ramsbottom
Carbon Residue Tester 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:

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 9
8 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.
9 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.
10 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 will 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.
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.

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 10
Notes

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 11
Notes

K27190 Ramsbottom Carbon Residue
Operation and Instruction Manual
K271XX-Manual 12
Notes