Koehler KV5000 Guide

Operation and Instruction Manual
REV E
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
KV5000
Kinematic Viscosity Bath
with Optical Detection System

CERTIFICATE OF CONFORMANCE
Constant Temperature Kinematic Viscosity Bath, KV5000
K237XX-OS
This certificate verifies that part number K237XX-OS, Constant Temperature
Kinematic Viscosity Bath, was manufactured in conformance with the applicable
standards set forth in this certification.
Specifications: ASTM D445
ASTM D2532
ASTM D6074
ASTM D6158
IP 71
ISO 3104
DIN 51550
FTM 791-305
NF T 60-100
This unit is tested before it leaves the factory, to ensure total functionality and
compliance to the above specifications and ASTM standards. Test and inspection
records are on file for verification.
Jesse Kelly
Application Engineer
Koehler Instrument Company

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

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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).

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Table of Contents
1Introduction ...................................................................................................................7
1.1 Koehler’s Commitment to Our Customers .............................................................................................7
1.2 Recommended Resources and Publications.........................................................................................7
1.3 Instrument Specifications.......................................................................................................................8
2Safety Information and Warnings ................................................................................8
3Getting Started...............................................................................................................9
3.1 Packing List............................................................................................................................................9
3.2 Unpacking ..............................................................................................................................................9
3.3 Setup....................................................................................................................................................10
4Descriptions.................................................................................................................11
4.1 Instrument Controls..............................................................................................................................11
4.2 Accessories for Running Tests ............................................................................................................11
4.3 Temperature Controller Operation.......................................................................................................13
4.4 Recommended Accessories ................................................................................................................14
5Operation .....................................................................................................................14
5.1 Bath......................................................................................................................................................14
5.2 Power ...................................................................................................................................................15
5.3 Engage the Viscometer in Optical Sensor Assembly...........................................................................15
5.4 Adjusting the Sensors ..........................................................................................................................17
5.5 Control Panel Operation.......................................................................................................................18
5.6 Test Procedure.....................................................................................................................................19
6Safety Features............................................................................................................21
6.1 Over-Temperature Protection ..............................................................................................................21
6.2 Over-Power Protection.........................................................................................................................21
7Troubleshooting..........................................................................................................21
7.1 The unit does not power up..................................................................................................................21
7.2 The unit is an and keeps resetting into start up routine.......................................................................21
7.3 The unit is on but the bath does not heat up........................................................................................21
7.4 The bath heats up but does not stabilize .............................................................................................21
8Maintenance.................................................................................................................21
8.1 Routine Maintenance ...........................................................................................................................21
8.2 Bath Cleaning.......................................................................................................................................22
8.3 Draining / Changing Bath Medium.......................................................................................................22
8.4 Changing Bath Lamp / Bulb.................................................................................................................23
8.5 Replacement Parts...............................................................................................................................24
9Wiring Diagrams..........................................................................................................25
9.1 Unit Wiring............................................................................................................................................25
9.2 Amplifier Wiring....................................................................................................................................26

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10 Service..........................................................................................................................27
11 Storage.........................................................................................................................27
12 Warranty.......................................................................................................................27
13 Returned Goods Policy...............................................................................................27
Notes..................................................................................................................................28

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1 Introduction
The Koehler KV5000 Kinematic Viscosity
Instrument and Data Acquisition Software is the
latest design for performing kinematic viscosity
tests with glass capillary viscometers according to
the ASTM D445 test method and related test
specifications.
This manual provides important information
regarding safety, technical reference, installation
requirements, operating condition specifications,
user facility resource requirements, and operating
instructions for the Kinematic Viscosity 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]
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 D445: Kinematic Viscosity of
Transparent and Opaque Liquids (and the
Calculation of Dynamic Viscosity)
ASTM D2170: Kinematic Viscosity of
Asphalts (Bitumens)
ASTM D6074: Standard Guide for
Characterizing Hydrocarbon Lubricant
Base Oils
ASTM D6158: Standard Specification for
Mineral Hydraulic Oils
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 3104: Petroleum products –
Transparent and opaque liquids –
Determination of kinematic viscosity and
calculation of dynamic viscosity
3. Energy Institute (IP)
61 New Cavendish Street
London, WIM 8AR, United Kingdom
Tel: [phone]
Fax: [phone]
http://www.energyinstpubs.org.uk/
IP Publication:
IP 71: Kinematic viscosity and calculation
of dynamic viscosity
IP 319: Kinematic viscosity of bitumens
4. Deutsche International Norm (DIN)
http://www.din.de
DIN Publication:

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DIN 51550: Determination of Kinematic
Viscosity and Dynamic Viscosity
5. Federal Test Method (FTM)
FTM Publication:
FTM 791-305: Kinematic Viscosity of
Petroleum Products
6. Association Française de Normalisation
(AFNOR)
http://www.afnor.fr
AFNOR Publication:
NF T 60-100: Kinematic Viscosity of
Petroleum Products
1.3 Instrument Specifications
Models:
K23702-OS, K23708-OS,
K23792-OS, K23798-OS
Electrical
Requirements:
115V 60Hz
220V 50/60Hz
Temperature Range:
Ambient to 150°C
(302°F)
Optional Temperature
Range:
-20° to 150°C
(-4° to 302°F)
(Requires an optional
external chiller)
Temperature Control
Stability:
Exceeds ASTM
requirements
Viscometer Ports:
Seven (7) round 2”
(51mm) ports
Capacity:
Five (5) optical sensors
Bath Medium:
Water or suitable heat
transfer fluid
Bath Medium
Capacity:
22L (5.8 gal) or 34L (8.9
gal)
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 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.

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3 Getting Started
The instructions for preparing the equipment
assume that the user is aware of the contents of
this document, which lists the warranty conditions
and important precautions.
3.1 Packing List
KV5000 Kinematic Viscosity Instrument
K23702OS-03040 Reflector
K23702OS-03038 Reflector Holder (2)
K23700-02002 Port Cover Assembly (7)
KV5000-Manual KV5000 Kinematic Viscosity
Instrument with Optical Detection System
Operation and Instruction Manual
Accessories (purchased separately, see Section
4.2 for more information):
K23780-CF Optical Sensor for Cannon®-Fenske
viscometers
K23780-RF Optical Sensor for Reverse Flow
viscometers
K23780-UB Optical Sensor for Ubbelohde
viscometers
3.2 Unpacking
1. Check Shock Watch Label on Cardboard Box
for indication of rough handling and possible
damage.
2. Check labeling for correct orientation of
instrument. (e.g. This Side Up)
3. Carefully open top of box with box cutter and
remove packing foam.
4. Look inside bath from top of box, to verify that
the Glass Bath Jar is in tact.
5. Make two additional vertical cuts, using box
cutter, along length of two sides of the box
and remove packing foam.
6. Extract instrument and place on suitable cart
for transportation to work area / lab bench.
WARNING: Be sure two or more individuals
are available for extracting and lifting instrument
from box to cart and from cart to bench.
Individuals must lift in accordance to proper
technique. See Figure below.
7. Lift instrument from cart and place on bench.
8. Remove foam insert Borosilicate Glass Jar as
per steps 9 thru 19.
9. Using a flat head screwdriver, remove the four
(4) silver screws located at the four corners of
the back panel.
10. Remove the back panel plate and set aside.
11. A collection of wires runs from the lower
control panel up the left side, while looking at
the back of the bath. Halfway up the wiring are
three points where the wires can be
disconnected. See Figure below:
12. There are a total of three joints to disconnect.
First disconnect the single large cluster of
wires by pressing in the sides of the lower
plastic piece then pulling the top plastic piece.
13. Then disconnect the two smaller joints. Each
side of the joint is labeled with an identical
number one (1) or number two (2). This
makes for easy connection when re-
assembling the instrument.
14. Once the wiring is completely disassembled it
is safe to remove the top assembly of the
bath.
15. Remove the six (6) screws lining the two sides
of the top assembly with a Philips head screw
driver.

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16. Make sure there is sufficient space with
cleaning clothes to place the top assembly
when lifted off the bath.
17. Lift the top assembly with one hand on the
back side and one hand on the front side of
the top assembly. Place top plate assembly on
flat surface with the back side of the top plate
assembly and the heating coils on the surface.
18. With the top plate assembly now removed
from the main instrument it is now easy to
access the bath jar to remove the protective
foam insert.
19. Re-assemble the instrument
20. Ensure that all parts listed on the packing list
are present. Inspect the unit and all
accessories for damage. If any damage is
found, keep all packing materials and
immediately report the damage to the carrier.
We will assist you with your claim, if
requested. When submitting a claim for
shipping damage, request that the carrier
inspect the shipping container and equipment.
Do not return goods to Koehler without written
authorization.
3.3 Setup
Equipment Placement. Place the instrument 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: Certain mechanical stresses
applied to the tempered glass front panel and
inner the inner borosilicate glass 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.

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4 Descriptions
4.1 Instrument Controls
Figure 3: 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, the stirrer, and the optical sensors
power supply are powered on.
2. Lamp Switch. This switch controls turning
ON/OFF the lamp for illuminating the test
samples.
3. Temperature Controller. The temperature
controller regulates the bath temperature for
the test procedure. Refer to Section 4.3 for full
operational details.
4. Bath/ Bath Stirrer: The stirrer constantly
circulates bath medium to prevent
temperature gradients and ensures
temperature stability. When cleaning and/or
servicing, please be sure to disconnect unit
power to avoid possible injury.
5. Temperature Regulation: The heater coils
stabilize the bath temperature to desired
setting within ± 0.02°C. Running coolant
through the cooling coils allows bath to
maintain temperatures near or below ambient.
6. Viscometer Ports: The viscometer, once
engaged into the assembly, is placed into the
bath through the viscometer ports on top of
the instrument.
7. Thermometer/Thermocouple Port: This port
allows for independent temperature
measurement of the bath temperature with a
thermometer or a Pt-100 RTD probe for
precise temperature measurements and digital
temperature controller calibration. If the
controller needs to be calibrated, then please
contact the Koehler technical service
department.
8. Optical Sensor Ports: The optical sensors
are connected to the instrument through these
ports numbered 1-5. Note that an outline of
the plug is provided to ensure that the plug is
inserted into the proper position.
9. Interface: Here the user can set operation
parameters and view results on the touch
screen digital display.
4.2 Accessories for Running Tests
Glass Capillary Viscometer Tubes for KV5000
Koehler offers a full selection of glass capillary
kinematic viscometers, which are ordered
separately from the KV5000 instrument, for
measuring kinematic viscosity of liquid products as
per ASTM D445 and related standard test
methods. All types of viscometers conform to
ASTM D445 and related methods for glass
capillary kinematic viscometers. All viscometers
with part numbers for the automatic test are listed
below. The constant for each individual viscometer
is written on the Certificate of Calibration, included
in the packaging.
IMPORTANT: It is recommended when using a
new viscometer for the first time to run a test with
suitable standard. Different locations may result in
a slightly different constant.

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Cannon®-Fenske Routine Viscometers
The Cannon®-Fenske Routine viscometer is a
rugged and inexpensive viscometer that works
well if the sample is transparent or translucent.
For kinematic viscosity of transparent liquids
up to 20,000cSt.
Requires a sample of approximately 7mL.
Use with K23780-CF Optical Detection
Assembly on the KV5000 viscosity bath.
Cannon®-Fenske Opaque Reverse Flow
Viscometers
The reverse flow viscometers are designed for
testing opaque liquids. These viscometers wet the
timing section of the viscometer capillary only
during the actual measurement and must be
cleaned, dried and refilled before a repeat
measurement can be made. By contrast, other
viscometer types commonly used to measure
transparent liquids allow the sample to be
repeatedly drawn up into the capillary, permitting
duplicate measurements.
For measurement of transparent and dark
liquids having kinematic viscosities of up to
20,000cSt
Requires a sample of approx 12mL.
Can be used for viscosities of asphalts by
ASTM D2170 method.
Use with K23780-RF Optical Detection
Assembly on the KV5000 viscosity bath.
Catalog No.
Size
Approximate
Constant,
cSt/s
Kinematic
Viscosity Range,
cSt
378-025-C02-OS
25
0.002
0.4 to 2
378-050-C02-OS
50
0.004
0.8 to 4
378-075-C02-OS
75
0.008
1.6 to 8
378-100-C02-OS
100
0.015
3 to 15
378-150-C02-OS
150
0.035
7 to 35
378-200-C02-OS
200
0.1
20 to 100
378-300-C02-OS
300
0.25
50 to 250
378-350-C02-OS
350
0.5
100 to 500
378-400-C02-OS
400
1.2
240 to 1,200
378-450-C02-OS
450
2.5
500 to 2,500
378-500-C02-OS
500
8
1,600 to 8,000
378-600-C02-OS
600
20
4,000 to 20,000
378-650-C02-OS
650
45
9,000 to 45,000
378-700-C02-OS
700
100
20,000 to 100,000
Ubbelohde Viscometers
Ubbelohde viscometers measure transparent
liquids, and unlike the Cannon®-Fenske Routine
viscometers, they maintain the same viscometer
constant at all temperatures. This is advantageous
when samples are to be measured at different
temperatures.
Suspended-level type viscometers are for
transparent liquids of up to 100,000cSt
Requires a sample volume of approx 11mL.
Use with K23780-UB Optical Detection
Assembly on the KV5000 viscosity bath.
Catalog No.
Size
Approx.
Constant,
cSt/s
Kinematic
Viscosity Range,
cSt
378-000-C03-OS
0
0.001
0.3 to 1
378-00C-C03-OS
0C
0.003
0.6 to 3
378-00B-C03-OS
0B
0.005
1 to 5
378-001-C03-OS
1
0.01
2 to 10
378-01C-C03-OS
1C
0.03
6 to 30
378-01B-C03-OS
1B
0.05
10 to 50
378-002-C03-OS
2
0.1
20 to 100
378-02C-C03-OS
2C
0.3
60 to 300
378-02B-C03-OS
2B
0.5
100 to 500
378-003-C03-OS
3
1
200 to 1,000
378-03C-C03-OS
3C
3
600 to 3,000
378-03B-C03-OS
3B
5
1,000 to 5,000
378-004-C03-OS
4
10
2,000 to 10,000
378-04C-C03-OS
4C
30
6,000 to 30,000
378-04B-C03-OS
4B
50
10,000 to 50,000
378-005-C03-OS
5
100
20,000 to
100,000
Catalog No.
Size
Approximate
Constant,
cSt/s
Kinematic
Viscosity Range,
cSt
378-025-C01-OS
25
0.002
0.5 to 2
378-050-C01-OS
50
0.004
0.8 to 4
378-075-C01-OS
75
0.008
1.6 to 8
378-100-C01-OS
100
0.015
3 to 15
378-150-C01-OS
150
0.035
7 to 35
378-200-C01-OS
200
0.1
20 to 100
378-300-C01-OS
300
0.25
50 to 250
378-350-C01-OS
350
0.5
100 to 500
378-400-C01-OS
400
1.2
240 to 1,200
378-450-C01-OS
450
2.5
500 to 2,500
378-500-C01-OS
500
8
1,600 to 8,000
378-600-C01-OS
600
20
4,000 to 20,000
378-650-C01-OS
650
45
9,000 to 45,000
378-700-C01-OS
700
100
20,000 to 100,000

KV5000 Instrument & Software
Operation and Instruction Manual
KV5000-Manual -13-
Optical Sensor Assemblies
The optical sensor assemblies function to hold
the glass viscometer tube in place in the viscosity
bath and automatically measure the kinematic
viscosity of a sample when the sample fluid is
flowing through the viscometer tube. The sensors
are powered by the unit and just need to be
plugged into their corresponding port.
The optical sensors can be used with Cannon®-
Fenske Routine, Reverse Flow, and Ubbelohde
type glass capillary viscometers. Do NOT use
standard viscometer tubes with the optical
sensors. The viscometer tubes listed above are of
higher quality and tighter specifications designed
to provide the most accurate results with the
optical sensors.
The correct optical sensor must be used
with the corresponding viscometer tube for proper
operation:
Viscometer Tube Type
Corresponding
Optical sensor
Cannon®-Fenske Routine
K23780-CF
Reverse Flow
K23780-RF
Ubbelohde
K23780-UB
Viscometer Holders
To perform viscosity measurements without the
Optical Sensor in Manual Mode, Koehler offers
viscometer holders for use with the KV-5000. The
correct holder must be used with the
corresponding viscometer tube for proper
operation:
Viscometer Tube Type
Corresponding
Holder
Cannon®-Fenske Routine
K23381
Reverse Flow
K23383
Ubbelohde
K23382
4.3 Temperature Controller Operation
Figure 4. Temperature Controller
1. Process Temperature Display. The
upper red LED display shows the process
temperature as read from the RTD probe.
2. Set Point Temperature Display. The
lower green LED display shows the set
point temperature of the controller.
3. Programming Key. Permits scrolling
through controller menu parameters. One
Level Forward
4. Down Key. Used to decrease the set
point temperature and to decrease or
change parameter values when
programming the temperature controller.
5. Up Key. Used to increase the set point
temperature and to increase or change
parameter values when programming the
temperature controller.
6. Exit / Function Key. This key is used to
exit or leave a level. One level backward
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.

KV5000 Instrument & Software
Operation and Instruction Manual
KV5000-Manual -14-
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. In the calibration
mode, the display will always give 2 decimal
places.
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.
4.4 Recommended Accessories
Withdrawal Bulb. Use to pull sample into
viscometer tube.
Part number: K22090
Rubber Stopper. Use to plug viscometer
tube and hold up sample prior to testing.
Part number: K23311
Operation near or below ambient
temperatures. A water supply or external
chiller may be used to maintain the
temperature of the bath for cooler
temperature. Hose-barb connections for
water or refrigerated coolant are located at
the top of the bath. There are two
connections: inlet and outlet. The hose
connections can be secured with copper
wire to prevent the tubing from disengaging
from the connection.
5 Operation
This unit is designed for performing kinematic
viscosity tests using glass capillary viscometers.
Please be sure to read the safety and hazard
warnings, the installation procedure, and any of
the standard test methods before operating this
instrument.
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.

KV5000 Instrument & Software
Operation and Instruction Manual
KV5000-Manual -15-
NOTE: Do not attempt moving the bath
when filled with fluid medium. Drain all fluid before
moving or relocating the instrument. See section
7.2 of this document. Sudden starting and
stopping could result in hot bath fluid being
forcefully ejected from the bath. It could also result
in overbalancing and tipping over the instrument.
NOTE: Do not drain the bath until the fluid is at
ambient temperature.
Testing
Temperature
Recommended Fluid
15 - 50°C*
Distilled water will be suitable.
50 - 95°C
Koehler supplies highly
refined white technical oil
(part # 355-001-001) that
contains an oxidation inhibitor
to limit clouding at higher
temperatures.
CAS# 8042-47-5
Minimum Flash Point: 120°C
(248°F)
Fire Point: 202°C (395°F)
95 - 150°C
Koehler supplies a clear
silicone heat transfer fluid
(part # 355-001-002) with high
oxidation resistance and low
volatility. CAS # 63148-62-9.
Minimum Flash Point: 200°C
(392°F).
*For temperatures below 50°C, the KV5000 instrument
can only be used in Automatic Mode (See Section 5.5).
The low temperatures will cause condensation on the jar
surface compromising visibility of the viscometer tubes.
NOTE: Do not use bath fluids that will
decompose or volatilize producing flammable
vapors below the maximum instrument operating
temperature +25°C.
NOTE: Coloration of the Mineral or Silicon Bath
Oil is an indication that the Medium must be
changed. See Draining instructions in section 7.3
of this document. When a decision is made to
discard this material, dispose of this material and
its container to a hazardous of special waste
collection point. Country, State, or local laws may
impose additional regulatory requirements
regarding disposal. Dispose in accordance to all
applicable regulations.
WARNING: Bath oils contaminated with
light ends can pose a flammability hazard.
5.2 Power
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 Engage the Viscometer in Optical
Sensor Assembly
NOTE: Before engaging the viscometer, make
sure the optical sensors do not extend beyond the
inner wall of the clamp. They should be flush with
the clamp wall. Refer to Figure 5, showing both
correct and incorrect orientation of sensors.
Figure 5 Optical Sensors in the Clamp
To insert the glass viscometer tube into the optical
sensor assembly, orient the tube such that the
timing marks on the viscometer tube will line up
with the optical sensor devices. Place the base of
the tube into the optical sensor assembly first as
shown in Figure 6.

KV5000 Instrument & Software
Operation and Instruction Manual
KV5000-Manual -16-
Figure 6. Inserting Base of Viscometer
Engage the viscometer tube into the assembly
by gently pushing the back tube along the timing
marks into the sensors (Refer to Figure 7). Make
sure the sensor clamps fully secure the tube. Slide
the viscometer as far down as possible for
accurate measurements.
Figure 7. Installing Viscometer
If the assembly has spring clamps, then make
sure that the clamps fully secure the viscometer
tube.
Figure 8. Viscometer Tube Completely
Inserted in the Optical Sensor Assembly.
(Optical wires are not shown for illustrative
purposes only.)
If the optical sensor assembly has a Teflon®
retaining ring rather than the spring clip, then fully
engage the viscometer tube into the assembly and
lower the Teflon®retaining ring to hold the tube in
place. Refer to Figure 9.
Figure 9. Viscometer Tube Completely Inserted in the
Optical Sensor Assembly with Teflon®Ring. (Optical wires
are not shown for illustrative purposes only.)
To uninstall the viscometer from the optical
sensor, gently push out from the top of the back
tube slowly (indicated by arrow in Figure 10), until
the tube releases from the clamps. To avoid