Koehler KV4000 User manual

Operation and Instruction Manual
REV D
Koehler Instrument Company, Inc.
1595 Sycamore Avenue • Bohemia, New York 11716-1796 • USA
Toll Free: 1-800-878-9070 (US only) • Tel: [phone] • Fax: [phone]
http://www.koehlerinstrument.com • e-mail: [e-mail]
Petroleum Testing & Analysis Instrumentation • Custom Design & Manufacturing
KV4000
Kinematic Viscosity Bath

CERTIFICATE OF CONFORMANCE
Constant Temperature Kinematic Viscosity Bath,
KV4000
K237X2, K237X8
This certificate verifies that part numbers K237X2, K237X8, Constant
Temperature Kinematic Viscosity Bath, were 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

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Operation and Instruction Manual
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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).

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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 Specification................................................................................................. 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
5Operation...................................................................................................14
5.1 Bath.............................................................................................................................. 14
5.2 Start Up........................................................................................................................ 15
5.3 Control Panel Operation............................................................................................... 15
5.4 Test Procedure............................................................................................................. 17
6Safety Features.........................................................................................18
6.1 Over-Temperature Protection ...................................................................................... 18
6.2 Over-Power Protection................................................................................................. 18
7Troubleshooting........................................................................................18
7.1 Unit does not power-up................................................................................................ 19
7.2 Unit is on and keeps resetting into start up routine...................................................... 19
7.3 Unit is on but bath does not heat up ............................................................................ 19
7.4 Bath heats up but temperature does not stabilize........................................................ 19
8Maintenance..............................................................................................19
8.1 Routine Maintenance ................................................................................................... 19
8.2 Bath Cleaning............................................................................................................... 19
8.3 Draining / Changing Bath Medium............................................................................... 20
8.4 Changing Bath Lamp / Bulb......................................................................................... 21
8.5 Replacement Parts....................................................................................................... 21

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9Wiring Diagrams .......................................................................................22
9.1 K23702, K23708 (115 V) Wiring .................................................................................. 22
9.2 K23792, K23798 (220V) Wiring ................................................................................... 23
10 Service.......................................................................................................24
11 Storage ......................................................................................................24
12 Warranty....................................................................................................24
13 Returned Goods Policy............................................................................24

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1 Introduction
The Koehler KV4000 Kinematic Viscosity
Instrument 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 Specification
*Temperatures below ambient require an optional external
chiller.
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 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.
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.
Models:
K23702, K23708,
K23792, K23798
Electrical
Requirements:
115V 60Hz, single
phase 12.6A
220-240V 50/60Hz,
single phase 7.2A
Temperature Range:
Ambient to 150°C
(302°F)
Optional Temperature
Range:
–20° to 150°C
(–4° to 302°F)*
Temperature Control
Stability:
Exceeds ASTM
requirements
Viscometer Ports:
Seven (7) round 2”
(51mm) ports
Bath Medium:
Water or suitable
heat transfer fluid
Bath Medium Capacity:
22L (5.8 gal) or 34L
(8.9 gal)

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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
KV4000 Kinematic Viscosity Bath
Seven (7) Viscometer Port Covers
KV4000-Manual KV4000 Kinematic
Viscosity Bath Operation and Instruction
Manual
3.2 Unpacking
1. Check Shock Watch Label on Cardboard
Box for indication of rough handling and
possible damage.
2. Check labeling for correct orientation of
instrument. (e.g. This Side Up)
3. Carefully open top of box with box cutter and
remove packing foam.
4. Look inside bath from top of box, to verify
that the Glass Bath Jar is in tact.
5. Make two additional vertical cuts, using box
cutter, along length of two sides of the box
and remove packing foam.
6. Extract instrument and place on suitable cart
for transportation to work area / lab bench.
WARNING: Be sure two or more
individuals are available for extracting and lifting
instrument from box to cart and from cart to
bench. Individuals must lift in accordance to
proper technique. See Figure below.
7. Lift instrument from cart and place on bench.
8. 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.
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.

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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: Make sure the
instrument in placed on a firm, level table in an
area with adequate ventilation or in a hood. The
unit may be leveled by making minor turning
adjustments to the feet located at the base of
the unit. Please note that Koehler does not
supply a level with this equipment.
WARNING: 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 1. Instrument Descriptions
1. Power Switch. This switch controls the
power to the entire unit. When the power
switch is in the ON position, the digital
temperature controller, and the stirrer 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. 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.
5. 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.
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. 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.
8. Interface: Here the user can set operation
parameters and view results on the digital
display.
4.2 Accessories for Running Tests
Glass Capillary Viscometer Tubes for
KV4000
Koehler offers a full selection of glass capillary
kinematic viscometers, which are ordered
separately from the KV4000 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. 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.
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.

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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.
Catalog No.
Size
Approximate
Constant,
cSt/s
Kinematic
Viscosity Range,
cSt
378-025-C02
25
0.002
0.4 to 2
378-050-C02
50
0.004
0.8 to 4
378-075-C02
75
0.008
1.6 to 8
378-100-C02
100
0.015
3 to 15
378-150-C02
150
0.035
7 to 35
378-200-C02
200
0.1
20 to 100
378-300-C02
300
0.25
50 to 250
378-350-C02
350
0.5
100 to 500
378-400-C02
400
1.2
240 to 1,200
378-450-C02
450
2.5
500 to 2,500
378-500-C02
500
8
1,600 to 8,000
378-600-C02
600
20
4,000 to 20,000
378-650-C02
650
45
9,000 to 45,000
378-700-C02
700
100
20,000 to 100,000
Ubbelohde
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.
Catalog No.
Size
Approximate
Constant,
cSt/s
Kinematic Viscosity
Range, cSt
378-000-C03
0
0.001
0.3 to 1
378-00C-C03
0C
0.003
0.6 to 3
378-00B-C03
0B
0.005
1 to 5
378-001-C03
1
0.01
2 to 10
378-01C-C03
1C
0.03
6 to 30
378-01B-C03
1B
0.05
10 to 50
378-002-C03
2
0.1
20 to 100
378-02C-C03
2C
0.3
60 to 300
378-02B-C03
2B
0.5
100 to 500
378-003-C03
3
1
200 to 1,000
378-03C-C03
3C
3
600 to 3,000
378-03B-C03
3B
5
1,000 to 5,000
378-004-C03
4
10
2,000 to 10,000
378-04C-C03
4C
30
6,000 to 30,000
378-04B-C03
4B
50
10,000 to 50,000
378-005-C03
5
100
20,000 to 100,000
Viscometer Holders
To perform viscosity measurements, Koehler
offers viscometer holders for use with the
KV4000. 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
Catalog No.
Size
Approximate
Constant,
cSt/s
Kinematic
Viscosity Range,
cSt
378-025-C01
25
0.002
0.5 to 2
378-050-C01
50
0.004
0.8 to 4
378-075-C01
75
0.008
1.6 to 8
378-100-C01
100
0.015
3 to 15
378-150-C01
150
0.035
7 to 35
378-200-C01
200
0.1
20 to 100
378-300-C01
300
0.25
50 to 250
378-350-C01
350
0.5
100 to 500
378-400-C01
400
1.2
240 to 1,200
378-450-C01
450
2.5
500 to 2,500
378-500-C01
500
8
1,600 to 8,000
378-600-C01
600
20
4,000 to 20,000
378-650-C01
650
45
9,000 to 45,000
378-700-C01
700
100
20,000 to 100,000

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Withdrawal Bulb. Use to pull sample into
viscometer tube.
Catalog Number: K22090
Viscometer Tube Stopper. Insert in the top
opening of the viscometer tube to prevent
sample from flowing due to gravity.
Catalog Number: K23311 for a pack of 12
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 back of the bath. There are two
connections: inlet and outlet. The hose
connections can be secured with copper
wire or pull ties to prevent the tubing from
disengaging from the connection.
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.
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

KV4000 Kinematic Viscosity Bath
Operation and Technical Manual
KV4000-Manual - 14 -
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 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.
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).
NOTE: Do not use bath fluids that will
decompose or volatilize producing flammable
vapors below the maximum instrument operating
temperature +25°C.

KV4000 Kinematic Viscosity Bath
Operation and Technical Manual
KV4000-Manual - 15 -
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 Start Up
1. 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.
2. Install the appropriate ASTM thermometer in
the top of the bath using the holder
provided.
3. Set the desired bath test temperature with
the digital temperature controller and allow
for the bath medium to come to equilibrium.
This process could take 1 to 2 hours due to
the high accuracy requirement of
standardized viscosity tests. Verify the
temperature displayed by the temperature
controller matches that of the ASTM
Thermometer. Calibrate if necessary. (See
Section 4.3 for full operational details of the
temperature controller).
5.3 Control Panel Operation
Figure 3. Control Panel_Main Screen
1. Start / Stop. Pressing the green start button
will start the time, beginning a test. A
single press of the red stop button will
stop the time and a resulting viscosity value
will automatically be calculated and
displayed. Holding the red stop button
for 2 seconds or more will reset the time and
viscosity data.
2. Viscometer Ports. A row of blue box
buttons line across the top of the
control panel. These boxes are designated 1
thru 7 and represent the 7 viscometer ports
available for use in the bath. Pressing the
different blue box buttons allow the user
to virtually scroll through individual test ports
for test monitoring, data entry, etc.
3. Viscometer Data. The Viscometer Data Box
displays information regarding the
viscometer to be used during a test. The
information includes the viscometers serial
number, constant 1, constant 2 (if
applicable), and size. Pressing the
Viscometer Data Box brings the user to the
Viscometer Setup Screen (See Figure 4),
where the user can input the viscometer
parameters displayed.
4. Test Data. Displays the run time during a
test in seconds. Time 1 indicates the
elapsed time for a standard test for a
viscometer with a single constant. The Time
2 is only used when a viscometer has two

KV4000 Kinematic Viscosity Bath
Operation and Technical Manual
KV4000-Manual - 16 -
constants (C1 & C2, e.g. Cannon-Fenske
Opaque). The Test Data area also displays
the Viscosity value automatically after a test
is complete.
Figure 4. Control Panel_Viscometer Setup Screen
1. Serial #. Pressing the serial number button
will bring up a numerical keypad where the
user can input a serial number provided on
the calibration certificate provided with the
viscometer.
2. Type. Press the down arrow for a pull down
menu of available viscometer tube types.
Choose the desired type by pressing on the
appropriate name. The name will then
appear in the Type Window.
3. Size. Pressing the Size button allows the
user to input the size of the viscometer tube
using the pop up numerical keypad. The
size of the viscometer can be found on the
calibration certificate provided with the
viscometer.
4. Constant #1. Press the Constant #1 button
to input the viscometer tube constant value
using the pop up numerical keypad. The
constant value can be found on the
calibration certificate provided with the
viscometer.
5. Constant #2. Press the Constant #2 button
to input a second viscometer tube constant
value using the pop up numerical keypad. A
second constant value can be found on the
calibration certificate provided with
viscometers that utilize two constants. E.g.
Cannon-Fenske Opaque Type.
6. Save to Preset. After inputting the
viscometer parameters: Serial #, Type, Size,
Constant, pressing the Save to Preset
button will save the input
parameters to one of the 20 available
memory programs. The user can then easily
access the information of a specific
viscometer by scrolling the memory presets
using the up and down arrows.
7. Up Arrow. Press the up arrow to scroll
through the 20 available viscometer preset
programs.
8. Down Arrow. Press the down arrow to
scroll through the 20 available viscometer
preset programs.
9. Enter. Once you have input the viscometer
parameters, saved to a selected preset and
chosen that particular preset, press the
enter button to export the
viscometer parameter data to the main
menu screen. The viscometer data entered /
chosen will automatically be uploaded to the
main menu and will be displayed in the
Viscometer Data box.