RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® RavenfieldĀ® BS/C+
High Shear Rate High Temperature Viscometer
ASTM D4741, IP 370, CEC L36 A90
RavenfieldĀ® BS/C+
Reference Manual
Revision 3.2, March 2018
P/N
9728-C51
RavenfieldĀ® BS/C+
Reference Manual
Revision 3.2, March 2018
CANNON Instrument CompanyĀ®
2139 High Tech Road
State College, PA 16803
i
RavenfieldĀ® BS/C+ Reference Manual
Copyright
Copyright Ā© 2018 CANNON Instrument CompanyĀ®. All rights reserved.
Trademarks
CANNONĀ® and the CANNONĀ® logo are registered trademarks of CANNON Instrument CompanyĀ®.
RavenfieldĀ® and the RavenfieldĀ® logo are registered trademarks of CANNON Instrument CompanyĀ®.
Revision History
Revision
Date
Details
Revision 1.0
June, 2008
Initial release
Revision 2.0
September 6, 2017
Update to Reference Manual
Revision 3.0
January 5, 2018
Update to Reference Manual
Revision 3.2
March 28, 2018
Addition to Julabo ā Appendix 11
Contact
Address: CANNON Instrument CompanyĀ®
2139 High Tech Road
State College PA 16803, USA
Phone: 1-814-353-8000; 1-800-676-6232
Fax: 1-814-353-8007
Website: http://www.cannoninstrument.com
Email:
Sales: sales@cannoninstrument.com
Service: service@cannoninstrument.com
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CANNONĀ® Overview
RavenfieldĀ® BS/C+ Reference Manual
Contents
Overview .......................................................................................................................... 1
Description ................................................................................................................................... 1
History, Hardware & Method .................................................................................................... 1
Rigidity and Precision................................................................................................................ 2
Temperature Control and Measurement ................................................................................... 3
Torque Measurement ............................................................................................................... 3
Torque Drive ............................................................................................................................. 3
Rotor and Stator ....................................................................................................................... 3
Ancillary Apparatus ................................................................................................................... 4
Related Documents .................................................................................................................. 6
Specifications / Compliances ......................................................................................................... 7
Notes/Cautions/Warnings ............................................................................................................. 8
Safety precautions ........................................................................................................................ 8
Getting Started ............................................................................................................... 10
Unpack and inspect ..................................................................................................................... 10
Setup the RavenfieldĀ® BS/C+ Viscometer ................................................................................... 13
Location of Units ..................................................................................................................... 14
Inspection and Transit Clamps ................................................................................................ 15
Instructions for Moving & Re-Assembling Instrument ............................................................. 19
Setting Full Scale Deflection (Span) ........................................................................................ 20
Start Instrument ......................................................................................................................... 22
Set Digital Gauge and Height Zero ......................................................................................... 26
Flush the Stator ...................................................................................................................... 26
Calibration Oil ......................................................................................................................... 27
Lower the Head ...................................................................................................................... 27
Computer Control ....................................................................................................................... 28
Enter Sample Data .................................................................................................................. 29
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Contents
Reference Oil Table Maintenance ............................................................................................ 31
Set Operating Mode ............................................................................................................... 32
Set Operating Temperature.................................................................................................... 32
Continuing the āSet Gapā Stage ............................................................................................. 32
Set Shear Rates .......................................................................................................................... 32
Sampling Technique ................................................................................................................... 34
Stop Motor ............................................................................................................................. 34
Adjust Gap ...............................................................................................................................35
Entering a New Depth Gauge Reading .....................................................................................35
Preparing the Calibration Curve .................................................................................................. 36
Calibration Complete .............................................................................................................. 38
Measurement ............................................................................................................................. 40
Sampling Technique......................................................................................................... 42
Prepare for Through-Flush Method ............................................................................................ 42
Commence Through-Flush Method ............................................................................................ 42
Taking a Reading ........................................................................................................................ 43
Normal Use ..................................................................................................................... 44
Proceed with Normal Use ........................................................................................................... 44
Accidental Seizure ...................................................................................................................... 44
Review Data ............................................................................................................................... 45
Calibrate/Clear Instrument ......................................................................................................... 46
Calibrating the LVDT .................................................................................................................. 47
Calibrating the PRT System ........................................................................................................ 49
Data Erasure ............................................................................................................................... 50
Direct Mode Operation ..................................................................................................... 51
Manual Operation/TWEAK Mode ............................................................................................... 52
Direct Mode Control ....................................................................................................................53
One Parameter Selection Rules ...................................................................................................53
Two Parameter Selection ............................................................................................................53
Security feature .......................................................................................................................... 54
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Error! Reference source not found.
Changing Password .................................................................................................................... 54
Autosampler with Windows ............................................................................................. 57
Simple Workflow: Calibration ..................................................................................................... 59
Simple Workflow: Routine Measurements .................................................................................. 60
Specifications.................................................................................................................. 61
Warranty ........................................................................................................................ 62
Products limited warranty ........................................................................................................... 62
Reagent and chemical warranty .................................................................................................. 62
Returning a product to CANNONĀ® ............................................................................................. 63
Required information .............................................................................................................. 63
Hazardous materials ............................................................................................................... 63
Shipping notification ............................................................................................................... 64
Replacement Parts List .................................................................................................... 65
Appendix 1 ..................................................................................................................... 66
Calculations ................................................................................................................................ 66
Appendix 2 ..................................................................................................................... 69
Polishing damaged Rotors and Stators ....................................................................................... 69
Required materials: ................................................................................................................. 69
Damage and Repair ................................................................................................................ 69
Lapping Procedure .................................................................................................................. 69
Appendix 3...................................................................................................................... 71
Spare Parts ..................................................................................................................................71
Appendix 4 ..................................................................................................................... 72
Removal of Damping Chamber ................................................................................................... 72
Damping Chamber Removal Procedure .................................................................................. 72
Appendix 5.......................................................................................................................73
Clearing a Password .................................................................................................................... 73
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Contents
Appendix 6 ...................................................................................................................... 74
Target Torque ............................................................................................................................. 74
Appendix 7 ...................................................................................................................... 80
Instructions for Removing, Cleaning & Re-Fitting the Damping Chamber .................................. 80
Removal of Damping Chamber: .............................................................................................. 80
Replacement of Damping Chamber: ....................................................................................... 80
Appendix 8 ...................................................................................................................... 82
Re-Fitting Plate Springs on Ravenfield BS/C+ Viscometers ......................................................... 82
Re-Aligning the Measurement Chamber ..................................................................................... 85
Appendix 9 ...................................................................................................................... 87
LVDT Re-alignment .....................................................................................................................87
Appendix 10 .................................................................................................................... 89
High Temperature High Shear .................................................................................................... 89
Report Form Tests ASTM D 4741m IP 370, CEC L36 A 90 ........................................................ 89
Calibration .............................................................................................................................. 89
Appendix 11 .................................................................................................................... 90
JulaboĀ® Bath Quick Start ............................................................................................................ 90
Switching On .......................................................................................................................... 90
Adjusting Set Point ................................................................................................................. 90
Set Up Julabo MA Circulator for Use with RavenfieldĀ® by CANNONĀ® BS/C+ HTHS Viscometer . 92
For Use With or Without the Autosampler .............................................................................. 92
List of Figures
Figure 1: Tapered plug ........................................................................................................................... 2
Figure 2: Interior overview of instrument construction ........................................................................ 5
Figure 3: Complete RavenfieldĀ® BS/C+ System assembled and with optional autosampler ............... 13
Figure 4: Diagram of interior of unit .................................................................................................... 14
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Error! Reference source not found.
Figure 5: Lower shipping jig .................................................................................................................. 15
Figure 6: Upper shipping jig .................................................................................................................. 16
Figure 7: Connections at vacuum pump ............................................................................................... 17
Figure 8: Vacuum connections at instrument ...................................................................................... 17
Figure 9: Clean rotor and stator assembly ........................................................................................... 20
Figure 10: Rotor and Stator assembly fitted (section view) ................................................................. 21
Figure 11: Complete rotor and stator assembly ................................................................................... 23
Figure 12: Parts to be assembled for stator ......................................................................................... 24
Figure 13: Rotor and stator assembly .................................................................................................. 25
Figure 14: Software Version ................................................................................................................. 28
Figure 15: Main Menu Screen .............................................................................................................. 28
Figure 16: Constants Screen ................................................................................................................. 29
Figure 17: Rotor constants screen ........................................................................................................ 29
Figure 18: Error/incorrect or incomplete data message ...................................................................... 30
Figure 19: Reference Oil Table ............................................................................................................. 31
Figure 20: Shear Rate Screen ................................................................................................................ 32
Figure 21: New Calibration Screen ....................................................................................................... 33
Figure 22: Calibration Screen ............................................................................................................... 33
Figure 23: Cutoff screen ....................................................................................................................... 34
Figure 24: Adjust Gap Screen ............................................................................................................... 35
Figure 25: Calibration Screen ............................................................................................................... 36
Figure 26: Torque, temperature and speed screen .............................................................................. 37
Figure 27: Calibration complete screen................................................................................................ 38
Figure 28: Calibration table .................................................................................................................. 39
Figure 29: Main menu screen ............................................................................................................... 40
Figure 30: Torque, temperature and speed ......................................................................................... 41
Figure 31: View Stored Data screen ..................................................................................................... 45
Figure 32: Set Up Instrument Constants sub-menu ............................................................................. 46
Figure 33: Calibrate LVDT screen .......................................................................................................... 47
Figure 34: Applying torque load ........................................................................................................... 47
Figure 35: Position of 150 gm calibration weight ................................................................................. 48
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Contents
Figure 36: PRT Offset Correction ......................................................................................................... 49
Figure 37: Direct mode screen ............................................................................................................. 51
Figure 38: Direct mode options screen ................................................................................................ 52
Figure 39: TWEAK mode ...................................................................................................................... 52
Figure 40: Change password screen .................................................................................................... 55
Figure 41: Password changed screen ................................................................................................... 55
Figure 42: Incorrect password screen .................................................................................................. 56
Figure 43: RavenfieldĀ® autosampler .................................................................................................... 57
Figure 44: Diagram of front of autosampler ........................................................................................ 58
Figure 45: Target torque ...................................................................................................................... 74
Figure 46: Torque equation ................................................................................................................. 75
Figure 47: rotor and stator ................................................................................................................... 75
Figure 48: Torque graph ....................................................................................................................... 77
Figure 49: Torque graph ....................................................................................................................... 77
Figure 50: Torque graph ....................................................................................................................... 78
Figure 51: Torque graph ....................................................................................................................... 78
Figure 52: Target torque ...................................................................................................................... 79
Figure 54: Damping chamber components .......................................................................................... 81
Figure 55: Instrument on its back with block for support ................................................................... 82
Figure 56: Plate spring with screws ..................................................................................................... 83
Figure 57: Rollers with Jig Kit ............................................................................................................... 83
Figure 58: Insert block jig under motor sleeve .................................................................................... 84
Figure 59: LVDT and Allen screw .......................................................................................................... 87
Figure 60: Julabo display diagram ........................................................................................................ 91
List of Tables
Table 1: Related documents ................................................................................................................. 6
Table 2: Specifications and compliances ............................................................................................... 7
Table 3: Packing list (main components) ............................................................................................ 11
viii
RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Error! Reference source not found.
Table 4: Contents of Tool Kit ............................................................................................................... 11
Table 5: Specifications ......................................................................................................................... 61
Table 6: RavenfieldĀ® BS/C & BS/C+ replacement parts ....................................................................... 65
Table 7: Spare Parts List........................................................................................................................ 71
Table 8: Results ..................................................................................................................................... 89
1
CANNONĀ® Overview
RavenfieldĀ® BS/C+ Reference Manual
Overview
The CANNONĀ® RavenfieldĀ® BS/C+ Viscometer is a compact, high precision, tapered plug viscometer
designed to measure the high temperature, high shear viscosity of engine lubricants and other oils
according to ASTM D4741, CEC L-36-A-90 and IP 370 as specified by SAE J300 and ACEA. The HTHS
BS/C+ Tapered Plug Viscometer also complies to ASTM D4683 with no bias and is capable of testing
across a wide range of temperatures and shear rates.
Description
The RavenfieldĀ® High Shear Viscometer was specifically designed to perform measurements on the
viscosity of oils at shear rates of the order of 10
6
s
-1
at of 150Ā° C temperature, although these are not
limiting conditions.
At the same time, the design was seen as the basis of a new range of viscometers and the possible
requirements of many different measuring systems were considered. The major requirements of
any instrument for viscosity measurement are rigidity of construction and precision of alignment of
the measuring system. Also required are a convenient method of torque measurement, having
constancy and accuracy, and reliable electronics. Further, since media usually exhibit a high
temperature coefficient of viscosity, also necessary is a means of controlling and measuring
temperature and preferably of raising the temperature of a new sample rapidly.
History, Hardware & Method
The idea of measuring viscosity under high shear conditions first occurred to Albert Kingsbury in the
late 19th Century during his pioneering work in the thrust bearing carrying his name. Kingsbury
created the tapered plug geometry. In the later part of the 20th Century, Roy Banks and others at BP
Research in Sunbury, UK took the earlier Kingsbury work and applied it to the Ferranti-Shirley
rheometer in conjunction with a Cannon CCSĀ® rotor and stator. They achieved shear rates of the
order of 150-250 k s
-1
. Jim Taylor of RavenfieldĀ® was invited to submit a new instrument design for
BP to evaluate that extended the shear rate to at least 10
6
s
-1
thus leading him to quit his job and run
RavenfieldĀ® full time. After successful testing, and with a lot of work, method CEC L 36 was born.
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Overview
Kingsburyās innovation was to allow him to make mechanically difficult measurements of lubricants
at relatively high shear rates without having to create a very tightly controlled gap.
The tapered plug, pictured in Figure 1, is a simple modification of the classic Searle geometry where
the inner part spins inside the outer, as opposed to the Couette where the outer spins around the
inner.
In the modification, a taper is imposed on the cylindrical surfaces, as shown in Figure 1. By adjusting
the height between the components it is possible to precisely fine-tune the gap between the parts
since the gap varies as the TAN of the angle of the ī©ī½ī ī īŖīī¶ī½ī ī .
Figure 1: Tapered plug
An often overlooked problem with concentric cylinder geometries is the variation of shear rate
across the gap since shear rate is measured at an infinitesimal cylindrical lamina. The shear rate at
the outer wall is higher than the shear rate at the inner wall. The effect is minimized if the ratio of
gap-to-radius of the cup is maximized.
Given that the nominal working gap in the RavenfieldĀ® HTHS is 2.8Āµ, and the radius approximately
10,000Āµ, there is an approximate variation in shear rate across the gap of 1/3000.
Rigidity and Precision
The main base frame and pillar of the instrument are machined from billet aluminum. The moving
head of the machine is mounted on a long, pre-loaded base ball slide. This chamber is supported on
special plate springs attached to a yoke fastened to the ball slide.
In order to separate the rotor and stator, the yoke carrying the motor and measuring system is
raised by a lifting screw operated by a handle on the side of the base.
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Overview
The yoke is lowered until a hardened steel plate rests on a finely threaded screw with a ball end
acting as a kinematic stop. This arrangement gives a fine adjustment to the vertical position of the
rotor within the stator, and allows the yoke to be raised and lowered very precisely to the same
position. Repeatability is better than Ā± 2 micron.
The vertical position of the yoke is precisely measured by a digital gauge. The measurement system
is designed to account for thermal expansion and is compensated to a degree by opposing vertical
expansion of the measurement chamber and its mounting base. A rigid, non-plastic thermal
insulator is used between chamber and base. A diagram of the interior of the instrument is outlined
in Figure 2.
Temperature Control and Measurement
The measurement system is jacketed by an annular chamber which circulates fluid from an external
bath, allowing the temperature of the sample to be closely regulated and rapidly stabilized to the
desired temperature. Maximum productivity is reached at 80 tests per day on 40 samples.
Torque Measurement
Torque is measured with plate springs. The resulting movement is measured by a non-contacting
inductive transducer. The torque measurement components are mounted as far as possible from
the heated components of the apparatus.
The movement measurement is converted electronically into a digital measurement of torque in
gram centimeters and selected to give whole numbers.
Torque Drive
The driving motor is a d.c. servomotor that drives through a torque-limiting clutch. This minimizes
the damage caused to both rotor and stator should a foreign body enter the system and cause a
seizure. The main shaft is designed with a connector driving the rotor through a flexible coupling,
ensuring that no side thrust is transmitted to the rotor.
Rotor and Stator
The form and dimensions of the rotor and stator unit follow closely with the design outlined in the
paper by Pike, Banks and Kulik āA simple High Shear Viscometer ā Aspects of Correlation with Engine
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Overview
Performanceā S.A.E. 780981, with the principle of a truncated cone rotating in a tapered bore. The
rotor is centered within the stator using flats that permit the formation of a hydro-dynamic wedge
of oil and is driven through a universal coupling that aid in allowing the natural forces to work
properly and center the rotor.
Ancillary Apparatus
The normal use of the instrument requires ancillary apparatus for waste samples, solvent aspiration
and temperature control. This includes temperature controlled bath, waste oil receiver and vacuum
pump as shown in Figure 3 in the section āSetup the RavenfieldĀ® BS/C+ Viscometerā. A temperature
measurement facility is built in to the instrument.
6
CANNONĀ® Overview
RavenfieldĀ® BS/C+ Reference Manual
Related Documents
Table 1: Related documents
Title Reference Number
Standard Test Method for Measuring Viscosity at High Temperature
and High Shear Rate by Tapered-Plug Viscometer
ASTM D4741
Procedure for Gasoline Engine Cleanliness Test
CEC L-36-A-90
Standard Test Method for Measuring Viscosity at High Temperature
and High Shear Rate by Tapered-Plug Viscometer
IP 370
7
CANNONĀ® Overview
RavenfieldĀ® BS/C+ Reference Manual
Specifications / Compliances
Table 2: Specifications and compliances
Specifications Details
Model
CANNONĀ® RavenfieldĀ® BS/C+ Viscometer
Methodology
ASTM D4741, CEC L-36-A-90, IP370
Applications
High temperature, high shear viscosity of engine lubricants and
other oils
Dimensions (W Ć D Ć H)
With autosampler
62.2 cm Ć 38.1 cm Ć 64.8 cm (24.5 in Ć 15 in Ć 25.5 in)
83.3 cm x 41.9 cm x 64.8 cm ( 32.8 in x 16.5 in x 25.5 in)
Weight
With autosampler
30 kg (66 lb)
50 kg (110 lb)
Operational temperature
range
40 Ā°C to +180 Ā°C (Ā± 0.02 Ā°C)
Accuracy at 150 Ā°C, Ā± 0.02 Ā°C for viscosity range 1.5 mPaĀ·s
(cP) to 5.9 mPaĀ·s (cP) at 10
ī¬ŗ
ī
ī¬æī¬µ
shear rate
Accuracy at 100 Ā°C, Ā± 0.02 Ā°C for viscosity range 4.2 mPaĀ·s (cP) to
18.9 mPaĀ·s (cP) at 10
ī¬ŗ
ī
ī¬æī¬µ
shear rate
Maximum throughput
>12 tests per hour
Automated sample capacity
1 positions (without autosampler)
22 (with optional model DR autosampler)
Minimum sample
10 mL sample
Viscosity range
Up to 30 mPa-s (cP)*
*depending on shear rate and temperature
Power requirements
100 V
AC
, 50/60 Hz, 1200 W; 115 V
AC
, 50/60 Hz, 1200 W or
230 V
AC
, 50/60 Hz, 1200 W
Operating conditions
10% to 75% relative humidity (non-condensing), Installation
Category II, Pollution Degree 2
Compliance
CE Mark: EMC Directive (89/336/EEC); Low Voltage Directive
(73/23/EC); HI-POT (1900 VDC, 60 sec)
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RavenfieldĀ® BS/C+ Reference Manual
CANNONĀ® Overview
Notes/Cautions/Warnings
Notes, caution, and warnings are used in the manual to call an operatorās attention to important
details prior to performing a procedure or step. Read and follow these important instructions.
Failure to observe these instructions may void warranties, compromise operator safety, and/or
result in damage to the RavenfieldĀ® BS/C+.
Notes provide more information about content.
Cautions alert the operator to conditions that may damage equipment.
Warnings alert the operator to conditions that may cause injury.
Safety precautions
Please observe the following general safety precautions for proper and safe operation of the
CANNONĀ® RavenfieldĀ® BS/C+ high temperature, high shear rate viscometer.
ā¢ Only qualified personnel should operate the RavenfieldĀ® BS/C+.
ā¢ Make sure that you read and understand all operating instructions and safety precautions
listed in this manual before installing or operating your unit. If you have questions regarding
instrument operation or documentation, contact CANNON Instrument CompanyĀ®.
ā¢ Do not deviate from the installation, operation, or maintenance procedures described in this
manual. Improper use of the RavenfieldĀ® BS/C+ may result in a hazardous situation and can
void the manufacturerās warranty.
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