Brookfield DV-II+ Programmable Viscometer User Manual

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BROOKFIELD DV-II+

PROGRAMMABLE VISCOMETER

Operating Instructions

Manual No. M/97-164-F1102

SPECIALISTS IN THE MEASUREMENT AND CONTROL OF VISCOSITY

BROOKFIELD ENGINEERING LABORATORIES, INC. 11 Commerce Boulevard, Middleboro, MA 02346-1031 USA

TEL508-946-6200 F

508-946-6262

Brookfield Engineering Labs., Inc. Page 1 Manual No. M/97-164-F1 102

or 800-628-8139 (USA only)

NTERNET

www.brookfieldengineering.com

I. INTRODUCTION ............................................................................................................................3

I.1 Components .........................................................................................................................4

I.2 Utilities ..................................................................................................................................4

I.3 Specifications .......................................................................................................................5

I.4 Installation ............................................................................................................................6

I.5 Safety Symbols and Precautions..........................................................................................7

I.6 Key Functions.......................................................................................................................7

I.7 Cleaning ...............................................................................................................................9

II. GETTING STARTED ....................................................................................................................10

II.1 Autozero .............................................................................................................................10

II.2 Spindle Selection................................................................................................................ 11

II.3 Speed Selection, Setting, Running.....................................................................................12

II.4 Display Selection ................................................................................................................13

II.5 Autorange...........................................................................................................................14

II.6 Out of Range ......................................................................................................................15

II.7 Temperature Display...........................................................................................................16

II.8 Printing ...............................................................................................................................16

II.9 Making Viscosity Measurements ........................................................................................17

II.10 Time Modes for Viscosity Measurement.............................................................................18

III. OPTIONS...................................................................................................................................... 19

III.1 Introduction to OPTIONS....................................................................................................19

III.2 Setup ..................................................................................................................................21

III.2.1 Temperature Display...............................................................................................22

III.2.2 Units of Measurement ............................................................................................. 22

III.2.3 Motor Speed Set Selection.....................................................................................23

III.2.4 Printer Output Port...................................................................................................24

III.2.5 Data Averaging ........................................................................................................24

III.3 Time Modes........................................................................................................................25

III.3.1 Time to Stop ............................................................................................................26

III.3.2 Time to Torque .........................................................................................................28

III.3.3 Print Time Interval....................................................................................................30

III.3.4 PC Program (On/Off) ...............................................................................................31

III.3.5 Download a Program...............................................................................................31

III.3.6 Run a Program ........................................................................................................32

IV. DVLOADER SOFTWARE ...........................................................................................................35

IV.1 B.E.V.I.S. Overview ............................................................................................................35

IV.2 Description of B.E.V.I.S. Commands..................................................................................36

IV.3 Creating a B.E.V.I.S. Program............................................................................................37

IV.4 Downloading a B.E.V.I.S. Program.....................................................................................39

IV. 5 Example Programs .............................................................................................................40

Appendix A - Cone/Plate Viscometer Set-Up ...........................................................................42

Appendix B - Viscosity Ranges.................................................................................................46

Appendix C - Variables in Viscosity Measurements..................................................................49

Appendix D - Spindle and Model Codes ...................................................................................51

Appendix E - Calibration Procedures........................................................................................54

Appendix F - Speed Sets..........................................................................................................61

Appendix G - Communications .................................................................................................62

Appendix H - Model S Laboratory Stand ..................................................................................65

Appendix I - DVE-50 Probe Clip..............................................................................................67

Appendix J - Fault Diagnosis and Troubleshooting..................................................................68

Appendix K - Warranty Repair and Service ..............................................................................72

Brookfield Engineering Labs., Inc. Page 2 Manual No. M/97-164-F1102

I. INTRODUCTION

The Brookfield Programmable DV-II+ Viscometer measures fluid viscosity at given shear rates. Viscosity is a measure of a fluid’s resistance to flow. You will find a detailed description of the mathematics of viscosity in the Brookfield publication ”More Solutions to Sticky Problems” a copy of which was included with your DV-II+.

The principal of operation of the DV-II

+ is to drive a spindle (which is immersed in the test

fluid) through a calibrated spring. The viscous drag of the fluid against the spindle is measured by the spring deflection. Spring deflection is measured with a rotary transducer. The measurement range of a DV-II

+ (in centipoise or milliPascal seconds) is determined by the rotational

speed of the spindle, the size and shape of the spindle, the container the spindle is rotating in, and the full scale torque of the calibrated spring.

There are four basic spring torque series offered by Brookfield:

Spring Torque

Model dyne-cm milli Newton - m

LVDV-II

+ 673.7 0.0673

RVDV-II+ 7,187.0 0.7187 HADV-II+ 14,374.0 1.4374 HBDV-II+ 57,496.0 5.7496

The higher the torque calibration, the higher the measurement range. The measurement range for each torque calibration may be found in Appendix B.

All units of measurement are displayed according to either the CGS system or the SI system.

1. Viscosity appears in units of centipoise (shown as “cP”) or milliPascal-seconds (shown

as “mPa•s”) on the DV-II+ Viscometer display.

2. Shear Stress appears in units of dynes/square centimeter (“D/cm2”) or Newtons/square meter (“N/m2”).

3. Shear Rate appears in units of reciprocal seconds (“1/SEC”).

4. Torque appears in units of dyne-centimeters or Newton-meters (shown as percent “%” in both cases) on the DV-II+ Viscometer display.

Note: To change CGS to SI units on the display - see Section III.2.2.

The equivalent units of measurement in the SI system are calculated using the following conversions:

SI CGS

Viscosity: 1 mPa•s = 1 cP Shear Stress: 1 Newton/m

= 10 dyne/cm

Torque: 1 Newton-m = 107 dyne-cm

References to viscosity throughout this manual are done in CGS units. The DV-II+ Viscometer provides equivalent information in SI units.

Brookfield Engineering Labs., Inc. Page 3 Manual No. M/97-164-F1 102

I.1 Components

Component Part Number Quantity

DV-II+ Viscometer varies 1 Model S Laboratory Stand MODEL S 1 Spindle Set with Case varies 1

LVDV-II+ set of four spindles SSL or RVDV-II+ set of six spindles (#2 - #7) SSR or HA/HBDV-II+ set of six spindles (#2 - #7) SSH

For Cone/Plate versions: a spindle wrench, one cone spindle and sample cup, Part No. CPE-44Y replace the spindle set.

Power Cord 1 DVP-65 for 115 or DVP-66 for 230

RTD Temperature Probe DVP-94Y 1 Guard Leg: 1

LVDV-II+ B-20Y RVDV-II+ B-21Y

Carrying Case DVE-7Y 1 DVLOADER Software Disk (3-1/2") DVLOADER 1 Interconnecting Cable DVP-80Y 1 Operating Manual M/97-164 1

Please check to be sure that you have received all components, and that there is no damage. If you are missing any parts, please notify Brookfield Engineering or your local Brookfield agent immediately. Any shipping damage must be reported to the carrier.

I.2 Utilities

Input Voltage: 115 VAC or 230 VAC Input Frequency: 50/60 Hz Power Consumption: 30 VA

Power Cord Color Code:

United States Outside United States

Hot (live) Black Brown Neutral White Blue Ground (earth) Green Green/Yellow

Brookfield Engineering Labs., Inc. Page 4 Manual No. M/97-164-F1102

I.3 Specifications

Speeds: Interleaved: LV/RV (18 speeds)

Sequential: LV/RV (18 speeds) Custom: 54 speeds, user selectable

Note: Refer to Appendix F for detailed list of all speeds.

Weight: Gross Weight 23 lbs. 10.5 kg.

Net Weight 20 lbs. 9 kg. Carton Volume 1.65 cu. ft. 0.05 m

Temperature sensing range: -100˚C to 300˚C (-148˚F to 572˚F) Analog Torque Output: 0 - 1 Volt DC (0 - 100% Torque) Analog Temperature Output: 0 - 375 Volts DC (-100°C to +275°C) RS232 Compatible Serial Port for use with an attached printer or PC. Centronics Compatible Parallel Port for use with an attached printer. Viscosity Accuracy: ±1.0% of full scale range

Viscosity Repeatability: ±0.2% Temperature Accuracy: ±1°C : -100°C to +149°C

±2°C : +150°C to +300°C

Electrical Certifications: CUL, CE

Operating Environment: 0°C to 40°C temperature range (32°F to 104°F)

20% - 80%R.H.: non-condensing atmosphere

Electrical Certifications:

Conforms to CE Standards: BSEN 50081-1: Emission Standard - Light Industrial BSEN 50082-1: Immunity Standard - Light Industrial BSEN 50081-2: Emission Standard - Industrial BSEN 50082-2: Immunity Standard - Industrial BSEN 61010-1: Safety requirements for electrical equipment, for measurement, control

and laboratory use

Approved Standards: CSA Class 8721 84 - Electrical Equipment for Laboratory Use

This product has been certified to the applicable CSA and ANSI/UL Standards, for use in Canada and the U.S.

Installation Category (over voltage category) II: Classification of parts of installation systems or circuits in local level, portable equipment, appliances, etc. (based on table 1 of IEC 664).

Brookfield Engineering Labs., Inc. Page 5 Manual No. M/97-164-F1 102

I.4 Installation

Note: “IQ, OQ, PQ”, a guideline document for installation, operation and perfor-

mance validation for your DV-II+ digital viscometer can be downloaded from our web site www.brookfieldengineering.com.

1) Assemble the Model S Laboratory Stand (refer to assembly instructions in Appendix H).

2) Put the viscometer on the stand.

3) Connect the RTD probe to the socket on the rear panel of the DV-II

4) The Viscometer must be leveled. The level is adjusted using the two leveling screws on the

base. Adjust so that the bubble level on top of the DV-II+ is centered within the circle.

Note: Check level periodically during use.

5) Remove the white shipping cap which secures lower coupling nut on Viscometer to pivot cup.

6) Make sure that the AC power switch at the rear of the DV-II+ is in the OFF position. Connect the power cord to the socket on the back panel of the instrument and plug it into the appropriate AC line.

The AC input voltage and frequency must be within the appropriate range as shown on the nameplate of the viscometer.

Note: The DV-II+ must be earth grounded to ensure against electronic failure!!

7) Turn the power switch to the ON position and allow to warm up for 10 minutes before performing autozero.

8) For Cone/Plate models, refer to Appendix A.

9) If appropriate, connect interconnecting cable to serial port for connection of DV-II+ to PC or printer.

10) If appropriate, connect interconnecting cable to parallel port for connection of DV-II+ to printer.

11) If appropriate, connect interconnecting cable to analog (serial) port for connection of DVII+ to chart recorder.

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I.5 Safety Symbols and Precautions

Safety Symbols

The following explains safety symbols which may be found in this operating manual.

Indicates hazardous voltages may be present.

Refer to the manual for specific warning or caution information to avoid personal injury or damage to the instrument.

Precautions

If this instrument is used in a manner not specified by the manufacturer, the protection provided by the instrument may be impaired.

This instrument is not intended for use in a potentially hazardous environment.

In case of emergency, turn off the instrument and then disconnect the electrical cord from the wall outlet.

The user should ensure that the substtances placed under test do not release poisonous, toxic or flammable gases at the temperatures which they are subjected to during the testing.

I.6 Key Functions

Figure 1 shows the control keys on the face of the DVII+ Viscometer. The following describes the function of each key.

UP ARROW

This key is used to scroll UP (in an increasing value direction) through the available speed, spindle and Option menu tables.

DOWN ARROW

This key is used to scroll DOWN (in a decreasing value direction) through the available speed, spindle and option menu tables.

MOTOR

ON/OFF ESCAPE

MOTOR ON/OFF/ESCAPE

Turns the motor ON or OFF. ESCAPE exits the Options menu.

MOTOR ON/OFF

ESCAPE

SET

SPEED

SELECT

DISPLAY

OPTIONS

TAB

Figure 1

ENTER

AUTO

RANGE

SELECT

SPINDLE

SET

SPEED

SET SPEED

Causes the DV-II+ to begin running at the currently selected speed. This function works only when the motor is ON. Also used to select custom speeds when in the Custom Speed option.

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SELECT DISPLAY

ENTER

AUTO

RANGE

SELECT

SPINDLE

SELECT DISPLAY

Selects the data parameter to be displayed:

cP Viscosity (cP or mPa.s) SS Shear Stress (dynes/cm2 or Newtons/m2) SR Shear Rate (1/sec)

ENTER/AUTO RANGE

ENTER: Used to execute the currently flashing option. AUTO RANGE: Presents the maximum (100% torque) viscosity attainable using the

selected spindle at the current viscometer spindle speed.

SELECT SPINDLE

Initiates spindle selection on the first press and then selects the currently scrolled-to spindle when pressed a second time.

Selects printing and non-printing modes when a printer is attached.

OPTIONS

TAB

OPTIONS/TAB

OPTIONS: Presents the Options menu, flashing the last escaped option. TAB: Toggles between selectable items when indicated, as shown in Figure 2.

Note: Symbol indicating the

OPTIONS/TAB key

Note: Inverted text (black background with white lettering) indicates that the

information is flashing on the viscometer display.

L°F(FAHRENHEIT)

CGS UNITS

Figure 2

Brookfield Engineering Labs., Inc. Page 8 Manual No. M/97-164-F1102

I.7 Cleaning

Be sure to remove the spindle from the instrument prior to cleaning. Severe instrument damage may result if the spindle is cleaned in place.

Instrument and Keypad: Clean with a dry, non-abrasive cloth. Do not use solvents

or cleaners.

Immersed Components (spindles): Spindles are made of stainless steel. Clean with a non-

abrasive cloth and solvent appropriate for sample material.

Note: When cleaning, take care not to apply excessive force - it may bend the spindles.

Brookfield Engineering Labs., Inc. Page 9 Manual No. M/97-164-F1 102

II. GETTING STARTED

II.1 Autozero

Before readings may be taken, the Viscometer must be Autozeroed. This action is performed each time the power switch is turned on. The display window on the Viscometer will guide you through the procedure as follows:

Turn the power switch (located on the rear panel) to the ON position. This will result in the screen display shown in Figure 3. The viscosity measurement range is indicated by the information in the lower left, in this case RV. For most DV-II+ Viscometers, this information will be either “LV” or “RV”.

BROOKFIELD DV-2+ RV VISCOMETER

Figure 3

After a few seconds, the following screen appears:

BROOKFIELD DV-2+ VERSION: 6.1

Figure 4

No key press is required at this point. After a short time, the display will clear and the following will be displayed:

REMOVE SPINDLE PRESS ANY KEY

Figure 5

After removing the spindle and pressing any key, the DV-II+ begins its Autozero. The screen will flash "Autozeroing."

After approximately 15 seconds, the display shows the screen in Figure 6:

REPLACE SPINDLE PRESS ANY KEY

Figure 6

Pressing any key at this point results in the display of the DV-II+ default screen:

CP 0.0 20.1C OFFRPM % 0.0

Figure 7

The display will vary depending upon the selection of temperature (°F or °C) and units of viscosity (cP or mPa•s).

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SELECT

II.2

Spindle Selection

SPINDLE

LVDV-II+ Viscometers are provided with a set of four spindles and a narrow guardleg; RVDV-II+ Viscometers come with a set of six spindles and a wider guardleg; HADV-II+ and HBDV-II+ Viscometers come with a set of six spindles and no guardleg. (See Appendix E for more information on the guardleg.)

The spindles are attached to the viscometer by screwing them onto the lower shaft. Note that the spindles have a left-hand thread. The lower shaft should be secured and slightly lifted with one hand while screwing the spindle to the left. The face of the spindle nut and the matching surface on the lower shaft should be smooth and clean to prevent eccentric rotation of the spindle. Spindles can be identified by the number on the side of the spindle coupling nut.

The DV-II+ must have a Spindle Entry Code number to calculate Viscosity, Shear Rate and Shear Stress values. The DV-II

+ memory contains parameters for all standard Brookfield spindles

including custom spindles and the two digit entry code for each spindle (the complete list of entry codes may be found in Appendix D).

Note: The DV-II+ will remember the Spindle Entry Code which was in use when the

power was turned off.

Pressing the SELECT SPINDLE key will display the current selected spindle code instead of temperature and cause the character S to begin to blink . It will blink for about three seconds. If the

UP or DOWN ARROW keys are pressed (while S is blinking) the two character spindle value to the right

of the S character will begin to change (in either an increasing or decreasing direction depending upon which ARROW key is pressed) for each press of the key. If the ARROW key is pressed and held, the display will scroll through the spindle codes for as long as the ARROW key is depressed. When it reaches the last item in the list (either at the top or bottom of the list) the spindle code displayed will “roll-over” to either the first or last spindle code and the scroll action will continue.

When the desired spindle code is displayed, release the ARROW key to halt further scrolling. Press the SELECT SPINDLE key once again. This will cause the S character to cease blinking and the new spindle code will be accepted for use in viscometer calculations.

Note: You have approximately three seconds in which to press the SELECT SPINDLE

key before the before the the desired spindle.

blinking

stops. If you fail to press the SELECT SPINDLE key

stops you will have to repeat the above steps and re-select

The DV-II+ will begin to calculate using the new spindle parameters as soon as the SELECT SPINDLE key is pressed the second time.

Note: The number 99 spindle is for use with special spindles when using Brookfield’s

WINGATHER computer program. Refer to the WINGATHER operator manual for further information on using “99” spindles.

The DV-II+ may also be programmed at Brookfield Engineering for “special” user spindles. These “special” spindles will appear on the spindle scroll list starting with designation “AA” and continuing through “AZ”. Contact Brookfield Engineering regarding your needs for special spindles.

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II.3

Speed Selection, Setting, Running

SET

SPEED

There are 54 speeds programmed into the DV-II+. These speeds correspond to the standard LVT, RVT, HAT and HBT dial models (18 possible speeds altogether) plus 36 additional speeds.

The DV-II+ comes with the Sequential Speed Set already selected (see Appendix F). The speed set will start at speed 0.0. It will then scroll up through the LV speeds, pass through speed 0.0 again, and then scroll up through the RV speeds, pass through speed 0.0 again and then repeat the above sequence.

The DV-II

+ can also be configured by the operator to interleave the LV and RV speeds. See Section

III.2.3 on Setup for a description of how to install the Interleave Speed Set. A complete list of speed sets and custom speeds is included in Appendix F. The DV-II+ can be

programmed to select up to 19 of the 54 speeds for use at any one time. Speed 0.0 is the 20th speed and is automatically included. See Section III. 2.3.2 on Setup for a description of how to install a Custom Speed Set.

To select a Viscometer speed first press either the

UP or DOWN arrow keys which will cause the area

to the right of RPM to display the currently selected speed. Figure 8 shows the DV-II+ is operating at 6.0 RPM, and the current selected speed is 6.0 RPM.

cP 123.4 20.1C

6.0RPM6.0 % 15.6

Figure 8

If the ARROW key is pressed just once and then released, the characters “RPM” will blink for three seconds, then will cease blinking resulting in no change to the speed entry.

Note: The speed selection process remembers the last value of scrolled-to speed so

that the next time you initiate a speed change (by pressing an ARROW key), the DV-II+ will begin its scroll display from the last entered value.

The last-scrolled-to speed does not necessarily have to be the same as the speed at which the DVII+ is currently running. The user may operate at a given speed and pre-set the DV-II+ to the next desired speed before that speed will be used. For example, if the DV-II+ is currently running at 6.0 RPM and was previously scrolled to 12 RPM, a single press of either ARROW key would result in the Figure 9 screen display:

cP 123.4 20.1C

6.0RPM12 % 15.6

Figure 9

Pressing the SET SPEED key would cause the DV-II+ to begin running at 12 RPM. If the user did not press the SET SPEED key, the DV-II+ would continue to run at its current speed

of 6 RPM. In fact, you may scroll to a new speed (12 RPM in this example) and press the SET SPEED key at any future time (without further pressing an ARROW key) to immediately cause the DV-II+ to run at the new speed. Pressing the ARROW key at any time reminds the operator of what was selected for the next speed.

Brookfield Engineering Labs., Inc. Page 12 Manual No. M/97-164-F1102

If an ARROW key is pressed and held the DV-II+ will scroll up (or down) through the speed table. When it reaches the last speed in the list (either at the top or bottom of the list) the speed displayed will “roll-over” to either the first or last speed in the table and the scroll action will continue.

When the required speed is displayed, release the ARROW key to halt further scrolling. You have approximately two seconds (before the blinking RPM stops) in which to press the SET SPEED key to immediately begin rotation at the new speed.

Pressing the MOTOR ON/OFF/ESCAPE key stops the Viscometer spindle rotation. Pressing this key sets the DV-II+ to 0.0 RPM and causes the screen display to change as shown in Figure 10:

cP 0.0 20.1C OFFRPM % 0.0

Figure 10

Pressing the MOTOR ON/OFF/ESCAPE key again immediately starts the DV-II+ running at the last scrolled-to-speed. If you had been running at 12 RPM, pressed MOTOR ON/OFF/ESCAPE and then

re-started the DV-II+ by pressing MOTOR ON/OFF/ESCAPE once again, you would again be running at 12 RPM. However, if while the motor was off you had scrolled to a new speed of 0.5 RPM, pressing the MOTOR ON/OFF/ESCAPE key would start the DV-II+ running at 0.5 RPM.

Note: During both spindle or speed selection and scrolling operations, the DV-II+ will

continue to calculate and display Viscometer data as selected.

SELECT

DISPLAY

II.4

Display Selection

Viscosity (displayed in units of cP or mPa•s), Shear Stress and Shear Rate are displayed on the left side of the top line. You may “step” through the three display options by pressing the SELECT

DISPLAY key. For example, the DV-II+ is currently displaying Viscosity as shown in Figure 11:

cP 123e3 20.1C

6.0RPM % 15.6

Figure 11

If the viscosity value exceeds 99,999 scientific notation is used. In Figure 11, the viscosity value is 123,000 cP.

The first press of the SELECT DISPLAY key would display Shear Stress (SS) in Dynes/cm2 (or Newtons/m2), see Figure 12:

SS 29.0 20.1C

6.0RPM % 15.6

Figure 12

If the shear stress value exceeds 99,999, scientific notation is used. The next press of the SELECT DISPLAY key would display Shear Rate (SR) in 1/Sec; see Figure 13.

Brookfield Engineering Labs., Inc. Page 13 Manual No. M/97-164-F1 102

SR 40.0 20.1C

6.0RPM % 15.6

Figure 13

One more press of the SELECT DISPLAY key would result in a return to the viscosity screen, as shown in Figure 11.

Notes: 1. You may step through the display at any time. This will not interrupt any

Viscometer calculations that are in progress.

2. Display of shear rate and shear stress requires selection of appropriate spindles. Otherwise, values displayed will be zero (0).

Units of Measurement

The DV-II+ Viscometer can be configured using the SETUP option (Section III.2.2) to display/ print in either the CGS or SI system of units.

ENTER

II.5

The ENTER/AUTO RANGE key functions as auto range and allows you to determine the maximum calculated viscosity (full scale reading) possible with the current spindle/speed setting only when in the default screen. Pressing the key at any time will cause the current viscosity display to change and show that maximum viscosity. The screen area displaying % (torque) will now display a flashing “%100.0” to indicate this special condition. This maximum viscosity and flashing %100.0 value will be displayed for as long as the ENTER/AUTO RANGE key is depressed. Figure 14 shows the AUTO

RANGE function for the situation where the No. 1 LV spindle is rotating at 60 rpm. The full scale

range is 100.0 cP (or 100.0 mPa.s).

Autorange

AUTO

RANGE

cP 100.0 S61 60 RPM % 100

Figure 14

Notes: 1. If the RPM is 0.0, the maximum viscosity displayed will be 0.0 cP (or 0.0

mPa.s).

2. While the Viscometer is in the Auto Range mode, any data sent to an attached printer or computer reflects the displayed values (i.e. Auto Range values).

3. This function is only available when in the default screen.

Brookfield Engineering Labs., Inc. Page 14 Manual No. M/97-164-F1102

II.6 Out of Range

The DV-II+ gives indications for out-of-range operation. When % (Torque) readings exceed 100% (over-range), the display changes to that shown in Figure 15; EEEE will also appear in the display for % and viscosity or shear stress:

cP EEEE 20.1C 10 RPM % EEEE

Figure 15

You must change either speed or spindle to correct this condition. If you operate at spindle speeds that produce % (Torque) below 10.0 %, the DV-II+ flashes the % (Torque), cP (Viscosity), SS (Shear Stress) and SR (Shear Rate) as shown in Figure 16:

cP 12.4 20.1C 10 RPM % 8.2

Figure 16

Negative % (Torque) will be displayed as shown in Figure 17:

cP ---- 20.1C 10 RPM % -2.2

Figure 17

Figure 18 is an example of the printed output of each of the above conditions.

Normal Operation:

RPM=50 M=RV S=29 %=51.4 cP=10280 D/CM2=1285 1/SEC=12.3 T=20.1C Z00:30

Over-Range Operation (>100% torque) (see Fig. 15):

RPM=50 M=RV S=29 %=EEEE cP=EEEE D/CM2=EEEE 1/SEC=12.3 T=20.1C Z00:30

Under-Range Operation (<10% torque) (see Fig. 16):

?RPM=50 M=RV S=29 %=5.2 cP=1040 D/CM2=130 1/SEC=12.3 T=20.1C Z00:30

Negative Torque Operation (see Fig. 17):

RPM=50 M=RV S=29 %=-0.1 cP=---- D/CM2=---- 1/SEC=12.3 T=20.1C Z00:30

M = Torque Range T = Temperature Z = Time

Figure 18

Brookfield Engineering Labs., Inc. Page 15 Manual No. M/97-164-F1 102

II.7 Temperature Display

The DV-II

+ displays the temperature measured by its RTD temperature probe. Temperature may be

displayed in either ˚C (Centigrade) or ˚F (Fahrenheit) units, depending upon selection from the Options menu. As received, the default temperature display will be in ˚C (Centigrade) units as shown in the Figure 19:

cP 123.4 20.1C 10 RPM % 19.7

Figure 19

If you turn on the DV-II+ with the temperature probe disconnected, or remove the temperature probe at any point after power-up, the display will indicate “- - - -C”. The four “dashes” indicate the absence of the probe. If you were displaying temperature in Fahrenheit units the C would be replaced by an F. Accuracy of temperature measurement for the DV-II+ is shown in Table 1.

Table 1

Temperature Accuracies for

Programmable DV-II+ Viscometer

Temperature Range Temperature Accuracy

-100°C to +149°C ±1.0°C

+150°C to +300°C ±2.0°C

II.8

Printing

The DV-II+ will print data to an attached Serial (RS232) or Parallel (centronics) printer. The printer must be attached to the appropriate rear panel output connector. See Appendix G for configuration and connection requirements.

Data may be printed in two ways:

1. Pressing the PRINT key once (for less than three (3) seconds) will result in the printing of one standard print line.

2. If the PRINT key is pressed and held for more than three (3) seconds, the DV-II+ will then begin continuous printer output at a print rate interval selected via the Options menu (see Section III.4). The display will show a flashing P in front of the % sign. See Figure 20.

cP 123.4 20.1C 10 RPM P% 19.7

Figure 20

To stop continuous printing, press the PRINT key for one (1) second. The flashing P will disappear on the viscometer display.

Figure 21 is an example of the print strings for CGS and SI units.

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For the case of CGS units with non-exponential results:

11020304050607080

RPM=XXX M=XXXXX S=XX %=XXX.X cP=XXXXX D/CM2=XXXXX 1/SEC=XXXXX T=XX.XC ZXX=XX

and CGS units with exponential results.

11020304050607080

RPM=XXX M=XXXXX S=XX %=XXX.X cP=XXXeX D/CM2=XXXeX 1/SEC=XXXXX T=XX.XC ZXX=XX

Similarly, for SI units with non-exponential results.

11020304050607080

RPM=XXX M=XXXXX S=XX %=XXX.X mPas=XXXXX N/M2=XXXXX 1/SEC=XXXXX T=XX.XC ZXX=XX

and SI units with exponential results.

11020304050607080

RPM=XXX M=XXXXX S=XX %=XXX.X mPas=XXXeX N/M2=XXXeX 1/SEC=XXXXX T=XX.XC ZXX=XX

M = Torque T = Temperature Z = Time

Figure 21

When printing via the parallel port, please note that if a printer is not attached to the viscometer, the following screen appears:

PRINTER ERROR CHECK CONNECTION

Figure 22

II.9 Making Viscosity Measurements

The following general procedure is used for making viscosity measurements. Brookfield recommends the use of a 600 ml Low Form Griffin beaker when using LV/RV/HA/HB spindles.

1. Mount the guardleg on the DV-II+ Viscometer (LV and RV series) and insert into the container.

2. Insert and center spindle in the test material until the fluid's level is at the immersion groove on

the spindle's shaft. With a disc-type spindle, it is necessary to tilt the spindle slightly while immersing to avoid trapping air bubbles on its surface. Attach the spindle to the lower shaft of the viscometer. Lift the shaft slightly, holding it firmly with one hand while screwing the spindle on with the other (note left-hand thread). Avoid putting side thrust on the shaft. Verify the proper spindle immersion depth and that the viscometer is level.

3. The process of selecting a spindle and speed for an unknown fluid is normally trial and error. An

appropriate selection will result in measurements made between 10-100 on the instrument % torque scale. Two general rules will help in the trial and error process.

1) Viscosity range is inversely proportional to the size of the spindle.

2) Viscosity range is inversely proportional to the rotational speed. To measure high viscosity, choose a small spindle and/or a slow speed. If the chosen spindle/

speed results in a reading above 100%, then reduce the speed or choose a smaller spindle. Experimentation may reveal that several spindle/speed combinations will produce satisfactory

results between 10-100%. When this circumstance occurs, any of the spindles may be selected.

Brookfield Engineering Labs., Inc. Page 17 Manual No. M/97-164-F1 102

Non-Newtonian fluid behavior can result in the measured viscosity changing if the spindle and/ or speed is changed. See our publication, “More Solutions to Sticky Problems,” for more detail.

Turn on motor. Allow time for the indicated reading to stabilize. The time required for stabilization will depend

on the speed at which the Viscometer is running and the characteristics of the sample fluid. For maximum accuracy, readings below 10% should be avoided.

Record values.

4. Press the

MOTOR ON/OFF/ESCAPE key and turn the motor “OFF” when changing a spindle or

changing samples. Remove spindle before cleaning.

5. Interpretation of results and the instrument's use with non-Newtonian and thixotropic materials is discussed in the booklet, "More Solutions to Sticky Problems", and in Appendix C, Variables in Viscosity Measurements.

II.10 Time Modes for Viscosity Measurement

The Time Modes allow the viscometer user to implement the unattended Time to Stop and Time to Torque capabilities of the DV-II+ Viscometer. These features will allow the user to set up the viscometer (i.e. select spindle and speed) and then record readings for a fixed period of time (Time to Stop) or until a set torque value is attained (Time to Torque). When timing begins, a message will be displayed showing time remaining (or time elapsed) and the appropriate display item (viscosity or torque) will be updated continuously during the event. Upon completion, the viscometer will stop and display a screen stating that the test is complete and will also display the final recorded value for the viscosity in the first case, or the time in minutes and seconds to reach the torque limit in the second case. Pressing the UP or DOWN ARROW keys will allow additional viscometer data to be examined. Pressing any other key (except the PRINT or ENTER/AUTORANGE key) will bring the user back to the default (normal) viscometer display with the motor OFF. Refer to the Time Modes in Section III.3.

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III. OPTIONS

OPTIONS

III.1

The OPTIONS/TAB key provides access to the configuration (Setup) of the DV-II+ Viscometer as well as special functions that can enhance the user's ability to make viscosity measurements.

The Options menu, shown in Table 1, gives a complete picture of the various configuration choices and special functions.

Quick References to Options

Introduction to OPTIONS

TAB

SETUP:

Temperature — °F or °C Units — CGS or SI

* Speed Sets — Sequential, Interleave, Custom

Printer Port — Serial (RS232) or Parallel Data Averaging — Display Only

Table 2

Options Menu

* TIME TO STOP * TIME TO TORQUE

SET PRINT TIME:

Set the Printing Time

PC PROG (ON/OFF):

Enables/Disables Communication of Serial (RS232) Port

* DOWNLOAD A PROGRAM:

Link to PC to Receive a B.E.V.I.S. Program

(B.E.V.I.S. = Brookfield Engineering Viscometer Instruction Set)

* RUN A PROGRAM:

Execute a B.E.V.I.S. Program

*Not available when motor is ON

Pressing OPTIONS/TAB places you into the Options menu at the last option selected. The following keys are active and perform as follows:

UP ARROW - Scrolls up through menu or selects new value from

list.

DOWN ARROW - Scrolls down through menu or selects new value

from list.

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OPTIONS

OPTIONS/TAB - Toggles between options.

TAB

ENTER

ENTER/AUTORANGE - Accepts the currently flashing option and moves

AUTO

RANGE

user to next level (if applicable) of the selected option.

MOTOR ON/OFF

MOTOR ON/OFF/ESCAPE - Cancels current operation and backs user out one

ESCAPE

menu level. Repeated pressing will back the user out to the default screen. While in the Options menu, the

MOTOR ON/OFF/ESCAPE key does not

cause the viscometer motor to turn on or off!

The Options menu screens will appear as shown in Figure 23 if you cycle through the possible options using the

UP/DOWN arrows.

SETUP

TIME TO TORQUE

TIME TO TORQUE SET PRINT TIME

SET PRINT TIME PC PROG OFF

PC PROG OFF DOWNLOAD A PROG

DOWNLOAD A PROG RUN A PROG

SETUP

TIME TO STOP

LTIME TO STOP

SET PRINT TIME

SET PRINT TIME PC PROG ON

LPC PROG ON

DOWNLOAD A PROG

Figure 23

On entry to the Options menu, the following rules regarding current viscometer operation are in force:

1. Printer output will be suppressed when in the Custom Speed option, the Time to Torque and Time to Stop options, the Download A Program and Run A Program options. It will be continued when any other option is selected.

2. If the motor is ON when the user enters the Options menu, choices will be limited to: CGS/SI units (under SETUP), °F/°C units (under SETUP), PRINTING SELECTIONS and PC PROG.

3. The last selected menu option will be flashing.

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Selecting an Option

The following is a quick reference for entering and using the OPTIONS menu:

Press

OPTIONS

TAB

To enter Options Menu

or To scroll to a specific option

For Options:

Press

OPTIONS

TAB

ENTER

AUTO

RANGE

To toggle between the choices available for a specific option when indicated

To select the flashing option

III.2 Setup

From the main Options screen, the user scrolls up or down until the following screen is displayed:

SETUP

TIME TO TORQUE

Figure 24

A press of the ENTER/AUTORANGE key takes you into the Setup sub-menu (Figure 25). As in the main Options menu, you can scroll up or down through the various Setup options. In order to access all options, the motor must be turned off.

Brookfield Engineering Labs., Inc. Page 21 Manual No. M/97-164-F1 102

L°F(FAHRENHEIT)

CGS UNITS

L°C(CENTIGRADE)

CGS UNITS

L°F(FAHRENHEIT)

CGS UNITS

LCGS UNITS

SEQUENTIAL

LSEQUENTIAL

PRINT SERIAL

LPRINT SERIAL

DATA AVERAGING

L°F(FAHRENHEIT)

SI UNITS

LCGS UNITS

INTERLEAVE

LSEQUENTIAL

PRINT PARALLEL

OPTIONS

TAB

Figure 25

LCGS UNITS

CUSTOM SPEEDS

III.2.1 Temperature Display

The DV-II+ viscometer can display temperature in either degrees Centigrade or degrees Fahrenheit. On entry (assuming the viscometer is currently displaying °F) you will be presented with:

L°F(FAHRENHEIT)

CGS UNITS

Figure 26

A press of the OPTIONS/TAB key at this point will “toggle” between the two available temperature scale options as shown in Figure 27:

L°F(FAHRENHEIT)

CGS UNITS

Figure 27

To select the temperature display mode, press the ENTER/AUTORANGE key. You automatically exit the Setup menu with the viscometer displaying temperature in the selected scale. You must press the

ENTER/AUTORANGE key to select the flashing option.

III.2.2 Units of Measurement

Selecting units of measurement is identical to that for temperature described above. The screen display shows:

L°C(CENTIGRADE)

CGS UNITS

Brookfield Engineering Labs., Inc. Page 22 Manual No. M/97-164-F1102

L°F(FAHRENHEIT)

CGS UNITS

Figure 28

A press of the OPTIONS/TAB key at this point allows the user to “toggle” between the two available data display units as shown in Figure 29:

L°F(FAHRENHEIT)

CGS UNITS

Figure 29

L°F(FAHRENHEIT)

SI UNITS

Pressing the ENTER/AUTORANGE key selects the display units, which are flashing, followed by an exit of the Setup menu. You must press the ENTER/AUTORANGE key to select the flashing option.

III.2.3 Motor Speed Set Selection

This selection must be done with the motor off. Scrolling in the Setup options menu to the speed set selection option yields the following screen display:

LCGS UNITS

SEQUENTIAL

Figure 30

The last selected speed set option is displayed, in this case, Sequential. For each press of the

OPTIONS/TAB key, the display shows selectable options (Figure 31). You must press the ENTER/ AUTORANGE key to select the flashing option.

LCGS UNITS

INTERLEAVE

LCGS UNITS

CUSTOM SPEEDS

Figure 31

LCGS UNITS

SEQUENTIAL

The speeds available in each of the above options are listed in Appendix F. The DV-II+ is initially set up with the Sequential Speed Set at Brookfield prior to shipment.

III.2.3.1 LV/RV Speeds

In the case of Sequential or Interleave, a press of the ENTER/AUTORANGE key immediately selects that option and exits the SETUP option menu.

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III.2.3.2 Custom Speeds

Pressing the

ENTER/AUTORANGE key when Custom Speeds is displayed results in the follow-

ing screen display:

.01 °0.0

Figure 32

Fifty-four (54) speeds are available for custom speed set selection (see Appendix F). You are allowed to select up to nineteen (19) of these 54 available speeds. Speed 0.0 is automatically included as one of the nineteen (19) speeds. Selecting a speed (or deleting a speed) is accomplished by pressing the SET SPEED key while the desired speed is blinking. This will cause an asterisk to appear (or to disappear if the speed is being cleared) to the left of the speed. Trying to select more than nineteen (19) speeds will result in a “beep” for each press of the SET SPEED key when over this limit. You may scroll up or down through the speed set in selecting speeds. When done, a press of the

ENTER/AUTORANGE key will take you back to the default screen with the asterisked speeds now

comprising the custom speed set. Regardless of order chosen, speeds will appear in ascending order for run selection, beginning with speed 0.0 RPM.

III.2.4 Printer Output Port

Scrolling to the printer port option presents the following:

LSEQUENTIAL

PRINT SERIAL

Figure 33

LSEQUENTIAL

PRINT PARALLEL

Pressing the OPTIONS/TAB key “toggles” between the two port choices. To select a printer output port, press the ENTER/AUTORANGE key while the desired choice is blinking. This will cause the DV-II+ to direct all further printer output to the chosen port while remaining in the Setup menu. You must press the ENTER/AUTORANGE key to select the flashing option.

III.2.5 Data Averaging

This feature will perform a “rolling” average on the displayed % torque value and all other displayed viscometer data derived from % torque. You are allowed to select the number of readings over which averaging is being done, with ten (10) readings as the maximum. There will be an initial delay as the first average is performed and then no apparent delay as the following readings are averaged (the viscometer takes approximately 4 readings per second). The rolling average is described as follows given the selected reading number ‘X’:

1. The first X readings are collected, placed in the averaging buffer, averaged and displayed.

2. The first reading in the averaging buffer is dropped; the next reading (the X + 1 reading) is placed in the buffer and the buffer is again averaged and displayed.

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Step 2 is repeated indefinitely until the viscometer is shut off or the user selects a different number of readings to average. The number of readings to be averaged will include zero (0) as an average so that this option may effectively be turned off without turning the viscometer off.

Notes: 1. The data averaging will only be applied to the data displayed by the

viscometer. No data averaging will be applied to the torque analog output signal.

2. When data averaging is other than zero (0) or one (1), a flashing A will be displayed to the left of the % Torque sign as shown below.

cP 123.4 20.1C 10 RPM A% 19.7

Figure 34

You must press the ENTER/AUTORANGE key to select the flashing option.

III.3 Time Modes

The Time Modes are provided to allow more flexibility by unattended operating of the viscometer during data gathering. The last selected option (i.e. Time to Torque or Time to Stop) will be highlighted when scrolling to this option as shown in Figure 35:

LSETUP

TIME TO TORQUE

Figure 35

A press of the OPTIONS/TAB key will “toggle” between the two available timed modes as shown in Figure 36:

LSETUP

TIME TO TORQUE

Figure 36

To enter the time for either of these options, press the ENTER/AUTORANGE key while the selected option is blinking. Let’s start with Time To Stop.

Note: These two modes are immediately executed when input is complete.

They do not return to the default screen until running is complete. They can be stopped at any time by a press of the MOTOR ON/OFF/ESCAPE key.

LSETUP

TIME TO STOP

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III.3.1 Time to Stop

On entry, the user is presented with the following screen display:

TIMED STOP SET MIN’S: 00

Figure 37

Note: If a time interval has already been set, the user may skip the time interval

input and go directly to the speed input screen (Figure 39) by pressing the ENTER/AUTORANGE key.

Using the UP and DOWN ARROW keys, the user enters a value for the minutes portion of the time ramp. This value can be as high as 59 minutes. When satisfied, the user presses the

OPTIONS/TAB key again

to enter the seconds setting display:

TIMED STOP SET SEC’S: 00

Figure 38

Using the UP and DOWN ARROW keys, the user enters a value for the seconds portion of the time ramp. This value will be from zero (0 ) up to fifty-nine (59) seconds. Press ENTER to accept the value.

Note: The value for either minutes or seconds must be other than zero or you

cannot advance to the RPM input screen (Figure 39). Pressing the OPTIONS/ TAB or ENTER/AUTORANGE keys will cause the user to alternate between the minutes input screen (Figure 37) and the seconds input screen (Figure

38) until either minutes or seconds are anything but zero.

A press of the the ENTER/AUTORANGE key allows the user to input the RPM selection. At this point, the user will see a screen similar to Figure 39; using the UP and DOWN ARROW keys,

the user sets the speed.

TIMED STOP SELECT RPM:30

Figure 39

After selecting the speed, the user may review the values selected. If the user presses the OPTIONS/ TAB key, you will return to the minutes input screen of Figure 37 where you may change the minute input if so desired. Thereafter, continued pressing of the OPTIONS/TAB key will toggle between the minutes and seconds input screens and the motor input screen. A press of the MOTOR ON/OFF/

ESCAPE key will cancel the timed stop operation and take the user back to the screen of Figure 36.

Pressing the ENTER/AUTORANGE key will cause the DV-II+ to accept the new values.

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That done, the user is presented with the following screen:

TIMED STOP ENTER TO START

Figure 40

At this point the user must press the ENTER/AUTORANGE key to begin the timed stop operation. Any

other key press will be ignored except the and take the user back to the screen of Figure 36 where you will have to begin all over again.

MOTOR ON/OFF/ESCAPE key which will cancel the process

We will assume that the user pressed the

ENTER/AUTORANGE key. You will now be presented with

the following screen for the duration of the timed run:

cP 123.5e6 MIN: 15 SEC: 13

Figure 41

Note: When this mode has begun, a press of the MOTOR ON/OFF/ESCAPE key will

cancel

Also note that data will be displayed in the currently selected method i.e. CGS or SI units. Pressing the SELECT DISPLAY key allows display of alternate data values such as Shear Stress, Shear Rate or Torque.

the Timed Stop sequence and return the user to the screen of Figure 36.

The seconds display will decrement from fifty-nine (59 ) to zero (0) in one (1) second intervals. When seconds reaches zero (0), the minutes value will decrement by one (1) minute. This will continue until all of the time has elapsed at which point the viscometer will display the following screen:

cP 123e6 TIMED STOP DONE

Figure 42

At this point the viscometer will stop the motor and continue to display this screen until any key except the UP or DOWN ARROW key, the PRINT key or the SELECT DISPLAY key is pressed. The user can, while this display is current, press the UP or DOWN ARROW keys to view the torque and speed

that were current at the time the display was frozen. The display would appear as follows:

%=76.4 RPM=100 TIMED STOP DONE

Figure 43

The display will switch between that of Figures 42 and 43 for each press of the UP or DOWN arrow keys. A press of the PRINT screen would send one standard print line to the attached printer for each press of the PRINT key. As stated above, pressing any key (except the UP or DOWN ARROW keys, the PRINT key or the SELECT DISPLAY key) will cause the viscometer to exit the Time To Stop mode and resume operation with the screen of Figure 40 displayed awaiting another Timed Stop run.

The user can press the PRINT key while in either of these two screens (Figures 42 and 43) to send one

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standard print string to the attached printer as many times as the user presses the PRINT key. In addition, the

PRINT key can be pressed during the actual measurement to obtain instantaneous data.

Pressing any other key will exit this mode and return the viscometer to normal operation.

III.3.2 Time to Torque

On entry to this mode, the user is presented with the following screen display:

TIME TO TORQUE SET TORQUE:00%

Figure 44

Using the UP or DOWN ARROW keys, the user enters a value for the torque level that you wish to reach.

Note: The value for torque must be other than zero (0) and less than or equal

to ninety-nine (99) percent or

At this point, the user presses the OPTIONS/TAB key and the screen shown in Figure 45 appears:

you will not

be able to continue.

TIME TO TORQUE SELECT RPM: 30

Figure 45

Using the UP or DOWN ARROW keys, the user selects a speed from the currently selected speed set. If you had opted to use the LVRV sequential or interleaved speed sets, all those speeds would be available by pressing the UP or DOWN ARROW keys. Conversely, if the user had selected a custom speed set, you would be limited to those speeds comprising the custom speed set. After selecting the speed, the user may press any one of three keys to continue: the OPTIONS/TAB key, the MOTOR

ON/OFF/ESCAPE key and the ENTER/AUTORANGE key. If the user presses the OPTIONS/TAB key

you will return to the torque input screen of Figure 44 where you may change the torque input if so desired. Therefore, continued pressing of the OPTIONS/TAB key will toggle between the torque input screens and the motor input screen. A press of the MOTOR ON/OFF/ESCAPE key will cancel the time to torque operation and take the user back to the screen of Figure 35. Finally, pressing the ENTER/

AUTORANGE key will cause the DV-II+ to accept and store in EEPROM the new values (only) for

the torque level and the selected motor speed. That done, the user is presented with the following screen:

TIME TO TORQUE ENTER TO START

Figure 46

At this point the user must press the ENTER/AUTORANGE key to begin the timed stop operation. Any other key press will be ignored except the MOTOR ON/OFF/ESCAPE key which will cancel the process and take the user back to the screen of Figure 44 where you will have to begin all over again.

We will assume that the user pressed the ENTER/AUTORANGE key. You will now be presented with

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a screen similar to Figure 47 for the duration of the timed torque run:

TORQUE = 24.2% MIN: 15 SEC: 13

Figure 47

Note: When this mode has begun, a press of the MOTOR ON/OFF/ESCAPE key will

cancel the time to torque sequence and return the user to the screen of Figure 35.

The seconds display will increment from zero(0) to fifty-nine (59) in one (1) second intervals and the current value of the viscometer torque will be updated continuously. When seconds reaches fiftynine (59), the minutes value will increment by one (1) minute. This will continue until the user

selected torque value is attained at which point the viscometer will display the following screen:

22MIN 54SEC: 85% TIMED TORQ DONE

Figure 48

At this point the viscometer will stop the motor and continue to display this screen until any key (except the UP or DOWN ARROW keys, the PRINT key or SELECT DISPLAY key) is pressed. The user can, while this display is current, press the UP or DOWN ARROW keys to view the viscosity that was current at the time the display was frozen. The display would appear as follows:

cP 123.5e6 TIMED TORQ DONE

Figure 49

The display will switch between that of Figures 48 and 49 for each press of the UP or DOWN ARROW keys. As stated above, pressing any key (except the UP or DOWN ARROW or PRINT keys) will cause the viscometer to exit the Time To Torque mode and resume operation with the screen of Figure 44 displayed awaiting another Timed Torque run.

The user can press the PRINT key while in either of these two screens (Figures 48 and 49) to send one standard print string to the attached printer as many times as the user presses the PRINT key. In addition, the PRINT key can be pressed during the actual measurement to obtain instantaneous data. Pressing any other key will exit this mode and return the viscometer to normal operation.

Note: For both of the methods of Sections III.3.1 and III.3.2 the following apply:

1. For the Timed Stop method, the DV-II+ viscometers will retain the last value for the

time interval so that it will become the default the next time the user elects to use this method.

2. For the Time To Torque method, the DV-II+ viscometers will retain the last entered

torque value for use when next the user elects to perform a time to torque test.

3. The user can set up a desired print interval time, then set the viscometer to the

continuous print mode and finally initiate either of the timed modes of operation. While setting up the timed mode parameters, continuous print operation will cease.

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However, upon starting the timed operation, the DV-II+ will output an initial data string to the printer and then continue printing data strings (at the user defined time interval) for the duration of the timed run. At the end of the timed run, continuous printing will again be disabled and the user may print single strings (of the final data point) at your option until you exit the timed mode. Upon returning to the default

operation mode, continous printing will again resume at the user selected time interval. In a similar manner, if you are in the once-per-PRINT -key-press mode, when you enter the timed mode of operation you will be able to print data strings at any time during the timed mode by pressing the

PRINT key.

III.3.3 Print Time Interval

This option is used to set the print time interval to the selected printer. Scroll to Set Print Time, as shown in Figure 50:

LTIME TO TORQUE

SET PRINT TIME

Figure 50

Press the ENTER/AUTORANGE key. On entry, Figure 51 is displayed:

LPRINT INTERVAL

SET MIN’S: 00

Figure 51

Using the UP and DOWN ARROW keys, enter a value for the minutes between successive print strings. This value can be as high as fifty-nine (59) minutes and as low as 00.

When satisfied, press the OPTIONS/TAB key to enter the seconds setting display:

LPRINT INTERVAL

SET SEC’S: 00

Figure 52

Using the UP and DOWN ARROW keys, enter a value for the seconds portion of the print interval. This value can be between zero (0) and fifty-nine (59 )seconds.

Note: The value for minutes or seconds must be other than zero (0) or you will

print continuously when you exit this mode. A press of the MOTOR ON/ OFF/ESCAPE key would exit this option and take you back to the screen of Figure 50.

Continued pressing of the OPTIONS/TAB key will toggle between the minutes and seconds input screens. Press the ENTER/AUTORANGE key to accept the new values for print interval in minutes and seconds. You will now be in the screen display of Figure 50 where you may re-enter the print interval mode, or exit to the default screen (Figure 7) by pressing the MOTOR ON/OFF/ESCAPE key.

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Activating print selections in the Print mode can only be done by exiting to the main menu and pressing the confirming that you are now in the Print Interval mode. Pressing

PRINT key for four (4) seconds. “P%” will flash in front of the torque reading,

PRINT for one (1) second

thereafter will disable the Print mode and remove the “P%” from the display.

III.3.4 PC Program (On/Off)

This option causes the serial port of the DV-II+ viscometer to go into a high speed output mode (approximately 3 print lines per second) for use with Brookfield WINGATHER® software program. When ON, you may enter the Options menu but will not be allowed to make any option selections until the PC PROG is turned OFF. All front panel keys will function normally when you turn the option ON and return to normal viscometer operation by pressing the MOTOR ON/OFF/ESCAPE key. When OFF, the DV-II+ will return to the last set print time interval when printing is resumed.

From the Options menu, scroll to the screen shown in Figure 53:

SET PRINT TIME PC PROG OFF

Figure 53

Press the OPTIONS/TAB key to display Figure 54:

SET PRINT TIME PC PROG ON

Figure 54

Pressing the OPTIONS/TAB key would return you to the screen display of Figure 53. Repeated pressing of the OPTIONS/TAB key would cause you to toggle back-and-forth between the displays of Figure 53 and Figure 54.

To turn high speed output ON, press the ENTER/AUTORANGE key when the appropriate screen is displayed. Then press the MOTOR ON/OFF/ESCAPE key to exit the Setup mode. This returns you to the default screen display and resumes normal viscometer operation with high speed output enabled and normal printer operation using the last entered print time interval.

Note: For access to B.E.V.I.S. option, PC PROG must be OFF.

III.3.5 Download a Program

Please refer to Section IV for details on how to create a program before proceeding with this section.

In the Options menu, scroll to the screen shown in Figure 55:

PC PROG OFF

DOWNLOAD A PROG

Figure 55

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Refer to Section IV for information on how to create B.E.V.I.S. programs on a PC which can be downloaded to the DV-II+ Programmable Viscometer.

Press the ENTER/AUTORANGE key to download a B.E.V.I.S. program as shown in Figure 56:

LOAD TO SLOT#1

PRESS ENTER KEY

Figure 56

Select a number from one (1) to four (4) using the UP/DOWN ARROW keys assign a storage location for the program to be downloaded.

Note: Remember to keep track of what program is in what slot. If you elect to

download a new program to an active slot, you will overwrite the program currently residing in that slot. The programs are saved automatically when the viscometer is turned off.

After selecting the slot number, press the ENTER/AUTORANGE key and the screen shown in Figure 56 changes as follows: the top line flashes while the bottom line disappears. This flashing screen will be displayed for as long as it takes to download the program. At the end of the download, Figure 57 is displayed:

DOWNLOAD DONE TO EXIT PRESS A KEY

Figure 57

If a PC is not attached, Figure 58 will be displayed:

B.E.V.I.S. ERROR NO PC ATTACHED

Figure 58

A press of any key (except the MOTOR ON/OFF/ESCAPE key) will take the user back a level to Figure 56 where you may elect to download another program or, with a press of the MOTOR ON/OFF/ESCAPE key, return to the screen of Figure 55.

III.3.6 Run a Program

In the Options menu, scroll to the screen shown in Figure 59:

DOWNLOAD A PROG

RUN A PROG

Figure 59

Press the ENTER/AUTORANGE key to run a B.E.V.I.S. program as shown in Figure 60:

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RUN PGM SLOT#1 PRESS ENTER

Figure 60

Using the UP/DOWN ARROWkeys, select one of the four (4) stored programs. Press the ENTER/

AUTORANGE

key. Any attempt to select a program slot that does not contain a program will result in a double beep for each key press. When a valid program slot is selected, the screen in Figure 61 is displayed:

PRINT KEY = LIST ENTER KEY = RUN

Figure 61

At this point, you may elect to print the B.E.V.I.S. program by pressing the PRINT key or start the program immediately by pressing the ENTER/AUTORANGE key (remember: pressing the MOTOR ON/

OFF/ESCAPE key will stop the current operation and bring you back one menu level). You may elect

to print the program, to confirm the slot choice as correct or simply to have it available later when reviewing data. If you elect to print the program, you will return to the screen of Figure 60 after the program is finished printing. Pressing the ENTER/AUTORANGE key exits the screen of Figure 60 and the program will start running.

On program start, the screen could be any of the screens possible when running a B.E.V.I.S. program. A typical screen might be:

USE SPINDLE 31 PRESS A KEY

Figure 62

where the operator is instructed to mount a spindle 31 and then press a key to continue. Or you might see:

SET TEMP TO 100C PRESS A KEY

Figure 63

followed by:

WAIT TEMP 100C P1 S00/12 00:14

Figure 64

Here, the B.E.V.I.S. program is waiting for the temperature to reach one hundred (100) °C before it continues to the next program step. Also displayed is the program number (P1), the step number and the total program steps (S00/12) and the elapsed time since the program (or step) began (00:14). While in this “wait state” you can press the OPTIONS/TAB key to see the viscometer default screen in Figure 65; the PGM will be flashing.

Brookfield Engineering Labs., Inc. Page 33 Manual No. M/97-164-F1 102

CP 123.4 55.1C 10 RPM PGM% 63.7

Figure 65

The DVLOADER Software is used to create, save, print, and down load programs to the DV-II+ Programmable Viscometer. The next section explains how to use the DVLOADER software.

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IV. DVLOADER SOFTWARE

The DVLOADER software is a WINDOWS-based program provided on a 3-1/2" diskette which comes with the Programmable DV-II+ Viscometer.

IV.1 B.E.V.I.S. Overview

DVLOADER utilizes B.E.V.I.S. (Brookfield Engineering Viscometer Instruction Set), a scripting language that allows for the creation of programs to control the Programmable DV-II+ Viscometer. Programs are created on a PC, then loaded into the viscometer using the DVLoader software. Some testing capabilities that are possible include the following:

• Repeatedly run the same test program for quality control purposes.

• Wait for a specific condition before continuing with the test (i.e. a torque value, a tempera-

ture value, a key press, etc.).

• Run the viscometer at any of the speeds in the Custom Speed menu.

• Display messages to the screen or an attached printer to aid the operator.

• An internal clock that keeps time between each printed data line (this time is displayed as the

last parameter on each printed line). This provides a consistent time base for the collected data.

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IV.2 Description of B.E.V.I.S. Commands

Command Code Required Parameter Command Description

WTI Time The program waits at this step until the specified time

(MM:SS) elapses.

WPT % Torque value The program waits at this step until the current % torque

(%) equals the specifed value.

WTP Temperature value The program waits at this step until the current temperature

(°C) equals the specified value.

WKY 16 character (or less) The specified message is displayed on the top line of the DV-

text message II+ display while PRESS A KEY is displayed on the bottom

line of the DV-II+. The program waits at this step until a viscometer key is pressed. While waiting at this step, the viscometer produces a beep every few seconds to remind the operator that a keypress is required to continue. If a print interval was enabled (see SPI) at the time this command is executed, the data print timer continues to count up. If the print interval elapses and a key has not yet been pressed, a line of data displaying the time since the last data print is printed as soon as a key is pressed.

SSN Speed value The DV-II+ begins rotating at the specified speed. This can

(RPM) be any of the speeds listed in the Speed list of the DVLoader

software. These speeds are the same as those listed in the Custom Speeds list in the viscometer’s Options menu.

SPI Time The DV-II+ begins printing data to the selected printer (serial

(MM:SS) or parallel; as selected in the DV-II+ menus) at the rate

specified. MM:SS is minutes:seconds.

SSP Two digit spindle code Calculations of viscosity, shear stress, and shear rate are

performed based on the specified spindle code. This command overrides the spindle currently entered via the keypad on the DV-II+.

STZ N/A Sets the data print timer clock back to zero.

PDN N/A The DV-II+ immediately prints a data string to the selected

printer (serial or parallel; as selected in the DV-II+ menus).

PLN 16 character (or less) The DV-II+ prints the specified message to the selected

text message printer (serial or parallel; as selected in the DV-II+ menus).

By using various combinations of the above commands, programs are created that automatically control the viscometer and collect data (via an attached printer) from the Programmable DV-II+ Viscometer.

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IV.3 Creating a B.E.V.I.S. Program

Start the DVLOADER software by clicking on its associated icon or by using the File|Run option of the Windows 3.1 Program Manager. For Windows 95, click the Start button; select Run; enter the name of the program to execute {dvloader.exe}; then click OK.

The B.E.V.I.S. commands are displayed in a list box on the main screen. This list box displays the commands available for creating programs. Clicking on the Insert button inserts the highlighted command (WTI, as shown in Figure 66) into the selected line in the program grid. Double-clicking on a line in this list box also inserts the command into the grid shown in Figure 67.

The icons to the left of the command descriptions indicate the type of command:

A command to wait for a condition.

Figure 66

A command to set a program parameter.

A command to send information to an attached printer.

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Figure 67 shows the grid where the operator programs are created. It is used to view and edit the B.E.V.I.S. programs. When the software starts, an empty grid appears on the left of the screen. You can choose up to 25 commands for your program. Highlight each command in the list box to the right of this grid, then click on the Insert button to insert that same command into the highlighted line of the grid. This same insertion task can also be accomplished by double-clicking on the appropriate command in the list box to the right.

In the case of a speed command (SSN), the Speeds

list box becomes enabled when the cursor is placed in the parameter column for an SSN command. Click on the down arrow to display a list of available speeds. Click on the desired speed, and it will be inserted into the appropriate parameter column in the program grid. The same applies to the spindle command (SSP).

Figure 67

The buttons shown on the main screen are explained below.

Select the COM (RS-232) port the Programmable DV-II+ viscometer is connected to from the COM Port drop down list.

Click the Open File button to load existing B.E.V.I.S. programs.

Click the Save File button to save the B.E.V.I.S. program displayed in the grid.

Click the Print button to print the B.E.V.I.S. program displayed in the grid.

Click the Insert button to insert the B.E.V.I.S. command selected in the Commands box into the selected row in the program grid.

Brookfield Engineering Labs., Inc. Page 38 Manual No. M/97-164-F1102

Click the Delete button to delete the B.E.V.I.S. command in the selected row of the program grid.

Click the Up button to move the B.E.V.I.S. command in the selected row of the program grid up one row.

Click the Down button to move the B.E.V.I.S. command in the selected row of the program grid down one row.

Click the Clear button to clear the grid of all B.E.V.I.S. commands. Once cleared, the commands cannot be retrieved.

Downloads a B.E.V.I.S. program from the PC to the DV-II+

Exits the DVLOADER software program and returns the user to the WINDOWS Program Manager.

IV.4 Downloading a B.E.V.I.S. Program

Before down loading a B.E.V.I.S. program to the viscometer, ensure the following have been checked:

• The appropriate cable (BEL Part# DVP-80) is connected between the selected COM port of

the PC and the viscometer.

• The DV-II+ motor must be OFF.

• Set PC PROG to “OFF.”

• The Programmable DV-II+ is at the down load screen: OPTIONS|DOWNLOAD A

PROG|LOAD TO SLOT#x where x is slot 1,2,3, or 4. See Section III.6. With the LOAD TO SLOT#x screen displayed, choose a storage slot using the DV-II+

arrow keys then press the ENTER/AUTO RANGE key on the viscometer. If after 5 seconds, the viscometer cannot communicate with the DVLoader program, the B.E.V.I.S. ERROR NO PC ATTACHED message is displayed and a beeping sound is heard. If a connection is established, the Down Load button on the PC software becomes enabled , and the DV-II+ screen displays DOWNLOAD PROG TO STORAGE SLOT #1. Click on this button to down load the displayed program to the DV-II+. When the down load is complete, the DV-II+ displays DOWNLOAD DONE TO EXIT PRESS A KEY.

At this point the program in the DV-II+ can be printed and/or run from the viscometer. Click on this button to exit the DVLOADER software. Note: This is an important final step because it allows the RS232 port to be used for

output from the DV-II+ to a serial printer or PC.

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IV. 5 Example Programs

The following example programs can also be found on the DVLoader disk that was included with the DV-II+ Programmable Viscometer:

Program 1: Pre-shear

Command Command Description Parameter Comments

PLN Print text now Preshearing now print user message SSN Set viscometer speed 50.0 run at 50 RPM

WPT Wait for % torque 90.0 wait unitl 90% torque is reached

PLN Print text now Collecting data print user message

SPI Set print interval 00:10 begin printing data at 10 second

intervals SSN Set viscometer speed 10.0 run at 10 RPM WTI Wait for time interval 01:40 wait at this step for 1 minute and

40 seconds, effectively printing

10 data lines

Program 2: For use with an external temperature controller

Command Command Description Parameter Comments

WTP Wait for temperature 40.0 wait until temperature = 40°C (as

an example, a

Thermosel/Controller can be used

for temperature control) WTI Wait for time interval 05:00 soak time; allow temperature to

settle SSN Set viscometer speed 25.0 run at 25 RPM

SPI Set print interval 00:30 begin printing data at 30 second

intervals WTI Wait for time interval 06:00 wait at this step for 6 minutes,

effectively printing 12 data lines

Program 3: Wait for cure

Command Command Description Parameter Comments

(time to torque measurement)

SSP Set spindle 31 set to a number 31 spindle

SSN Set viscomter speed 100.0 run at 100 RPM

SPI Set print interval 00:05 begin printing data at 5 second

intervals

WPT Wait for % torque 85.0 wait until % torque = 85; a curing

cycle

Program 4: Spring relax

Command Command Description Parameter Comments

WKY Wait for a keypress Wind to 100% tell operator to wind spindle until

100% torque is reached

WPT Wait for % torque 100.0 wait until 100% torque is reached

WKY Wait for a keypress Release spindle tell operator to release the spindle

SPI Set print interval 00:01 begin printing data at 1 second

intervals

WPT Wait for % torque 0.0 wait for spindle to completely

unwind to 0% torque

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Program 5: Variable speed

Command Command Description Parameter Comments

SSN Set viscometer speed 5.0 run at 50 RPM WTI Wait for time interval 00:10 wait for 10 seconds

PDN Print data point now print one data point

SSN Set viscometer speed 10 run at 10 RPM WTI Wait for time interval 00:10 wait for 10 seconds

PDN Print data point now print one data point

SSN Set viscometer speed 20 run at 20 RPM WTI Wait for time interval 00:10 wait for 10 seconds

PDN Print data point now print one data point

SSN Set viscometer speed 50 run at 50 RPM WTI Wait for time interval 00:10 wait for 10 seconds

PDN Print data point now print one data point

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Appendix A - Cone/Plate Viscometer Set-Up

This Cone/Plate version of the DV-II+ uses the same operating instruction procedures as described in this manual. However, the “gap” between the cone and the plate must be verified/adjusted before measurements are made. This is done by moving the plate (built into the sample cup) up towards the cone until the pin in the center of the cone touches the surface of the plate, and then by separating (lowering) the plate 0.0005 inch (0.013mm).

Programmable DV-II+ Cone/Plate Viscometers, S/N 50969 and higher, have an Electronic Gap Setting feature. This feature enables the user to easily find the 0.0005 inch gap setting that was established at Brookfield prior to shipment.

The following information explains how to set the Electronic Gap and verify calibration of the DVII+ Viscometer.

A.1 ELECTRONIC GAP SETTING FEATURES

TOGGLE SWITCH allows you to enable/disable

the Electronic Gap Setting Feature: left position is OFF (disabled), right position is ON (enabled).

PILOT LIGHT is the red (LED) light; when

illuminated, it means the Electronic Setting Function is sensing (enabled).

CONTACT LIGHT is the yellow (LED) light;

when it first turns on, the “hit point” has been found.

SLIDING REFERENCE MARKER is used after

finding the “hit point;” it is the reference for establishing the 0.0005 inch gap.

MICROMETER ADJUSTMENT RING is used to

move the cup up or down in relation to the cone spindle. Turning the ring left (clockwise) lowers the cup; turning it right (counterclockwise) raises the cup. Each line on the ring represents one scale division and is equivalent to 0.0005 inch movement of the plate relative to the cone.

Pilot Light

(red)

Toggle Swtich

Contact Light

(yellow)

Sliding Reference

Adjustment Ring

Marker

Micrometer

Figure A1

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A.2 SETUP

1. Be sure that the Viscometer is securely mounted to the Laboratory Stand, leveled and zeroed with no cone or cup attached and 0% torque is displayed.

Bath

Outlet

Bath Inlet

Cup

Outlet

2. Figure A2 shows a typical water bath setup. Connect the sample cup inlet/outlet ports to the water bath inlet and outlet and set the bath to the desired test temperature. Allow sufficient time for the bath to reach the test temperature.

3. The Viscometer has been supplied with a special cone spindle(s) which contains the Electronic Gap Setting feature. The “CPE” part number designation on the cone verifies the Electronic Gap Setting feature. Note: The “CPE” cone or cup cannot be used with earlier DV-II+ cone/plate Viscometers (below S/N50969) which do not have the electronic gap setting feature.

4. With the motor off, thread the cone spindle by using the spindle wrench to secure the viscometer coupling nut (see Figure A3); gently push up on the coupling nut and hold this securely with the wrench. Thread the cone spindle by hand. Note: Left Hand Threads.

Bath/Circulator

Micrometer Adjustment

Ring

Spindle

Wrench

(CPE) Cone

Figure A2

Coupling Nut

These surfaces

must be clean!

Figure A3

Cup Inlet

Sample

Cup

(CPE-44Y

CPE-44P)

5. Attach the cup, taking care not to hit the cone with the cup (Figure A4).

Do Not hit the

CONE with the CUP!

Figure A4

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A.3 SETTING THE GAP

1. Move the toggle switch to the right; this will turn on (enable) the Gap Setting Feature. The Pilot (red) light will be illuminated.

2. If the contact light (yellow) is illuminated, turn the micrometer adjustment ring clockwise (as you look down on the instrument) until the light is no longer illuminated (see Figure A5).

3. If the yellow contact light is not illuminated, slowly turn the micrometer adjustment ring in small increments (one or two scale divisions) counter-clockwise.

Continue moving the micrometer adjustment ring slowly counter-clockwise until the contact light (yellow) first turns on. THIS IS THE “HIT POINT.”

Moves Away

from Hit Point

(clockwise)

LEFTx

Figure A5

Moves Towards

Hit Point

(counter-clockwise)

RIGHT

4. Adjust the sliding reference marker, right or left, to the closest full scale division mark (see Figure A6).

5. Turn the micrometer adjustment ring one scale division to the left to meet the line on the sliding reference marker. THE YEL-

LOW CONTACT LIGHT SHOULD GO OFF.

6. You have established the gap space needed for measurement. Now turn the toggle switch OFF (left); the red pilot light should go off.

The viscosity of electrically conductive fluids may be affected if readings are taken with the Electronic Gap Setting feature “on”. Be sure to shut the feature “off” before taking readings!

7. Carefully remove the sample cup.

Full Scale

Division Marks

Figure A6

Sliding

Reference

Marker

Notes

1. The cup may be removed and replaced without resetting the gap if the micrometer adjustment ring has not been moved.

2. Remove the spindle from the viscometer when cleaning.

3. Re-establish the hit point every time the spindle is attached/detached.

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A.4 VERIFYING CALIBRATION

1. Determine the appropriate sample volume. Refer to Table A6 to determine the correct sample volume required for the spindle to be utilized.

Table A1

Cone Sample Volume

Part No.

2. Select a Brookfield Viscosity Standard fluid that will give viscosity readings between 10% and 100% of full scale range. Refer to Appendix B for viscosity ranges of cone spindles; ranges listed apply to CPE cones.

Do not use a silicone viscosity standard fluid with a viscosity value greater than 5000 cP with a Cone/Plate. Brookfield offers a complete range of mineral oil viscosity standards suitable for use with Cone/Plates for viscosities above 5,000 cP or shear rates above 500 sec-1; see Table E2 in Appendix E for a list of available fluids.

It is best to use a viscosity standard fluid that will be close to the maximum viscosity for a given cone spindle/speed combination.

CPE-40 0.5 ml CPE-41 2.0 ml CPE-42 1.0 ml CPE-51 0.5 ml CPE-52 0.5 ml

4. Attach the sample cup to the Viscometer and allow sufficient time for the sample, cup and cone to reach temperature equilibrium.

5. Turn the motor on. Set the desired speed(s). Measure the viscosity and record the reading in both % torque and centipoise (cP).

Note: The cone spindle must rotate at least five (5) times before a viscosity reading is taken.

Example: LVDV-II+ Viscometer, Cone

Spindle CPE-42, Brookfield Silicone Viscosity Standard having a viscosity of 9.7 cP at 25°C

At 60 RPM, the full scale viscosity range is

10.0 cP. Thus, the Viscometer reading should be 97% torque and 9.7 cP viscosity ±

0.197 cP. The allowable error (±0.197 cP) is a combination of Viscometer accuracy and fluid tolerance (refer to Interpretation of Calibration Test Results in Appendix E).

3. With the motor off, remove the sample cup and place the viscosity standard fluid into the cup.

6. Verify that the viscosity reading is within the allowable 1% deviation, as explained earlier, for the specific viscosity standard fluid(s) that you are using.

* The CPE designation on the cone

spindle indicates use with Electronic Gap Setting Cone/Plate Viscometers/ Rheometers only.

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Appendix B - Viscosity Ranges

Viscosity ranges shown are for operational speeds 0.1 through 200 rpm.

LV Viscometer with LV spindles #1-4 and RV/HA/HB Viscometers with spindles #1-7

Viscosity Range (cP)

Viscometer Minimum Maximum

LVDV-II+ 15 6,000,000 RVDV-II+ 100 40,000,000 HADV-II+ 200 80,000,000 HBDV-II+ 800 320,000,000

Small Sample Adapter and Thermosel

SSA and Viscosity (cP) Shear

Thermosel Rate

Spindle LVDV-II+ RVDV-II+ HADV-II+ HBDV-II+ sec-1

SC4-14 58.6 - 1,171.00 625 - 12,500,000 1,250 - 25,000,000 5,000 - 100,000,000 .40N

SC4-15 23.4 - 468,650 250 - 5,000,000 500 - 10,000,000 2,000 - 40,000,000 .48N

SC4-16 60 - 1,199,700 640 - 12,800,000 1,280 - 25,600,000 5,120 - 102,400,000 .29N SC4-18 1,5 - 30,000 16 - 320,000 32 - 640,000 128 - 2,560,000 1.32N SC4-21 2.4 - 46,865 25 - 500,000 50 - 1,000,000 200 - 4,000,000 .93N SC4-25 240 - 4,790,000 2,560 - 51,200,000 5,120 - 102,400,000 20,480 - 409,600,000 .22N SC4-27 11.7 - 234,325 125 - 2,500,000 250 - 5,000,000 1,000 - 20,000,000 .34N SC4-28 23.4 - 468,650 250 - 5,000,000 500 - 10,000,000 2,000 - 40,000,000 .28N SC4-29 46.9 - 937,300 500 - 10,000,000 1,000 - 20,000,000 4,000 - 80,000,000 .25N SC4-31 15 - 300,000 160 - 3,200,000 320 - 6,400,000 1,280 - 25,600,000 .34N SC4-34 30 - 600,000 320 - 6,400,000 640 - 12,800,000 2,560 - 51,200,000 .28N

This spindle used with Small Sample Adapter only

N represents speed in RPM. For example, spindle SC4-14 operated at 5 rpm has a shear rate of 0.40 x 5 = 2.0 sec

-1

Range and spindle constant information for spindles 82 and 83 are listed on Brookfield Technical Sheet T95-954. Consult Brookfield or your Brookfield dealer for information on spindles 81 and 37.

UL Adapter

Viscosity (cP)

UL Spindle LVDV-II+ RVDV-II+ HADV-II+ HBDV-II+ sec-1

YULA-15 or 15Z 1 - 2,000 3.2 - 2,000 6.4 - 2,000 25.6 - 2,000 1.22N

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Shear

Rate

DIN Adapter Accessory

Viscosity (cP)

DAA Spindle LVDV-II+ RVDV-II+ HADV-II+ HBDV-II+ sec-1

85 0.6 - 5,000 6.1 - 5,000 12.2 - 5,000 48.8 - 5,000 1.22N 86 1.8 - 10,000 18.2 - 10,000 36.5 - 10,000 146 - 10,000 1.29N 87 5.7 - 50,000 61 - 50,000 121 - 50,000 485 - 50,000 1.29N

Spiral Adapter

Viscosity (cP)

Spiral Rate

Spindle LVDV-II+ RVDV-II+ HADV-II+ HBDV-II+ sec-1

SA-70 98 - 98,500 1,050-1,050,000 2,100-2,100,000 8,400 - 8,400,000 .00677 -

Cone/Plate Viscometer

Viscosity (cP)

Cone Spindle LVDV-II+ RVDV-II+ HADV-II+ HBDV-II+ sec

CPE-40 .15 - 3,065 1.7 - 32,700 3.3 - 65,400 13.1 - 261,000 7.5N CPE-41 .58 - 11,510 6.2 - 122,800 12.3 - 245,600 49.1 - 982,400 2.0N CPE-42 .3 - 6,000 3.2 - 64,000 6.4 - 128,000 25.6 - 512,000 3.84N CPE-51 2.4 - 47,990 25.6 - 512,000 51.2 -1,024,000 205 - 4,096,000 3.84N CPE-52 4.6 - 92,130 49.2 - 983,000 98.3 -1,966,000 393 - 7,864,000 2.0N

Shear

Rate

Shear

.67.7N

(1-100 RPM

Shear

Rate

-1

)

Helipath with T-Bar Spindle

Viscosity (cP)

T-Bar Spindle LVDV-II+ RVDV-II+ HADV-II+ HBDV-II+

T-A 156 - 187,460 2,000 - 2,000,000 4,000 - 4,000,000 16,000 - 16,000,000 T-B 312 - 374,920 4,000 - 4,000,000 8,000 - 8,000,000 32,000 - 32,000,000 T-C 780 - 937,300 10,000 - 10,000,000 20,000 - 20,000,000 80,000 - 80,000,000 T-D 1,560 -1,874,600 20,000 - 20,000,000 40,000- 40,000,000 160,000 - 160,000,000 T-E 3,900 -4,686,500 50,000 - 50,000,000 100,000 -100,000,000 400,000 - 400,000,000 T-F 7,800 -9,373,000 100,000 -100,000,000 200,000-200,000,000 800,000 - 800,000,000

In taking viscosity measurements with the DV-II+ Viscometer there are two considerations which pertain to the low viscosity limit of effective measurement.

1) Viscosity measurements should be accepted within the equivalent % Torque Range from 10% to 100% for any combination of spindle/speed rotation.

2) Viscosity measurements should be taken under laminar flow conditions, not under turbulent flow conditions.

The first consideration has to do with the precision of the instrument. All DV-II+ Viscometers have a full scale range precision of (+/-) 1% of any spindle/speed rotation. We discourage taking readings below 10% of range because the potential viscosity error of (+/-) 1% is a relatively high number compared to the instrument reading.

Brookfield Engineering Labs., Inc. Page 47 Manual No. M/97-164-F1 102

The second consideration involves the mechanics of fluid flow. All rheological measurements of fluid flow properties should be made under laminar flow conditions. Laminar flow is flow wherein all particle movement is in layers directed by the shearing force. For rotational systems, this means all fluid movement must be circumferential. When the inertial forces on the fluid become too great, the fluid can break into turbulent flow wherein the movement of fluid particles becomes random and the flow can not be analyzed with standard math models. This turbulence creates a falsely high Viscometer reading with the degree of non-linear increase in reading being directly related to the degree of turbulence in the fluid.

For the following geometries, we have found that an approximate transition point to turbulent flow occurs:

1) No. 1 LV Spindle: 15 cP at 60 RPM

2) No. 1 RV Spindle: 100 cP at 50 RPM

3) UL Adapter: 0.85 cP at 60 RPM

Turbulent conditions will exist in these situations whenever the RPM/cP ratio exceeds the values listed above.

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Appendix C - Variables in Viscosity Measurements

As with any instrument measurement, there are variables that can affect a Viscometer measurement. These variables may be related to the instrument (Viscometer), or the test fluid. Variables related to the test fluid deal with the rheological properties of the fluid, while instrument variables would include the Viscometer design and the spindle geometry system utilized.

Rheological Properties

Fluids have different rheological characteristics that can be described by Viscometer measurements. We can then work with these fluids to suit our lab or process conditions.

There are two categories of fluids:

Newtonian - These fluids have the same viscosity at different Shear Rates (different

RPMs) and are called Newtonian over the Shear Rate range they are measured.

Non-Newtonian - These fluids have different viscosities at different shear rates (different

RPMs). They fall into two groups:

1) Time Independent non-Newtonian

2) Time Dependent non-Newtonian

The time dependency is the time they are held at a given Shear Rate (RPM). They are non-Newtonian, and when you change the Viscometer spindle speed, you get a different viscosity.

Time Independent

Pseudoplastic - A pseudoplastic material displays a decrease in viscosity with an increase in

shear rate, and is also known as “shear thinning”. If you take Viscometer readings from a low to a high RPM and then back to the low RPM, and the readings fall upon themselves, the material is time independent pseudoplastic and shear thinning.

Time Dependent

Thixotropic - A thixotropic material has decreasing viscosity under constant shear rate. If

you set a Viscometer at a constant speed recording cP values over time and find that the cP values decrease with time, the material is thixotropic.

Brookfield publication, “More Solutions to Sticky Problems” includes a more detailed discussion of rheological properties and non-Newtonian behavior.

Viscometer Related Variables

Most fluid viscosities are found to be non-Newtonian. They are dependent on Shear Rate and the spindle geometry conditions. The specifications of the Viscometer spindle and chamber geometry will affect the viscosity readings. If one reading is taken at 2.5 rpm, and a second at 50 rpm, the two cP values produced will be different because the readings were made at different shear rates. The faster the spindle speed, the higher the shear rate.

The shear rate of a given measurement is determined by: the rotational speed of the spindle, the size and shape of the spindle, the size and shape of the container used and therefore the distance between the

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container wall and the spindle surface. A repeatable viscosity test should control or specify the following:

1) Test temperature

2) Sample container size (or spindle/chamber geometry)

3) Sample volume

4) Viscometer model

5) Spindle used

6) Whether or not to attach the guard leg

7) Test speed or speeds (or the shear rate)

8) Length of time or number of spindle revolutions to record viscosity.

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Appendix D - Spindle and Model Codes

Each spindle has a two digit entry code which is entered via the keypad on the DV-II+. The entry code allows the DV-II+ to calculate Viscosity, Shear Rate and Shear Stress values.

Each spindle has two constants which are used in these calculations. The Spindle Multiplier Constant (SMC) used for viscosity and shear stress calculations, and the Shear Rate Constant (SRC), used for shear rate and shear stress calculations. Note that where SRC = 0, no shear rate/shear stress calculations are done and the data displayed is zero (0) for these functions.

Table D1

SPINDLE ENTRY CODE SMC SRC

RV1 01 1 0 RV2 02 4 0 RV3 03 10 0 RV4 04 20 0 RV5 05 40 0 RV6 06 100 0 RV7 07 400 0 HA1 01 1 0 HA2 02 4 0 HA3 03 10 0 HA4 04 20 0 HA5 05 40 0 HA6 06 100 0 HA7 07 400 0 HB1 01 1 0 HB2 02 4 0 HB3 03 10 0 HB4 04 20 0 HB5 05 40 0 HB6 06 100 0 HB7 07 400 0 LV1 61 6.4 0 LV2 62 32 0 LV3 63 128 0 LV4 64 640 0 LV5 65 1280 0 Spiral 70 105 0.677 T-A 91 20 0 T-B 92 40 0 T-C 93 100 0 T-D 94 200 0 T-E 95 500 0 T-F 96 1000 0 ULA 00 0.64 1.223 DIN-81 81 3.7 1.29 DIN-82 82 3.75 1.29 DIN-83 83 12.09 1.29 DIN-85 85 1.22 1.29 DIN-86 86 3.65 1.29 DIN-87 87 12.13 1.29

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Table D1 (continued)

SC4-14 14 125 0.4 SC4-15 15 50 0.48 SC4-16 16 128 0.2929 SC4-18 18 3.2 1.32 SC4-21 21 5 0.93 SC4-25 25 512 0.22 SC4-27 27 25 0.34 SC4-28 28 50 0.28 SC4-29 29 100 0.25 SC4-31 31 32 0.34 SC4-34 34 64 0.28 SC4-37 37 25 0.36 CPE-40 40 0.327 7.5 CPE-41 41 1.228 2 CPE-42 42 0.64 3.8 CPE-51 51 5.12 3.84 CPE-52 52 9.83 2 V-71 71 2.62 NA V-72 72 11.10 NA V-73 73 53.50 NA

Table D2 lists the model codes and spring torque constants for each Viscometer model.

Table D2

MODEL CODE

MODEL TK

ON DV-II+ SCREEN

LVDV-II+ 0.09373 LV

2.5LVDV-II+ 0.2343 2.5 LV 5LVDV-II+ 0.4686 5 LV 1/4 RVDV-II+ 0.25 1/4 RV 1/2 RVDV-II+ 0.5 1/2 RV RVDV-II+ 1 RV HADV-II+ 2 HA 2HADV-II+ 4 2 HA

2.5HADV-II+ 5 2.5 HA HBDV-II+ 8 HB 2HBDV-II+ 16 2 HB

2.5HBDV-II+ 20 2.5 HB 5HBDV-II+ 40 5 HB

Brookfield Engineering Labs., Inc. Page 52 Manual No. M/97-164-F1102

The full scale viscosity range for any DV-II+ model and spindle may be calculated using the equation:

Full Scale Viscosity Range [cP] = TK * SMC

where:

TK = DV-II+ Torque Constant from Table D2 SMC = Spindle Multiplier Constant from Table D1

The Shear Rate calculation is:

Shear Rate (1/

) = SRC * RPM

Sec

where:

SRC = Shear Rate Constant from Table D1

10,000

RPM

Brookfield Engineering Labs., Inc. Page 53 Manual No. M/97-164-F1 102

Appendix E - Calibration Procedures

The accuracy of the DV-II+ is verified using viscosity standard fluids which are available from Brookfield Engineering Laboratories or your local Brookfield agent. Viscosity standards are Newtonian, and therefore, have the same viscosity regardless of spindle speed (or shear rate). Viscosity standards,

calibrated at 25°C, are shown in Table E1 (Silicone Oils) and Table E2 (Mineral Oils).

Container size: For Viscosity Standards < 30,000 cP, use a 600 ml Low Form Griffin Beaker

having a working volume of 500 ml.

For Viscosity Standards Inside Diameter: 3.25"(8.25cm)

Height: 4.75"(12.1cm) Note: Container may be larger, but may not be smaller.

Temperature: As stated on the fluid standard label: ( Conditions: The DV-I+ should be set according to the operating instructions. The water bath

must be stabilized at test temperature. Viscometers with the letters “LV” or “RV” in the model designation must have the guard leg attached (see page 34 for

more information on the guard leg).

Normal 25°C Standard Fluids High Temperature Standard Fluids

Viscosity (cP) Viscosity (cP) Three Viscosity/Temperatures**

5 5,000 HT-30,000 10 12,500 HT-60,000 50 30,000 HT-100,000

100 60,000 500 100,000 **25

1,000 Refer to Brookfield catalog for

≥ 30,000 cP, use the fluid container.

+/-) 0.1°C

C, 93.3°C, 149°C

more information.

Table E1

MINERAL OIL VISCOSITY STANDARD FLUIDS

BEL Part No. Viscosity (cP) 25°C

B31 31 B210 210 B750 750 B1400 1,400 B2000 2,000

Brookfield Engineering Labs., Inc. Page 54 Manual No. M/97-164-F1102

B11000 11,000 B20000 20,000 B80000 80,000 B200000 200,000 B420000 420,000

Table E2

Brookfield Viscosity Standard Fluid General Information

We recommend that Brookfield Viscosity Standard Fluids be replaced on an annual basis, one year from date of initial use. These fluids are pure silicone and are not subject to change over time. However, exposure to outside contaminants through normal use requires replacement on an annual basis. Contamination may occur by the introduction of solvent, standard of different viscosity or other foreign material.

Viscosity Standard Fluids may be stored under normal laboratory conditions. Disposal should be in accordance with state, local and federal regulations as specified on the material safety data sheet.

Brookfield Engineering Laboratories does not recertify Viscosity Standard Fluids. We will issue duplicate copies of the Certificate of Calibration for any fluid within two years of the purchase date.Brookfield Viscosity Standard Fluids are reusable provided they are not contaminated. Normal practice for usage in a 600 ml beaker is to return the material from the beaker back into the bottle. When using smaller volumes in accessories such as Small Sample Adapter, UL Adapter or

Thermosel, the fluid is normally discarded.

Calibration Procedure for LV(#1-4) and RV,HA,HB(#1-7) Brookfield Spindles

1) Place the viscosity standard fluid (in the proper container) into the water bath.

2) Lower the DV-II+ into measurement position (with guard leg if LV or RV series Viscometer is used).

3) Attach the spindle to the Viscometer. If you are using a disk-shaped spindle, avoid trapping air bubbles beneath the disk by first immersing the spindle at an angle, and then connecting it to the Viscometer.

4) The viscosity standard fluid, together with the spindle, should be immersed in the bath for a minimum of 1 hour, stirring the fluid periodically, prior to taking measurements.

5) After 1 hour, check the temperature of the viscosity standard fluid with an accurate thermometer.

6) If the fluid is at test temperature (±0.1°C of the specified temperature, normally 25°C), measure the viscosity and record the Viscometer reading.

(5) times before readings are taken.

Note: The spindle must rotate at least five

7) The viscosity reading should equal the cP value on the fluid standard to within the combined accuracies of the Viscometer and the viscosity standard (as discussed in the section entitled, Interpretation of Calibration Test Results) which appears later in this section.

Calibration Procedure for a Small Sample Adapter

When a Small Sample Adapter is used, the water jacket is connected to the water bath and the water is stabilized at the proper temperature:

1) Put the proper amount of viscosity standard fluid into the sample chamber. The amount varies with each spindle/chamber combination. (Refer to the Small Sample Adapter instruction manual).

2) Place the sample chamber into the water jacket.

3) Put the spindle into the test fluid and attach the extension link, coupling nut and free hanging spindle (or directly attach the solid shaft spindle) to the DV-II+.

Brookfield Engineering Labs., Inc. Page 55 Manual No. M/97-164-F1 102

4) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test temperature.

5) Measure the viscosity and record the Viscometer reading.

least five (5) times before readings are taken.

Calibration Procedure for a Thermosel System

Note: The spindle must rotate at

When a Thermosel System is used, the controller stabilizes the Thermo Container at the test temperature.

1) Put the proper amount of HT viscosity standard fluid into the HT-2 sample chamber. The amount varies with the spindle used. (Refer to the Thermosel instruction manual).

2) Place the sample chamber into the Thermo Container.

3) Put the spindle into the test fluid and attach the extension link, coupling nut and free hanging spindle (or directly attach the solid shaft spindle) to the DV-II+.

4) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test temperature.

5) Measure the viscosity and record the Viscometer reading.

least five (5) times before readings are taken.

Calibration Procedure using UL or DIN UL Adapters

Note: The spindle must rotate at

When a UL or DIN UL Adapter is used, the water bath is stabilized at the proper temperature:

1) Put the proper amount of viscosity standard fluid into the UL Tube. (Refer to the UL Adapter instruction manual).

2) Attach the spindle (with extension link and coupling nut) onto the DV-II+.

3) Attach the tube to the mounting channel.

4) Lower the tube into the water bath reservoir, or if using the ULA-40Y water jacket, connect the inlet/outlets to the bath external circulating pump.

5) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test temperature.

6) Measure the viscosity and record the Viscometer reading.

least five (5) times before readings are taken.

Note: The spindle must rotate at

Calibration Procedure using a Helipath Stand and T-Bar Spindles

When a Helipath Stand and T-Bar spindles are used:

1) Remove the T-bar spindle and select a standard LV(#1-4) or RV,HA,HB(#1-7) spindle. Follow the procedures for LV(#1-4) and RV,HA,HB(#1-7) Brookfield spindles outlined above.

2) T-Bar spindles should not be used for verifying calibration of the DV-II+ Viscometer.

Calibration Procedure for Spiral Adapter

1) Place the viscosity standard fluid (in the proper container) into the water bath.

2) Attach the spindle to the viscometer. Attach chamber (SA-1Y) and clamp to the viscometer.

3) Lower the DV-II+ into measurement position. Operate the viscometer at 50 or 60 RPM until the chamber is fully flooded.

Brookfield Engineering Labs., Inc. Page 56 Manual No. M/97-164-F1102

4) The viscosity standard fluid, together with the spindle, should be immersed in the bath for a

minimum of 1 hour, stirring the fluid periodically (operate at 50 or 60 RPM periodically), prior to taking measurements.

5) After 1 hour, check the temperature of the viscosity standard fluid with an accurate thermometer.

6) If the fluid is at test temperature (+/- 0.1°C of the specified temperature, normally 25°C),

measure the viscosity and record the viscometer reading.

at least five (5) times for one minute, whichever is greater before readings are taken.

Note: The spindle must rotate

7) The viscosity reading should equal the cP value on the viscosity fluid standard to within the

combined accuracies of the viscometer and the standard (as discussed in the section entitled, Interpretation of Calibration Test Results).

Calibration Procedure for Cone/Plate Viscometers:

1) Follow the above procedures for mechanically adjusting the setting of the cone spindle to the

plate.

2) Refer to Appendix A, Table A1, and determine the correct sample volume required for the

selected spindle.

3) Select a viscosity standard fluid that will give viscosity readings between 10% and 100% of full

scale range. Refer to Appendix B for viscosity ranges of cone spindles. Consult with Brookfield or an authorized dealer to determine which fluid is appropriate.

It is best to use a viscosity standard fluid that will be close to the maximum viscosity for a given cone spindle/speed combination.

Example: LVDV-II

+ Viscometer, Cone CP-42, Fluid 10

Having a viscosity of 9.7 cP at 25°C

At 60 RPM, the full scale viscosity range is 10.0 cP. Thus, the Viscometer reading should be 97% torque and 9.7 cP viscosity ± 0.197 cP (0.1 cP for the viscometer plus 0.97 cP for the fluid). The accuracy is a combination of Viscometer and fluid tolerance (refer to Interpretation of Calibration Test Results).

4) With the viscometer stopped, remove the sample cup and place the viscosity standard fluid into

the cup, waiting 10 minutes for temperature equilibrium.

5) Connect the sample cup to the Viscometer. Allow sufficient time for temperature to reach

equilibrium. Typically 15 minutes is the maximum time that you must wait. Less time is required if spindle and cup are already at test temperature.

6) Measure the viscosity and record the Viscometer reading in both % torque and centipoise (cP).

Notes: 1) The spindle must rotate at least five (5) times before a viscosity reading is taken.

2) The use of Brookfield Viscosity Standard fluids in the range of 5 cP to 5000 cP is recommended for cone/plate instruments. Please contact Brookfield Engineering Laboratories or an authorized dealer if your calibration procedure requires more viscous standards.

3) Select a viscosity standard fluid that will give viscosity readings between 10% and 100% of full scale range. Refer to Appendix B for viscosity ranges of cone spindles. Do not use a silicone viscosity standard fluid with a viscosity value

greater than 5000 cP with a Cone/Plate Viscometer. Brookfield offers a complete range of mineral oil viscosity standards suitable for use with Cone/Plate Viscometers as shown in Table E2. Consult with Brookfield or an authorized dealer to determine which fluid is appropriate.

Brookfield Engineering Labs., Inc. Page 57 Manual No. M/97-164-F1 102

Interpretation of Calibration Test Results:

When verifying the calibration of the DV-II+, the instrument and viscosity standard fluid error must be combined to calculate the total allowable error.

The DV-II+ is accurate to (+/-) 1% of any full scale spindle/speed viscosity range. Brookfield Viscosity Standards Fluids are accurate to (+/-) 1% of their stated value.

Example: Calculate the acceptable range of viscosity using RVDV-II+ with RV-3 Spindle

at 2 RPM; Brookfield Standard Fluid 12,500 with a viscosity of 12,257 cP at 25°C:

1) Calculate full scale viscosity range using the equation:

Full Scale Viscosity Range [cP] = TK * SMC

10,000

RPM

Where:

TK = 1.0 from Table D2 SMC = 10 from Table D1

Full Scale Viscosity Range = 50,000 cP

1 * 10 * 10,000

The viscosity is accurate to (+/-) 500 cP (which is 1% of 50,000)

2) The viscosity standard fluid is 12,257 cP. Its accuracy is (+/-)1% of 12,257 or (+/-)122.57 cP.

3) Total allowable error is (122.57 + 500) cP = (+/-) 622.57 cP.

4) Therefore, any viscosity reading between 11,634.4 and 12,879.6 cP indicates that the Viscometer is operating correctly. Any reading outside these limits may indicate a Viscometer problem. Contact the Brookfield technical sales department or your local Brookfield dealer/distributor with test results to determine the nature of the problem.

The Brookfield Guardleg

The guard leg was originally designed to protect the spindle during use. The first applications of the Brookfield Viscometer included hand held operation while measuring fluids in a 55-gallon drum. It is clear that under those conditions the potential for damage to the spindle was great. Original construction included a sleeve that protected the spindle from side impact. Early RV guard legs attached to the dial housing and LV guard legs attached to the bottom of the pivot cup with a twist and lock mechanism.

The current guard leg is a band of metal in the shape of the letter U with a bracket at the top that attaches to the pivot cup of a Brookfield Viscometer/Rheometer. Because it must attach to the pivot cup, the guard leg cannot be used with a Cone/Plate instrument. A guard leg is supplied with all LV and RV series instruments, but not with the HA or HB series. It’s shape (shown in Figure 1) is designed to accommodate the spindles of the appropriate spindle set; therefore, the RV guard leg is wider than the LV due to the large diameter of the RV #1 spindle. They are not interchangeable.

Brookfield Engineering Labs., Inc. Page 58 Manual No. M/97-164-F1102

The calibration of the Brookfield Viscometer/Rheometer is determined using a 600 ml Low Form Griffin Beaker. The calibration of LV and RV series instruments includes the guard leg. The beaker wall (for HA/HB instruments) or the guard leg (for LV/RV instruments) define what is called the "outer boundary" of the measurement. The spindle factors for the LV, RV, and HA/HB spindles were developed with the above boundary conditions. The spindle factors are used to convert the instrument torque (expressed as the dial reading or %Torque value) into centipoise. Theoretically, if measurements are made with different boundary conditions, e.g., without the guard leg or in a container other than 600 ml beaker, then the spindle factors found on the Factor Finder cannot be used to accurately calculate an absolute viscosity. Changing the boundary conditions does not change the viscosity of the fluid, but it does change how the instrument torque is converted to centipoise. Without changing the spindle factor to suit the new boundary conditions, the calculation from instrument torque to viscosity will be incorrect.

Practically speaking, the guard leg has the greatest effect when used with the #1 & #2 spindles of the LV and RV spindle sets (Note: RV/HA/HB #1 spindle is not included in standard spindle set). Any other LV (#3 & #4) or RV (#3 - #7) spindle can be used in a 600 ml beaker with or without the guard leg to produce correct results. The HA and HB series Viscometers/Rheometers are not supplied with guard legs in order to reduce the potential problems when measuring high viscosity materials. HA/HB spindles #3 through #7 are identical to those spindle numbers in the RV spindle set. The HA/HB #1 & #2 have slightly different dimensions than the corresponding RV spindles. This dimen-

RV Guardleg

LV Guardleg

sional difference allows the factors between the RV and HA/ HB #1 spindles to follow the same ratios as the instrument torque even though the boundary conditions are different.

The recommended procedures of using a 600 ml beaker and the guard leg are difficult for some customers to follow. The guard leg is one more item to clean. In some applications the 500 ml of test fluid required to immerse the spindles in a 600 ml beaker is not available. In practice, a smaller vessel may be used and the guard leg is removed. The Brookfield Viscometer/Rheometer will produce an accurate and repeatable torque reading under any measurement circumstance. However, the conversion of this torque reading to centipoise will only be correct if the factor used was developed for those specific conditions. Brookfield has outlined a method for recalibrating a Brookfield Viscometer/Rheometer to any measurement circumstance in More Solutions to Sticky Problems, Section 3.3.10. It is important to note that for

Brookfield Engineering Labs., Inc. Page 59 Manual No. M/97-164-F1 102

many viscometer users the true viscosity is not as important as a repeatable day to day value. This repeatable value can be obtained without any special effort for any measurement circumstance. But, it should be known that this type of torque reading will not convert into a correct centipoise value when using a Brookfield factor if the boundary conditions are not those specified by Brookfield.

The guard leg is a part of the calibration check of the Brookfield LV and RV series Viscometer/ Rheometer. Our customers should be aware of its existence, its purpose and the effect that it may have on data. With this knowledge, the viscometer user may make modifications to the recommended method of operation to suit their needs.

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Appendix F - Speed Sets

The following speed sets and custom speeds are selectable from the SETUP menu option. All speeds are in units of RPM.

0.0

0.3

0.5

0.6

1.0

1.5

2.0

2.5

3.0

4.0

5.0

6.0

10.0

12.0

20.0

30.0

50.0

60.0

100.0

Interleave

FromSpeed

LVT

RVT

LVT

RVT

LVT RVF RVT

LVT RVT

Sequential

Speed From

0.0

0.3

0.6

1.5

3.0

6.0

12.0

30.0

60.0

0.0

0.5

1.0

2.0

2.5

4.0

5.0

10.0

20.0

50.0

100.0

LVT LVT LVT LVT LVT LVT LVT LVT

RVT RVT RVF RVT RVF RVT RVT RVT RVT RVT

0.0

0.01

0.03

0.05

0.07

0.09

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.4

1.5

1.8

2.0

2.5

Custom

SpeedSpeed

3.0

4.0

5.0

6.0

7.5

8.0

10.0

12.0

15.0

17.0

20.0

22.0

25.0

30.0

35.0

40.0

45.0

50.0

60.0

70.0

75.0

80.0

90.0

Speed

100.0

105.0

120.0

135.0

140.0

150.0

160.0

180.0

200.0

The DV-II+ has the sequential speed set installed at Brookfield prior to shipment.

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The DV-II+ can be programmed to select up to 18 of the above speeds for use at any one time. Speed 0.0 is automatically included as the 19th speed.

Appendix G - Communications

When using the Brookfield Computer Cable (Brookfield part # DVP-80), the DV-II+ will output a data string at a rate of approximately 3 times per second. When using the Brookfield Printer Cable (Brookfield Part No. DVP-81), the output rate is 1.0 times per second. The DV-II+ uses the following RS-232 parameters to output these strings:

Baud Rate 9600 Data Bits 8 Stop Bits 1 Parity None Handshake None

The following formulas should be used to calculate and display the Viscometer data after each packet of data is obtained from the DV-II+.

Viscosity (cP) = 100 * TK * SMC * Torque

RPM

Shear Rate (1/ Shear Stress (

)=RPM * SRC

Sec

Dynes

)=TK * SMC * SRC * Torque

Where:

RPM = Current Viscometer spindle speed in RPM TK = Viscometer torque constant from Appendix D, Table D2. SMC = Current spindle multiplier constant from Appendix D, Table D1. SRC = Current spindle shear rate constant from Appendix D, Table D1. Torque = Current Viscometer torque (%) expressed as a number between 0 and 100.

As an example, consider an LV Viscometer using an SC4-31 spindle, running at 30 RPM and currently displaying a Torque of 62.3 (%). First we list all of the given data and include model and spindle constants from Appendix D, Tables D1 and D2:

RPM = 30 from the example statement. TK = 0.09373 from Appendix D for an LV Viscometer. SMC = 32.0 from Appendix D for a type SC4-31 spindle. SRC = 0.34 from Appendix D for a type SC4-31 spindle. Torque = 62.3 from the example statement.

Applying this data to the above equations yields:

Viscosity (cP) = 100 * TK * SMC * Torque

RPM

= 100 * 0.09373 * 32.0 * 62.3

= 622.9 cP

Shear Rate (1/

)=RPM * SRC

Sec

= 30 * 0.34 = 10.2 1/

Brookfield Engineering Labs., Inc. Page 62 Manual No. M/97-164-F1102

Sec

Shear Stress (

Dynes

)=TK * SMC * SRC * Torque

= 0.09373 * 32.0 * 0.34 * 62.3 = 63.5

Dynes

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No Connection

Transmit Data (TxD)

High Speed Print (Note 1)

Serial Ground

DV-II+

Serial and Analog Outputs

Analog Ground

Analog % Torque (Note 2)

Analog Temperature (Note 3)

High Speed Print (Note 1)

Notes:

Figure G1

1. Placing a jumper across pins 4 and 9 causes the DV-II+ to output printer data at a 3 line-per-second rate. No jumper across pins 4 and 9 retains the once-per-second printer output rate.

2. This is a 0-1 volt d.c. output where 0 volts corresponds to 0% torque and 1 volt corresponds to 100 % torque with a resolution of 1 millivolt (0.1%).

3. This is a 0-3.75 volt d.c. output where 0 volts corresponds to -100°C and

3.75 volts corresponds to +275°C with a resolution of 1 millivolt (0.1°C).

Analog Output:

The analog outputs for temperature and % torque are accessed from the 9-pin connector located on the rear panel of the DV-II+. The pin connections are shown in Figure G1.

The output cable (Part No. DVP-96Y) connections are:

Red Wire: Temperature Output

Black Wire: Temperature Ground

White Wire: % Torque Output

Green Wire: % Torque Ground

Note: Please contact Brookfield Engineering Laboratories or your local dealer/

distributor for purchase of the DVP-96Y analog output cable.

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Appendix H - Model S Laboratory Stand

VS-35Y

MODEL S

CLAMP ASSEMBLY

BROOKFIELD LABORATORY VISCOMETER

VS-17SY

MODEL S-E

CLAMP ASSEMBLY

(EXPLOSION-PROOF)

EXPLOSION-PROOF CLAMP VS-17Y PARTS

ITEM PART #

VS-34

VS-38

VS-2

VS-3

50S311824S06B

502020032S34Z

VS-35

VS-40Y

VS-41Y

VS-29

VS-29W

10 11

VS-28

50S103208S25B

VSXA-17Y

50S252024E140

VS-46Y

VS-45Y

DESCRIPTION

14” UPRIGHT ROD 18” UPRIGHT ROD BASE LEVELING SCREW SCREW, 5/16-18 X 3/4 LG. SLOTTED PAN HD. LOCKWASHER, EXTERNAL TOOTH, 5/16 X 5/8 X 1/32 CLAMP GEAR SCREW ASSEMBLY CLAMP SCREW ASSEMBLY TENSION INSERT BELLEVILLE SPRING WASHER TENSION SCREW SCREW, #10-32 X 1/4 LG. SLOTTED SET CLAMP ASSEMBLY

SCREW, 1/4-20 X 3/4 LG. SOC. HD. CAP, 18-8 SS MODEL S-E GEAR SCREW ASSEMBLY MODEL S-E CLAMP SCREW ASSEMBLY

QTY.

OPTIONAL

1 2 1 1 1 1 1 1 2 1 1 1

1 1 1

Figure H1

Brookfield Engineering Labs., Inc. Page 65 Manual No. M/97-164-F1 102

Unpacking

Check carefully to see that all the components are received with no concealed damage.

1 Base, VS-2, with 2 Leveling Screws, VS-3, packed in a cardboard carton 1 Upright Rod, VS-34, with attached Clamp Assembly, VS-35Y

Assembly (Refer to Figure H1)

1. Remove the base assembly from the carton.

2. Remove the screw and washer from the upright rod. Place the rod and clamp assembly into the hole in the top of the base.

Note: The “Front” designation on the clamp assembly should face the

opening of the legs, i.e., parallel to the leveling feet.

3. Rotate the rod/clamp assembly slightly until the slot on the bottom of the rod intersects the pin located in the base.

4. While holding the rod and base together, insert the slotted screw and washer as shown and tighten securely.

Viscometer Mounting

Insert the Viscometer mounting rod into the hole (with the cut-away slot) in the clamp assembly. Adjust the instrument level until the bubble is centered from right to left and tighten the clamp knob (clockwise). Use the leveling screws to “fine” adjust the viscometer level. Note: If the Digital

Viscometer cannot be leveled, check to insure that the rod is installed with the gear rack facing forward.

Note: If the clamp is taken off the upright rod, the tension insert (Part No. VS-29) must be

properly aligned for the clamp to fit back onto the upright rod. When the tension insert (Part No. VS-29) is inserted, its slot must be in the vertical position parallel to the upright rod. If the slot is not in the correct position, the clamp will not slide down over the upright rod. Use a small screwdriver or pencil to move it into the correct position. The VS-29W Belleville spring washers must face each other as illustrated. Adjust the VS-28 tension screw so that the clamp assembly is not loose on the upright rod.

Caution: Do not tighten the clamp knob unless the viscometer mounting rod is

inserted in the clamp assembly.

Center the Viscometer relative to the stand base and retighten the jam nut as required. Referring to the Viscometer bubble level, adjust the leveling screws until the instrument is level.

Brookfield Engineering Labs., Inc. Page 66 Manual No. M/97-164-F1102

Appendix I - DVE-50 Probe Clip

Probe Clip DVE-50 is supplied with all model DV-II+ Viscometers, DV-III Rheometers, and Digital Temperature Indicators. It is used to attach the RTD temperature probe to the LV Guard Leg (Part No. B-20Y) or 600 ml low form Griffin beaker. Figure H1 is a view of the Probe Clip, showing the hole into which the RTD probe is inserted, and the slot which fits onto the LV guard leg. When inserting the RTD probe into the Probe Clip, the upper part of the Clip is compressed by squeezing the points shown in Figure H1. Note: All Viscometer/Rheometer models — except LV — use the Probe Clip as shown in Figure H3.

RTD Probe

Hole

Squeeze Here when

installing RTD

Temperature Probe

Figure H1

Figure H2 shows the Probe Clip (with RTD temperature probe installed) mounted on the LV guard leg.

Figure H3 shows the Probe Clip mounted in a 600 ml low form Griffin beaker. This mounting may be used with LV, RV, HA and HB series instruments.

Note: The RTD probe must be parallel to the beaker wall so as not to interfere with the

viscosity measurement.

RTD Temperature

Probe

LV Guard Leg

Assembly B-20Y

Probe Clip

DVE-50

RTD Temperature Probe

500 ml

600 ml

USA

No. 14000

400

300

200

100

DVE–50

Probe Clip

600 ml Low Form

Griffin Beaker

Figure H2

Brookfield Engineering Labs., Inc. Page 67 Manual No. M/97-164-F1 102

Figure H3

Appendix J - Fault Diagnosis and Troubleshooting

Listed are some of the more common problems that you may encounter while using your Viscometer.

❏ Spindle Does Not Rotate

✓ Make sure the viscometer is plugged in. ✓ Check the voltage rating on your viscometer (115, 220V); it must match the wall voltage. ✓ Make sure the motor is ON and the desired rpm is selected.

❏ Spindle Wobbles When Rotating or Looks Bent

✓ Make sure the spindle is tightened securely to the viscometer coupling. ✓ Check the straightness of all other spindles; replace if bent. ✓ Inspect viscometer coupling and spindle coupling mating areas and threads for dirt; clean

threads on spindle coupling with a 3/56 left-hand tap.

✓ Inspect threads for wear; if the threads are worn, the unit needs service (see Appendex K).

Check to see if spindles rotate eccentrically or wobble. There is an allowable runout of 1/32inch in each direction (1/16-inch total) when measured from the bottom of the spindle rotating in air.

✓ Check to see if the viscometer coupling appears bent; if so, the unit is in need of service (see

Appendix K, “How to Return Your Viscometer”).

If you continue to experience problems with your viscometer, follow this troubleshooting section to help isolate potential problems.

❏ Perform an Oscillation Check

✓ Remove the spindle and turn the motor OFF; select display to % torque mode. ✓ Gently push up on the viscometer coupling. ✓ Turn the coupling until the digital display reads 10-15 on the % display. ✓ Gently let go of the coupling. ✓ Watch the digital display; you should see a “run” of numbers next to the %; the “run” of

numbers should ultimately stop at 0.0 (+/- 0.1).

If the digital display does not return to ZERO, the unit is in need of service (see Appendix K, “How to Return Your Viscometer”).

Brookfield Engineering Labs., Inc. Page 68 Manual No. M/97-164-F1102

❏ Inaccurate Readings

✓ Verify spindle, speed and model selection. ✓ If % readings are under-range (less than 10%), the display will flash; change spindle and/or

speed.

EEE” on the digital display means the unit is over-range (greater than 100%); reduce speed

✓ “

and/or change spindle.

✓ Verify test parameters: temperature, container, volume, method. Refer to:

•“More Solutions to Sticky Problems”, Section III

•“DV-II+ Programmable Viscometer Operating Instructions, Appendix C, “Variables in Viscosity Measurements.

✓ Perform a calibration check; follow the instructions in Appendix E. ✓ Verify tolerances are calculated correctly. ✓ Verify the calibration check procedures were followed exactly.

If the unit is found to be out of tolerance, the unit may be in need of service. See Appendix K for details on “How to Return Your Viscometer”.

❏ Viscometer Will Not Return to Zero

✓ Viscometer is not level

• Check with spindle out of the sample

• Adjust the laboratory stand

✓ Pivot point or jewel bearing faulty

• Perform calibration check

• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair

❏ Display Reading Will Not Stabilize

✓ Special characteristic of sample fluid. There is no problem with the viscometer.

• Refer to Appendix C

✓ Check for erratic spindle rotation.

• Verify power supply

• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair

✓ Bent spindle or spindle coupling.

• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair

✓ Temperature fluctuation in sample fluid

• Use temperature bath control.

Brookfield Engineering Labs., Inc. Page 69 Manual No. M/97-164-F1 102

❏ No Recorder Response

✓ Be Sure the viscometer is not at ZERO reading. ✓ Be sure the recorder is ON and not on STANDBY. ✓ Verify the range settings. ✓ Check cable leads for clean connection.

❏ Recorder Pen Moves in Wrong Direction

✓ Output polarity reversed

• Reverse leads

❏ Viscometer Will Not Communicate with PC

✓ Check the comm port and make sure the correct port is being utilized. ✓ Check the interconnecting cable for proper installation ✓ Check the Options menu and make sure the PC PROG is set to either “ON” or “OFF” in

accordance with the operating instructions for the program/procedure in use.

If the above do not rectify the problem, do the following:

✓ Shut off viscometer ✓ Attach printer. ✓ Press and hold the MOTOR ON/OFF and ENTER/AUTORANGE keys simulanteously while

turning the viscometer power on. Figure J1 appears on the viscometer display.

VISCOMETER SETUP ENTER TO START

Figure J1

✓ Press ENTER/AUTORANGE key and Figure J2 appears.

PRINT PARAM RAM? NO THEN ENTER

Figure J2

✓ Scroll to YES and press the ENTER/AUTORANGE key. Figure J3 appears.

PRINT PARAM RAM? YES THEN ENTER

READY PRINTER ENTER TO START

Figure J3

Brookfield Engineering Labs., Inc. Page 70 Manual No. M/97-164-F1102

✓ Press ENTER/AUTORANGE. Information similar to Figure J4 will appear on your printer

output.

Timed Stop Minutes 01

Seconds 30 RPM 50

Time to Torque Torque % 60

RPM 50

Print Interval Minutes 00

Seconds 05 Printer Port Parallel or Serial Parallel Last Spindle Used 05 Special Spindle AA SMC 0000.000 Special Spindle AA SRC 00.000 Special Spindle BB SMC 0000.000 Special Spindle BB SRC 00.000 Special Spindle CC SMC 0000.000 Special Spindle CC SRC 00.000 Special Spindle DD SMC 0000.000 Special Spindle DD SRC 00.000 Display Units CGS Temperature Scale C Speed Set INTERLEAVE Viscometer Model RV Last BEVIS Program 1 Raw Temps 2E0C 00FE Torque Scale E19F

Figure J4

✓ Call Brookfield to review the information on your printer output. ✓ Figure J5 next appears on the viscometer display. Turn the viscometer power off.

SETUP COMPLETE TURN POWER OFF

Figure J5

Brookfield Engineering Labs., Inc. Page 71 Manual No. M/97-164-F1 102

Appendix K - Warranty Repair and Service

Warranty

Brookfield Viscometers are guaranteed for one year from date of purchase against defects in materials and workmanship. They are certified against primary viscosity standards traceable to the National Institute of Standards and Technology (NIST). The Viscometer must be returned to Brookfield Engineering Laboratories, Inc. or the Brookfield dealer from whom it was purchased for no charge warranty service. Transportation is at the purchaser’s expense. The Viscometer should be shipped in its carrying case together with all spindles originally provided with the instrument.

For repair or service in the United States, return to:

Brookfield Engineering Laboratories, Inc.

11 Commerce Boulevard

Middleboro, MA 02346 U.S.A.

Telephone: (508) 946-6200 FAX: (508) 946-6262

http://www.brookfieldengineering.com

For repair or service outside the United States, consult Brookfield Engineering Laboratories, Inc. or the dealer from whom you purchased the instrument.

For repair or service in the United Kingdom, return to:

Brookfield Viscometers Limited

1 Whitehall Estate

Flex Meadow

Pinnacles West

Harlow, Essex CM19 5TJ, United Kingdom

Telephone: (44) 27/945 1774 FAX: (44) 27/945 1775

sales@brookfield.co.uk

For repair or service in Germany, return to:

Brookfield Engineering Laboratories Vertriebs GmbH

Hauptstrasse 18

D-73547 Lorch, Germany

Telephone: (49) 7172/927100 FAX: (49) 7172/927105

info@brookfield-gmbh.de

Brookfield Engineering Labs., Inc. Page 72 Manual No. M/97-164-F1102

Packaging Instructions to Return a Viscometer for Repair or Calibration

❏ Remove and return all spindles (properly packed

for shipping).

❏ Clean excess testing material off the instrument. ❏ Include MSDS sheets for all materials tested with

U R E

this instrument.

❏ Support pointer shaft with white, nylon shipping

cap, as shown in Figure K1, or with white plastic shipping cap originally supplied with instrument.

❏ Pack the instrument in its original case. Cases are

available for immediate shipment from Brookfield. If the case is not available, take care to wrap the instrument with enough material to support it. Avoid using foam peanuts or shredded paper.

❏ DO NOT send the laboratory stand unless there is

a problem with the upright rod, clamp or base. If there is a problem with the stand, remove the upright rod from the base and individually wrap each item to avoid contact with the instrument. Do not put lab stand in viscometer carrying case.

Foam Insert

or Tissue Paper

U R E

For cone/plate instruments, please remove the cone spindle and carefully pack in place in the shipping case. If available, use the original foam insert or roll up one sheet of tissue paper (or similar) and place between the spindle coupling and cup assembly (see Figure K2). This will help prevent damage in shipping.

CONE/

PLATE

❏ Fill out a copy of the Viscometer Information Sheet

(on page 74) with as much information as possible to help expedite your service. If you do not use this form, please include a memo indicating the type of problem you are experiencing or the service you need performed. Please also include a purchase order number for us to bill against.

❏ Package the instrument and related items in a strong

box for shipping. Mark the outside of the box with handling instructions.

Example: "Handle with Care" or

"Fragile - Delicate Instrument"

Brookfield Engineering Labs., Inc. Page 73 Manual No. M/97-164-F1 102

Providing us with the following information will help us to service your equipment more quickly and efficiently. Please photocopy, fill out and return a copy of this form with your instrument.

Brookfield recommends that all viscometers be returned for annual calibration to ensure that your equipment continues to provide the same accuracy you have come to expect from Brookfield products.

VISCOMETER INFORMATION

Date:_______________________

Serial Number: _______________________ Model: _____________________

Brookfield DV-II+ Programmable Viscometer User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

I. INTRODUCTION

I.1 Components

I.2 Utilities

I.5 Safety Symbols and Precautions

I.6 Key Functions