DV II + PROGRAMMABLE VISCOMETER Operating Instructions

TABLE OF CONTENTS I.

INTRODUCTION ... 3 I.1 Components ... 4 I.2 Utilities ... 4 I.3 Specifications ... 4 I.4 Installation ... 5 I.5 Key Functions ... 6

II. GETTING STARTED ... 8 II.1 Autozero ... 8 II.2 Spindle Selection ... 9 II.3 Speed Selection, Setting, Running ... 10 II.4 Display Selection ... 11 II.5 Autorange ... 12 II.6 Out of Range ... 13 II.7 Temperature Display ... 14 II.8 Printing ... 14 II.9 Making Viscosity Measurements ... 15 II.10 Time Modes for Viscosity Measurement ... 16 III. OPTIONS ... 17 III.1 Introduction to OPTIONS ... 17 III.2 Setup ... 19 III.2.1 Temperature Display ... 20 III.2.2 Units of Measurement ... 20 III.2.3 Motor Speed Set Selection... 21 III.2.4 Printer Output Port ... 22 III.2.5 Data Averaging ... 22 III.3 Time Modes ... 23 III.3.1 Time to Stop ... 24 III.3.2 Time to Torque... 26 III.3.3 Print Time Interval ... 28 III.3.4 PC Program (On/Off) ... 29 III.3.5 Download a Program ... 29 III.3.6 Run a Program ... 30 IV. DVLOADER SOFTWARE ... 33 IV.1 B.E.V.I.S. Overview ... 33 IV.2 Description of B.E.V.I.S. Commands ... 34 IV.3 Creating a B.E.V.I.S. Program ... 35 IV.4 Downloading a B.E.V.I.S. Program ... 37 IV. 5 Example Programs ... 38

Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I Appendix J Appendix K

-

Cone/Plate Viscometer Set-Up ... 40 Viscosity Ranges ... 44 Variables in Viscosity Measurements ... 47 Spindle and Model Codes ... 49 Calibration Procedures ... 52 Speed Sets ... 59 Communications ... 60 Laboratory Stands... 63 DVE-50 Probe Clip ... 67 Fault Diagnosis and Troubleshooting ... 68 Warranty Repair and Service ... 72

Brookfield Engineering Labs., Inc.

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Manual No. M/97-164-D1000

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 dyne-cm milli Newton - m 673.7 0.0673 7,187.0 0.7187 14,374.0 1.4374 57,496.0 5.7496

Model LVDV-II+ RVDV-II+ HADV-II+ HBDV-II+

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 Viscosity: 1 mPa•s Shear Stress: 1 Newton/m2 Torque: 1 Newton-m

= = =

CGS 1 cP 10 dyne/cm2 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.

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Manual No. M/97-164-D1000

I.1 Components

Component DV-II+ Viscometer Model S Laboratory Stand Spindle Set with Case LVDV-II+ set of four spindles or RVDV-II+ set of seven spindles or HA/HBDV-II+ set of seven spindles

Part Number

Quantity

varies

1

MODEL S

1

varies (SSL) (SSR) (SSH)

1 1 1 1

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

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

1

RTD Temperature Probe

DVP-94Y

1

Guard Leg: LVDV-II+ RVDV-II+

B-20Y B-21Y

Carrying Case

DVE-7Y

1

DVLOADER

1

Interconnecting Cable

DVP-80Y

1

Operating Manual

M/97-164

1

1

DVLOADER Software Disk (3-1/2")

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: Less than 20 WATTS Power Cord Color Code: United States

Hot (live) Neutral Ground (earth)

Outside United States

Black White Green

Brown Blue Green/Yellow

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. Brookfield Engineering Labs., Inc.

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Weight:

Gross Weight Net Weight Carton Volume

23 lbs. 20 lbs. 1.65 cu. ft.

10.5 kg. 9 kg. 0.05 m3

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 - 4 Volts DC (10mv / ˚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 (expected by April 2000), CE

I.4 Installation 1) Assemble the Model S Laboratory Stand (refer to assembly instructions in Appendix H). 2) Connect the RTD probe to the socket on the rear panel of the DV-II+. 3) 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.

4) Remove the white shipping cap which secures lower coupling nut on Viscometer to pivot cup. 5) 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 name plate of the Viscometer. Note: The DV-II+ must be earth grounded to ensure against electronic failure!!

6) Turn the power switch to the ON position and allow to warm up for 10 minutes before performing autozero. 7) For Cone/Plate models, refer to Appendix A. 8) If appropriate, connect interconnecting cable to serial port for connection of DV-II+ to PC or printer. 9) If appropriate, connect interconnecting cable to parallel port for connection of DV-II+ to printer. 10) If appropriate, connect interconnecting cable to analog (serial) port for connection of DVII+ to chart recorder. Brookfield Engineering Labs., Inc.

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I.5 Key Functions Figure 1 shows the control keys on the face of the DV-II+ Viscometer. The following describes the function of each key.

MOTOR ON/OFF

OPTIONS

ENTER

ESCAPE

TAB

AUTO RANGE

UP ARROW

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

SET SPEED

SELECT SPINDLE

SELECT DISPLAY

PRINT

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

Figure 1

MOTOR ON/OFF/ESCAPE

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

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/AUTO RANGE ENTER: AUTO RANGE:

SELECT SPINDLE

Used to execute the currently flashing option. 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. PRINT

PRINT

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

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OPTIONS TAB

OPTIONS/TAB

OPTIONS: TAB:

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

Note: Symbol indicating the OPTIONS/TAB key

L°F(FAHRENHEIT) CGS UNITS

Figure 2

Note: Inverted text (black background with white lettering) indicates that the information is flashing on the viscometer display.

Brookfield Engineering Labs., Inc.

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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: 5.0 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 OFFRPM

20.1C % 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).

Brookfield Engineering Labs., Inc.

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II.2

SELECT SPINDLE

Spindle Selection

LVDV-II+ Viscometers are provided with a set of four spindles and a narrow guardleg; RVDV-II+ Viscometers come with a set of seven spindles and a wider guardleg; HADV-II+ and HBDV-II+ Viscometers come with a set of seven 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 blinking stops. If you fail to press the SELECT SPINDLE key before the blinking stops you will have to repeat the above steps and re-select the desired spindle.

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.

Brookfield Engineering Labs., Inc.

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Manual No. M/97-164-D1000

II.3

SET SPEED

Speed Selection, Setting, Running

There are 54 speeds programmed into the DV-II+. These speeds correspond to the standard LVT, RVT, HAT, HBT, LVF and RVF 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 6.0RPM12

20.1C % 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 Brookfield Engineering Labs., Inc.

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Manual No. M/97-164-D1000

selected for the next speed. 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 OFFRPM

20.1C % 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.

II.4

SELECT DISPLAY

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 6.0RPM

20.1C % 15.6

Figure 11

If the viscosity value exceeds 99,999 scientific notation is used. In Figure 11, the viscosity value is 123,400 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 6.0RPM

20.1C % 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.

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SR 40.0 6.0RPM

20.1C % 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. II.5

ENTER AUTO RANGE

Autorange

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).

cP 100.0 60 RPM

%

S61 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.

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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 10 RPM

20.1C % 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 10 RPM

20.1C % 8.2

Figure 16

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

cP ---10 RPM

20.1C % -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

1/SEC=12.3

T=20.1C Z00:30

D/CM2=130

1/SEC=12.3

T=20.1C Z00:30

D/CM2=----

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

Under-Range Operation (<10% torque) (see Fig. 16): ?RPM=50

M=RV

S=29 %=5.2

cP=1040

Negative Torque Operation (see Fig. 17): RPM=50

M=RV

S=29

%=-0.1

M = Torque Range

cP=----

T = Temperature

Z = Time

Figure 18

Brookfield Engineering Labs., Inc.

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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 10 RPM

20.1C % 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

II.8

PRINT

Temperature Range

Temperature Accuracy

-100°C to +149°C +150°C to +300°C

±1.0°C ±2.0°C

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: 1 10 20 30 40 RPM=XXX M=XXXXX S=XX %=XXX.X cP=XXXXX

and CGS units with exponential results. 1 10 20 30

D/CM2=XXXXX

40

RPM=XXX M=XXXXX S=XX %=XXX.X cP=XXXeX

50

and SI units with exponential results. 1 10 20 30

40

60

60

60

ZXX=XX

80 ZXX=XX

70

1/SEC=XXXXX T=XX.XC

50

RPM=XXX M=XXXXX S=XX %=XXX.X mPas=XXXeX N/M2=XXXeX

80

70

1/SEC=XXXXX T=XX.XC

50

RPM=XXX M=XXXXX S=XX %=XXX.X mPas=XXXXX N/M2=XXXXX

70

1/SEC=XXXXX T=XX.XC

50

D/CM2=XXXeX

Similarly, for SI units with non-exponential results. 1 10 20 30 40

60

80 ZXX=XX

70

1/SEC=XXXXX T=XX.XC

80 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). 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) 2)

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

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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. 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. 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.

Brookfield Engineering Labs., Inc.

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III. III.1

OPTIONS OPTIONS TAB

Introduction to OPTIONS

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 Table 2 Options Menu SETUP:

Temperature Units * Speed Sets Printer Port Data Averaging

- - - - -

°F or °C CGS or SI Sequential, Interleave, Custom Serial (RS232) or Parallel Display Only

* 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 TAB

ENTER AUTO RANGE

MOTOR ON/OFF ESCAPE

OPTIONS/TAB

- Toggles between options.

ENTER/AUTORANGE

- Accepts the currently flashing option and moves user to next level (if applicable) of the selected option.

MOTOR ON/OFF/ESCAPE

- Cancels current operation and backs user out one 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

OR SETUP TIME TO STOP

TIME TO TORQUE SET PRINT TIME

TO STOP OR LTIME SET PRINT TIME

SET PRINT TIME PC PROG OFF

OR

PC PROG OFF DOWNLOAD A PROG

OR DOWNLOAD A PROG

SET PRINT TIME PC PROG ON LPC PROG ON

DOWNLOAD A PROG RUN 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. Brookfield Engineering Labs., Inc.

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Selecting an Option The following is a quick reference for entering and using the OPTIONS menu: Press

OPTIONS

To enter Options Menu

TAB

Press

or

To scroll to a specific option

For Options: Press

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.

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L°F(FAHRENHEIT) CGS UNITS

L°C(CENTIGRADE) CGS UNITS

L°F(FAHRENHEIT) CGS UNITS

L°F(FAHRENHEIT) SI UNITS

LCGS UNITS SEQUENTIAL

LCGS UNITS INTERLEAVE

LSEQUENTIAL PRINT SERIAL

LSEQUENTIAL PRINT PARALLEL

LPRINT SERIAL DATA AVERAGING

LCGS UNITS CUSTOM SPEEDS

OPTIONS TAB

Figure 25

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

L°C(CENTIGRADE) 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: Brookfield Engineering Labs., Inc.

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