Brookfield DV-II+ Programmable Viscometer User Manual

Name: Brookfield DV-II+ Programmable Viscometer
Brand: Brookfield
SKU: 1438584
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BROOKFIELD DV-II+

PROGRAMMABLEVISCOMETER

Operating Instructions

Manual No. M/97-164-F1102

SPECIALISTS IN THE

MEASUREMENT AND

CONTROLOF VISCOSITY

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

TEL 508-946-6200 or 800-628-8139 (USA only)

FAX 508-946-6262 INTERNET www.brookfieldengineering.com


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

INTRODUCTION

............................................................................................................................

I.1

Components .........................................................................................................................

I.2

Utilities ..................................................................................................................................

I.3

Specifications .......................................................................................................................

I.4

Installation ............................................................................................................................

I.5

Safety Symbols and Precautions..........................................................................................

I.6

Key Functions .......................................................................................................................

I.7

Cleaning

...............................................................................................................................

II.

GETTING

STARTED

....................................................................................................................

II.1

Autozero

.............................................................................................................................

II.2

Spindle Selection ................................................................................................................

II.3

Speed Selection, Setting, Running .....................................................................................

II.4

Display Selection ................................................................................................................

II.5

Autorange ...........................................................................................................................

II.6

Out of Range ......................................................................................................................

II.7

Temperature Display...........................................................................................................

II.8

Printing ...............................................................................................................................

II.9

Making Viscosity Measurements ........................................................................................

II.10

Time Modes for Viscosity Measurement.............................................................................

III.

OPTIONS

......................................................................................................................................

III.1

Introduction to OPTIONS....................................................................................................

III.2

Setup

..................................................................................................................................

III.2.1

Temperature Display ...............................................................................................

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

III.2.3

Motor Speed Set Selection .....................................................................................

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

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

III.3

Time Modes ........................................................................................................................

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

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

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

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

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

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

IV.

DVLOADER

SOFTWARE

...........................................................................................................

IV.1

B.E.V.I.S. Overview ............................................................................................................

IV.2

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

IV.3

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

IV.4

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

IV. 5

Example Programs .............................................................................................................

Appendix A

Cone/Plate Viscometer Set-Up ...........................................................................

Appendix B .................................................................................................

Viscosity Ranges

Appendix C ..................................................................

- Variables in Viscosity Measurements

Appendix D ...................................................................................

- Spindle and Model Codes

Appendix E ........................................................................................

Calibration Procedures

Appendix F ..........................................................................................................

Speed Sets

Appendix G .................................................................................................

Communications

Appendix H ..................................................................................

- Model S Laboratory Stand

Appendix I ..............................................................................................

DVE-50 Probe Clip

Appendix J ..................................................................

- Fault Diagnosis and Troubleshooting

Appendix K ..............................................................................

- Warranty Repair and Service

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/m2	=	10 dyne/cm2
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.

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Manual No. M/97-164-F1 102

I.1

Components

Component

Part Number

Quantity

DV-II+ Viscometer

varies

Model S Laboratory Stand

MODEL S

Spindle Set with Case

varies

LVDV-II+ set of four spindles

SSL

RVDV-II+ set of six spindles (#2 - #7)

SSR

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

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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 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	- 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).

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Manual No. M/97-164-F1 102

I.4 Installation

Note: “IQ, OQ, PQ”, a guideline document for installation, operation and performance 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.

Brookfield Engineering Labs., Inc.

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Manual No. M/97-164-F1102

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	MOTOR ON/OFF/ESCAPE
ESCAPE	MOTOR ON/OFF/ESCAPE

Turns the motor ON or OFF. ESCAPE exits the

Options menu.

MOTOR	OPTIONS	ENTER
ON/OFF	OPTIONS	ENTER
ESCAPE	TAB	AUTO
		RANGE

SET	SELECT
SPEED	SPINDLE

SELECT

DISPLAY

Figure 1

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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Manual No. M/97-164-F1 102

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: 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.

OPTIONS

TAB

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

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		°F(FAHRENHEIT)


	OPTIONS/TAB key		CGS UNITS
	OPTIONS/TAB key



		Figure 2

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

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Manual No. M/97-164-F1102

I.7 Cleaning

Be sure to remove the spindle from the instrument prior to cleaning. Severe instru-

ment 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 mate-
	rial.

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

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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).

Brookfield Engineering Labs., Inc.

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Manual No. M/97-164-F1102

II.2 SPINDLESELECT 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 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 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.

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Manual No. M/97-164-F1 102

II.3	SPEED	Speed Selection, Setting, Running
	SET

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.

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Manual No. M/97-164-F1102

MOTOR ON/OFF/ESCAPE

SET 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 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 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 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 SELECTDisplay Selection

DISPLAY

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.

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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.

II.5 ENTERAUTO Autorange

RANGE

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	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.

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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

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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 PRINT 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		50	60	70	80

	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.

1	10	20	30	40		50	60	70	80

	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.

1	10	20	30	40	50	60	70	80

	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.
1	10	20	30	40	50	60	70	80

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.

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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.

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

III.1 TABOPTIONS 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:		° F or ° C
	Temperature	—	° F or ° C
	Units	—	CGS or SI
*	Speed Sets	—	Sequential, Interleave, Custom
	Printer Port	— Serial (RS232) or Parallel
	Data Averaging	—	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

DOWN ARROW

-Scrolls up through menu or selects new value from list.

-Scrolls down through menu or selects new value from list.

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OPTIONS TAB

ENTER

AUTO

RANGE

OPTIONS/TAB

ENTER/AUTORANGE

-Toggles between options.

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

MOTOR

ESCAPEON/OFF 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

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	TABOPTIONS	To enter Options Menu
Press	or	To scroll to a specific option
For Options:
Press	TABOPTIONS	To toggle between the choices available for a specific option when indicated
Press	ENTER	To select the flashing option
Press	AUTO	To select the flashing option

RANGE

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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Brookfield DV-II+ Programmable Viscometer User Manual

L°F(FAHRENHEIT)

CGS UNITS

L°F(FAHRENHEIT)

CGS UNITS

L°C(CENTIGRADE)

CGS UNITS

L°F(FAHRENHEIT)

SI UNITS

LCGS UNITS

SEQUENTIAL

INTERLEAVE

CUSTOM SPEEDS

LSEQUENTIAL

PRINT SERIAL

PRINT PARALLEL

LPRINT SERIAL

DATA AVERAGING

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:

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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

L°F(FAHRENHEIT)

SI UNITS

Figure 29

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.2.3Motor 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

CUSTOM SPEEDS

SEQUENTIAL

Figure 31

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