Presentation on

APC, S. Patel 1

Guided by: Dr. V.T.Thakkar

BROOKFIELD DIGITAL

VISCOMETER

• PHOTOGALLERY

0

• SOP

1

• VALIDATION

2

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SOP

1) Turn on the viscometer and allow standing,must be auto zero. After the few seconds thescreen appears which indicates 2 digits.

2) Now press the key. The screen displays theinstruction to remove spindle. After removingthe spindle and pressing the key theinstrument begins. It is auto zeroed.

3) After approximately 15 second the screendisplays the instruction to replace spindle

4) Attach the spindle to viscometer by screwingthem on the lower shaft using left handthread.

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5) Press select spindle key and up and down arrowkeys. When the desired code is displayedrelease the arrow key.

6) To select spindle, first press either up and downkey which cause the area to show current speed,press the set speed key for adjusting the speed.

7) Insert center of this spindle in the test material untilthe fluid level is at the immersion groove on thespindle shaft. Tilt the spindle slightly whileimmersing to avoid air entrapment.

8) To measure high viscosity choose a small spindleand to slow speed if the chosen spindle/speedresult in torque above 100% and then reduce thevalue.

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9) Allow time for the individual reading to stabilize,record the value.

10) Press the motor on/off/escape key to turn off motor

11) The time mode allows the user to record thereading for fixed period of time or until a set torquevalue is attained.

12) Then enter/auto turnkey allows determiningmaximum calculated viscosity possible with currentspindle/speed.

13) Pressing the up and down arrow keys will allow theviscometer data to be examine, pressing and otherkey ( except enter/ print key) will bring backnormal display.

14) Turn off the mains after use.

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VALIDATION

IQ

• INSTALLATION QUALIFICATION

OQ

• OPERATION QUALIFICATION

PQ

• PERFORMANCE QUALIFICATION

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IQ: INSTALLATION

QUALIFICATION

Inspect package for shipping damage

Confirm that all components have been

supplied as detailed in the Operating

Manual and Packing List

Assemble lab stand as shown in manual.

Mount viscometer head to assembled lab

stand as shown in manual.

Verify appropriate spindle set (LV #1-

#4)(RV/HA/HB #2-#7)

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OQ: OPERATION

QUALIFICATION

Level viscometer using adjustable feet

Remove shipping cap on spindle

coupling nut

Power on Viscometer and follow

instructions displayed to complete auto

zero

Perform oscillation check.

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PQ: PERFORMANCE

QUALIFICATION

Verify calibration using a minimum of

one calibrated viscosity standard fluid

according to the procedure described

below

Centipoise reading should be within the

value stated on the fluid ± the instrument

accuracy and the fluid accuracy.

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Oscillation check

This check verifies the mechanical

condition of the sensing mechanism in the

viscometer.

Auto-zero the instrument according to

directions in the manual.

Do not attach the spindle but do press any

key so the main screen will be displayed.

The display should show 0.0% torque. The

tolerance for this and all tests is ±0.1%

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1) Start the motor rotating at 10 or 20

RPM.

2) The % reading should initially bounce,

then is should stabilize at 0.0% ±0.1%

3) Stop the motor. When the % display

again stabilizes it should return to 0.0%

±0.1%

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Operational and Calibration

Check

Determining Measurement Accuracy

All Brookfield instruments are guaranteed to be

accurate to within 1% of the full scale

range(FSR) in use.

The full scale range (FSR) is simply the

maximum viscosity that can be measured with

any spindle/speed combination.

Select a specific spindle and rotational speed.

To determine the resulting FSR (full scale

range), depress and hold the AUTORANGE key.

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The % display will show 100% and the

cP display will show the FSR (full scale

range) that can be measured under

current choice of spindle and speed.

1% of this value is the measurement

accuracy under these conditions.

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Calibration Check

In principle, all Brookfield rotational

viscometers are calibrated torque meters.

Brookfield offers a variety of viscosity

calibration fluids that enable one to check

the calibration and linearity of the instrument

over its operating torque range of 10%-

100% torque.

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Any spindle and any one of several calibrationfluids may be used to perform a calibrationcheck.

Experts recommend using one spindle and onefluid while taking measurements at multiplespeeds.

This enables multiple calculations of viscositythroughout the torque range of the instrument; one at low torque, one at medium torque and one at

high torque.

The FSR, and consequently the instrumentaccuracy in terms of centipoise, will be differentat each speed.

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The calibration fluid must be transferred into

a 600ml low form, Griffin beaker (without

creating any bubbles) and,

on LV and RV models, the instrument Guard

Leg must be used.

The beaker, fluid, spindle and Guard Leg

must stabilized at 25.0°C (±0.1°C) before the

calibration check can be performed.

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EX:

Actual viscosity is 5,120cP,

Allowable error = 1% of the FSR + 1% of the

actual value of the calibration fluid

The lower and upper viscosity limits,

indicating acceptable calibration, equal the

actual value of the fluid,

in this case 5,120cP, ± the allowable error.

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RPM MIN

cP

MAX cP

(FSR)

1% of

FSR

%

torque

cP

READIN

G

ALLOWAB

LE

ERROR

12 1000 10000 100 51.2 5120 ± 151

6 2000 20000 200 25.5 5100 ± 251

3 4000 40000 400 12.7 5080 ± 451

Allowable error = 1% of the FSR + 1% of the actual

value of the calibration fluid

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Calibration Worksheet

A B C D E F G H I

Fluid

Value

fromCertificate

cP

1% of

Fluid

Value

cP

Instrument

ModelSpindle RPM FSR

cP

(depre

ss

and

holdAUTORA

NGE

key)

1% of

FSR

cP

1% of

FSR

cP

Visco

sity

cP

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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 calculated

belowLow Limit

= A – (B + G)

Reading

I

High Limit

= A + (B + G)

Pass or Fail

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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.

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Reference:

Brookfield DV-ii+ pro, programmable

viscometer, operating manual no. M/03-

165-A0404

“Solution for a viscous world” brookfield

2007 catalog.

www.brookfieldengineering.com

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