
Brookeld Engineering Labs., Inc. Page 80 Manual No. M03-165-F0612
Brookeld Viscosity Standard Fluid General Information
We recommendthatBrookeldViscosityStandardFluidsbereplacedonanannualbasis,one
yearfromdateofinitialuse.Theseuidsarepuresiliconeandarenotsubjecttochangeover
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
inaccordancewithstate,localandfederalregulationsasspeciedonthematerialsafetydatasheet.
BrookeldEngineeringLaboratoriesdoesnotrecertifyViscosityStandardFluids.Wewillissue
duplicatecopiesoftheCerticateofCalibrationforanyuidwithintwoyearsofthepurchase
date.BrookeldViscosityStandardFluidsarereusableprovidedtheyarenotcontaminated.
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
orThermosel,theuidisnormallydiscarded.
Calibration Procedure for LV #1-3 (#61-63) and RV, HA, HB #1-6 Brookeld Spindles
Please note that the LV #4 (64) and RV, HA, HB #7 (07) spindles have been omitted from this
procedure. Brookeld does not recommend the use of these spindles to perform a calibration
check on your instrument. Reasons pertain to the small amount of spindle surface that
makes contact with the viscosity standard, the difculty of establishing the immersion mark
precisely and the need for precise temperature control at 25°C in the immediate vicinity of
the spindle.
Followthesestepsusingoneoftherecommendedspindlestoverifycalibrationonyourinstrument:
1) Placetheviscositystandarduid(inthepropercontainer)intothewaterbath.
2) Lower the DV-II+Pro 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
airbubblesbeneaththediskbyrstimmersingthespindleatanangle,andthenconnecting
it to the Viscometer.
4) Theviscositystandarduid,togetherwiththespindle,shouldbeimmersedinthebathfor
aminimumof1hour,stirringtheuidperiodically,priortotakingmeasurements.
5) After 1 hour, check the temperature of the viscosity standard uid with an accurate
thermometer.
6) Iftheuidisattesttemperature(±0.1°Cofthespeciedtemperature,normally25°C),
measure the viscosity and record the Viscometer reading.
Note: The spindle must rotate at
least ve (5) times before readings are taken.
7) The viscosity reading should equal the cPvalueontheuidstandardtowithinthecombined
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.
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