Viscosity at final plays a key role in th processing stage. The efflux time can also be converted to kinematic viscosities centistokes, cst through the conversion. Efflux viscometer the efflux viscometer, also known as flow cup, type ford is a traditional instrument used worldwide for the determination of the kinematic viscosity of inks, resins, varnishes and any other newtonian fluids. Pdf correlation between dry rubber content in field. Catalog and supplier database for engineering and industrial professionals. Viscometers are instruments used to measure viscosity, the internal friction of the layers of a liquid in motion. Sep 29, 2012 the saybolt viscometer, one of the efflux cup viscometers is the standard instrument for testing petroleum products. Clean the viscometer using suitable solvents, and dry by passing clean, dry, filtered air through the instrument to remove the final traces of solvents. The furol and asphalt orifices, respectively, have an efflux time of approximately, onetenth and onehundredth that of the universal orifice. Without recharging the viscometer, make check determinations by repeating. Portable viscometer viscolite d21 viscolite d21 is a portable resonant or vibrational viscometer used in industrial and research applications to measure viscosity in samples 100 ml 100 cc 3.
A viscometer also called viscosimeter is an instrument used to measure the viscosity of saybolt viscometer experiment fluid. This type of viscometer consists of a circular cylinder filled by the liquid under investigation. Measures viscosity and temperature simultaneously with an optional temperature probe with a choice of 18 different speeds. Description of redwood viscometer the redwood viscometer, 3 which is standard in england, is of the same general efflux type as the engler, of germany, and the saybolt universal, which has been adopted as standard for lubri cating oils in the united states. The viscosity of liquids ubc open collections university of. The controller can calibrate the timeoffall value to cup seconds known as efflux cupsaybolt universal second sus or centipoise. Generally, the results show that the speed of efflux for a liquid with a large kinematic viscosity is lower than that for a liquid with. About the measuring cystems for bmlviscometer pdf file viscometer 4 a viscometer to measure the theological properties of mortars, cement based repair materials, grout and pastes. A schematic diagram of a simple u tube viscometer and a flow cup. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used. In paint industries, viscosity is commonly measured with a zahn cup, in which the efflux time is determined and given to customers.
Remove the solvent by suction and dry the viscometer with dustfree and oilfree air or nitrogen. Pdf correlation between dry rubber content in field latex. In industry viscometer and rheometer are traditionally used for the quality control in order to determine these physical features. Calculate the kinematic viscosity of the sample by multiplying the efflux time by the viscometer constant. Successful communication is indicated by a green light beside the port designation.
The ac input voltage and frequency must be within the appropriate range as shown on the name plate of the viscometer. To measure the efflux time, allow the liquid sample to flow freely down past mark e, measuring the time for the meniscus to pass from mark e to mark f. To do this, use the adjustment screws of the support base and control the adjustment with the help of the spirit level on the viscometer. A standard ball is allowed to fall down this tube over a calibrated distance of 100 mm.
Raptis, an ultrasonic instrument for measuring density and viscosity of tank waste, in science and technology for disposal of radioactive tank wastes, proceedings of the american chemical society symposium on science and technology for disposal of radioactive tank wastes, ed. The cannonfenske opaque reverseflow viscometer see also astm d 445. May 2011 bitumen and bituminous binders determination of efflux time by the efflux viscometer part 2. A viscometer also called viscosimeter is an instrument used to measure the viscosity of a fluid. Determination of efflux time by the efflux viscometer. Viscometers 179 companies viscometers are used to define the viscous properties of a fluid at ambient or defined. We would like to show you a description here but the site wont allow us. On paint standard specifications, one denotes viscosity in this manner. The viscometer size is selected to give efflux times of over 100 s, but less than 800 s. Make sure that the ac power switch at the rear of the dvii is in the off position. Apr 27, 2015 falling sphere viscometer the falling ball viscometer is based on stokes law.
The interface cable is supplied with wingather sq software. Attach the spindle lefthand thread to the viscometer lower shaft by lifting the coupling screw slightly. The model 800 8speed electronic viscometer is designed and exclusively manufactured by ofi testing equipment, inc. Calculation of viscometer constants for cannonfenske. Viscosity of liquids viscosity of liquids theory, estimation, experiment, and databydabir s. A redwood viscometer is used to measure the flow of eight different liquids including engine oil, sunflower. Viscometers or viscosimeters are important to many industries, including the adhesive, biotech, chemical, food, paint, petroleum, and pharmaceutical industries. The saybolt viscometer, one of the efflux cup viscometers is the standard instrument for testing petroleum products. If asrm efflux time is less than 60 s, select a viscometer of smaller capillary diameter and repeat the operation. Measuring standard power power weight range spindles requirement w kg sts2011 l 1001611 20 to 2. It can be operated either in standalone mode with the onboard keypad or with a computer and ofites orcada software. Featuring menudriven electronics, the viscopro 2000 is the ideal solution for singlechannel control needs, offering measurement ranges and memory control for up to 40 fluid settings. It is commonly perceived as flow behaviour or resistance to pouring.
Pdf we have looked at the efflux of a viscous liquid from an orifice. The ofite model 800 viscometer determines the flow characteristics of oils. By measuring the damping, the product of viscosity and density may be calculated by rheonics proprietary algorithms. Instructions for the use of the ubbelohde viscometer. Flow of molten milk chocolate from an efflux viscometer under. The rotary viscometer must be adjusted until it is exactly vertical. Viscosity of newtonian and nonnewtonian liquids rotary. Lower the viscometer until the surface of the liquid exactly reaches the. The efflux time can also be converted to kinematic viscosities centistokes. With its timed measurement function, data can easily be sent to a pc or printer.
Kinematic viscosity is the dynamic viscosity divided by the density typical units m2s, stokes, st. All bsi british standards available online in electronic and print formats. This is similar in principle to the flow cups efflux cups like the ford, zahn and shell cups which use different shapes to the cone and various nozzle sizes. Flow of molten milk chocolate from an efflux viscometer. The bykovisc ds has a direct digital readout of krebs units ku, centipoise cp, and grams gm. Viscometers, monitor and control, safety, consumables. Find productsservices conduct research productsservices for automatic efflux cup viscometers. Connect the power cord to the socket on the back panel of the instrument and plug it into the appropriate ac line. Mount the guard leg, if used, spindle protector on the viscometer. Dial reading viscometer from brookfield possible customer questions and answers support materials see document demos demo units are available with fungilabs leasing.
One can convert efflux time to kinematic viscosity by using an equation for each cup specification number, where t is the efflux time and. Correlation between dry rubber content in field latex and viscosity measured with efflux time method article pdf available in songklanakarin journal of science and technology 345. It is extensively used worldwide in both the field and laboratory for the precise measurement of rheological properties of fluids. Liquids with efflux times greater than s are not conveniently tested with this ori. Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. The efflux time is measured by allowing the sample to flow freely through mark c, measuring the time for the meniscus to pass from c to e.
The more viscous the fluid, the higher the mechanical damping of the resonator. A continuous sensing capability for rapid viscosity measurement makes this economical dv1 digital viscometer a standout. Cutback and fluxed bituminous binders bs en iso 193962. Sep 18, 2015 efflux cup viscometers are most commonly used for fieldwork to measure the viscosity of oils, syrups, varnish, paints and bitumen emulsions. Pdf computational model for speed of efflux in liquids. Bsu tube glass capillary viscometers are ideal for measuring the kinematic viscosity of transparent newtonian fluids within a range of 0.
Saybolt viscometer efflux cup viscometers instrumentation. To obtain kinematic viscosity in mm2 s cst multiply the efflux time in seconds by the viscometer constant. The rheonics srv fluid viscometer measures viscosity by means of a torsional resonator, one end of which is immersed in the fluid under test. Us3071961a us8643a us864359a us3071961a us 3071961 a us3071961 a us 3071961a us 8643 a us8643 a us 8643a us 864359 a us864359 a us 864359a us 3071961 a us3071961 a us 3071961a authority us united states prior art keywords tube oil conduit viscometer capillary tube prior art date 19591222 legal status the legal status is an assumption and is not a. The testing procedure is quite similar to the capillarytube viscometers 5. Some completely automatic instruments control the temperature, fill the viscometer, take several readings sometimes with dilutions, as well as clean, rinse, and dry the viscometer before the next filling. There are three types of orifices availableuniversal, furol, asphalt. The viscometer constant at other temperatures can be obtained by interpolation or extrapolation. Viscosity 5 viscosity coefficients viscosity coefficients can be defined in two ways. Pdf analysis of kinematic viscosity for liquids by varying.
Download citation flow of molten milk chocolate from an efflux viscometer under vibration at various frequencies and displacements the behavior of chocolate was characterized in a viscometer. The ofite model 900 viscometer is a true couette rotational oilfield viscometer. The testing procedure is quite similar to the capillarytube viscometers where efflux time of a specified. Falling sphere viscometer the falling ball viscometer is based on stokes law. The digital stormer maintains the rotational speed at 200 rpms in compliance with astm d562. Viscosity describes a fluids internal resistance to flow and may be thought of as a measure of fluid friction. On kv4000, the user can enter the viscosity constant for each viscometer on the front lcd controldisplay, and then get the test result in both efflux time and viscosity units automatically after stopping each timer. Rheonics srv inline online viscometer for fluid viscosity. The instrument prints efflux times and in some cases can be programmed to print viscosities. The instrument rapidly calculates viscosity values. Efflux cup viscometers are most commonly used for fieldwork to measure the viscosity of oils, syrups, varnish, paints and bitumen emulsions. Table 1 pipe dimensions length inches inside diameter inches 30 316 24 316 12 316 6 316 1 316.
The marsh funnel viscometer measures viscosity from the time efflux time it takes a known volume of liquid to flow from the base of a cone through a short tube. Lower the viscometer until the surface of the liquid exactly reaches the calibration mark of the rotary body. Viscosity is a measure of the resistance of a fluid to deform under shear stress. Other readers will always be interested in your opinion of the books youve read. The flow rate or efflux time represents the fluid flow for a set flow resistance. Oct 16, 2018 the controller can calibrate the timeoffall value to cup seconds known as efflux cupsaybolt universal second sus or centipoise. Stokes law can be used to calculate the viscosity of the fluid. Dynamic viscosity, also absolute viscosity, the more usual one typical units pas, poise, p. Efflux from a tank system h the length and the diameter of the exit pipe are variables depending upon which of the eight available pipes is used. Calculation of viscometer constants for cannonfenske routine. Contec presents a new type of viscometer which uses the same measurement system as the bml viscometer for mortar and pastes, the contec viscometer 4. One of the most common instruments for measuring kinematic viscosity is the glass capillary viscometer.
The furol and asphalt orifices, respectively, have an efflux. The kinematic viscosity of castrol edge 0w40 oil before and after operation in the engine was determined according to gost 332016 using an vpzh2 capillary viscometer with a capillary diameter. Understanding fluid flow by modeling efflux from a tank. Poor repeatability can result from incomplete dissolution of the pulp, inadequate temperature control, a dirty viscometer, or impurities in the nitrogen gas.
Hold it firmly with one hand while screwing the spindle on with the other note lefthand thread. Viscosity is a tensorial quantity that can be decomposed in different ways into two independent components. Viscometer in chemical applications viscometer basic information the viscosity rheology describes by means of a measurement the flow behavior of the liquids and gases. To repeat efflux time measurement, repeat steps 7 and 8. Us3071961a automatic viscometer and process of using. During the cleaning procedure, maintain the viscometer, as well as the solvent, at 5 c in thermostatic bath 5. Periodically, traces of n organic deposits should be removed with chromic acid or non. Pdf viscosity is a property of a liquid and is defined as the resistance of a liquid to flow. Viscosity describes a fluids internal resistance to flow and may be thought of. Thus, a rheometer can be considered as a special type of viscometer.
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