Thermo Scientific Viscometers Falling Ball Viscometer, HAAKE Viscotester® and Accessories Basic principles in rheology, Selecting a viscometer Viscometry Measuring instruments for the determination of the flow behavior of fluids are called viscometers. Viscosity is a material property which is dependent on different parameters such as mechanical stress and strain, time as well as Rotational viscometers temperature and other ambient Using a rotational viscometer, the conditions. viscosity is calculated from the measured torque and rotational Flow behavior speed as well as the dimensions In rheology we differentiate between of the measuring geometry. If the so-called Newtonian and non- measuring geometry fulfils certain Newtonian materials. Newtonian requirements (e.g. small gap), materials are characterized by a which is the case for coaxial viscosity which may depend on cylinder, plate/plate and cone/plate temperature but is independent of measuring geometries (DIN 53018, the shear rate (and shear stress). DIN 53019...), the absolute value of In contrast, the viscosity of non- the viscosity can be calculated. Newtonian materials depends on the shear rate. For most non- If the dimensions of the measuring Newtonian materials the viscosity geometry are not well defined, only decreases with increasing shear a relative value for the viscosity can rate. This behavior is called shear- be determined. In this case, the thinning, or pseudoplastic. A measured viscosity value not only material which viscosity increases depends on the ambient conditions, at increasing shear rates is called but also on the test method, shear-thickening or dilatant. i.e. the measuring geometry. Materials that do not flow until Falling ball viscometers the applied shear stress surpasses The falling ball viscometer is a a certain value are said to have a conventional and highly accurate yield-stress. instrument for the determination of the absolute value of the viscosity Shear Rate of a Newtonian material. The viscosity can be calculated from the falling time of the ball, the density of the ball as well as the diameter of the tube and the ball. Overview of Thermo Scientifi c HAAKE Viscometers HAAKE HAAKE HAAKE HAAKE Viscotester 1 plus & 2 plus Viscotester 6 plus & 7 plus Falling Ball Viscometer type C Viscotester 550 Description Page 3 Pages 4/5 Page 6 Pages 7-10 Measurement relative relative absolute* absolute** Standards ISO 2555 DIN 53015, ISO 12058 DIN 53018 / 53019, ISO 3219 Viscosity HAAKE Viscotester 1 plus: low L-Version: low to medium low to high low to high HAAKE Viscotester 2 plus: medium R-Version: medium to high Specials battery-powered hand-held instrument, 2 years warranty measurements temperature-controlled, digital display on gases application-oriented packages *For Newtonian substances **Using absolute measuring geometries 2 Thermo Scientifi c HAAKE Viscotester 1 plus & 2 plus Application User friendliness These small, battery-operated The operation of the HAAKE rotational viscometers are suitable Viscotester 1 plus & 2 plus is for quick and reliable tests and especially easy due to the one- comparative measurements for button operation. The Viscotester is quality control applications. The switched on and off by pushing the hand-held instruments can also button once. Pushing the button be operated on a stand. again selects the rotor type and starts the measurement. Order information Digital display Order-No. Description Contrary to the traditional Viscotester Typical application fi elds 399-0100 HAAKE Viscotester 1 plus: models where the viscosity value • Quick viscosity tests, e.g. Basic instrument with batteries is read from an analog dial, the for process optimization instrument holder HAAKE Viscotesters 1 plus and or machine adjustment 2 Measuring cups (A and B) 2 plus show the viscosity value on • Batch control in production 3 Rotors (No. 3, 4, 5) a digital display. Therefore, errors Delivered in a carrying case caused by misreading the dial belong Typical samples to the past. Possible handling errors 399-0200 HAAKE Viscotester 2 plus: • Printing inks, paints, inks as well as service information are • Shampoos, creams, lotions Basic instrument with batteries also shown on the display. instrument holder • Oils, greases, pastes • Sauces, thickeners 1 Measuring cup (3) Main features 3 Rotors (No. 1, 2, 3) • Quick, exact and reliable Measuring principle Delivered in a carrying case • One button operation A rotor rotating at a constant 222-1693 Calibration to a measuring • LCD display speed is immersed in the fluid to accuracy of +/- 1% FSD • No mains supply required (HAAKE Viscotester 2 plus) be tested; the fluid’s resistance to 222-1688 Battery charger incl. the rotation measures the viscosity 4 AA batteries of the fluid. The small battery- operated rotational viscometer can be operated independent of a mains supply, so that quick and reliable viscosity measurements can be performed virtually everywhere. Compatibility Measuring cups and rotors of the previous models HAAKE VT01 and VT02 can also be used with the plus units. Technical data Viscosity range 1 plus: 1.5 - 330 mPas 2 plus: 0.3 - 4000 dPas Temperature up to 150°C Rotor speed 62,5 rpm Reproducibility +/- 1% FSD Measuring accuracy standard: +/- 5% FSD optional: +/- 1% FSD (HAAKE Viscotester 2 plus) Standard display HAAKE Viscotester 1 plus η in mPas HAAKE Viscotester 2 plus η in dPas Optional HAAKE Viscotester 1 plus η in dPas HAAKE Viscotester 2 plus η in mPas 3 Thermo Scientifi c HAAKE Viscotester 6 plus & 7 plus Application The Thermo Scientific HAAKE Viscotester 6 plus & 7 plus units can be used for tests and comparative measurements for quality control according to recognized standards. Compatibility Measuring principle The basic ISO 2555 standard The HAAKE Viscotester is a clas si cal describes the design and the rotational viscometer that measures characteristic measuring technique the resistance of a test substance of a viscosity measuring instrument against a pre set speed. The resulting (torque, speed, rotor geometry). torque or resistance measures the If a rotational viscometer meets viscosity of the fluid. The higher the these requirements – as the HAAKE torque, the higher the vis cos i ty. Viscotester 6 plus & 7 plus do – the Due to the stand ard ized geometry, results comply with the Brookfield the shear rates gener at ed can only method and are 100 %-compatible be de ter mined precisely for as long as comparable viscometer New to ni an substances. versions are used. Version ”L“ or ”R“? Standards is mainly used for low-viscous R for medium-viscous sub stanc es L The HAAKE Viscotester 6 plus sub stanc es such as diluted solutions, is the ”standard” viscometer for & 7 plus meets the following oils, dispersions and emulsions. Milk- 80 % of all vis cos i ty measure ments. standards: like fl uids (2 - 5 mPas) would be an It is es pe cial ly suit ed for the me di um BS: 6075, 5350 example at the low end of viscosity viscosity range extending from ISO: 2555,1652 and motor oil would represent the sewing ma chine oil up to PVC ASTM: 115, 789,1076, 1084, 1286, high end. The meas ur ing range is plas ti sols or whipped cream. 1417, 1439, 1638, 1824, 2196, 2336, from 3 - 6 000 000 mPas. The meas ur ing range is from 20 2364, 2393, 2556, 2669, 2849, 2983, - 40 000 000 mPas. 2994, 3232, 3236, 3716 Common features of Additional features of the HAAKE Viscotester 6 plus & 7 plus HAAKE Viscotester 7 plus • Ready to go package – • Bi-directional RS232 interface unpack, switch on and start • Thermo Scientific HAAKE measuring viscosity RheoWin software (optional) for • Digital display of viscosity, measurement and data evaluation % torque, speed, spindle, upper • Temperature sensor Pt100 to viscosity limit monitor the sample temperature • Integrated automatic diagnostic functionality • Visual and acoustic signals at critical measuring conditions • Digital calibration of the torque with nationally traceable standards • 2 years warranty for the most stable measuring instrument in its class 4 Technical data Ambient conditions: Rotational speeds: The instruments can be used 0.1 / 0.2 / 0.3 / 0.5 / 0.6 / 1 / 1.5 / at ambient tem per a tures from 2 / 2.5 / 3 / 4 / 5 / 6 / 10 / 12 / +10 °C to +40 °C and a relative 20 / 30 / 50 / 60 / 100 / 200 humidity of up to 80 %. The Accuracy: < +/- 0.5 % of the pow er sup ply should be between absolute value 110 - 240V/50-60Hz. Torque: Display: The versions L and R differ in the η dynamic viscosity in mPas (cP) torque range roughly by a factor of 6. upper viscosity limit in mPas The value displayed is measured with a maximum (cP) uncertainty of +/- 1 % in relation to the full scale (100 %). % τ torque in % of the max. value n speed in rpm Viscosity range: # number of the selected spindle Accuracy: +/- 1 % of full scale, Reproducibility: +/- 0.2 %. Τ temperature in °C (F) Version L: 3 - 6.000.000 mPas in 84 ranges (21 speeds with 4 spindles) (only HAAKE Viscotester 7 plus) Version R: 20 - 40.000.000 mPas in 126 ranges (21 speeds with 6 spindles) Order information The Thermo Scientific HAAKE Viscotester 6 plus & 7 plus is supplied as a complete measuring unit consisting of the basic instrument with stand, set of spindles with a storage rack in a stable carry case with multilingual documentation. Order-No. Description Helipath - for comparative measurements 387-0100 HAAKE Viscotester 6L plus: on high viscous samples such Basic instrument with stand, spindles L1 to L4, rack, as creams, pastes, gels etc. spindle guard in a case - up and down movement of the 388-0100 HAAKE Viscotester 6R plus: measuring head allowing the Basic instrument with stand, spindles R2 to R7, rack, spindle guard in a case needle spindle to cut into fresh material tracing a helicoidal 389-0100 HAAKE Viscotester 7L plus: path through the sample Basic instrument with stand, spindles L1 to L4, rack, spindle guard, Pt100 sensor in a case Adapter 390-0100 HAAKE Viscotester 7R plus: - stainless steel sample chamber, Basic instrument with stand, spindles R1 to R4, rack, removable spindle guard, Pt100 sensor in a case - Flow jacket that allows tem- Optional accessories: perature control of the sample between -10°C and 100°C Order-No.