Operating Instructions Rheomat R 140
Contents
1. 5 2 Measuring systems To define a measuring system the according KD and Ktau values are stored see Chapter 2 The following measuring systems are already defined on delivery and can not be overwritten Measuring systems acc DIN 53 018 53 019 11 22 33 Relative systems 12 23 Anchor shaped systems 71 72 73 74 75 Customized measuring systems can be used For correct calculation of shear rate and shear stress for these measuring systems the according factors have to be deter mined and entered into the Rheomat R 140 These factors can be stored under the chosen measuring system number 01 99 see exceptions above For calculation of the factors KD and KTau please see chapter 2 Calculate the factors KD and KTau see chapter 2 Press 1 Key and power on simultaneously Display SYSTEM NR The Numbers 01 99 are available for customized measuring systems with exception of the numbers mentioned above Rheomat R 140 8 Enter number and confirm with E Display KD Enter value KD for shear rate and confirm with E Display KTAU Enter value KTau for shear stress and confirm with E Note The numbers and factors of a customized measuring system can be over written by entering new values 6 Measurement 6 1 Preparation The filling of the measuring system has to be done very carefully Please refer to the given filling volumes see chapter 7 4 2 ff Air bubbles in the measuring gap have an influe2. Version 03 09 1 1 Introduction The proRheo R 140 is used for simple determination of dynamic viscosity of a wide range of substances in laboratory The proRheo R 140 is a rotational viscometer Its open concentric measurement sys tem allows measurements by immersion Measuring head and measuring tube are rigidly coupled motor The torque is determined by measuring the motor current which is needed to have the measuring bob rotate in the sample at a given rotational speed Viscosity is calculated from this torque the given shear rate and the measuring system used The display shows the following data the torque M mN m the shear rate D sl the shear stress T tau Pa the calculated viscosity n eta Pa s the measurement system e g 11 2 Measuring Principle Measuring viscosity with the R 140 is based on the SEARLE Principle Rotational rheometer with fixed measuring tube or cup and rotating measuring bob Figure 1 The measuring bob rotates at a constant rotational speed n in the sample The nec essary torque to keep the measuring bob rotating at a constant speed is a direct measure for the sample s viscosity The evaluation of rotational speed n and torque M follows according DIN 53 019 Rheomat R 140 2 Definitions Shear rate D Loss of speed between measuring bob and measuring tube The shear rate is a measure for the power with which the sample is sheared in the measuring
3. 16 7 4 Technical data and tables 7 4 1 Rheomat R140 Measurement principle Measuring systems Rotational speed e Range e Accuracy Torque Admissible ambient temperature Data memory Dimensions Measuring head e Width x Depth x Height e Weight Power supply unit e Voltage current e Frequency e Type of protection e Approvals Rotational viscometer Cylindric DIN 53 019 Cone plate DIN 53 019 Double gap DIN 53 019 ISO 2555 Anchor former TV STV Bells VT 5 to 1000 min 1 0 5 of entered rated value 0 25 to 10 0 mN m 10 to 40 C Lithium battery lifetime min 3 years 105 x 135 x 350 mm 2 2 kg 100 120 V 10 approx 320 mA or 220 240 V 10 approx 160 mA 50 60 Hz l Europe EN 60950 Electrical safety EN 55022 Interference suppression Canada CSA 22 2 No 151 M1986 Rheomat R 140 17 7 4 2 DIN Measuring systems Following DIN Standard 53018 53019 System Tube Bob Shear rate Viscosity Fill No EW Pa s volume 7 mm No mm No ml 11 32 54 1 30 1 6 5 1291 0 005 19 Ca 24 22 26 03 2 24 2 6 5 1291 0 010 38 Ca 16 33 15 18 a 14 3 6 5 1291 0 050 191 Ca 9 19 32 54 31 5 9 16 1 3230 0 002 7 Ca 18 Cone Plate measuring systems following DIN Standard 53018 53019 Fill System Cone Cone Shear rate Viscosity volume Nr EW Pas ml mm Angle 5 50 0 5 60 12 00
4. Stand rod Stand arm with locking screw Measurement system of stainless steel comprising Measuring bob 1 30 mm 45 mm Measuring bob 2 24 mm 36 mm Measuring bob 3 14 mm 216 mm Measuring tube 1 32 54 mm Measuring tube 2 26 03 mm Measuring tube 3 15 8 mm Cap 1 for measuring tube 1 Cap 2 for measuring tube 2 Cap 3 for measuring tube 3 Power supply Order No 300 0000 400 0200 112820 112821 112822 112932 112937 112938 112872 112877 112878 400 0700 Rheomat R 140 14 en en i Order No Measuring tube of aluminium set of 100 111 931 Measuring bob No 4 14mm 10 5mm for high viscosities 111 906 Measuring bob No 9 31 5mm 45mm for high shear rates and low viscosities forms with measuring tube 1 measuring system 19 111 875 Double slit system MS 0 for low viscosities 112 823 Measurement systems ISO 2555 set 111 948 Measurement system TV set 111 949 Software Rhesy 180 A 4000608 Software Rhesy 180 S 4000610 Cable RS 232 4010920 Cable USB 4010922 Rheomat R 140 15 ees AAA Adapter VT02 Measuring sys tems Adapter Brookfield Messsysteme Measuring bob VT 1 Measuring bob VT 2 Measuring bob VT 3 Measuring cup VT Centering part Stand for cone plate measurements 401 0113 401 0114 200 0191 200 0192 200 0193 200 0210 200 0300 400 0300 Rheomat R 140
5. lt P proRheo Operating Instructions Rheomat H 140 Index 1 EG UN CNG EE 2 2 Measurement Prineipl sissies EEN EE SEE Ge RE Eed se ee be ee ee Ee ee ie 2 N od le OE OE ER eee EE 5 3 1 Instrument dele ie OE EE EE EE 5 3 2 Instrument e EE 5 3 2 1 PRON VIEW Ee 5 322 Side WIR WY ESE EE Ne RS Ne Dk ee Ke ee Ne N oe GO eSiS 6 4 The GEE EE DR OE EE ere 7 BN E 8 EE Ee EE EE OE IE EL NE EE N OE ED 8 D2 Me s ring Systems ei RE ER OE AE De N AE EE Ba ORN Dee EO DEERE Dee ee 8 GE vi ER ET ORE ER EE EN 9 6 1 EE 9 6 1 1 Temperature KEE 9 6 1 2 Zero Ee Ed E 10 6 2 BW EE 10 6 2 1 Change Sheartale ss ONE ER EE Ee ed ER ER Ge DE EG GR ee 11 6 2 2 Cancel Measurenien sisie EDE GE ESE RD IE DEE EG SE SR ED EE Re ee 11 AN el EA ME EO EE EE EE N 12 7 14 User Instructions ee GE ee Ee ae ee Ge ee ee nnn 12 7 2 oe EE EE EE EE N EO EE ead 12 7 2 1 Cleaning MA Ee EE AE E 12 7 2 2 Calibration and Testing WEE 13 73 Erros and Malfunctions 2 EE EE ESE EE DER He ee EE HE Ee EE eisai niceties 13 7 3 1 Accessories and Order Numbers iii ee RR ee ee 14 74 Technical Data and TableS isi Ee EE ER EE EE EGO Ee Ge ER 17 7 4 1 Measuring Head PI es RE Ds ss RR BEE ee 17 7 42 DIN Measuring Systems isi ees ees ee ee AA ee ee AA 18 7 4 3 Relative Measuring Gvstems iis 19 7 5 Support Service Request EEN 21 proRheo GmbH Bahnhofstr 38 D 75382 Althengstett Tel 49 7051 77176 Fax 49 7051 77187 office proRheo de www proRheo de
6. 0 0 005 4 4 ca 0 5 6 50 2 15 3 000 0 010 17 6 ca 1 5 7 20 0 5 60 12 000 0 020 68 ca 0 2 8 20 2 15 3 000 0 070 275 ca 0 5 9 70 0 5 60 12 000 0 002 1 6 ca 1 10 70 2 15 3 000 0 002 19 ca 3 5 Double gap system following DIN Standard 54 453 E Tube Bob Shear rate Viscosity Fill y EW Pa s Volume 7 mm mm ml 50 28 25 81 6 5 1291 0 001 5 Ca 38 32 54 30 Rheomat R 140 7 4 3 Relative Measuring systems Measuring bob 2 3 and 4 with measuring tube 1 Tube Bob Shear rate Viscosiy System Le Pa s mm Nr O mm Nr 12 32 54 1 24 2 1 7 354 0 027 104 13 32 54 1 14 3 0 8 152 0 210 800 23 26 03 2 14 3 0 95 190 0 240 900 14 32 54 1 14 4 0 8 152 0 545 2 080 These values are approximate only Measuring bob 1 2 3 and 4 without tube rotational speed 5 1000 min System No Bob No Viscosity Pa s 1 1 0 020 76 2 2 0 048 182 3 3 0 340 1 292 4 4 0 550 2 090 Instead of shear rate D the rotational speed n is displayed Systeme following ISO Standard 2555 rotational speed 5 1000 min System No Bob No Viscosity Pa s 61 1 0 007 26 62 2 0 028 106 63 3 0 070 264 64 4 0 139 529 65 5 0 278 1 057 66 6 0 696 2 643 67 7 2 783 10 574 Instead of shear rate D the rotational speed n is displayed Rh
7. alibrating and testing The proRheo R 140 can be calibrated only by proRheo service Special instruments and specialized knowledge are required proRheo offers service and calibration contracts According forms are provided in the annex To test whether the instrument is measuring properly and or proper measurements have been performed you can use calibration oils for viscosity measurements Glycerol hygroscopic and water viscosity too low are unsuitable 7 3 Errors and malfunctions Error malfunctions Reason Action The green lamp of the Not attached to power Check power supply power supply unit does not supply or power supply light up defective The display shows gt READY The entries are wrong or not stored correctly Internal buffer battery is discharged Switch off the R 140 and simultaneously press the hand key Reselect or re enter language and code Call ProRheo service The proRheo R 140 switches itself off Power supply unit dis connected from net Torque too high with single point measure ment Attach the power supply On restart either enter lower value for shear rate or select a smaller meas urement system Rheomat R 140 7 3 1 Accessories and order numbers Standard delivery includes measuring head power supply measuring tube 1 and measuring bob 2 aluminum Measuring instrument Stand comprising Stand base with adjustment screw
8. eomat R 140 19 Anchor Measuring Systems rotational speed 5 1000 min System No Bob No Viscosity Pa s 71 1 0 003 10 72 2 0 027 104 73 3 0 160 605 74 4 0 665 2 530 75 5 2 580 9 800 Instead of shear rate D the rotational speed n is displayed VT Measuring Systems Bells rotational speed 5 1000 min System No Bob No Viscosity Pa s 91 1 0 035 123 92 2 0 900 3 420 93 3 0 005 14 Instead of shear rate D the rotational speed n is displayed Rheomat R 140 20 7 5 Support Service Request Please fill in the following and send to our fax no 49 7051 92489 29 Company Contact person Department Telephone Fax Email Address Address Please contact us because of our Rheomat R 140 Serial number We d like to have the following information Service Contract RW Service Calibration m Technical Inquiry Rheomat R 140 21
9. gap Shear stress Tt Power which the Sample opposes to the shearing Viscosity n Proportion of shear rate and shear stress Measuring viscosity with the Rheomat R 140 the user determines the shear rate Shear stress respectively torque are measured Viscosity is calculated as nu D with T Ktau M 2 KTau mid 1 2 6 2LR C R R Terms see Figure 1 Note Frequently viscosity is not a constant but depending on the shearing The same sample can show different viscosities at different shear rates different measuring systems or different rotational speed Viscosity measurements can reach the same measurement results only at equal conditions Attention Viscosity comparisons of measurement data obtained with different instru ment types make sens only at measurements according DIN 53018 53019 For viscosity measurement with the Rheomat R 140 the shear rate is given The Rheomat R 140 works at rotational speeds between 5 and 1000 rpm From this result different shear rate ranges see Chapter 7 4 2 ff depending on the geometry of the measuring system The connection between rotational speed n and shear rate D is Rheomat R 140 3 n D KD or Dz KD n with 2 pe 2 Es a 1 30 R OE Terms see Figure 1 Using customized measuring systems the values KD and KTau can be calculated as shown above These values can be stored in the Rheomat R 140 as shown in chapter 5 2 Rheomat R 140 3 S
10. ing bob turns first fast and then slowly The measuring bob is not to be touched during adjustment b The value of the zero adjustment is stored until the next zero adjustment is processed c The Zero adjustment should be performed after the instrument has war med up Allow the Rheomat R 140 to run at a shear rate of 50 s for approx 30 s Attention With an empty measurement system the proRheo R 140 should not rotate faster than D 200 s 6 2 Measurement The viscosity of the sample is determined at a constant shear rate Immerse measurement system without cap in the sample or add the sample to the closed measurement system Filling volume see chapter 7 4 2 Switch on the Rheomat R 140 and wait until the display shows proRheo R 140 Note If you have to thermostat the sample wait until the desired temperature is displayed before starting the measurement Press the point key Enter number of measuring system and confirm with E Rheomat R 140 10 Enter shear rate and confirm with E Note a The values numbers for interval measurement system and shear rate are stored so that for the next measurement you can either confirm these with E or enter new values numbers b The shear rate range is 6 5 1291 s 1 for the DIN measurement systems 11 22 and 33 for other measurement systems see chapter 7 3 4 If you enter a number outside this range SHEAR RATE immediately reappears on the dis play to allow the co
11. ing head R 140 This can happen e g if the instrument is turned upside down for cleaning purposes The user has to take care that this does not happen Using a cryostat or similar instruments no steam may enter the instrument This can cause damages The user has to take care that this does not happen The R 140 measuring head may not be immersed into any liquid The user has to take care that this does not happen 7 2 Maintenance Warning The proRheo R 140 and the power supply may be opened only by quali fied service engineers Any demands for service or warranty expire if the instrument is opened by unauthor ized persons A net connected and opened instrument can cause injuries to user s life and limb Sensible parts and parts under voltage are not specially marked 7 2 1 Cleaning If the measuring head drive shaft coupling or stand are really dirty or badly con taminated clean only with a cloth moistened with soapy water gasoline or alcohol To clean the measuring head and measuring tube always uncouple these from the proRheo R 140 You can use appropriate solvents for the measurement systems Never place the O rings of the caps in organic solvents Lightly grease them with silicone grease Atno time any liquid may enter inside the measuring head R 140 This can happen e g if the instrument is turned upside down for cleaning purposes The user has to take care that this does not happen Rheomat R 140 12 7 2 2 C
12. nce on the measuring result Stirring up and filling the sample corresponds to a preshearing which can have an in fluence on the measuring result An according time of rest can have positive results but eventual sedimentation should be taken into account 6 1 1 Thermostating In general the viscosity of a sample is depending on the temperature Therefore we recommend using a commercial thermostat or cryostat for temperature control Close the measuring tube with its cap and dip the measuring tube as deep as possible into the bath Take care that no temperation fluid enters the sample With temperatures above 50 C you should take into consideration the heat losses due to air circulation around the measurement system as well as condensation We advise covering the top of the thermostat bath around the measuring tube Rheomat R 140 9 6 1 2 Zero adjustment You should perform a zero adjustment with the measurement system in the absence of sample every day and after each change of the measurement system The zero adjustment must be done under the same operating status as the following measure ments Battery or power supply operation Fix the desired measuring bob Attention The measuring bob is not to be immersed into the sample Press the 0 Zero Key and switch on the R 140 simultaneously During adjustment the display shows gt 0 lt When finished the display shows proRheo R 140 Note a During adjustment the measur
13. rrect value to be entered The measurement starts You are shown the following data on the display after approx 5 s the torque M in mNm e the shear rate D in s e the shear stress T in Pa e the calculated viscosity n in Pa s e the measurement system e g 11 The proRheo R 140 acquires several measured values per second and displays the recalculated mean values 6 2 1 Change shear rate During the measurement you can change the shear rate Press one of the numeric keys 1 to 9 SHEAR RATE appears in the display Enter new value and confirm with E Note If the torque is too large gt 10 mNm you are shown the message M TOO HIGH M torque You can either enter a lower value for the shear rate or if possible use a more suitable measurement system If the torque is too low lt 0 25 mNm you are shown the message M TOO LOW In this case you can enter a larger value for the shear rate or use a more suitable measurement system see chapter 7 4 2 6 2 2 Cancel measurement To terminate a single point measurement either press the arrow key or switch off the instrument Rheomat R 140 11 7 Appendix 7 1 User advice Any demands for service or warranty expire if the instrument is opened by unauthor ized persons A net connected and opened instrument can cause injuries to user s life and limb Sensible parts and parts under voltage are not specially marked At no time any liquid may enter inside the measur
14. tartup procedure 3 1 Location In the lab the stand optional accessory with the proRheo R 140 should be positioned on a level bench The Rheomat 140 can be operated at a temperature between 10 and 40 C 3 2 Installation 3 2 1 Front view Display D n Keypad Power On Power Off Stand Arm Instrument locking screw Control slit Stand Rod Measuring System Fig 2 Place stand rod in stand base and secure with the screw Slide stand arm unit over stand rod and secure with the screw in the desired posi tion Install the Rheomat 140 and fix with screw Rheomat R 140 5 3 2 2 Side view Handle for use without stand Instruments base to be fixed in stand Bayonet coupling to fix measuring tube Drive Axis with bayonet fixing for measuring bob PT100 Temperature sensor Optional Fig 3 Chose the measuring bob for your measurement and fix it to the drive axis bayo net closing Note The higher the viscosity of the sample the smaller the measuring bob to be used see Chapter 7 4 2 and 7 4 3 Push the measuring tube corresponding to the measuring system over the mount ing and connect Switch on the instrument Display shows proRheo R 140 Rheomat R 140 6 4 Keypad and Handling Keys Function Numbers Enter of numeric values E Confirmation of an entry Zero adjustment see Chapter 6 1 2 0 Zero Press power on and 0 simultaneo
15. usly Display shows gt 0 lt Definition of measuring systems see Chapter 5 2 1 Press power on and 1 simultaneously Display shows MESSYS NR Select Language see Chapter 5 1 Press power on and point simultaneously Display shows LAN GUAGE Sprache e Start measurement Decimal Point during entry The keys have different functions depending on the mode Please see the summary below Key Entry Function During operation Together with ON 1 D H Number E Confirm 0 Zero Number Automatic Zero adjustment Definition of own Measuring 1 One Number systems e Delete Terminates measurement Select Language e e Point Starts Measurement e 0 d 1 f 2 it 3 sp 4 hl 5 Rheomat R 140 7 5 Settings 5 1 Language When you switch the proRheo R 140 on for the first time the display is in German To ensure that the text appears in the language most appropriate to your needs you are offered a choice of 6 languages Exceptions are the words LANGUAGE CODE TRY AGAIN and CLEAR Press the hand key and at the same time switch the instrument on LANGUAGE appears on the display Enter one of the following numbers for your language s 0 English e 1 Deutsch e 2 Francais e 3 Italiano 4 Espanol e 5 Nederlands Press the E key to confirm the entry Your language is stored by the proRheo R 180 until you define a different one
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