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1. again when the model number appears on the display The zero adjustment will now run approx 13 second test time during which the display will show CAL WAIT The zero adjustment eliminates display offset The adjustment is made with the device in the measurement position without a rotor connected To skip the adjustment wait 3 seconds and the MEASUREMENT display will appear Measurement Display When MEASUREMENT appears the unit is ready to measure MEASUREMENT 3 Model 345055 amp 345060 Version 4 0 December 2005 Viscosity Measurements Press the function button to start measuring The meter powers up in the range that was in use when the instrument was last turned off The motor turns continuously while measuring N Select the rotor type by briefly pressing the function button while in the measurement mode and selecting another rotor type Model 345055 R3 R4 R5 and Model 345060 R1 R2 R3 The display RX wait will appear for approx 3 seconds and the measurements will be made using the newly selected rotor measurement range always verify that the connected rotor matches the type selected on display The rotor type is displayed on the left side of the display the viscosity measurement is displayed on the right w Select one of the four measurement methods outlined in the section Measurement Methods later in this manual G Suspend the rotor and if required connect the measu2. the spring is not deflected With a load applied i e when the rotor is immersed in liquid the spring is twisted and the spring ends do not break the light sensor at the same time The difference is measured by the meter and readings are calculated and displayed Viscosity Values of Selected Substances In order to facilitate the selection of a suitable rotor the following table contains standard values for the viscosity of selected substances at a temperature of 20 C Substance Viscosity mPas Water 1t Sucrose solution 6 40g in 100 ml Water Coffee cream 10 Light crude oil 10 Glycol 20 Olive oil 84 Lubricant oil 300 bis 800 Lubricant oil 50 bis 1 000 Rhizinus oil 1 500 Honey 10 000 Bitumen 100 000 000t t Beyond the measuring range of the Models 345055 amp 345060 Conversions 1 mPas milli Pascal second 1 cP centi Poise 1 dPas deci Pascal second 1 P Poise 1 dPas deci Pascal second 100 mPas 6 Model 345055 amp 345060 Version 4 0 December 2005 Temperature Influence on Viscosity Viscosity is temperature dependant and therefore the temperature of the test material should be controlled The temperature should be recorded for each viscosity measurement e g 26 3 C 160 mPas i e the viscosity at 26 3 C is 160 milli Pascalseconds It is possible to determine the viscosity dependence on temperature by performing viscosity measurements at
3. 0mm 0 04 1 00mm 3 1 77 45 1mm 1 85 47 0mm 4 3 07 78 0mm 1 81 46 0mm 5 2 40 61 2mm 1 41 36 0mm h Rotor Measurement Ranges Display Model 345055 Rotor R4 1 5 to 33mPas 4 R5 15 to 150 mPas 5 R3 50 to 330 mPas 3 Model 345060 R3 0 3 to 13dPas 3 R1 3 to 150 dPas 1 R2 100 to 4000dPas 2 Cup Specifications Material Stainless steel or anodized aluminum Sample volume approx 400ml Measuring Cup Dimensions Type D Di hl h2 Modd A 3 54 90mm n a 2 97 75 5mm 3 75 95 5mm 345055 B 3 54 90mm 1 18 30mm 2 97 75 5mm 3 75 95 5mm 345055 3 2 07 52 6mm n a 2 95 75mm h1 h2 345060 2 Model 345055 amp 345060 Version 4 0 December 2005 Description Function button Digital display Stand clamp Rotor Support stand optional Point of orientation Battery compartment screw Battery container Stand mounts SS OO ON Or BN 0 Clamps for Cups A amp B 345055 1 Drive shaft Operation Powering the meter Firmly press and hold the function button until the model number appears on the display VT1 for the 345055 VT2 for the 345060 The model number will switch off and the zero adjust display will appear Zero Adjustment When the zero adjustment display appears the user has 3 seconds to press the function button to activate the automatic zero adjustment Press the button
4. 5 amp 345060 Version 4 0 December 2005 Measurement Methods 1 Measurement Method 1 The Rotor is immersed in any vessel The distance between the rotor and the wall of the vessel should not be smaller than the diameter of the rotor Advantages Ideal for comparing test solutions Ease of measurement and cleaning Method 1 2 Measurement Method 2 345055 only Solution under test is placed in measuring Cup A Advantages Repeatable measurement conditions and temperature control Small sample volume required Method 2 3 Measurement Method 3 345055 only Measuring Cup B is immersed in solution to be measured Advantage Measurement made directly in storage container 4 Measurement Method 4 345060 only Measurements are made in Cup 3 Temperature control in circular bath is possible Advantages Repeatable measurement conditions Smallest sample solution required 150ml Exact temperature control Method 4 5 Model 345055 amp 345060 Version 4 0 December 2005 Measurement Principle With the rotor rotating at a constant speed immersed in the liquid to be tested the rotational resistance viscosity of the liquid is measured and displayed directly on the digital display Technology The drive axis is connected to one side of a spiral spring and the rotor axis to the other end of the spring When rotating with no load applied the ends of the spring pass a light sensor at the same time since
5. User s Guide EXTECH INSTRUMENTS Digital Viscotesters Model 345060 High Range 0 3 to 4000 dPas Model 345055 Low Range 1 5 to 330 mPas Introduction Congratulations on your purchase of the Extech Digital Viscotester The Extech Viscotesters are rotational viscometers with a digital display specially suited for fast tests and comparative measurements on liquids Careful use of this meter will provide years of reliable service Specifications Display Multifunction Digital Display Drive 4V rated DC Servo Motor Rotational Drive Speed 62 5 RPM Measuring Range 345055 1 5 to 330 mPas 1 5 to 330cP 345060 0 3 to 4000 dPas 30 to 400 000cP Accuracy 5 of full scale t Repeatability 1 f Sample Temperature 300 F 150 C maximum Sample Volume approx 5 30z 150 ml Power Four 4 1 5V AA batteries Operating Temperature 50 to 104 F 10 to 40 C Rotor Dimensions Refer to the Rotor Specifications section Weight Case and accessories 4 4 Ibs 2 kg t Published accuracy assumes the use of supplied rotors For two consecutive measurements under identical measuring conditions Rotor Specifications Rotor Material Anodized aluminum or stainless steel Rotor Accuracy 3 Full Scale Rotor Dimensions Rotor No D h 1 0 94 24 0mm 2 08 53 0mm 2 0 59 15
6. ds should be performed regularly For this a standard liquid corresponding to the measuring range of the rotor must be used The measurement must be made in the original measuring cup that was supplied with the standard The value which is displayed on the viscotester must correspond to the value indicated on the provided certificate for the standard liquid within the specified tolerance accuracy of the measuring system accuracy for the certified viscosity Since viscosity depends largely on temperature the measurement must be made at the temperature indicated for the viscosity of the standard liquid 7 Model 345055 amp 345060 Version 4 0 December 2005 Battery Replacement 3 If the viscotester does not turn on or if the Change Batteries Change Batteries display appears the four 4 1 5V AA batteries must be replaced 1 Unlock the battery compartment by backing off the compartment locking screw approximately 1 2 turn Once the compartment is unlocked carefully pry off the compartment cover Replace the AA batteries observing polarity 4 Re attach the compartment cover and tighten the locking screw Calibration and Repair Services CAL RECOMMENDED If the CAL RECOMMENDED display appears the unit must be returned for calibration or other servicing Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Departmen
7. ring cup to the clamps Immerse the rotor into the test substance up to the dip mark on the rotor shaft oa Hold the unit horizontally by hand or with the optional stand use of the optional stand is recommended If held by hand hold the unit with the forefinger at the point of orientation see diagram Read the measured value on the display The value on the left side of the display represents the rotor type R1 to R5 The value on right is the viscosity measurement By pressing the function button momentarily 1 second the motor shuts off and the last measured value calculated for the viscosity will be frozen By pressing the function button again the measurement will be restarted in the range last used Turning the meter OFF From the measurement mode firmly press and hold the function button for approx 3 seconds to turn the instrument off The display will then alert the user as to the number of hours h remaining before a calibration service is due The display will then switch off SERVICE IN 300h Error Message Displays RX XX dPas Minimum measuring range exceeded use a larger rotor RX gt XXdPas Maximum measuring range exceeded use a smaller rotor SAFETY CUT OFF Maximum range exceeded for 5 subsequent measurements The error message appears and the motor stops OVERLOAD The electrical current limitation has been reached The unit automatically switches off Have the unit serviced 4 Model 34505
8. t for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website at www extech com click on Contact Extech and go to Service Department to request an RA number A Return Authorization RA number must be issued before any productis returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is e
9. two different temperatures and calculating the corresponding viscosity value in relation to the reference temperature Example For example at 18 C a measurement is taken and the reading is 200 mPas Another reading is taken at 24 C and the reading is 170 mPas This 6 change in temperature 24 18 6 C corresponds to a change in viscosity of 30mPas 200 170 30 mPas In this case the viscosity changes 5mPas for each degree refer to the table below Note 20 C is used as the reference temperature for instrument calibration Temperature C Viscosity mPa seconds 18 200 20 190 22 180 24 170 26 160 28 150 Comparing Viscometer Readings Test results of purely viscous Newtonian liquids e g mineral oils sugar solutions glycerine obtained with a viscotester can be compared directly with the results of other viscometers Most liquids however have a different viscosity measurement under differing shearing conditions size and design of the rotors the rotor speed etc For this reason test results of non Newtonian liquids obtained by two different types of viscometers are usually not comparable A viscometer with variable shearing conditions is required to perform such comparisons Note that Models 345055 and 345060 do not have a variable shearing function Verification of the Viscotester In order to verify the functionality of the viscotester tests on Newtonian liqui
10. xpressed or implied Saw N Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair Returns Ext 210 Email repair extech com Website www extech com Copyright 2005 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 8 Model 345055 amp 345060 Version 4 0 December 2005
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