EXTECH RF40 Manual
Contents
1. User s Guide EXTECH INSTRUMENTS A FLIR COMPANY Battery Coolant Refractometer with ATC Model RF40 Introduction Congratulations on the purchase of your RF40 Battery Coolant Refractometer with automatic temperature compensation This precision optical instrument should be handled gently avoid touching the optical surface Careful use of this instrument will provide years of reliable service Description 3 2 1 Eyepiece 2 Mirror tube 3 Adjustment Screw 4 Cover plate 5 4 5 Prism 60 59 60 63 50 56 50 60 40 52 EPAD 30 53 30 48 90 49 A 1 30 20 44 g 10 44 5 41 1 25 k 10 39 5 0 38 5 36 z 5 349 0 33 m eae EIN 10 30 10 25 1 15 15 25 15 21 id 20 19 20 16 25 12 Field of View 25 10 SEa ETHYLENE ep GLYCOL ep PROPYLENE GLYCOL WATERLINE Operation Specifications The instrument measures the refractive index of the sample Range 60 to 32 F for Propylene and Ethylene glycol freeze point 1 Zero Adjustment 1 15 to 1 30 specific gravity of battery acid Braa n or two e a sarees on the prism Resolution 2 F glycol freeze point ose the cover plate and rotate the adjusting screw so sg that the light dark boundary lines up with the waterline sole specinig gravity of battery acid Once the zero adjustment has been completed clean the Dimens2. ions 6 2x1 6x1 2 160x40x30mm prism with soft cloth Weight 7 0 oz 2009 2 Sample Preparation and Reading To take a sample reading simply place a few drops of a sample liquid on the measurement prism at the end of the instrument Lower the cover plate onto the sample and prism Open the prism cover and place 2 or 3 drops on the prism Close the cover so the liquid spreads across the entire surface of the prism without air bubbles or dry spots Allow the sample to remain on the prism for approximately 30 seconds While holding the instrument under a light source look through the eyepiece The Bad Bad Good freezing point of the liquid or the state of Q the battery liquid is determined by the a intersection of the boundary of the light and dark fields 2 known as the shadowline on the printed scale If the scale appears out of focus the eyepiece may be adjusted by rotating the knurled portion The instrument also features an eye guard to prevent stray light from entering the eyepiece and causing reflections It may be necessary to adjust the position of the light source to maximize the contrast of the shadowline Under normal conditions optimal contrast is obtained by holding the instrument underneath and perpendicular to a light source Once a reading has been taken wipe dry with a clean cloth do not wash or rinse and place the instrument in the supplied plastic case Store the instrument in a safe dry envi
3. ronment Temperature is one of the single most important factors influencing accurate refractometer readings and is one of the largest sources of error in measurement Temperature compensation relieves the user of the responsibility to measure temperature and apply a correction factor when taking readings This refractometer makes this correction automatically When ambient temperature varies from 68 F 20 C readings are automatically adjusted to compensate for temperature variance between 50 F to 86 F 10 C to 30 C Calibration and Repair Services Extech offers complete repair and calibration services for all of the products we sell For periodic calibration or repair of this Extech product call customer service for details on services available Extech recommends that calibration be performed on an annual basis to ensure calibration integrity Warranty EXTECH INSTRUVENTS 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 to 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 www extech com for contact information A Return Authorization RA number must be issued before any product is returned to Extech The sender is re
4. sponsible 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 expressed or implied ry Support line 781 890 7440 Technical support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User s Guide Software updates and other up to the minute product information visit our website wwv extech com Extech Instruments Corporation 285 Bear Hill Rd Waltham MA 02451 Copyright 2009 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form Version 3 0 January 2009
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