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Summary of Contents for KERN ORA 4 RR
- Page 1 KERN & Sohn GmbH Ziegelei 1 Tel: +49-[0]7433-9933-0 D-72336 Balingen, Germany Fax: +49 (0)7433-9933-149 E-mail: info@kern-sohn.com Internet: www.kern-sohn.com Operating manual Analogue refractometer KERN ORA 4 RR Analogue nD (research special liquids) Version 1.0 01/2015 ORA_4RR-BA-e-1510...
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Page 2: Table Of Contents
KERN ORA Version 1.0 01/2015 Operating instructions Analogue refractometer Contents Technical data ....................3 Description ..................... 4 General information ..................5 Intended use ..........................5 Warranty ............................ 5 Basic safety information ................6 Follow the instructions in the operating manual ..............6 Warning ............................. -
Page 3: Technical Data
1 Technical data Dimensions Net weight Models Measuring Scale gradua- Product KERN range tions Accuracy Scales 137x40x40mm 0.135kg ORA 4RR nD: 1.440- 0.001 nD 1.520 Example scale on the ORA 4 RR ORA_4RR-BA-e-1510... -
Page 4: Description
2 Description 1. Prism cover 2. Prism surface 3. Adjustment screw 4. Eyepiece with rubber eyeshade 5. Diopter adjustment ring 6. Optical tubes with rubber grip 7. Storage box 8. Pipette 9. Refractometer 10. Distilled water / calibration liquid 11. Adjustment tool 12. -
Page 5: General Information
3 General information 3.1 Intended use The refractometer is a measuring instrument for determining the refractive index of transparent substances in liquid or in some cases also in the solid state. It is used to observe the behaviour of light as it passes from a prism with known properties to the substance being tested. -
Page 6: Basic Safety Information
4 Basic safety information 4.1 Follow the instructions in the operating manual Carefully read through the operating manual even if you have prior experience with KERN refractometers. Every language version includes a non-authoritative translation. The original German document is the definitive version. -
Page 7: Supplied Items
5 Supplied items After unpacking and before using the device for the first time, check that all listed parts have been supplied. Replace damaged or faulty parts immediately and do not put them into operation. Refractometer Storage box Pipette Adjustment tool Cleaning cloth Distilled water / calibration liquid 6 Before the first use... -
Page 8: Zero Point Calibration
7.1 Zero point calibration Hold up the refractometer against a sufficiently bright light source and look through the eyepiece [5], holding the rubber eyeshade [4] closely against your eye/glasses. Rotate the eyepiece [5] to adjust it for your eyesight, until you can see the scale sharply. -
Page 9: Additional Advice
7.2 Additional advice It is important that the samples being measured are representative samples. For samples that evaporate easily, measurements should be carried out quickly. The samples should be at the same temperature as the measuring instrument in order to achieve an accurate result. -
Page 10: Cleaning And Maintenance
The device housing may only be opened by trained service technicians authorised by KERN. 11 Disposal The packaging consists of environmentally friendly materials which can be disposed of via local recycling facilities. -
Page 11: Annex
13 Annex International Temperature Correction Table for °Brix (% sugar gradient) Table 1: Correct the result by the following values (refractometer must be correctly calibrated at 20 °C) % Brix reading 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 75.0 80.0 85.0 -0.53 -0.56 -0.59...
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