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Operating manual
Analogue refractometer
KERN
KERN
Version 1.0
01/2015
GB
ORA_90BE_1RE-BA-e-1510
ORA 90 BE Analogue Expert
ORA 1 RE
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen, Germany
E-mail: info@kern-sohn.com
3x Brix scale
Analogue Expert
3x nD scale
Tel: +49-[0]7433-9933-0
Fax: +49 (0)7433-9933-149
Internet: www.kern-sohn.com
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Summary of Contents for KERN ORA 90 BE
- Page 1 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 90 BE Analogue Expert 3x Brix scale KERN ORA 1 RE Analogue Expert 3x nD scale Version 1.0 01/2015 ORA_90BE_1RE-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
Accuracy Scales 200x40x40mm 0.600kg ORA 90BE Brix: 0-42% 0.2 % Brix Brix: 42-71% 0.2 % Brix Brix: 71-90% 0.2 % Brix 200x40x40mm 0.600kg ORA 1RE nD: 1.333- 0.005 nD 1.5200 Example scale on the ORA 90 BE ORA_90BE-BA-e-1510... -
Page 4: Description
2 Description 1. Prism cover 2. Prism surface 3. Adjusting wheel measuring range 4. Dispersion adjusting ring 5. Optical tubes 6. Eyepiece with diopter adjustment ring 7. Storage box 8. Pipette 9. Refractometer 10. Distilled water / calibration liquid 11. Tools 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 Tools Cleaning cloth 6 Before the first use Remove the protective film (if present) from the prism surface [2] and move the... -
Page 8: Additional Advice
Important! The ambient/room temperature and the sample temperature influence the refracto- meter measuring result. The scales are designed for an ambient temperature of +20 °C! If the measurements are carried out at a temperature other than +20 °C, the results must be correspondingly corrected. -
Page 9: Measuring Procedure
Measuring procedure Make sure your hands are dry before handling the refractometer. Open the prism cover [1] and use the supplied pipette [8] to apply a few drops of the sample liquid [8] onto the prism surface [2], then close the prism cover [1]. -
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: Brix To Refractive Index (Nd) Conversion Table
13 Brix to refractive index (nD) conversion table Refractive Refractive Refractive BRIX index BRIX index BRIX index 1.33299 1.38115 1.44193 1.33442 1.38296 1.44420 1.33586 1.38478 1.44650 1.33732 1.38661 1.44881 1.33879 1.38846 1.45113 1.34026 1.39032 1.45348 1.34175 1.39220 1.45584 1.34325 1.39409 1.45822 1.34476 1.39600... -
Page 13: Annex
14 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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