Calibrating your Sper Scientific 300069 Clinical Refractometer is crucial for ensuring accurate measurements. Here's a straightforward guide to help you calibrate your device effectively:
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Zero Point Calibration:
- Start by opening the COVER PLATE.
- Apply a few drops of distilled water (provided with your device) onto the PRISM platform.
- Close the COVER PLATE.
- Adjust the CALIBRATION screw until the boundary between the light and dark areas aligns with the bottom line on the scale.
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Preparing for Testing:
- Carefully dry both the prism platform and the COVER PLATE to remove any residual moisture.
- Place a few drops of your test solution onto the prism and close the COVER PLATE. This will allow the solution to spread evenly.
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Testing Procedure:
- Point the front of the refractometer towards a light source and focus the eyepiece on the boundary line.
- The position of this boundary line on the scale directly indicates the v/v percentage of alcohol in your sample at 20°C.
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Post-Testing Care:
- After each use, clean the prism with distilled water and a soft cloth to remove any remaining residue. This prevents contamination and maintains accuracy.
- Remember that the temperature of the zero-point calibration should match the temperature of your test solution. Adjust the zero point every 30 minutes if there are significant temperature variations.
Additional Tips:
- Avoid submerging the unit or allowing any liquid to enter the main body of the refractometer.
- Clean the refractometer after each use with a soft cotton cloth to avoid scratching the prism surface and ensure longevity.
- Store the device in a clean, dry, and non-corrosive environment, protecting it from strong impacts. Properly storing your Sper Scientific 300069 will help to maintain the integrity of its components.
