1. Switch ON the refracto-meter. Make sure the prism and the sample well are completely dry.




2. Using a plastic pipette, fill the sample well with distilled or deinoized water. Make sure the prism is completely covered.




3. Press the ZERO key. If no error messages appear, your unit is calibrated.




4. Gently absorb the ZERO water standard with a soft tissue. Use care not to scratch the prism surface. Dry the surface completely.




5. Using a plastic pipette, drip sample onto the prism surface. Fill the well completely.




6. Press the READ key. The results are displayed in unit of interest.

After measuring remove sample from the sample well by absorbing with a soft tissue. Using plastic pipettes, rinse prism and sample well with distilled or deionized water then wipe dry.