You buy a honey refractometer and it comes ready calibrated. If you think it might need adjustment in the future take some olive oil and keep a sample, take a reading. That way you have a stock solution to calibrate in future
You buy a honey refractometer and it comes ready calibrated. If you think it might need adjustment in the future take some olive oil and keep a sample, take a reading. That way you have a stock solution to calibrate in future