Discussion Category:  Refractometers

RE: RFM970 INSTALLATION AND CALIBRATION

I have just carried out the installation of B&S RFM970, and calibrated same using distil water. The ri of Distilled water @ 20degees C was given as 1.33298. When calibrated at 25degrees C, it gave an ri of 1.33298, just like that of 20degrees. The expected norm @ 25degrees is 1.3325.

When the brix reading of sucrose of 10%, 20%, 30% and 50%w/w were taken, they were all off-norms. 9.55 instead of expected value 10.1; 19.61 instead of 20.1; 29.73 instead of 30.0; and 48.70 instead of 49.10.

What can I do to correct these off-norms? Please help.

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20110609155000940

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Asked by

20110609155000940
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