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Refractometer Forums
Add Refractometer to My Bench3 Results
Updated Dec 22 2021
1 Reply 
I just started work at a federal prison. The auto-refractor keeps saying error 222 when I turn it on and beeps continuously. Sometimes the error will go away if I turn it off and turn it back on. What does this error code mean and how do I fix it? RE: Canon - RK-F1
Updated Aug 12 2021
Updated Apr 7 2020
1 Reply Do you have a service manual for auto refractometer rk f1? i want to know how adjustment for this equipment. RE: Canon - RK-F1