General Tools and Instruments DREF-UP320 - Manual (Page 2)

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ⅤConversion of Status of Scales:
1. Turn it off : Press the “On/Off” button to turn refractometer OFF
.
2. Synchronously hold “Blank” button and “Mes” button.
3. Turn it on : Press the “On/Off” button to turn refractometer ON
.
4. Repeat step 1-3 to set other scale.
Please be NOTICED:
The chosen status of scale will be stored no matter if power off.
Ⅵ Original Point Setting:
1. Completely clear prism window
2. Drop standard solution to fill the prism window
3. Hold “Blank” button for Five seconds till it twinkles “rEF” on LCD
Hold 5 seconds
4. Within 10 second after display “rEF”, press “Mes” button and hold it for Five seconds.
Hold 5 seconds
5. The instrument start to set Original Point. After Original Point, Setting is
finished. “End” will be displayed on LCD.
Please be NOTICED:
Be sure power of battery is sufficient and environment temperature is between 10-30
Centigrade degree. 18-22 Centigrade degree is better to get high zero precision after Original Point Setting.
Original Point setting can be operated under any scale status. Please find Original Point List in last page.