General Tools and Instruments DREF-UP320 - Manual

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Operation Manual
DREF/UP320 (DR303) Portable Digital Refractometer
The Brix concentration, Refractive index or other parameters are always needed in lab or our life. Optical
refractometer is very popular used to measure these parameters. The Digital refractometer with a digital
readout and LCD display will eliminate uncertainties and is more convenient to use. Just about 0.3ml-0.5ml
sample was needed. All our digital refractometers have the following characters:
z Automatic
Temperature Compensation
z Automatic Shut Off after 3 minutes
z Conversion between Centigrade and Fahrenheit Degree
z Alarm of Low Voltage & Low power consumption
z Temperature Measurement Range：0℃－40℃（32℉－104℉）
z Precision
of Measurement temperature：±0.1℃(2℉)
z Measurement temperature Resolution：0.1℃(2℉)
z Operation
Temperature：0℃－40℃（32℉－104℉）
z Storage temperature：-10℃－50℃ （14℉－122℉）
z Dimension ：185Ч59Ч45mm
z Weight：230g
z Power
Supply：1battery（9v）
z Operating Time：More than 1500 times per battery
ⅠParts:
Ⅱ Installation Battery:
In the case of no battery or low battery with alert of “(((“ on the upper left of LCD, you should install or
replace the battery. Open the battery cover on the back of the instrument, install a battery or replace the old
battery with a new one.
Ⅲ Power On and Off:
Press the “On/Off” button to turn it on or off. Temperature in Centigrade will
display when power on. The instrument will turn off automatically if there is no
any operation in three minutes.
Ⅳ Measurement of Temperature:
Temperature can be displayed at any time by press the “Temp” button during measurement.
The conversion between Fahrenheit and Centigrade can be made by pressing “Temp” button.